--- name: "libcurl-symbols" section: "3" platform: "linux" package: "curl" version: "8.23.0-1" release: "Arch Linux 2026-11-01" platforms: ["linux", "macos"] url: "https://new.carta.tech/libcurl-symbols" --- # libcurl-symbols(3) ## libcurl symbols This man page details version information for public symbols provided in the libcurl header files. This lists the first version in which the symbol was introduced and for some symbols two additional information pieces: The first version in which the symbol is marked "deprecated" - meaning that since that version no new code should be written to use the symbol as it is marked for getting removed in a future. The last version that featured the specific symbol. Using the symbol in source code makes it no longer compile error-free after that specified version. This man page is automatically generated from the symbols-in-versions file. - CURL\_AT\_LEAST\_VERSION Introduced in 7.43.0. - CURL\_BLOB\_COPY Introduced in 7.71.0. - CURL\_BLOB\_NOCOPY Introduced in 7.71.0. - CURL\_CHUNK\_BGN\_FUNC\_FAIL Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURL\_CHUNK\_BGN\_FUNC\_OK Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURL\_CHUNK\_BGN\_FUNC\_SKIP Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURL\_CHUNK\_END\_FUNC\_FAIL Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_END\_FUNCTION(3)](/CURLOPT_CHUNK_END_FUNCTION/3.md)*. - CURL\_CHUNK\_END\_FUNC\_OK Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_END\_FUNCTION(3)](/CURLOPT_CHUNK_END_FUNCTION/3.md)*. - CURL\_CSELECT\_ERR Introduced in 7.16.3. See *[curl\_multi\_socket\_action(3)](/curl_multi_socket_action/3.md)*. - CURL\_CSELECT\_IN Introduced in 7.16.3. See *[curl\_multi\_socket\_action(3)](/curl_multi_socket_action/3.md)*. - CURL\_CSELECT\_OUT Introduced in 7.16.3. See *[curl\_multi\_socket\_action(3)](/curl_multi_socket_action/3.md)*. - CURL\_DEPRECATED Introduced in 7.87.0. - CURL\_DID\_MEMORY\_FUNC\_TYPEDEFS Introduced in 7.49.0. - CURL\_EASY\_NONE Introduced in 7.14.0. Last used in 7.15.4. - CURL\_EASY\_TIMEOUT Introduced in 7.14.0. Last used in 7.15.4. - CURL\_ERROR\_SIZE Introduced in 7.1. - CURL\_FNMATCHFUNC\_FAIL Introduced in 7.21.0. See *[CURLOPT\_FNMATCH\_FUNCTION(3)](/CURLOPT_FNMATCH_FUNCTION/3.md)*. - CURL\_FNMATCHFUNC\_MATCH Introduced in 7.21.0. See *[CURLOPT\_FNMATCH\_FUNCTION(3)](/CURLOPT_FNMATCH_FUNCTION/3.md)*. - CURL\_FNMATCHFUNC\_NOMATCH Introduced in 7.21.0. See *[CURLOPT\_FNMATCH\_FUNCTION(3)](/CURLOPT_FNMATCH_FUNCTION/3.md)*. - CURL\_FORMADD\_DISABLED Introduced in 7.12.1. Deprecated since 7.56.0. - CURL\_FORMADD\_ILLEGAL\_ARRAY Introduced in 7.9.8. Deprecated since 7.56.0. - CURL\_FORMADD\_INCOMPLETE Introduced in 7.9.8. Deprecated since 7.56.0. - CURL\_FORMADD\_MEMORY Introduced in 7.9.8. Deprecated since 7.56.0. - CURL\_FORMADD\_NULL Introduced in 7.9.8. Deprecated since 7.56.0. - CURL\_FORMADD\_OK Introduced in 7.9.8. Deprecated since 7.56.0. - CURL\_FORMADD\_OPTION\_TWICE Introduced in 7.9.8. Deprecated since 7.56.0. - CURL\_FORMADD\_UNKNOWN\_OPTION Introduced in 7.9.8. Deprecated since 7.56.0. - CURL\_GLOBAL\_ACK\_EINTR Introduced in 7.30.0. See *[curl\_global\_init(3)](/curl_global_init/3.md)*. - CURL\_GLOBAL\_ALL Introduced in 7.8. See *[curl\_global\_init(3)](/curl_global_init/3.md)*. - CURL\_GLOBAL\_DEFAULT Introduced in 7.8. See *[curl\_global\_init(3)](/curl_global_init/3.md)*. - CURL\_GLOBAL\_NOTHING Introduced in 7.8. See *[curl\_global\_init(3)](/curl_global_init/3.md)*. - CURL\_GLOBAL\_SSL Introduced in 7.8. See *[curl\_global\_init(3)](/curl_global_init/3.md)*. - CURL\_GLOBAL\_WIN32 Introduced in 7.8.1. Deprecated since 8.23.0. - CURL\_GLOBAL\_WINSOCK Introduced in 8.23.0. See *[curl\_global\_init(3)](/curl_global_init/3.md)*. - CURL\_HAS\_DECLSPEC\_ATTRIBUTE Introduced in 8.13.0. - CURL\_HET\_DEFAULT Introduced in 7.59.0. See *[CURLOPT\_HAPPY\_EYEBALLS\_TIMEOUT\_MS(3)](/CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS/3.md)*. - CURL\_HTTP\_VERSION\_1\_0 Introduced in 7.9.1. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTP\_VERSION\_1\_1 Introduced in 7.9.1. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTP\_VERSION\_2 Introduced in 7.43.0. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTP\_VERSION\_2\_0 Introduced in 7.33.0. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTP\_VERSION\_2\_PRIOR\_KNOWLEDGE Introduced in 7.49.0. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTP\_VERSION\_2TLS Introduced in 7.47.0. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTP\_VERSION\_3 Introduced in 7.66.0. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTP\_VERSION\_3ONLY Introduced in 7.88.0. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTP\_VERSION\_NONE Introduced in 7.9.1. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURL\_HTTPPOST\_BUFFER Introduced in 7.46.0. See *[curl\_formadd(3)](/curl_formadd/3.md)*. - CURL\_HTTPPOST\_CALLBACK Introduced in 7.46.0. See *[curl\_formadd(3)](/curl_formadd/3.md)*. - CURL\_HTTPPOST\_FILENAME Introduced in 7.46.0. See *[curl\_formadd(3)](/curl_formadd/3.md)*. - CURL\_HTTPPOST\_LARGE Introduced in 7.46.0. See *[curl\_formadd(3)](/curl_formadd/3.md)*. - CURL\_HTTPPOST\_PTRBUFFER Introduced in 7.46.0. See *[curl\_formadd(3)](/curl_formadd/3.md)*. - CURL\_HTTPPOST\_PTRCONTENTS Introduced in 7.46.0. See *[curl\_formadd(3)](/curl_formadd/3.md)*. - CURL\_HTTPPOST\_PTRNAME Introduced in 7.46.0. See *[curl\_formadd(3)](/curl_formadd/3.md)*. - CURL\_HTTPPOST\_READFILE Introduced in 7.46.0. See *[curl\_formadd(3)](/curl_formadd/3.md)*. - CURL\_IGNORE\_DEPRECATION Introduced in 7.87.0. - CURL\_IPRESOLVE\_V4 Introduced in 7.10.8. See *[CURLOPT\_IPRESOLVE(3)](/CURLOPT_IPRESOLVE/3.md)*. - CURL\_IPRESOLVE\_V6 Introduced in 7.10.8. See *[CURLOPT\_IPRESOLVE(3)](/CURLOPT_IPRESOLVE/3.md)*. - CURL\_IPRESOLVE\_WHATEVER Introduced in 7.10.8. See *[CURLOPT\_IPRESOLVE(3)](/CURLOPT_IPRESOLVE/3.md)*. - CURL\_ISOCPP Introduced in 7.10.2. Last used in 8.14.1. - CURL\_LOCK\_ACCESS\_NONE Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_ACCESS\_SHARED Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_ACCESS\_SINGLE Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_DATA\_CONNECT Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_DATA\_COOKIE Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_DATA\_DNS Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_DATA\_HSTS Introduced in 7.88.0. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_DATA\_NONE Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_DATA\_PSL Introduced in 7.61.0. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_DATA\_SHARE Introduced in 7.10.4. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_DATA\_SSL\_SESSION Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURL\_LOCK\_TYPE\_CONNECT Introduced in 7.10. Last used in 7.10.2. - CURL\_LOCK\_TYPE\_COOKIE Introduced in 7.10. Last used in 7.10.2. - CURL\_LOCK\_TYPE\_DNS Introduced in 7.10. Last used in 7.10.2. - CURL\_LOCK\_TYPE\_NONE Introduced in 7.10. Last used in 7.10.2. - CURL\_LOCK\_TYPE\_SSL\_SESSION Introduced in 7.10. Last used in 7.10.2. - CURL\_MAX\_HTTP\_HEADER Introduced in 7.19.7. - CURL\_MAX\_READ\_SIZE Introduced in 7.53.0. - CURL\_MAX\_WRITE\_SIZE Introduced in 7.9.7. - CURL\_NETRC\_IGNORED Introduced in 7.9.8. - CURL\_NETRC\_OPTIONAL Introduced in 7.9.8. - CURL\_NETRC\_REQUIRED Introduced in 7.9.8. - CURL\_POLL\_IN Introduced in 7.14.0. See *[CURLMOPT\_SOCKETFUNCTION(3)](/CURLMOPT_SOCKETFUNCTION/3.md)*. - CURL\_POLL\_INOUT Introduced in 7.14.0. See *[CURLMOPT\_SOCKETFUNCTION(3)](/CURLMOPT_SOCKETFUNCTION/3.md)*. - CURL\_POLL\_NONE Introduced in 7.14.0. See *[CURLMOPT\_SOCKETFUNCTION(3)](/CURLMOPT_SOCKETFUNCTION/3.md)*. - CURL\_POLL\_OUT Introduced in 7.14.0. See *[CURLMOPT\_SOCKETFUNCTION(3)](/CURLMOPT_SOCKETFUNCTION/3.md)*. - CURL\_POLL\_REMOVE Introduced in 7.14.0. See *[CURLMOPT\_SOCKETFUNCTION(3)](/CURLMOPT_SOCKETFUNCTION/3.md)*. - CURL\_PREREQFUNC\_ABORT Introduced in 7.79.0. - CURL\_PREREQFUNC\_OK Introduced in 7.79.0. - CURL\_PROGRESS\_BAR Introduced in 7.1.1. Last used in 7.4.1. - CURL\_PROGRESS\_STATS Introduced in 7.1.1. Last used in 7.4.1. - CURL\_PROGRESSFUNC\_CONTINUE Introduced in 7.68.0. - CURL\_PULL\_SYS\_POLL\_H Introduced in 7.56.0. - CURL\_PUSH\_DENY Introduced in 7.44.0. - CURL\_PUSH\_ERROROUT Introduced in 7.72.0. - CURL\_PUSH\_OK Introduced in 7.44.0. - CURL\_READFUNC\_ABORT Introduced in 7.12.1. - CURL\_READFUNC\_PAUSE Introduced in 7.18.0. - CURL\_REDIR\_GET\_ALL Introduced in 7.19.1. - CURL\_REDIR\_POST\_301 Introduced in 7.19.1. See *[CURLOPT\_POSTREDIR(3)](/CURLOPT_POSTREDIR/3.md)*. - CURL\_REDIR\_POST\_302 Introduced in 7.19.1. See *[CURLOPT\_POSTREDIR(3)](/CURLOPT_POSTREDIR/3.md)*. - CURL\_REDIR\_POST\_303 Introduced in 7.26.0. See *[CURLOPT\_POSTREDIR(3)](/CURLOPT_POSTREDIR/3.md)*. - CURL\_REDIR\_POST\_ALL Introduced in 7.19.1. See *[CURLOPT\_POSTREDIR(3)](/CURLOPT_POSTREDIR/3.md)*. - CURL\_RTSPREQ\_ANNOUNCE Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_DESCRIBE Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_GET\_PARAMETER Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_NONE Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_OPTIONS Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_PAUSE Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_PLAY Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_RECEIVE Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_RECORD Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_SET\_PARAMETER Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_SETUP Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_RTSPREQ\_TEARDOWN Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURL\_SEEKFUNC\_CANTSEEK Introduced in 7.19.5. See *[CURLOPT\_SEEKFUNCTION(3)](/CURLOPT_SEEKFUNCTION/3.md)*. - CURL\_SEEKFUNC\_FAIL Introduced in 7.19.5. See *[CURLOPT\_SEEKFUNCTION(3)](/CURLOPT_SEEKFUNCTION/3.md)*. - CURL\_SEEKFUNC\_OK Introduced in 7.19.5. See *[CURLOPT\_SEEKFUNCTION(3)](/CURLOPT_SEEKFUNCTION/3.md)*. - CURL\_SOCKET\_BAD Introduced in 7.14.0. - CURL\_SOCKET\_TIMEOUT Introduced in 7.14.0. - CURL\_SOCKOPT\_ALREADY\_CONNECTED Introduced in 7.21.5. - CURL\_SOCKOPT\_ERROR Introduced in 7.21.5. - CURL\_SOCKOPT\_OK Introduced in 7.21.5. - CURL\_SSLVERSION\_DEFAULT Introduced in 7.9.2. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_MAX\_DEFAULT Introduced in 7.54.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_MAX\_NONE Introduced in 7.54.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_MAX\_TLSv1\_0 Introduced in 7.54.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_MAX\_TLSv1\_1 Introduced in 7.54.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_MAX\_TLSv1\_2 Introduced in 7.54.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_MAX\_TLSv1\_3 Introduced in 7.54.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_SSLv2 Introduced in 7.9.2. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_SSLv3 Introduced in 7.9.2. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_TLSv1 Introduced in 7.9.2. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_TLSv1\_0 Introduced in 7.34.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_TLSv1\_1 Introduced in 7.34.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_TLSv1\_2 Introduced in 7.34.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_SSLVERSION\_TLSv1\_3 Introduced in 7.52.0. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURL\_STRICTER Introduced in 7.50.2. - CURL\_TIMECOND\_IFMODSINCE Introduced in 7.9.7. See *[CURLOPT\_TIMECONDITION(3)](/CURLOPT_TIMECONDITION/3.md)*. - CURL\_TIMECOND\_IFUNMODSINCE Introduced in 7.9.7. See *[CURLOPT\_TIMECONDITION(3)](/CURLOPT_TIMECONDITION/3.md)*. - CURL\_TIMECOND\_LASTMOD Introduced in 7.9.7. See *[CURLOPT\_TIMECONDITION(3)](/CURLOPT_TIMECONDITION/3.md)*. - CURL\_TIMECOND\_NONE Introduced in 7.9.7. See *[CURLOPT\_TIMECONDITION(3)](/CURLOPT_TIMECONDITION/3.md)*. - CURL\_TLSAUTH\_NONE Introduced in 7.21.4. Deprecated since 8.22.0. - CURL\_TLSAUTH\_SRP Introduced in 7.21.4. Deprecated since 8.22.0. - CURL\_TRAILERFUNC\_ABORT Introduced in 7.64.0. See *[CURLOPT\_TRAILERFUNCTION(3)](/CURLOPT_TRAILERFUNCTION/3.md)*. - CURL\_TRAILERFUNC\_OK Introduced in 7.64.0. See *[CURLOPT\_TRAILERFUNCTION(3)](/CURLOPT_TRAILERFUNCTION/3.md)*. - CURL\_UPKEEP\_INTERVAL\_DEFAULT Introduced in 7.62.0. - CURL\_VERSION\_ALTSVC Introduced in 7.64.1. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_ASYNCHDNS Introduced in 7.10.7. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_BITS Introduced in 7.43.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_BROTLI Introduced in 7.57.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_CONV Introduced in 7.15.4. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_CURLDEBUG Introduced in 7.19.6. Deprecated since 8.19.0. - CURL\_VERSION\_DEBUG Introduced in 7.10.6. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_GSASL Introduced in 7.76.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_GSSAPI Introduced in 7.38.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_GSSNEGOTIATE Introduced in 7.10.6. Deprecated since 7.38.0. - CURL\_VERSION\_HSTS Introduced in 7.74.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_HTTP2 Introduced in 7.33.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_HTTP3 Introduced in 7.66.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_HTTPS\_PROXY Introduced in 7.52.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_IDN Introduced in 7.12.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_IPV6 Introduced in 7.10. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_KERBEROS4 Introduced in 7.10. Deprecated since 7.33.0. - CURL\_VERSION\_KERBEROS5 Introduced in 7.40.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_LARGEFILE Introduced in 7.11.1. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_LIBZ Introduced in 7.10. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_MULTI\_SSL Introduced in 7.56.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_NTLM Introduced in 7.10.6. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_NTLM\_WB Introduced in 7.22.0. Deprecated since 8.8.0. - CURL\_VERSION\_PSL Introduced in 7.47.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_SPNEGO Introduced in 7.10.8. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_SSL Introduced in 7.10. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_SSPI Introduced in 7.13.2. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_THREADSAFE Introduced in 7.84.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_TLSAUTH\_SRP Introduced in 7.21.4. Deprecated since 8.22.0. - CURL\_VERSION\_UNICODE Introduced in 7.72.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_UNIX\_SOCKETS Introduced in 7.40.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_VERSION\_ZSTD Introduced in 7.72.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURL\_WAIT\_POLLIN Introduced in 7.28.0. - CURL\_WAIT\_POLLOUT Introduced in 7.28.0. - CURL\_WAIT\_POLLPRI Introduced in 7.28.0. - CURL\_WIN32 Introduced in 7.69.0. Last used in 8.5.0. - CURL\_WRITEFUNC\_ERROR Introduced in 7.87.0. - CURL\_WRITEFUNC\_PAUSE Introduced in 7.18.0. - CURL\_ZERO\_TERMINATED Introduced in 7.56.0. - CURLALTSVC\_H1 Introduced in 7.64.1. See *[CURLOPT\_ALTSVC\_CTRL(3)](/CURLOPT_ALTSVC_CTRL/3.md)*. - CURLALTSVC\_H2 Introduced in 7.64.1. See *[CURLOPT\_ALTSVC\_CTRL(3)](/CURLOPT_ALTSVC_CTRL/3.md)*. - CURLALTSVC\_H3 Introduced in 7.64.1. See *[CURLOPT\_ALTSVC\_CTRL(3)](/CURLOPT_ALTSVC_CTRL/3.md)*. - CURLALTSVC\_READONLYFILE Introduced in 7.64.1. See *[CURLOPT\_ALTSVC\_CTRL(3)](/CURLOPT_ALTSVC_CTRL/3.md)*. - CURLAUTH\_ANY Introduced in 7.10.6. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_ANYSAFE Introduced in 7.10.6. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_AWS\_SIGV4 Introduced in 7.75.0. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_HTTPSIG Introduced in 8.22.0. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_BASIC Introduced in 7.10.6. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_BEARER Introduced in 7.61.0. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_DIGEST Introduced in 7.10.6. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_DIGEST\_IE Introduced in 7.19.3. Deprecated since 8.21.0. - CURLAUTH\_GSSAPI Introduced in 7.55.0. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_GSSNEGOTIATE Introduced in 7.10.6. Deprecated since 7.38.0. - CURLAUTH\_NEGOTIATE Introduced in 7.38.0. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_NONE Introduced in 7.10.6. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_NTLM Introduced in 7.10.6. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLAUTH\_NTLM\_WB Introduced in 7.22.0. Deprecated since 8.8.0. - CURLAUTH\_ONLY Introduced in 7.21.3. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLCLOSEPOLICY\_CALLBACK Introduced in 7.7. Deprecated since 7.16.1. - CURLCLOSEPOLICY\_LEAST\_RECENTLY\_USED Introduced in 7.7. Deprecated since 7.16.1. - CURLCLOSEPOLICY\_LEAST\_TRAFFIC Introduced in 7.7. Deprecated since 7.16.1. - CURLCLOSEPOLICY\_NONE Introduced in 7.7. Deprecated since 7.16.1. - CURLCLOSEPOLICY\_OLDEST Introduced in 7.7. Deprecated since 7.16.1. - CURLCLOSEPOLICY\_SLOWEST Introduced in 7.7. Deprecated since 7.16.1. - CURLE\_ABORTED\_BY\_CALLBACK Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_AGAIN Introduced in 7.18.2. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_ALREADY\_COMPLETE Introduced in 7.7.2. Deprecated since 7.8. - CURLE\_AUTH\_ERROR Introduced in 7.66.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_BAD\_CALLING\_ORDER Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_BAD\_CONTENT\_ENCODING Introduced in 7.10. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_BAD\_DOWNLOAD\_RESUME Introduced in 7.10. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_BAD\_FUNCTION\_ARGUMENT Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_BAD\_PASSWORD\_ENTERED Introduced in 7.4.2. Deprecated since 7.17.0. - CURLE\_CHUNK\_FAILED Introduced in 7.21.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_CONV\_FAILED Introduced in 7.15.4. Deprecated since 7.82.0. - CURLE\_CONV\_REQD Introduced in 7.15.4. Deprecated since 7.82.0. - CURLE\_COULDNT\_CONNECT Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_COULDNT\_RESOLVE\_HOST Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_COULDNT\_RESOLVE\_PROXY Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_ECH\_REQUIRED Introduced in 8.8.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FAILED\_INIT Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FILE\_COULDNT\_READ\_FILE Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FILESIZE\_EXCEEDED Introduced in 7.10.8. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_ACCEPT\_FAILED Introduced in 7.24.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_ACCEPT\_TIMEOUT Introduced in 7.24.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_ACCESS\_DENIED Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FTP\_BAD\_DOWNLOAD\_RESUME Introduced in 7.1. Deprecated since 7.1. - CURLE\_FTP\_BAD\_FILE\_LIST Introduced in 7.21.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_CANT\_GET\_HOST Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_CANT\_RECONNECT Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FTP\_COULDNT\_GET\_SIZE Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FTP\_COULDNT\_RETR\_FILE Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_COULDNT\_SET\_ASCII Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FTP\_COULDNT\_SET\_BINARY Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FTP\_COULDNT\_SET\_TYPE Introduced in 7.17.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_COULDNT\_STOR\_FILE Introduced in 7.1. Deprecated since 7.16.3. - CURLE\_FTP\_COULDNT\_USE\_REST Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_PARTIAL\_FILE Introduced in 7.1. Deprecated since 7.1. - CURLE\_FTP\_PORT\_FAILED Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_PRET\_FAILED Introduced in 7.20.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_QUOTE\_ERROR Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FTP\_SSL\_FAILED Introduced in 7.11.0. Deprecated since 7.17.0. - CURLE\_FTP\_USER\_PASSWORD\_INCORRECT Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FTP\_WEIRD\_227\_FORMAT Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_WEIRD\_PASS\_REPLY Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_WEIRD\_PASV\_REPLY Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_FTP\_WEIRD\_SERVER\_REPLY Introduced in 7.1. Deprecated since 7.51.0. - CURLE\_FTP\_WEIRD\_USER\_REPLY Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FTP\_WRITE\_ERROR Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_FUNCTION\_NOT\_FOUND Introduced in 7.1. Deprecated since 7.53.0. - CURLE\_GOT\_NOTHING Introduced in 7.9.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_HTTP2 Introduced in 7.38.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_HTTP2\_STREAM Introduced in 7.49.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_HTTP3 Introduced in 7.68.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_HTTP\_NOT\_FOUND Introduced in 7.1. Deprecated since 7.10.3. - CURLE\_HTTP\_PORT\_FAILED Introduced in 7.3. Deprecated since 7.12.0. - CURLE\_HTTP\_POST\_ERROR Introduced in 7.1. Deprecated since 7.56.0. - CURLE\_HTTP\_RANGE\_ERROR Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_HTTP\_RETURNED\_ERROR Introduced in 7.10.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_INTERFACE\_FAILED Introduced in 7.12.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_LDAP\_CANNOT\_BIND Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_LDAP\_INVALID\_URL Introduced in 7.10.8. Deprecated since 7.82.0. - CURLE\_LDAP\_SEARCH\_FAILED Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_LIBRARY\_NOT\_FOUND Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_LOGIN\_DENIED Introduced in 7.13.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_MALFORMAT\_USER Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_NO\_CONNECTION\_AVAILABLE Introduced in 7.30.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_NOT\_BUILT\_IN Introduced in 7.21.5. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_OK Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_OPERATION\_TIMEDOUT Introduced in 7.10.2. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_OPERATION\_TIMEOUTED Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_OUT\_OF\_MEMORY Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_PARTIAL\_FILE Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_PEER\_FAILED\_VERIFICATION Introduced in 7.17.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_PROXY Introduced in 7.73.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_QUIC\_CONNECT\_ERROR Introduced in 7.69.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_QUOTE\_ERROR Introduced in 7.17.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_RANGE\_ERROR Introduced in 7.17.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_READ\_ERROR Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_RECURSIVE\_API\_CALL Introduced in 7.59.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_RECV\_ERROR Introduced in 7.10. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_REMOTE\_ACCESS\_DENIED Introduced in 7.17.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_REMOTE\_DISK\_FULL Introduced in 7.17.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_REMOTE\_FILE\_EXISTS Introduced in 7.17.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_REMOTE\_FILE\_NOT\_FOUND Introduced in 7.16.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_RTSP\_CSEQ\_ERROR Introduced in 7.20.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_RTSP\_SESSION\_ERROR Introduced in 7.20.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SEND\_ERROR Introduced in 7.10. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SEND\_FAIL\_REWIND Introduced in 7.12.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SETOPT\_OPTION\_SYNTAX Introduced in 7.78.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SHARE\_IN\_USE Introduced in 7.9.6. Deprecated since 7.17.0. - CURLE\_SSH Introduced in 7.16.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_CACERT Introduced in 7.10. Deprecated since 7.62.0. - CURLE\_SSL\_CACERT\_BADFILE Introduced in 7.16.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_CERTPROBLEM Introduced in 7.10. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_CIPHER Introduced in 7.10. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_CLIENTCERT Introduced in 7.77.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_CONNECT\_ERROR Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_CRL\_BADFILE Introduced in 7.19.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_ENGINE\_INITFAILED Introduced in 7.12.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_ENGINE\_NOTFOUND Introduced in 7.9.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_ENGINE\_SETFAILED Introduced in 7.9.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_INVALIDCERTSTATUS Introduced in 7.41.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_ISSUER\_ERROR Introduced in 7.19.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_PEER\_CERTIFICATE Introduced in 7.8. Deprecated since 7.17.1. - CURLE\_SSL\_PINNEDPUBKEYNOTMATCH Introduced in 7.39.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_SSL\_SHUTDOWN\_FAILED Introduced in 7.16.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_TELNET\_OPTION\_SYNTAX Introduced in 7.7. Deprecated since 7.78.0. - CURLE\_TFTP\_DISKFULL Introduced in 7.15.0. Deprecated since 7.17.0. - CURLE\_TFTP\_EXISTS Introduced in 7.15.0. Deprecated since 7.17.0. - CURLE\_TFTP\_ILLEGAL Introduced in 7.15.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_TFTP\_NOSUCHUSER Introduced in 7.15.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_TFTP\_NOTFOUND Introduced in 7.15.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_TFTP\_PERM Introduced in 7.15.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_TFTP\_UNKNOWNID Introduced in 7.15.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_TOO\_LARGE Introduced in 8.6.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_TOO\_MANY\_REDIRECTS Introduced in 7.5. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_UNKNOWN\_OPTION Introduced in 7.21.5. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_UNKNOWN\_TELNET\_OPTION Introduced in 7.7. Deprecated since 7.21.5. - CURLE\_UNRECOVERABLE\_POLL Introduced in 7.84.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_UNSUPPORTED\_PROTOCOL Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_UPLOAD\_FAILED Introduced in 7.16.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_URL\_MALFORMAT Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_URL\_MALFORMAT\_USER Introduced in 7.1. Deprecated since 7.17.0. - CURLE\_USE\_SSL\_FAILED Introduced in 7.17.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_WEIRD\_SERVER\_REPLY Introduced in 7.51.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLE\_WRITE\_ERROR Introduced in 7.1. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLFILETYPE\_DEVICE\_BLOCK Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFILETYPE\_DEVICE\_CHAR Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFILETYPE\_DIRECTORY Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFILETYPE\_DOOR Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFILETYPE\_FILE Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFILETYPE\_NAMEDPIPE Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFILETYPE\_SOCKET Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFILETYPE\_SYMLINK Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFILETYPE\_UNKNOWN Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFINFOFLAG\_KNOWN\_FILENAME Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFINFOFLAG\_KNOWN\_FILETYPE Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFINFOFLAG\_KNOWN\_GID Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFINFOFLAG\_KNOWN\_HLINKCOUNT Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFINFOFLAG\_KNOWN\_PERM Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFINFOFLAG\_KNOWN\_SIZE Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFINFOFLAG\_KNOWN\_TIME Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFINFOFLAG\_KNOWN\_UID Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLFOLLOW\_ALL Introduced in 8.13.0. - CURLFOLLOW\_FIRSTONLY Introduced in 8.13.0. - CURLFOLLOW\_OBEYCODE Introduced in 8.13.0. - CURLFORM\_ARRAY Introduced in 7.9.1. Deprecated since 7.56.0. - CURLFORM\_ARRAY\_END Introduced in 7.9.1. Deprecated since 7.9.5. - CURLFORM\_ARRAY\_START Introduced in 7.9.1. Deprecated since 7.9.5. - CURLFORM\_BUFFER Introduced in 7.9.8. Deprecated since 7.56.0. - CURLFORM\_BUFFERLENGTH Introduced in 7.9.8. Deprecated since 7.56.0. - CURLFORM\_BUFFERPTR Introduced in 7.9.8. Deprecated since 7.56.0. - CURLFORM\_CONTENTHEADER Introduced in 7.9.3. Deprecated since 7.56.0. - CURLFORM\_CONTENTLEN Introduced in 7.46.0. Deprecated since 7.56.0. - CURLFORM\_CONTENTSLENGTH Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_CONTENTTYPE Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_COPYCONTENTS Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_COPYNAME Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_END Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_FILE Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_FILECONTENT Introduced in 7.9.1. Deprecated since 7.56.0. - CURLFORM\_FILENAME Introduced in 7.9.6. Deprecated since 7.56.0. - CURLFORM\_NAMELENGTH Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_NOTHING Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_PTRCONTENTS Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_PTRNAME Introduced in 7.9. Deprecated since 7.56.0. - CURLFORM\_STREAM Introduced in 7.18.2. Deprecated since 7.56.0. - CURLFTP\_CREATE\_DIR Introduced in 7.19.4. See *[CURLOPT\_FTP\_CREATE\_MISSING\_DIRS(3)](/CURLOPT_FTP_CREATE_MISSING_DIRS/3.md)*. - CURLFTP\_CREATE\_DIR\_NONE Introduced in 7.19.4. See *[CURLOPT\_FTP\_CREATE\_MISSING\_DIRS(3)](/CURLOPT_FTP_CREATE_MISSING_DIRS/3.md)*. - CURLFTP\_CREATE\_DIR\_RETRY Introduced in 7.19.4. See *[CURLOPT\_FTP\_CREATE\_MISSING\_DIRS(3)](/CURLOPT_FTP_CREATE_MISSING_DIRS/3.md)*. - CURLFTPAUTH\_DEFAULT Introduced in 7.12.2. See *[CURLOPT\_FTPSSLAUTH(3)](/CURLOPT_FTPSSLAUTH/3.md)*. - CURLFTPAUTH\_SSL Introduced in 7.12.2. See *[CURLOPT\_FTPSSLAUTH(3)](/CURLOPT_FTPSSLAUTH/3.md)*. - CURLFTPAUTH\_TLS Introduced in 7.12.2. See *[CURLOPT\_FTPSSLAUTH(3)](/CURLOPT_FTPSSLAUTH/3.md)*. - CURLFTPMETHOD\_DEFAULT Introduced in 7.15.3. See *[CURLOPT\_FTP\_FILEMETHOD(3)](/CURLOPT_FTP_FILEMETHOD/3.md)*. - CURLFTPMETHOD\_MULTICWD Introduced in 7.15.3. See *[CURLOPT\_FTP\_FILEMETHOD(3)](/CURLOPT_FTP_FILEMETHOD/3.md)*. - CURLFTPMETHOD\_NOCWD Introduced in 7.15.3. See *[CURLOPT\_FTP\_FILEMETHOD(3)](/CURLOPT_FTP_FILEMETHOD/3.md)*. - CURLFTPMETHOD\_SINGLECWD Introduced in 7.15.3. See *[CURLOPT\_FTP\_FILEMETHOD(3)](/CURLOPT_FTP_FILEMETHOD/3.md)*. - CURLFTPSSL\_ALL Introduced in 7.11.0. Deprecated since 7.17.0. - CURLFTPSSL\_CCC\_ACTIVE Introduced in 7.16.2. See *[CURLOPT\_USE\_SSL(3)](/CURLOPT_USE_SSL/3.md)*. - CURLFTPSSL\_CCC\_NONE Introduced in 7.16.2. See *[CURLOPT\_USE\_SSL(3)](/CURLOPT_USE_SSL/3.md)*. - CURLFTPSSL\_CCC\_PASSIVE Introduced in 7.16.1. See *[CURLOPT\_USE\_SSL(3)](/CURLOPT_USE_SSL/3.md)*. - CURLFTPSSL\_CONTROL Introduced in 7.11.0. Deprecated since 7.17.0. - CURLFTPSSL\_NONE Introduced in 7.11.0. Deprecated since 7.17.0. - CURLFTPSSL\_TRY Introduced in 7.11.0. Deprecated since 7.17.0. - CURLGSSAPI\_DELEGATION\_FLAG Introduced in 7.22.0. See *[CURLOPT\_GSSAPI\_DELEGATION(3)](/CURLOPT_GSSAPI_DELEGATION/3.md)*. - CURLGSSAPI\_DELEGATION\_NONE Introduced in 7.22.0. See *[CURLOPT\_GSSAPI\_DELEGATION(3)](/CURLOPT_GSSAPI_DELEGATION/3.md)*. - CURLGSSAPI\_DELEGATION\_POLICY\_FLAG Introduced in 7.22.0. See *[CURLOPT\_GSSAPI\_DELEGATION(3)](/CURLOPT_GSSAPI_DELEGATION/3.md)*. - CURLH\_1XX Introduced in 7.83.0. See *[curl\_easy\_header(3)](/curl_easy_header/3.md)*. - CURLH\_CONNECT Introduced in 7.83.0. See *[curl\_easy\_header(3)](/curl_easy_header/3.md)*. - CURLH\_HEADER Introduced in 7.83.0. See *[curl\_easy\_header(3)](/curl_easy_header/3.md)*. - CURLH\_PSEUDO Introduced in 7.83.0. See *[curl\_easy\_header(3)](/curl_easy_header/3.md)*. - CURLH\_TRAILER Introduced in 7.83.0. See *[curl\_easy\_header(3)](/curl_easy_header/3.md)*. - CURLHE\_BAD\_ARGUMENT Introduced in 7.83.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLHE\_BADINDEX Introduced in 7.83.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLHE\_MISSING Introduced in 7.83.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLHE\_NOHEADERS Introduced in 7.83.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLHE\_NOREQUEST Introduced in 7.83.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLHE\_NOT\_BUILT\_IN Introduced in 7.83.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLHE\_OK Introduced in 7.83.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLHE\_OUT\_OF\_MEMORY Introduced in 7.83.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLHEADER\_SEPARATE Introduced in 7.37.0. See *[CURLOPT\_HEADEROPT(3)](/CURLOPT_HEADEROPT/3.md)*. - CURLHEADER\_UNIFIED Introduced in 7.37.0. See *[CURLOPT\_HEADEROPT(3)](/CURLOPT_HEADEROPT/3.md)*. - CURLHSTS\_ENABLE Introduced in 7.74.0. See *[CURLOPT\_HSTS\_CTRL(3)](/CURLOPT_HSTS_CTRL/3.md)*. - CURLHSTS\_READONLYFILE Introduced in 7.74.0. See *[CURLOPT\_HSTS\_CTRL(3)](/CURLOPT_HSTS_CTRL/3.md)*. - CURLHTTPSIG\_ED25519 Introduced in 8.22.0. - CURLHTTPSIG\_HMAC\_SHA256 Introduced in 8.22.0. - CURLHTTPSIG\_NONE Introduced in 8.22.0. - CURLINFO\_ACTIVESOCKET Introduced in 7.45.0. - CURLINFO\_APPCONNECT\_TIME Introduced in 7.19.0. - CURLINFO\_APPCONNECT\_TIME\_T Introduced in 7.61.0. - CURLINFO\_CAINFO Introduced in 7.84.0. - CURLINFO\_CAPATH Introduced in 7.84.0. - CURLINFO\_CERTINFO Introduced in 7.19.1. - CURLINFO\_CONDITION\_UNMET Introduced in 7.19.4. - CURLINFO\_CONN\_ID Introduced in 8.2.0. - CURLINFO\_CONNECT\_TIME Introduced in 7.4.1. - CURLINFO\_CONNECT\_TIME\_T Introduced in 7.61.0. - CURLINFO\_CONTENT\_LENGTH\_DOWNLOAD Introduced in 7.6.1. Deprecated since 7.55.0. - CURLINFO\_CONTENT\_LENGTH\_DOWNLOAD\_T Introduced in 7.55.0. - CURLINFO\_CONTENT\_LENGTH\_UPLOAD Introduced in 7.6.1. Deprecated since 7.55.0. - CURLINFO\_CONTENT\_LENGTH\_UPLOAD\_T Introduced in 7.55.0. - CURLINFO\_CONTENT\_TYPE Introduced in 7.9.4. - CURLINFO\_COOKIELIST Introduced in 7.14.1. - CURLINFO\_DATA\_IN Introduced in 7.9.6. See *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*. - CURLINFO\_DATA\_OUT Introduced in 7.9.6. See *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*. - CURLINFO\_DOUBLE Introduced in 7.4.1. - CURLINFO\_EARLYDATA\_SENT\_T Introduced in 8.11.0. - CURLINFO\_EFFECTIVE\_METHOD Introduced in 7.72.0. - CURLINFO\_EFFECTIVE\_URL Introduced in 7.4. - CURLINFO\_END Introduced in 7.9.6. - CURLINFO\_FILETIME Introduced in 7.5. - CURLINFO\_FILETIME\_T Introduced in 7.59.0. - CURLINFO\_FTP\_ENTRY\_PATH Introduced in 7.15.4. - CURLINFO\_HEADER\_IN Introduced in 7.9.6. See *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*. - CURLINFO\_HEADER\_OUT Introduced in 7.9.6. See *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*. - CURLINFO\_HEADER\_SIZE Introduced in 7.4.1. - CURLINFO\_HTTP\_CODE Introduced in 7.4.1. Deprecated since 7.10.8. - CURLINFO\_HTTP\_CONNECTCODE Introduced in 7.10.7. - CURLINFO\_HTTP\_VERSION Introduced in 7.50.0. - CURLINFO\_HTTPAUTH\_AVAIL Introduced in 7.10.8. - CURLINFO\_HTTPAUTH\_USED Introduced in 8.12.0. - CURLINFO\_LASTONE Introduced in 7.4.1. - CURLINFO\_LASTSOCKET Introduced in 7.15.2. Deprecated since 7.45.0. - CURLINFO\_LOCAL\_IP Introduced in 7.21.0. - CURLINFO\_LOCAL\_PORT Introduced in 7.21.0. - CURLINFO\_LONG Introduced in 7.4.1. - CURLINFO\_MASK Introduced in 7.4.1. - CURLINFO\_NAMELOOKUP\_TIME Introduced in 7.4.1. - CURLINFO\_NAMELOOKUP\_TIME\_T Introduced in 7.61.0. - CURLINFO\_NONE Introduced in 7.4.1. - CURLINFO\_NUM\_CONNECTS Introduced in 7.12.3. - CURLINFO\_OFF\_T Introduced in 7.55.0. - CURLINFO\_OS\_ERRNO Introduced in 7.12.2. - CURLINFO\_POSTTRANSFER\_TIME\_T Introduced in 8.10.0. - CURLINFO\_PRETRANSFER\_TIME Introduced in 7.4.1. - CURLINFO\_PRETRANSFER\_TIME\_T Introduced in 7.61.0. - CURLINFO\_PRIMARY\_IP Introduced in 7.19.0. - CURLINFO\_PRIMARY\_PORT Introduced in 7.21.0. - CURLINFO\_PRIVATE Introduced in 7.10.3. - CURLINFO\_PROTOCOL Introduced in 7.52.0. Deprecated since 7.85.0. - CURLINFO\_PROXY\_ERROR Introduced in 7.73.0. - CURLINFO\_PROXY\_SSL\_VERIFYRESULT Introduced in 7.52.0. - CURLINFO\_PROXYAUTH\_AVAIL Introduced in 7.10.8. - CURLINFO\_PROXYAUTH\_USED Introduced in 8.12.0. - CURLINFO\_PTR Introduced in 7.54.1. - CURLINFO\_QUEUE\_TIME\_T Introduced in 8.6.0. - CURLINFO\_REDIRECT\_COUNT Introduced in 7.9.7. - CURLINFO\_REDIRECT\_TIME Introduced in 7.9.7. - CURLINFO\_REDIRECT\_TIME\_T Introduced in 7.61.0. - CURLINFO\_REDIRECT\_URL Introduced in 7.18.2. - CURLINFO\_REFERER Introduced in 7.76.0. - CURLINFO\_REQUEST\_SIZE Introduced in 7.4.1. - CURLINFO\_RESPONSE\_CODE Introduced in 7.10.8. - CURLINFO\_RETRY\_AFTER Introduced in 7.66.0. - CURLINFO\_RTSP\_CLIENT\_CSEQ Introduced in 7.20.0. - CURLINFO\_RTSP\_CSEQ\_RECV Introduced in 7.20.0. - CURLINFO\_RTSP\_SERVER\_CSEQ Introduced in 7.20.0. - CURLINFO\_RTSP\_SESSION\_ID Introduced in 7.20.0. - CURLINFO\_SCHEME Introduced in 7.52.0. - CURLINFO\_SIZE\_DELIVERED Introduced in 8.20.0. - CURLINFO\_SIZE\_DOWNLOAD Introduced in 7.4.1. Deprecated since 7.55.0. - CURLINFO\_SIZE\_DOWNLOAD\_T Introduced in 7.55.0. - CURLINFO\_SIZE\_UPLOAD Introduced in 7.4.1. Deprecated since 7.55.0. - CURLINFO\_SIZE\_UPLOAD\_T Introduced in 7.55.0. - CURLINFO\_SLIST Introduced in 7.12.3. - CURLINFO\_SOCKET Introduced in 7.45.0. - CURLINFO\_SPEED\_DOWNLOAD Introduced in 7.4.1. Deprecated since 7.55.0. - CURLINFO\_SPEED\_DOWNLOAD\_T Introduced in 7.55.0. - CURLINFO\_SPEED\_UPLOAD Introduced in 7.4.1. Deprecated since 7.55.0. - CURLINFO\_SPEED\_UPLOAD\_T Introduced in 7.55.0. - CURLINFO\_SSL\_DATA\_IN Introduced in 7.12.1. See *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*. - CURLINFO\_SSL\_DATA\_OUT Introduced in 7.12.1. See *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*. - CURLINFO\_SSL\_ENGINES Introduced in 7.12.3. - CURLINFO\_SSL\_VERIFYRESULT Introduced in 7.5. - CURLINFO\_STARTTRANSFER\_TIME Introduced in 7.9.2. - CURLINFO\_STARTTRANSFER\_TIME\_T Introduced in 7.61.0. - CURLINFO\_STRING Introduced in 7.4.1. - CURLINFO\_TEXT Introduced in 7.9.6. See *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*. - CURLINFO\_TLS\_SESSION Introduced in 7.34.0. Deprecated since 7.48.0. - CURLINFO\_TLS\_SSL\_PTR Introduced in 7.48.0. - CURLINFO\_TOTAL\_TIME Introduced in 7.4.1. - CURLINFO\_TOTAL\_TIME\_T Introduced in 7.61.0. - CURLINFO\_TYPEMASK Introduced in 7.4.1. - CURLINFO\_USED\_PROXY Introduced in 8.7.0. - CURLINFO\_XFER\_ID Introduced in 8.2.0. - CURLIOCMD\_NOP Introduced in 7.12.3. See *[CURLOPT\_IOCTLFUNCTION(3)](/CURLOPT_IOCTLFUNCTION/3.md)*. - CURLIOCMD\_RESTARTREAD Introduced in 7.12.3. See *[CURLOPT\_IOCTLFUNCTION(3)](/CURLOPT_IOCTLFUNCTION/3.md)*. - CURLIOE\_FAILRESTART Introduced in 7.12.3. See *[CURLOPT\_IOCTLFUNCTION(3)](/CURLOPT_IOCTLFUNCTION/3.md)*. - CURLIOE\_OK Introduced in 7.12.3. See *[CURLOPT\_IOCTLFUNCTION(3)](/CURLOPT_IOCTLFUNCTION/3.md)*. - CURLIOE\_UNKNOWNCMD Introduced in 7.12.3. See *[CURLOPT\_IOCTLFUNCTION(3)](/CURLOPT_IOCTLFUNCTION/3.md)*. - CURLKHMATCH\_MISMATCH Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHMATCH\_MISSING Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHMATCH\_OK Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHSTAT\_DEFER Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHSTAT\_FINE Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHSTAT\_FINE\_ADD\_TO\_FILE Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHSTAT\_FINE\_REPLACE Introduced in 7.73.0. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHSTAT\_REJECT Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHTYPE\_DSS Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHTYPE\_ECDSA Introduced in 7.58.0. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHTYPE\_ED25519 Introduced in 7.58.0. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHTYPE\_RSA Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHTYPE\_RSA1 Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLKHTYPE\_UNKNOWN Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLM\_ABORTED\_BY\_CALLBACK Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_ADDED\_ALREADY Introduced in 7.33.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_BAD\_EASY\_HANDLE Introduced in 7.9.6. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_BAD\_FUNCTION\_ARGUMENT Introduced in 7.69.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_BAD\_HANDLE Introduced in 7.9.6. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_BAD\_SOCKET Introduced in 7.15.4. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_CALL\_MULTI\_PERFORM Introduced in 7.9.6. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_CALL\_MULTI\_SOCKET Introduced in 7.15.5. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_INTERNAL\_ERROR Introduced in 7.9.6. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_OK Introduced in 7.9.6. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_OUT\_OF\_MEMORY Introduced in 7.9.6. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_RECURSIVE\_API\_CALL Introduced in 7.59.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_UNKNOWN\_OPTION Introduced in 7.15.4. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_UNRECOVERABLE\_POLL Introduced in 7.84.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLM\_WAKEUP\_FAILURE Introduced in 7.68.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLMIMEOPT\_FORMESCAPE Introduced in 7.81.0. See *[CURLOPT\_MIME\_OPTIONS(3)](/CURLOPT_MIME_OPTIONS/3.md)*. - CURLMINFO\_NONE Introduced in 8.16.0. - CURLMINFO\_XFERS\_ADDED Introduced in 8.16.0. - CURLMINFO\_XFERS\_CURRENT Introduced in 8.16.0. - CURLMINFO\_XFERS\_DONE Introduced in 8.16.0. - CURLMINFO\_XFERS\_PENDING Introduced in 8.16.0. - CURLMINFO\_XFERS\_RUNNING Introduced in 8.16.0. - CURLMNOTIFY\_EASY\_DONE Introduced in 8.17.0. - CURLMNOTIFY\_INFO\_READ Introduced in 8.17.0. - CURLMNWC\_CLEAR\_ALL Introduced in 8.20.0. - CURLMNWC\_CLEAR\_CONNS Introduced in 8.16.0. - CURLMNWC\_CLEAR\_DNS Introduced in 8.16.0. - CURLMOPT\_CHUNK\_LENGTH\_PENALTY\_SIZE Introduced in 7.30.0. See *[CURLMOPT\_CHUNK\_LENGTH\_PENALTY\_SIZE(3)](/CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE/3.md)*. - CURLMOPT\_CONTENT\_LENGTH\_PENALTY\_SIZE Introduced in 7.30.0. See *[CURLMOPT\_CONTENT\_LENGTH\_PENALTY\_SIZE(3)](/CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE/3.md)*. - CURLMOPT\_MAX\_CONCURRENT\_STREAMS Introduced in 7.67.0. See *[CURLMOPT\_MAX\_CONCURRENT\_STREAMS(3)](/CURLMOPT_MAX_CONCURRENT_STREAMS/3.md)*. - CURLMOPT\_MAX\_HOST\_CONNECTIONS Introduced in 7.30.0. See *[CURLMOPT\_MAX\_HOST\_CONNECTIONS(3)](/CURLMOPT_MAX_HOST_CONNECTIONS/3.md)*. - CURLMOPT\_MAX\_PIPELINE\_LENGTH Introduced in 7.30.0. See *[CURLMOPT\_MAX\_PIPELINE\_LENGTH(3)](/CURLMOPT_MAX_PIPELINE_LENGTH/3.md)*. - CURLMOPT\_MAX\_TOTAL\_CONNECTIONS Introduced in 7.30.0. See *[CURLMOPT\_MAX\_TOTAL\_CONNECTIONS(3)](/CURLMOPT_MAX_TOTAL_CONNECTIONS/3.md)*. - CURLMOPT\_MAXCONNECTS Introduced in 7.16.3. See *[CURLMOPT\_MAXCONNECTS(3)](/CURLMOPT_MAXCONNECTS/3.md)*. - CURLMOPT\_NETWORK\_CHANGED Introduced in 8.16.0. See *[CURLMOPT\_NETWORK\_CHANGED(3)](/CURLMOPT_NETWORK_CHANGED/3.md)*. - CURLMOPT\_NOTIFYDATA Introduced in 8.17.0. See *[CURLMOPT\_NOTIFYDATA(3)](/CURLMOPT_NOTIFYDATA/3.md)*. - CURLMOPT\_NOTIFYFUNCTION Introduced in 8.17.0. See *[CURLMOPT\_NOTIFYFUNCTION(3)](/CURLMOPT_NOTIFYFUNCTION/3.md)*. - CURLMOPT\_PIPELINING Introduced in 7.16.0. See *[CURLMOPT\_PIPELINING(3)](/CURLMOPT_PIPELINING/3.md)*. - CURLMOPT\_PIPELINING\_SERVER\_BL Introduced in 7.30.0. See *[CURLMOPT\_PIPELINING\_SERVER\_BL(3)](/CURLMOPT_PIPELINING_SERVER_BL/3.md)*. - CURLMOPT\_PIPELINING\_SITE\_BL Introduced in 7.30.0. See *[CURLMOPT\_PIPELINING\_SITE\_BL(3)](/CURLMOPT_PIPELINING_SITE_BL/3.md)*. - CURLMOPT\_PUSHDATA Introduced in 7.44.0. See *[CURLMOPT\_PUSHDATA(3)](/CURLMOPT_PUSHDATA/3.md)*. - CURLMOPT\_PUSHFUNCTION Introduced in 7.44.0. See *[CURLMOPT\_PUSHFUNCTION(3)](/CURLMOPT_PUSHFUNCTION/3.md)*. - CURLMOPT\_QUICK\_EXIT Introduced in 8.20.0. See *[CURLMOPT\_QUICK\_EXIT(3)](/CURLMOPT_QUICK_EXIT/3.md)*. - CURLMOPT\_RESOLVE\_THREADS\_MAX Introduced in 8.20.0. See *[CURLMOPT\_RESOLVE\_THREADS\_MAX(3)](/CURLMOPT_RESOLVE_THREADS_MAX/3.md)*. - CURLMOPT\_SOCKETDATA Introduced in 7.15.4. See *[CURLMOPT\_SOCKETDATA(3)](/CURLMOPT_SOCKETDATA/3.md)*. - CURLMOPT\_SOCKETFUNCTION Introduced in 7.15.4. See *[CURLMOPT\_SOCKETFUNCTION(3)](/CURLMOPT_SOCKETFUNCTION/3.md)*. - CURLMOPT\_TIMERDATA Introduced in 7.16.0. See *[CURLMOPT\_TIMERDATA(3)](/CURLMOPT_TIMERDATA/3.md)*. - CURLMOPT\_TIMERFUNCTION Introduced in 7.16.0. See *[CURLMOPT\_TIMERFUNCTION(3)](/CURLMOPT_TIMERFUNCTION/3.md)*. - CURLMSG\_DONE Introduced in 7.9.6. See *[curl\_multi\_info\_read(3)](/curl_multi_info_read/3.md)*. - CURLMSG\_NONE Introduced in 7.9.6. See *[curl\_multi\_info\_read(3)](/curl_multi_info_read/3.md)*. - CURLOPT Introduced in 7.69.0. - CURLOPT\_ABSTRACT\_UNIX\_SOCKET Introduced in 7.53.0. See *[CURLOPT\_ABSTRACT\_UNIX\_SOCKET(3)](/CURLOPT_ABSTRACT_UNIX_SOCKET/3.md)*. - CURLOPT\_ACCEPT\_ENCODING Introduced in 7.21.6. See *[CURLOPT\_ACCEPT\_ENCODING(3)](/CURLOPT_ACCEPT_ENCODING/3.md)*. - CURLOPT\_ACCEPTTIMEOUT\_MS Introduced in 7.24.0. See *[CURLOPT\_ACCEPTTIMEOUT\_MS(3)](/CURLOPT_ACCEPTTIMEOUT_MS/3.md)*. - CURLOPT\_ADDRESS\_SCOPE Introduced in 7.19.0. See *[CURLOPT\_ADDRESS\_SCOPE(3)](/CURLOPT_ADDRESS_SCOPE/3.md)*. - CURLOPT\_ALTSVC Introduced in 7.64.1. See *[CURLOPT\_ALTSVC(3)](/CURLOPT_ALTSVC/3.md)*. - CURLOPT\_ALTSVC\_CTRL Introduced in 7.64.1. See *[CURLOPT\_ALTSVC\_CTRL(3)](/CURLOPT_ALTSVC_CTRL/3.md)*. - CURLOPT\_APPEND Introduced in 7.17.0. See *[CURLOPT\_APPEND(3)](/CURLOPT_APPEND/3.md)*. - CURLOPT\_AUTOREFERER Introduced in 7.1. See *[CURLOPT\_AUTOREFERER(3)](/CURLOPT_AUTOREFERER/3.md)*. - CURLOPT\_AWS\_SIGV4 Introduced in 7.75.0. See *[CURLOPT\_AWS\_SIGV4(3)](/CURLOPT_AWS_SIGV4/3.md)*. - CURLOPT\_BUFFERSIZE Introduced in 7.10. See *[CURLOPT\_BUFFERSIZE(3)](/CURLOPT_BUFFERSIZE/3.md)*. - CURLOPT\_CA\_CACHE\_TIMEOUT Introduced in 7.87.0. See *[CURLOPT\_CA\_CACHE\_TIMEOUT(3)](/CURLOPT_CA_CACHE_TIMEOUT/3.md)*. - CURLOPT\_CAINFO Introduced in 7.4.2. See *[CURLOPT\_CAINFO(3)](/CURLOPT_CAINFO/3.md)*. - CURLOPT\_CAINFO\_BLOB Introduced in 7.77.0. See *[CURLOPT\_CAINFO\_BLOB(3)](/CURLOPT_CAINFO_BLOB/3.md)*. - CURLOPT\_CAPATH Introduced in 7.9.8. See *[CURLOPT\_CAPATH(3)](/CURLOPT_CAPATH/3.md)*. - CURLOPT\_CERTINFO Introduced in 7.19.1. See *[CURLOPT\_CERTINFO(3)](/CURLOPT_CERTINFO/3.md)*. - CURLOPT\_CHUNK\_BGN\_FUNCTION Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_BGN\_FUNCTION(3)](/CURLOPT_CHUNK_BGN_FUNCTION/3.md)*. - CURLOPT\_CHUNK\_DATA Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_DATA(3)](/CURLOPT_CHUNK_DATA/3.md)*. - CURLOPT\_CHUNK\_END\_FUNCTION Introduced in 7.21.0. See *[CURLOPT\_CHUNK\_END\_FUNCTION(3)](/CURLOPT_CHUNK_END_FUNCTION/3.md)*. - CURLOPT\_CLOSEFUNCTION Introduced in 7.7. Deprecated since 7.11.1. - CURLOPT\_CLOSEPOLICY Introduced in 7.7. Deprecated since 7.16.1. - CURLOPT\_CLOSESOCKETDATA Introduced in 7.21.7. See *[CURLOPT\_CLOSESOCKETDATA(3)](/CURLOPT_CLOSESOCKETDATA/3.md)*. - CURLOPT\_CLOSESOCKETFUNCTION Introduced in 7.21.7. See *[CURLOPT\_CLOSESOCKETFUNCTION(3)](/CURLOPT_CLOSESOCKETFUNCTION/3.md)*. - CURLOPT\_CONNECT\_ONLY Introduced in 7.15.2. See *[CURLOPT\_CONNECT\_ONLY(3)](/CURLOPT_CONNECT_ONLY/3.md)*. - CURLOPT\_CONNECT\_TO Introduced in 7.49.0. See *[CURLOPT\_CONNECT\_TO(3)](/CURLOPT_CONNECT_TO/3.md)*. - CURLOPT\_CONNECTTIMEOUT Introduced in 7.7. See *[CURLOPT\_CONNECTTIMEOUT(3)](/CURLOPT_CONNECTTIMEOUT/3.md)*. - CURLOPT\_CONNECTTIMEOUT\_MS Introduced in 7.16.2. See *[CURLOPT\_CONNECTTIMEOUT\_MS(3)](/CURLOPT_CONNECTTIMEOUT_MS/3.md)*. - CURLOPT\_CONV\_FROM\_NETWORK\_FUNCTION Introduced in 7.15.4. Deprecated since 7.82.0. - CURLOPT\_CONV\_FROM\_UTF8\_FUNCTION Introduced in 7.15.4. Deprecated since 7.82.0. - CURLOPT\_CONV\_TO\_NETWORK\_FUNCTION Introduced in 7.15.4. Deprecated since 7.82.0. - CURLOPT\_COOKIE Introduced in 7.1. See *[CURLOPT\_COOKIE(3)](/CURLOPT_COOKIE/3.md)*. - CURLOPT\_COOKIEFILE Introduced in 7.1. See *[CURLOPT\_COOKIEFILE(3)](/CURLOPT_COOKIEFILE/3.md)*. - CURLOPT\_COOKIEJAR Introduced in 7.9. See *[CURLOPT\_COOKIEJAR(3)](/CURLOPT_COOKIEJAR/3.md)*. - CURLOPT\_COOKIELIST Introduced in 7.14.1. See *[CURLOPT\_COOKIELIST(3)](/CURLOPT_COOKIELIST/3.md)*. - CURLOPT\_COOKIESESSION Introduced in 7.9.7. See *[CURLOPT\_COOKIESESSION(3)](/CURLOPT_COOKIESESSION/3.md)*. - CURLOPT\_COPYPOSTFIELDS Introduced in 7.17.1. See *[CURLOPT\_COPYPOSTFIELDS(3)](/CURLOPT_COPYPOSTFIELDS/3.md)*. - CURLOPT\_CRLF Introduced in 7.1. See *[CURLOPT\_CRLF(3)](/CURLOPT_CRLF/3.md)*. - CURLOPT\_CRLFILE Introduced in 7.19.0. See *[CURLOPT\_CRLFILE(3)](/CURLOPT_CRLFILE/3.md)*. - CURLOPT\_CURLU Introduced in 7.63.0. See *[CURLOPT\_CURLU(3)](/CURLOPT_CURLU/3.md)*. - CURLOPT\_CUSTOMREQUEST Introduced in 7.1. See *[CURLOPT\_CUSTOMREQUEST(3)](/CURLOPT_CUSTOMREQUEST/3.md)*. - CURLOPT\_DEBUGDATA Introduced in 7.9.6. See *[CURLOPT\_DEBUGDATA(3)](/CURLOPT_DEBUGDATA/3.md)*. - CURLOPT\_DEBUGFUNCTION Introduced in 7.9.6. See *[CURLOPT\_DEBUGFUNCTION(3)](/CURLOPT_DEBUGFUNCTION/3.md)*. - CURLOPT\_DEFAULT\_PROTOCOL Introduced in 7.45.0. See *[CURLOPT\_DEFAULT\_PROTOCOL(3)](/CURLOPT_DEFAULT_PROTOCOL/3.md)*. - CURLOPT\_DIRLISTONLY Introduced in 7.17.0. See *[CURLOPT\_DIRLISTONLY(3)](/CURLOPT_DIRLISTONLY/3.md)*. - CURLOPT\_DISALLOW\_USERNAME\_IN\_URL Introduced in 7.61.0. See *[CURLOPT\_DISALLOW\_USERNAME\_IN\_URL(3)](/CURLOPT_DISALLOW_USERNAME_IN_URL/3.md)*. - CURLOPT\_DNS\_CACHE\_TIMEOUT Introduced in 7.9.3. See *[CURLOPT\_DNS\_CACHE\_TIMEOUT(3)](/CURLOPT_DNS_CACHE_TIMEOUT/3.md)*. - CURLOPT\_DNS\_INTERFACE Introduced in 7.33.0. See *[CURLOPT\_DNS\_INTERFACE(3)](/CURLOPT_DNS_INTERFACE/3.md)*. - CURLOPT\_DNS\_LOCAL\_IP4 Introduced in 7.33.0. See *[CURLOPT\_DNS\_LOCAL\_IP4(3)](/CURLOPT_DNS_LOCAL_IP4/3.md)*. - CURLOPT\_DNS\_LOCAL\_IP6 Introduced in 7.33.0. See *[CURLOPT\_DNS\_LOCAL\_IP6(3)](/CURLOPT_DNS_LOCAL_IP6/3.md)*. - CURLOPT\_DNS\_SERVERS Introduced in 7.24.0. See *[CURLOPT\_DNS\_SERVERS(3)](/CURLOPT_DNS_SERVERS/3.md)*. - CURLOPT\_DNS\_SHUFFLE\_ADDRESSES Introduced in 7.60.0. See *[CURLOPT\_DNS\_SHUFFLE\_ADDRESSES(3)](/CURLOPT_DNS_SHUFFLE_ADDRESSES/3.md)*. - CURLOPT\_DNS\_USE\_GLOBAL\_CACHE Introduced in 7.9.3. Deprecated since 7.11.1. - CURLOPT\_DOH\_SSL\_VERIFYHOST Introduced in 7.76.0. See *[CURLOPT\_DOH\_SSL\_VERIFYHOST(3)](/CURLOPT_DOH_SSL_VERIFYHOST/3.md)*. - CURLOPT\_DOH\_SSL\_VERIFYPEER Introduced in 7.76.0. See *[CURLOPT\_DOH\_SSL\_VERIFYPEER(3)](/CURLOPT_DOH_SSL_VERIFYPEER/3.md)*. - CURLOPT\_DOH\_SSL\_VERIFYSTATUS Introduced in 7.76.0. See *[CURLOPT\_DOH\_SSL\_VERIFYSTATUS(3)](/CURLOPT_DOH_SSL_VERIFYSTATUS/3.md)*. - CURLOPT\_DOH\_URL Introduced in 7.62.0. See *[CURLOPT\_DOH\_URL(3)](/CURLOPT_DOH_URL/3.md)*. - CURLOPT\_ECH Introduced in 8.8.0. See *[CURLOPT\_ECH(3)](/CURLOPT_ECH/3.md)*. - CURLOPT\_EGDSOCKET Introduced in 7.7. Deprecated since 7.84.0. - CURLOPT\_ENCODING Introduced in 7.10. Deprecated since 7.21.6. - CURLOPT\_ERRORBUFFER Introduced in 7.1. See *[CURLOPT\_ERRORBUFFER(3)](/CURLOPT_ERRORBUFFER/3.md)*. - CURLOPT\_EXPECT\_100\_TIMEOUT\_MS Introduced in 7.36.0. See *[CURLOPT\_EXPECT\_100\_TIMEOUT\_MS(3)](/CURLOPT_EXPECT_100_TIMEOUT_MS/3.md)*. - CURLOPT\_FAILONERROR Introduced in 7.1. See *[CURLOPT\_FAILONERROR(3)](/CURLOPT_FAILONERROR/3.md)*. - CURLOPT\_FILE Introduced in 7.1. Deprecated since 7.9.7. - CURLOPT\_FILETIME Introduced in 7.5. See *[CURLOPT\_FILETIME(3)](/CURLOPT_FILETIME/3.md)*. - CURLOPT\_FNMATCH\_DATA Introduced in 7.21.0. See *[CURLOPT\_FNMATCH\_DATA(3)](/CURLOPT_FNMATCH_DATA/3.md)*. - CURLOPT\_FNMATCH\_FUNCTION Introduced in 7.21.0. See *[CURLOPT\_FNMATCH\_FUNCTION(3)](/CURLOPT_FNMATCH_FUNCTION/3.md)*. - CURLOPT\_FOLLOWLOCATION Introduced in 7.1. See *[CURLOPT\_FOLLOWLOCATION(3)](/CURLOPT_FOLLOWLOCATION/3.md)*. - CURLOPT\_FORBID\_REUSE Introduced in 7.7. See *[CURLOPT\_FORBID\_REUSE(3)](/CURLOPT_FORBID_REUSE/3.md)*. - CURLOPT\_FRESH\_CONNECT Introduced in 7.7. See *[CURLOPT\_FRESH\_CONNECT(3)](/CURLOPT_FRESH_CONNECT/3.md)*. - CURLOPT\_FTP\_ACCOUNT Introduced in 7.13.0. See *[CURLOPT\_FTP\_ACCOUNT(3)](/CURLOPT_FTP_ACCOUNT/3.md)*. - CURLOPT\_FTP\_ALTERNATIVE\_TO\_USER Introduced in 7.15.5. See *[CURLOPT\_FTP\_ALTERNATIVE\_TO\_USER(3)](/CURLOPT_FTP_ALTERNATIVE_TO_USER/3.md)*. - CURLOPT\_FTP\_CREATE\_MISSING\_DIRS Introduced in 7.10.7. See *[CURLOPT\_FTP\_CREATE\_MISSING\_DIRS(3)](/CURLOPT_FTP_CREATE_MISSING_DIRS/3.md)*. - CURLOPT\_FTP\_FILEMETHOD Introduced in 7.15.1. See *[CURLOPT\_FTP\_FILEMETHOD(3)](/CURLOPT_FTP_FILEMETHOD/3.md)*. - CURLOPT\_FTP\_RESPONSE\_TIMEOUT Introduced in 7.10.8. Deprecated since 7.85.0. - CURLOPT\_FTP\_SKIP\_PASV\_IP Introduced in 7.15.0. See *[CURLOPT\_FTP\_SKIP\_PASV\_IP(3)](/CURLOPT_FTP_SKIP_PASV_IP/3.md)*. - CURLOPT\_FTP\_SSL Introduced in 7.11.0. Deprecated since 7.16.4. - CURLOPT\_FTP\_SSL\_CCC Introduced in 7.16.1. See *[CURLOPT\_FTP\_SSL\_CCC(3)](/CURLOPT_FTP_SSL_CCC/3.md)*. - CURLOPT\_FTP\_USE\_EPRT Introduced in 7.10.5. See *[CURLOPT\_FTP\_USE\_EPRT(3)](/CURLOPT_FTP_USE_EPRT/3.md)*. - CURLOPT\_FTP\_USE\_EPSV Introduced in 7.9.2. See *[CURLOPT\_FTP\_USE\_EPSV(3)](/CURLOPT_FTP_USE_EPSV/3.md)*. - CURLOPT\_FTP\_USE\_PRET Introduced in 7.20.0. See *[CURLOPT\_FTP\_USE\_PRET(3)](/CURLOPT_FTP_USE_PRET/3.md)*. - CURLOPT\_FTPAPPEND Introduced in 7.1. Deprecated since 7.16.4. - CURLOPT\_FTPASCII Introduced in 7.1. Deprecated since 7.11.1. - CURLOPT\_FTPLISTONLY Introduced in 7.1. Deprecated since 7.16.4. - CURLOPT\_FTPPORT Introduced in 7.1. See *[CURLOPT\_FTPPORT(3)](/CURLOPT_FTPPORT/3.md)*. - CURLOPT\_FTPSSLAUTH Introduced in 7.12.2. See *[CURLOPT\_FTPSSLAUTH(3)](/CURLOPT_FTPSSLAUTH/3.md)*. - CURLOPT\_GSSAPI\_DELEGATION Introduced in 7.22.0. See *[CURLOPT\_GSSAPI\_DELEGATION(3)](/CURLOPT_GSSAPI_DELEGATION/3.md)*. - CURLOPT\_HAPPY\_EYEBALLS\_TIMEOUT\_MS Introduced in 7.59.0. See *[CURLOPT\_HAPPY\_EYEBALLS\_TIMEOUT\_MS(3)](/CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS/3.md)*. - CURLOPT\_HAPROXY\_CLIENT\_IP Introduced in 8.2.0. See *[CURLOPT\_HAPROXY\_CLIENT\_IP(3)](/CURLOPT_HAPROXY_CLIENT_IP/3.md)*. - CURLOPT\_HAPROXYPROTOCOL Introduced in 7.60.0. See *[CURLOPT\_HAPROXYPROTOCOL(3)](/CURLOPT_HAPROXYPROTOCOL/3.md)*. - CURLOPT\_HEADER Introduced in 7.1. See *[CURLOPT\_HEADER(3)](/CURLOPT_HEADER/3.md)*. - CURLOPT\_HEADERDATA Introduced in 7.10. See *[CURLOPT\_HEADERDATA(3)](/CURLOPT_HEADERDATA/3.md)*. - CURLOPT\_HEADERFUNCTION Introduced in 7.7.2. See *[CURLOPT\_HEADERFUNCTION(3)](/CURLOPT_HEADERFUNCTION/3.md)*. - CURLOPT\_HEADEROPT Introduced in 7.37.0. See *[CURLOPT\_HEADEROPT(3)](/CURLOPT_HEADEROPT/3.md)*. - CURLOPT\_HSTS Introduced in 7.74.0. See *[CURLOPT\_HSTS(3)](/CURLOPT_HSTS/3.md)*. - CURLOPT\_HSTS\_CTRL Introduced in 7.74.0. See *[CURLOPT\_HSTS\_CTRL(3)](/CURLOPT_HSTS_CTRL/3.md)*. - CURLOPT\_HSTSREADDATA Introduced in 7.74.0. See *[CURLOPT\_HSTSREADDATA(3)](/CURLOPT_HSTSREADDATA/3.md)*. - CURLOPT\_HSTSREADFUNCTION Introduced in 7.74.0. See *[CURLOPT\_HSTSREADFUNCTION(3)](/CURLOPT_HSTSREADFUNCTION/3.md)*. - CURLOPT\_HSTSWRITEDATA Introduced in 7.74.0. See *[CURLOPT\_HSTSWRITEDATA(3)](/CURLOPT_HSTSWRITEDATA/3.md)*. - CURLOPT\_HSTSWRITEFUNCTION Introduced in 7.74.0. See *[CURLOPT\_HSTSWRITEFUNCTION(3)](/CURLOPT_HSTSWRITEFUNCTION/3.md)*. - CURLOPT\_HTTP09\_ALLOWED Introduced in 7.64.0. See *[CURLOPT\_HTTP09\_ALLOWED(3)](/CURLOPT_HTTP09_ALLOWED/3.md)*. - CURLOPT\_HTTP200ALIASES Introduced in 7.10.3. See *[CURLOPT\_HTTP200ALIASES(3)](/CURLOPT_HTTP200ALIASES/3.md)*. - CURLOPT\_HTTP\_CONTENT\_DECODING Introduced in 7.16.2. See *[CURLOPT\_HTTP\_CONTENT\_DECODING(3)](/CURLOPT_HTTP_CONTENT_DECODING/3.md)*. - CURLOPT\_HTTP\_TRANSFER\_DECODING Introduced in 7.16.2. See *[CURLOPT\_HTTP\_TRANSFER\_DECODING(3)](/CURLOPT_HTTP_TRANSFER_DECODING/3.md)*. - CURLOPT\_HTTP\_VERSION Introduced in 7.9.1. See *[CURLOPT\_HTTP\_VERSION(3)](/CURLOPT_HTTP_VERSION/3.md)*. - CURLOPT\_HTTPAUTH Introduced in 7.10.6. See *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*. - CURLOPT\_HTTPGET Introduced in 7.8.1. See *[CURLOPT\_HTTPGET(3)](/CURLOPT_HTTPGET/3.md)*. - CURLOPT\_HTTPHEADER Introduced in 7.1. See *[CURLOPT\_HTTPHEADER(3)](/CURLOPT_HTTPHEADER/3.md)*. - CURLOPT\_HTTPPOST Introduced in 7.1. Deprecated since 7.56.0. - CURLOPT\_HTTPPROXYTUNNEL Introduced in 7.3. See *[CURLOPT\_HTTPPROXYTUNNEL(3)](/CURLOPT_HTTPPROXYTUNNEL/3.md)*. - CURLOPT\_HTTPREQUEST Introduced in 7.1. Last used in 7.15.5. - CURLOPT\_HTTPSIG\_ALGORITHM Introduced in 8.22.0. See *[CURLOPT\_HTTPSIG\_ALGORITHM(3)](/CURLOPT_HTTPSIG_ALGORITHM/3.md)*. - CURLOPT\_HTTPSIG\_HEADERS Introduced in 8.22.0. See *[CURLOPT\_HTTPSIG\_HEADERS(3)](/CURLOPT_HTTPSIG_HEADERS/3.md)*. - CURLOPT\_HTTPSIG\_KEY Introduced in 8.22.0. See *[CURLOPT\_HTTPSIG\_KEY(3)](/CURLOPT_HTTPSIG_KEY/3.md)*. - CURLOPT\_HTTPSIG\_KEYID Introduced in 8.22.0. See *[CURLOPT\_HTTPSIG\_KEYID(3)](/CURLOPT_HTTPSIG_KEYID/3.md)*. - CURLOPT\_IGNORE\_CONTENT\_LENGTH Introduced in 7.14.1. See *[CURLOPT\_IGNORE\_CONTENT\_LENGTH(3)](/CURLOPT_IGNORE_CONTENT_LENGTH/3.md)*. - CURLOPT\_INFILE Introduced in 7.1. Deprecated since 7.9.7. - CURLOPT\_INFILESIZE Introduced in 7.1. See *[CURLOPT\_INFILESIZE(3)](/CURLOPT_INFILESIZE/3.md)*. - CURLOPT\_INFILESIZE\_LARGE Introduced in 7.11.0. See *[CURLOPT\_INFILESIZE\_LARGE(3)](/CURLOPT_INFILESIZE_LARGE/3.md)*. - CURLOPT\_INTERFACE Introduced in 7.3. See *[CURLOPT\_INTERFACE(3)](/CURLOPT_INTERFACE/3.md)*. - CURLOPT\_INTERLEAVEDATA Introduced in 7.20.0. See *[CURLOPT\_INTERLEAVEDATA(3)](/CURLOPT_INTERLEAVEDATA/3.md)*. - CURLOPT\_INTERLEAVEFUNCTION Introduced in 7.20.0. See *[CURLOPT\_INTERLEAVEFUNCTION(3)](/CURLOPT_INTERLEAVEFUNCTION/3.md)*. - CURLOPT\_IOCTLDATA Introduced in 7.12.3. Deprecated since 7.18.0. - CURLOPT\_IOCTLFUNCTION Introduced in 7.12.3. Deprecated since 7.18.0. - CURLOPT\_IPRESOLVE Introduced in 7.10.8. See *[CURLOPT\_IPRESOLVE(3)](/CURLOPT_IPRESOLVE/3.md)*. - CURLOPT\_ISSUERCERT Introduced in 7.19.0. See *[CURLOPT\_ISSUERCERT(3)](/CURLOPT_ISSUERCERT/3.md)*. - CURLOPT\_ISSUERCERT\_BLOB Introduced in 7.71.0. See *[CURLOPT\_ISSUERCERT\_BLOB(3)](/CURLOPT_ISSUERCERT_BLOB/3.md)*. - CURLOPT\_KEEP\_SENDING\_ON\_ERROR Introduced in 7.51.0. See *[CURLOPT\_KEEP\_SENDING\_ON\_ERROR(3)](/CURLOPT_KEEP_SENDING_ON_ERROR/3.md)*. - CURLOPT\_KEYPASSWD Introduced in 7.17.0. See *[CURLOPT\_KEYPASSWD(3)](/CURLOPT_KEYPASSWD/3.md)*. - CURLOPT\_KRB4LEVEL Introduced in 7.3. Deprecated since 7.17.0. - CURLOPT\_KRBLEVEL Introduced in 7.16.4. Deprecated since 8.17.0. - CURLOPT\_LOCALPORT Introduced in 7.15.2. See *[CURLOPT\_LOCALPORT(3)](/CURLOPT_LOCALPORT/3.md)*. - CURLOPT\_LOCALPORTRANGE Introduced in 7.15.2. See *[CURLOPT\_LOCALPORTRANGE(3)](/CURLOPT_LOCALPORTRANGE/3.md)*. - CURLOPT\_LOGIN\_OPTIONS Introduced in 7.34.0. See *[CURLOPT\_LOGIN\_OPTIONS(3)](/CURLOPT_LOGIN_OPTIONS/3.md)*. - CURLOPT\_LOW\_SPEED\_LIMIT Introduced in 7.1. See *[CURLOPT\_LOW\_SPEED\_LIMIT(3)](/CURLOPT_LOW_SPEED_LIMIT/3.md)*. - CURLOPT\_LOW\_SPEED\_TIME Introduced in 7.1. See *[CURLOPT\_LOW\_SPEED\_TIME(3)](/CURLOPT_LOW_SPEED_TIME/3.md)*. - CURLOPT\_MAIL\_AUTH Introduced in 7.25.0. See *[CURLOPT\_MAIL\_AUTH(3)](/CURLOPT_MAIL_AUTH/3.md)*. - CURLOPT\_MAIL\_FROM Introduced in 7.20.0. See *[CURLOPT\_MAIL\_FROM(3)](/CURLOPT_MAIL_FROM/3.md)*. - CURLOPT\_MAIL\_RCPT Introduced in 7.20.0. See *[CURLOPT\_MAIL\_RCPT(3)](/CURLOPT_MAIL_RCPT/3.md)*. - CURLOPT\_MAIL\_RCPT\_ALLLOWFAILS Introduced in 7.69.0. Deprecated since 8.2.0. - CURLOPT\_MAIL\_RCPT\_ALLOWFAILS Introduced in 8.2.0. See *[CURLOPT\_MAIL\_RCPT\_ALLOWFAILS(3)](/CURLOPT_MAIL_RCPT_ALLOWFAILS/3.md)*. - CURLOPT\_MAX\_RECV\_SPEED\_LARGE Introduced in 7.15.5. See *[CURLOPT\_MAX\_RECV\_SPEED\_LARGE(3)](/CURLOPT_MAX_RECV_SPEED_LARGE/3.md)*. - CURLOPT\_MAX\_SEND\_SPEED\_LARGE Introduced in 7.15.5. See *[CURLOPT\_MAX\_SEND\_SPEED\_LARGE(3)](/CURLOPT_MAX_SEND_SPEED_LARGE/3.md)*. - CURLOPT\_MAXAGE\_CONN Introduced in 7.65.0. See *[CURLOPT\_MAXAGE\_CONN(3)](/CURLOPT_MAXAGE_CONN/3.md)*. - CURLOPT\_MAXCONNECTS Introduced in 7.7. See *[CURLOPT\_MAXCONNECTS(3)](/CURLOPT_MAXCONNECTS/3.md)*. - CURLOPT\_MAXFILESIZE Introduced in 7.10.8. See *[CURLOPT\_MAXFILESIZE(3)](/CURLOPT_MAXFILESIZE/3.md)*. - CURLOPT\_MAXFILESIZE\_LARGE Introduced in 7.11.0. See *[CURLOPT\_MAXFILESIZE\_LARGE(3)](/CURLOPT_MAXFILESIZE_LARGE/3.md)*. - CURLOPT\_MAXLIFETIME\_CONN Introduced in 7.80.0. See *[CURLOPT\_MAXLIFETIME\_CONN(3)](/CURLOPT_MAXLIFETIME_CONN/3.md)*. - CURLOPT\_MAXREDIRS Introduced in 7.5. See *[CURLOPT\_MAXREDIRS(3)](/CURLOPT_MAXREDIRS/3.md)*. - CURLOPT\_MIME\_OPTIONS Introduced in 7.81.0. See *[CURLOPT\_MIME\_OPTIONS(3)](/CURLOPT_MIME_OPTIONS/3.md)*. - CURLOPT\_MIMEPOST Introduced in 7.56.0. See *[CURLOPT\_MIMEPOST(3)](/CURLOPT_MIMEPOST/3.md)*. - CURLOPT\_MUTE Introduced in 7.1. Deprecated since 7.8. - CURLOPT\_NETRC Introduced in 7.1. See *[CURLOPT\_NETRC(3)](/CURLOPT_NETRC/3.md)*. - CURLOPT\_NETRC\_FILE Introduced in 7.11.0. See *[CURLOPT\_NETRC\_FILE(3)](/CURLOPT_NETRC_FILE/3.md)*. - CURLOPT\_NEW\_DIRECTORY\_PERMS Introduced in 7.16.4. See *[CURLOPT\_NEW\_DIRECTORY\_PERMS(3)](/CURLOPT_NEW_DIRECTORY_PERMS/3.md)*. - CURLOPT\_NEW\_FILE\_PERMS Introduced in 7.16.4. See *[CURLOPT\_NEW\_FILE\_PERMS(3)](/CURLOPT_NEW_FILE_PERMS/3.md)*. - CURLOPT\_NOBODY Introduced in 7.1. See *[CURLOPT\_NOBODY(3)](/CURLOPT_NOBODY/3.md)*. - CURLOPT\_NOPROGRESS Introduced in 7.1. See *[CURLOPT\_NOPROGRESS(3)](/CURLOPT_NOPROGRESS/3.md)*. - CURLOPT\_NOPROXY Introduced in 7.19.4. See *[CURLOPT\_NOPROXY(3)](/CURLOPT_NOPROXY/3.md)*. - CURLOPT\_NOSIGNAL Introduced in 7.10. See *[CURLOPT\_NOSIGNAL(3)](/CURLOPT_NOSIGNAL/3.md)*. - CURLOPT\_NOTHING Introduced in 7.1.1. Deprecated since 7.11.1. - CURLOPT\_OPENSOCKETDATA Introduced in 7.17.1. See *[CURLOPT\_OPENSOCKETDATA(3)](/CURLOPT_OPENSOCKETDATA/3.md)*. - CURLOPT\_OPENSOCKETFUNCTION Introduced in 7.17.1. See *[CURLOPT\_OPENSOCKETFUNCTION(3)](/CURLOPT_OPENSOCKETFUNCTION/3.md)*. - CURLOPT\_PASSWDDATA Introduced in 7.4.2. Deprecated since 7.11.1. - CURLOPT\_PASSWDFUNCTION Introduced in 7.4.2. Deprecated since 7.11.1. - CURLOPT\_PASSWORD Introduced in 7.19.1. See *[CURLOPT\_PASSWORD(3)](/CURLOPT_PASSWORD/3.md)*. - CURLOPT\_PASV\_HOST Introduced in 7.12.1. Deprecated since 7.16.0. - CURLOPT\_PATH\_AS\_IS Introduced in 7.42.0. See *[CURLOPT\_PATH\_AS\_IS(3)](/CURLOPT_PATH_AS_IS/3.md)*. - CURLOPT\_PINNEDPUBLICKEY Introduced in 7.39.0. See *[CURLOPT\_PINNEDPUBLICKEY(3)](/CURLOPT_PINNEDPUBLICKEY/3.md)*. - CURLOPT\_PIPEWAIT Introduced in 7.43.0. See *[CURLOPT\_PIPEWAIT(3)](/CURLOPT_PIPEWAIT/3.md)*. - CURLOPT\_PORT Introduced in 7.1. See *[CURLOPT\_PORT(3)](/CURLOPT_PORT/3.md)*. - CURLOPT\_POST Introduced in 7.1. See *[CURLOPT\_POST(3)](/CURLOPT_POST/3.md)*. - CURLOPT\_POST301 Introduced in 7.17.1. Deprecated since 7.19.1. - CURLOPT\_POSTFIELDS Introduced in 7.1. See *[CURLOPT\_POSTFIELDS(3)](/CURLOPT_POSTFIELDS/3.md)*. - CURLOPT\_POSTFIELDSIZE Introduced in 7.2. See *[CURLOPT\_POSTFIELDSIZE(3)](/CURLOPT_POSTFIELDSIZE/3.md)*. - CURLOPT\_POSTFIELDSIZE\_LARGE Introduced in 7.11.1. See *[CURLOPT\_POSTFIELDSIZE\_LARGE(3)](/CURLOPT_POSTFIELDSIZE_LARGE/3.md)*. - CURLOPT\_POSTQUOTE Introduced in 7.1. See *[CURLOPT\_POSTQUOTE(3)](/CURLOPT_POSTQUOTE/3.md)*. - CURLOPT\_POSTREDIR Introduced in 7.19.1. See *[CURLOPT\_POSTREDIR(3)](/CURLOPT_POSTREDIR/3.md)*. - CURLOPT\_PRE\_PROXY Introduced in 7.52.0. See *[CURLOPT\_PRE\_PROXY(3)](/CURLOPT_PRE_PROXY/3.md)*. - CURLOPT\_PREQUOTE Introduced in 7.9.5. See *[CURLOPT\_PREQUOTE(3)](/CURLOPT_PREQUOTE/3.md)*. - CURLOPT\_PREREQDATA Introduced in 7.80.0. See *[CURLOPT\_PREREQDATA(3)](/CURLOPT_PREREQDATA/3.md)*. - CURLOPT\_PREREQFUNCTION Introduced in 7.80.0. See *[CURLOPT\_PREREQFUNCTION(3)](/CURLOPT_PREREQFUNCTION/3.md)*. - CURLOPT\_PRIVATE Introduced in 7.10.3. See *[CURLOPT\_PRIVATE(3)](/CURLOPT_PRIVATE/3.md)*. - CURLOPT\_PROGRESSDATA Introduced in 7.1. See *[CURLOPT\_PROGRESSDATA(3)](/CURLOPT_PROGRESSDATA/3.md)*. - CURLOPT\_PROGRESSFUNCTION Introduced in 7.1. Deprecated since 7.32.0. - CURLOPT\_PROTOCOLS Introduced in 7.19.4. Deprecated since 7.85.0. - CURLOPT\_PROTOCOLS\_STR Introduced in 7.85.0. See *[CURLOPT\_PROTOCOLS\_STR(3)](/CURLOPT_PROTOCOLS_STR/3.md)*. - CURLOPT\_PROXY Introduced in 7.1. See *[CURLOPT\_PROXY(3)](/CURLOPT_PROXY/3.md)*. - CURLOPT\_PROXY\_CAINFO Introduced in 7.52.0. See *[CURLOPT\_PROXY\_CAINFO(3)](/CURLOPT_PROXY_CAINFO/3.md)*. - CURLOPT\_PROXY\_CAINFO\_BLOB Introduced in 7.77.0. See *[CURLOPT\_PROXY\_CAINFO\_BLOB(3)](/CURLOPT_PROXY_CAINFO_BLOB/3.md)*. - CURLOPT\_PROXY\_CAPATH Introduced in 7.52.0. See *[CURLOPT\_PROXY\_CAPATH(3)](/CURLOPT_PROXY_CAPATH/3.md)*. - CURLOPT\_PROXY\_CRLFILE Introduced in 7.52.0. See *[CURLOPT\_PROXY\_CRLFILE(3)](/CURLOPT_PROXY_CRLFILE/3.md)*. - CURLOPT\_PROXY\_ISSUERCERT Introduced in 7.71.0. See *[CURLOPT\_PROXY\_ISSUERCERT(3)](/CURLOPT_PROXY_ISSUERCERT/3.md)*. - CURLOPT\_PROXY\_ISSUERCERT\_BLOB Introduced in 7.71.0. See *[CURLOPT\_PROXY\_ISSUERCERT\_BLOB(3)](/CURLOPT_PROXY_ISSUERCERT_BLOB/3.md)*. - CURLOPT\_PROXY\_KEYPASSWD Introduced in 7.52.0. See *[CURLOPT\_PROXY\_KEYPASSWD(3)](/CURLOPT_PROXY_KEYPASSWD/3.md)*. - CURLOPT\_PROXY\_PINNEDPUBLICKEY Introduced in 7.52.0. See *[CURLOPT\_PROXY\_PINNEDPUBLICKEY(3)](/CURLOPT_PROXY_PINNEDPUBLICKEY/3.md)*. - CURLOPT\_PROXY\_SERVICE\_NAME Introduced in 7.43.0. See *[CURLOPT\_PROXY\_SERVICE\_NAME(3)](/CURLOPT_PROXY_SERVICE_NAME/3.md)*. - CURLOPT\_PROXY\_SSL\_CIPHER\_LIST Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSL\_CIPHER\_LIST(3)](/CURLOPT_PROXY_SSL_CIPHER_LIST/3.md)*. - CURLOPT\_PROXY\_SSL\_OPTIONS Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSL\_OPTIONS(3)](/CURLOPT_PROXY_SSL_OPTIONS/3.md)*. - CURLOPT\_PROXY\_SSL\_VERIFYHOST Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSL\_VERIFYHOST(3)](/CURLOPT_PROXY_SSL_VERIFYHOST/3.md)*. - CURLOPT\_PROXY\_SSL\_VERIFYPEER Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSL\_VERIFYPEER(3)](/CURLOPT_PROXY_SSL_VERIFYPEER/3.md)*. - CURLOPT\_PROXY\_SSLCERT Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSLCERT(3)](/CURLOPT_PROXY_SSLCERT/3.md)*. - CURLOPT\_PROXY\_SSLCERT\_BLOB Introduced in 7.71.0. See *[CURLOPT\_PROXY\_SSLCERT\_BLOB(3)](/CURLOPT_PROXY_SSLCERT_BLOB/3.md)*. - CURLOPT\_PROXY\_SSLCERTTYPE Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSLCERTTYPE(3)](/CURLOPT_PROXY_SSLCERTTYPE/3.md)*. - CURLOPT\_PROXY\_SSLKEY Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSLKEY(3)](/CURLOPT_PROXY_SSLKEY/3.md)*. - CURLOPT\_PROXY\_SSLKEY\_BLOB Introduced in 7.71.0. See *[CURLOPT\_PROXY\_SSLKEY\_BLOB(3)](/CURLOPT_PROXY_SSLKEY_BLOB/3.md)*. - CURLOPT\_PROXY\_SSLKEYTYPE Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSLKEYTYPE(3)](/CURLOPT_PROXY_SSLKEYTYPE/3.md)*. - CURLOPT\_PROXY\_SSLVERSION Introduced in 7.52.0. See *[CURLOPT\_PROXY\_SSLVERSION(3)](/CURLOPT_PROXY_SSLVERSION/3.md)*. - CURLOPT\_PROXY\_TLS13\_CIPHERS Introduced in 7.61.0. See *[CURLOPT\_PROXY\_TLS13\_CIPHERS(3)](/CURLOPT_PROXY_TLS13_CIPHERS/3.md)*. - CURLOPT\_PROXY\_TLSAUTH\_PASSWORD Introduced in 7.52.0. Deprecated since 8.22.0. - CURLOPT\_PROXY\_TLSAUTH\_TYPE Introduced in 7.52.0. Deprecated since 8.22.0. - CURLOPT\_PROXY\_TLSAUTH\_USERNAME Introduced in 7.52.0. Deprecated since 8.22.0. - CURLOPT\_PROXY\_TRANSFER\_MODE Introduced in 7.18.0. See *[CURLOPT\_PROXY\_TRANSFER\_MODE(3)](/CURLOPT_PROXY_TRANSFER_MODE/3.md)*. - CURLOPT\_PROXYAUTH Introduced in 7.10.7. See *[CURLOPT\_PROXYAUTH(3)](/CURLOPT_PROXYAUTH/3.md)*. - CURLOPT\_PROXYHEADER Introduced in 7.37.0. See *[CURLOPT\_PROXYHEADER(3)](/CURLOPT_PROXYHEADER/3.md)*. - CURLOPT\_PROXYPASSWORD Introduced in 7.19.1. See *[CURLOPT\_PROXYPASSWORD(3)](/CURLOPT_PROXYPASSWORD/3.md)*. - CURLOPT\_PROXYPORT Introduced in 7.1. See *[CURLOPT\_PROXYPORT(3)](/CURLOPT_PROXYPORT/3.md)*. - CURLOPT\_PROXYTYPE Introduced in 7.10. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLOPT\_PROXYUSERNAME Introduced in 7.19.1. See *[CURLOPT\_PROXYUSERNAME(3)](/CURLOPT_PROXYUSERNAME/3.md)*. - CURLOPT\_PROXYUSERPWD Introduced in 7.1. See *[CURLOPT\_PROXYUSERPWD(3)](/CURLOPT_PROXYUSERPWD/3.md)*. - CURLOPT\_PUT Introduced in 7.1. Deprecated since 7.12.1. - CURLOPT\_QUICK\_EXIT Introduced in 7.87.0. See *[CURLOPT\_QUICK\_EXIT(3)](/CURLOPT_QUICK_EXIT/3.md)*. - CURLOPT\_QUOTE Introduced in 7.1. See *[CURLOPT\_QUOTE(3)](/CURLOPT_QUOTE/3.md)*. - CURLOPT\_RANDOM\_FILE Introduced in 7.7. Deprecated since 7.84.0. - CURLOPT\_RANGE Introduced in 7.1. See *[CURLOPT\_RANGE(3)](/CURLOPT_RANGE/3.md)*. - CURLOPT\_READDATA Introduced in 7.9.7. See *[CURLOPT\_READDATA(3)](/CURLOPT_READDATA/3.md)*. - CURLOPT\_READFUNCTION Introduced in 7.1. See *[CURLOPT\_READFUNCTION(3)](/CURLOPT_READFUNCTION/3.md)*. - CURLOPT\_REDIR\_PROTOCOLS Introduced in 7.19.4. Deprecated since 7.85.0. - CURLOPT\_REDIR\_PROTOCOLS\_STR Introduced in 7.85.0. See *[CURLOPT\_REDIR\_PROTOCOLS\_STR(3)](/CURLOPT_REDIR_PROTOCOLS_STR/3.md)*. - CURLOPT\_REFERER Introduced in 7.1. See *[CURLOPT\_REFERER(3)](/CURLOPT_REFERER/3.md)*. - CURLOPT\_REQUEST\_TARGET Introduced in 7.55.0. See *[CURLOPT\_REQUEST\_TARGET(3)](/CURLOPT_REQUEST_TARGET/3.md)*. - CURLOPT\_RESOLVE Introduced in 7.21.3. See *[CURLOPT\_RESOLVE(3)](/CURLOPT_RESOLVE/3.md)*. - CURLOPT\_RESOLVER\_START\_DATA Introduced in 7.59.0. See *[CURLOPT\_RESOLVER\_START\_DATA(3)](/CURLOPT_RESOLVER_START_DATA/3.md)*. - CURLOPT\_RESOLVER\_START\_FUNCTION Introduced in 7.59.0. See *[CURLOPT\_RESOLVER\_START\_FUNCTION(3)](/CURLOPT_RESOLVER_START_FUNCTION/3.md)*. - CURLOPT\_RESUME\_FROM Introduced in 7.1. See *[CURLOPT\_RESUME\_FROM(3)](/CURLOPT_RESUME_FROM/3.md)*. - CURLOPT\_RESUME\_FROM\_LARGE Introduced in 7.11.0. See *[CURLOPT\_RESUME\_FROM\_LARGE(3)](/CURLOPT_RESUME_FROM_LARGE/3.md)*. - CURLOPT\_RTSP\_CLIENT\_CSEQ Introduced in 7.20.0. See *[CURLOPT\_RTSP\_CLIENT\_CSEQ(3)](/CURLOPT_RTSP_CLIENT_CSEQ/3.md)*. - CURLOPT\_RTSP\_REQUEST Introduced in 7.20.0. See *[CURLOPT\_RTSP\_REQUEST(3)](/CURLOPT_RTSP_REQUEST/3.md)*. - CURLOPT\_RTSP\_SERVER\_CSEQ Introduced in 7.20.0. See *[CURLOPT\_RTSP\_SERVER\_CSEQ(3)](/CURLOPT_RTSP_SERVER_CSEQ/3.md)*. - CURLOPT\_RTSP\_SESSION\_ID Introduced in 7.20.0. See *[CURLOPT\_RTSP\_SESSION\_ID(3)](/CURLOPT_RTSP_SESSION_ID/3.md)*. - CURLOPT\_RTSP\_STREAM\_URI Introduced in 7.20.0. See *[CURLOPT\_RTSP\_STREAM\_URI(3)](/CURLOPT_RTSP_STREAM_URI/3.md)*. - CURLOPT\_RTSP\_TRANSPORT Introduced in 7.20.0. See *[CURLOPT\_RTSP\_TRANSPORT(3)](/CURLOPT_RTSP_TRANSPORT/3.md)*. - CURLOPT\_RTSPHEADER Introduced in 7.20.0. See CURLOPT\_HTTPHEADER. - CURLOPT\_SASL\_AUTHZID Introduced in 7.66.0. See *[CURLOPT\_SASL\_AUTHZID(3)](/CURLOPT_SASL_AUTHZID/3.md)*. - CURLOPT\_SASL\_IR Introduced in 7.31.0. See *[CURLOPT\_SASL\_IR(3)](/CURLOPT_SASL_IR/3.md)*. - CURLOPT\_SEEKDATA Introduced in 7.18.0. See *[CURLOPT\_SEEKDATA(3)](/CURLOPT_SEEKDATA/3.md)*. - CURLOPT\_SEEKFUNCTION Introduced in 7.18.0. See *[CURLOPT\_SEEKFUNCTION(3)](/CURLOPT_SEEKFUNCTION/3.md)*. - CURLOPT\_SERVER\_RESPONSE\_TIMEOUT Introduced in 7.20.0. See *[CURLOPT\_SERVER\_RESPONSE\_TIMEOUT(3)](/CURLOPT_SERVER_RESPONSE_TIMEOUT/3.md)*. - CURLOPT\_SERVER\_RESPONSE\_TIMEOUT\_MS Introduced in 8.6.0. See *[CURLOPT\_SERVER\_RESPONSE\_TIMEOUT\_MS(3)](/CURLOPT_SERVER_RESPONSE_TIMEOUT_MS/3.md)*. - CURLOPT\_SERVICE\_NAME Introduced in 7.43.0. See *[CURLOPT\_SERVICE\_NAME(3)](/CURLOPT_SERVICE_NAME/3.md)*. - CURLOPT\_SHARE Introduced in 7.10. See *[CURLOPT\_SHARE(3)](/CURLOPT_SHARE/3.md)*. - CURLOPT\_SOCKOPTDATA Introduced in 7.16.0. See *[CURLOPT\_SOCKOPTDATA(3)](/CURLOPT_SOCKOPTDATA/3.md)*. - CURLOPT\_SOCKOPTFUNCTION Introduced in 7.16.0. See *[CURLOPT\_SOCKOPTFUNCTION(3)](/CURLOPT_SOCKOPTFUNCTION/3.md)*. - CURLOPT\_SOCKS5\_AUTH Introduced in 7.55.0. See *[CURLOPT\_SOCKS5\_AUTH(3)](/CURLOPT_SOCKS5_AUTH/3.md)*. - CURLOPT\_SOCKS5\_GSSAPI\_NEC Introduced in 7.19.4. See *[CURLOPT\_SOCKS5\_GSSAPI\_NEC(3)](/CURLOPT_SOCKS5_GSSAPI_NEC/3.md)*. - CURLOPT\_SOCKS5\_GSSAPI\_SERVICE Introduced in 7.19.4. Deprecated since 7.49.0. - CURLOPT\_SOURCE\_HOST Introduced in 7.12.1. Last used in 7.15.5. - CURLOPT\_SOURCE\_PATH Introduced in 7.12.1. Last used in 7.15.5. - CURLOPT\_SOURCE\_PORT Introduced in 7.12.1. Last used in 7.15.5. - CURLOPT\_SOURCE\_POSTQUOTE Introduced in 7.12.1. Last used in 7.15.5. - CURLOPT\_SOURCE\_PREQUOTE Introduced in 7.12.1. Last used in 7.15.5. - CURLOPT\_SOURCE\_QUOTE Introduced in 7.13.0. Last used in 7.15.5. - CURLOPT\_SOURCE\_URL Introduced in 7.13.0. Last used in 7.15.5. - CURLOPT\_SOURCE\_USERPWD Introduced in 7.12.1. Last used in 7.15.5. - CURLOPT\_SSH\_AUTH\_TYPES Introduced in 7.16.1. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLOPT\_SSH\_COMPRESSION Introduced in 7.56.0. See *[CURLOPT\_SSH\_COMPRESSION(3)](/CURLOPT_SSH_COMPRESSION/3.md)*. - CURLOPT\_SSH\_HOST\_PUBLIC\_KEY\_MD5 Introduced in 7.17.1. See *[CURLOPT\_SSH\_HOST\_PUBLIC\_KEY\_MD5(3)](/CURLOPT_SSH_HOST_PUBLIC_KEY_MD5/3.md)*. - CURLOPT\_SSH\_HOST\_PUBLIC\_KEY\_SHA256 Introduced in 7.80.0. See *[CURLOPT\_SSH\_HOST\_PUBLIC\_KEY\_SHA256(3)](/CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256/3.md)*. - CURLOPT\_SSH\_HOSTKEYDATA Introduced in 7.84.0. See *[CURLOPT\_SSH\_HOSTKEYDATA(3)](/CURLOPT_SSH_HOSTKEYDATA/3.md)*. - CURLOPT\_SSH\_HOSTKEYFUNCTION Introduced in 7.84.0. See *[CURLOPT\_SSH\_HOSTKEYFUNCTION(3)](/CURLOPT_SSH_HOSTKEYFUNCTION/3.md)*. - CURLOPT\_SSH\_KEYDATA Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYDATA(3)](/CURLOPT_SSH_KEYDATA/3.md)*. - CURLOPT\_SSH\_KEYFUNCTION Introduced in 7.19.6. See *[CURLOPT\_SSH\_KEYFUNCTION(3)](/CURLOPT_SSH_KEYFUNCTION/3.md)*. - CURLOPT\_SSH\_KNOWNHOSTS Introduced in 7.19.6. See *[CURLOPT\_SSH\_KNOWNHOSTS(3)](/CURLOPT_SSH_KNOWNHOSTS/3.md)*. - CURLOPT\_SSH\_PRIVATE\_KEYFILE Introduced in 7.16.1. See *[CURLOPT\_SSH\_PRIVATE\_KEYFILE(3)](/CURLOPT_SSH_PRIVATE_KEYFILE/3.md)*. - CURLOPT\_SSH\_PUBLIC\_KEYFILE Introduced in 7.16.1. See *[CURLOPT\_SSH\_PUBLIC\_KEYFILE(3)](/CURLOPT_SSH_PUBLIC_KEYFILE/3.md)*. - CURLOPT\_SSL\_CIPHER\_LIST Introduced in 7.9. See *[CURLOPT\_SSL\_CIPHER\_LIST(3)](/CURLOPT_SSL_CIPHER_LIST/3.md)*. - CURLOPT\_SSL\_CTX\_DATA Introduced in 7.10.6. See *[CURLOPT\_SSL\_CTX\_DATA(3)](/CURLOPT_SSL_CTX_DATA/3.md)*. - CURLOPT\_SSL\_CTX\_FUNCTION Introduced in 7.10.6. See *[CURLOPT\_SSL\_CTX\_FUNCTION(3)](/CURLOPT_SSL_CTX_FUNCTION/3.md)*. - CURLOPT\_SSL\_EC\_CURVES Introduced in 7.73.0. See *[CURLOPT\_SSL\_EC\_CURVES(3)](/CURLOPT_SSL_EC_CURVES/3.md)*. - CURLOPT\_SSL\_ENABLE\_ALPN Introduced in 7.36.0. See *[CURLOPT\_SSL\_ENABLE\_ALPN(3)](/CURLOPT_SSL_ENABLE_ALPN/3.md)*. - CURLOPT\_SSL\_ENABLE\_NPN Introduced in 7.36.0. Deprecated since 7.86.0. - CURLOPT\_SSL\_FALSESTART Introduced in 7.42.0. Deprecated since 8.15.0. - CURLOPT\_SSL\_OPTIONS Introduced in 7.25.0. See *[CURLOPT\_SSL\_OPTIONS(3)](/CURLOPT_SSL_OPTIONS/3.md)*. - CURLOPT\_SSL\_SESSIONID\_CACHE Introduced in 7.16.0. See *[CURLOPT\_SSL\_SESSIONID\_CACHE(3)](/CURLOPT_SSL_SESSIONID_CACHE/3.md)*. - CURLOPT\_SSL\_SIGNATURE\_ALGORITHMS Introduced in 8.14.0. See *[CURLOPT\_SSL\_SIGNATURE\_ALGORITHMS(3)](/CURLOPT_SSL_SIGNATURE_ALGORITHMS/3.md)*. - CURLOPT\_SSL\_VERIFYHOST Introduced in 7.8.1. See *[CURLOPT\_SSL\_VERIFYHOST(3)](/CURLOPT_SSL_VERIFYHOST/3.md)*. - CURLOPT\_SSL\_VERIFYPEER Introduced in 7.4.2. See *[CURLOPT\_SSL\_VERIFYPEER(3)](/CURLOPT_SSL_VERIFYPEER/3.md)*. - CURLOPT\_SSL\_VERIFYSTATUS Introduced in 7.41.0. See *[CURLOPT\_SSL\_VERIFYSTATUS(3)](/CURLOPT_SSL_VERIFYSTATUS/3.md)*. - CURLOPT\_SSLCERT Introduced in 7.1. See *[CURLOPT\_SSLCERT(3)](/CURLOPT_SSLCERT/3.md)*. - CURLOPT\_SSLCERT\_BLOB Introduced in 7.71.0. See *[CURLOPT\_SSLCERT\_BLOB(3)](/CURLOPT_SSLCERT_BLOB/3.md)*. - CURLOPT\_SSLCERTPASSWD Introduced in 7.1.1. Deprecated since 7.17.0. - CURLOPT\_SSLCERTTYPE Introduced in 7.9.3. See *[CURLOPT\_SSLCERTTYPE(3)](/CURLOPT_SSLCERTTYPE/3.md)*. - CURLOPT\_SSLENGINE Introduced in 7.9.3. See *[CURLOPT\_SSLENGINE(3)](/CURLOPT_SSLENGINE/3.md)*. - CURLOPT\_SSLENGINE\_DEFAULT Introduced in 7.9.3. See *[CURLOPT\_SSLENGINE\_DEFAULT(3)](/CURLOPT_SSLENGINE_DEFAULT/3.md)*. - CURLOPT\_SSLKEY Introduced in 7.9.3. See *[CURLOPT\_SSLKEY(3)](/CURLOPT_SSLKEY/3.md)*. - CURLOPT\_SSLKEY\_BLOB Introduced in 7.71.0. See *[CURLOPT\_SSLKEY\_BLOB(3)](/CURLOPT_SSLKEY_BLOB/3.md)*. - CURLOPT\_SSLKEYPASSWD Introduced in 7.9.3. Deprecated since 7.17.0. - CURLOPT\_SSLKEYTYPE Introduced in 7.9.3. See *[CURLOPT\_SSLKEYTYPE(3)](/CURLOPT_SSLKEYTYPE/3.md)*. - CURLOPT\_SSLVERSION Introduced in 7.1. See *[CURLOPT\_SSLVERSION(3)](/CURLOPT_SSLVERSION/3.md)*. - CURLOPT\_STDERR Introduced in 7.1. See *[CURLOPT\_STDERR(3)](/CURLOPT_STDERR/3.md)*. - CURLOPT\_STREAM\_DEPENDS Introduced in 7.46.0. Deprecated since 8.21.0. - CURLOPT\_STREAM\_DEPENDS\_E Introduced in 7.46.0. Deprecated since 8.21.0. - CURLOPT\_STREAM\_WEIGHT Introduced in 7.46.0. See *[CURLOPT\_STREAM\_WEIGHT(3)](/CURLOPT_STREAM_WEIGHT/3.md)*. - CURLOPT\_SUPPRESS\_CONNECT\_HEADERS Introduced in 7.54.0. See *[CURLOPT\_SUPPRESS\_CONNECT\_HEADERS(3)](/CURLOPT_SUPPRESS_CONNECT_HEADERS/3.md)*. - CURLOPT\_TCP\_FASTOPEN Introduced in 7.49.0. See *[CURLOPT\_TCP\_FASTOPEN(3)](/CURLOPT_TCP_FASTOPEN/3.md)*. - CURLOPT\_TCP\_KEEPALIVE Introduced in 7.25.0. See *[CURLOPT\_TCP\_KEEPALIVE(3)](/CURLOPT_TCP_KEEPALIVE/3.md)*. - CURLOPT\_TCP\_KEEPCNT Introduced in 8.9.0. See *[CURLOPT\_TCP\_KEEPCNT(3)](/CURLOPT_TCP_KEEPCNT/3.md)*. - CURLOPT\_TCP\_KEEPIDLE Introduced in 7.25.0. See *[CURLOPT\_TCP\_KEEPIDLE(3)](/CURLOPT_TCP_KEEPIDLE/3.md)*. - CURLOPT\_TCP\_KEEPINTVL Introduced in 7.25.0. See *[CURLOPT\_TCP\_KEEPINTVL(3)](/CURLOPT_TCP_KEEPINTVL/3.md)*. - CURLOPT\_TCP\_NODELAY Introduced in 7.11.2. See *[CURLOPT\_TCP\_NODELAY(3)](/CURLOPT_TCP_NODELAY/3.md)*. - CURLOPT\_TELNETOPTIONS Introduced in 7.7. See *[CURLOPT\_TELNETOPTIONS(3)](/CURLOPT_TELNETOPTIONS/3.md)*. - CURLOPT\_TFTP\_BLKSIZE Introduced in 7.19.4. See *[CURLOPT\_TFTP\_BLKSIZE(3)](/CURLOPT_TFTP_BLKSIZE/3.md)*. - CURLOPT\_TFTP\_NO\_OPTIONS Introduced in 7.48.0. See *[CURLOPT\_TFTP\_NO\_OPTIONS(3)](/CURLOPT_TFTP_NO_OPTIONS/3.md)*. - CURLOPT\_TIMECONDITION Introduced in 7.1. See *[CURLOPT\_TIMECONDITION(3)](/CURLOPT_TIMECONDITION/3.md)*. - CURLOPT\_TIMEOUT Introduced in 7.1. See *[CURLOPT\_TIMEOUT(3)](/CURLOPT_TIMEOUT/3.md)*. - CURLOPT\_TIMEOUT\_MS Introduced in 7.16.2. See *[CURLOPT\_TIMEOUT\_MS(3)](/CURLOPT_TIMEOUT_MS/3.md)*. - CURLOPT\_TIMEVALUE Introduced in 7.1. See *[CURLOPT\_TIMEVALUE(3)](/CURLOPT_TIMEVALUE/3.md)*. - CURLOPT\_TIMEVALUE\_LARGE Introduced in 7.59.0. See *[CURLOPT\_TIMEVALUE\_LARGE(3)](/CURLOPT_TIMEVALUE_LARGE/3.md)*. - CURLOPT\_TLS13\_CIPHERS Introduced in 7.61.0. See *[CURLOPT\_TLS13\_CIPHERS(3)](/CURLOPT_TLS13_CIPHERS/3.md)*. - CURLOPT\_TLSAUTH\_PASSWORD Introduced in 7.21.4. Deprecated since 8.22.0. - CURLOPT\_TLSAUTH\_TYPE Introduced in 7.21.4. Deprecated since 8.22.0. - CURLOPT\_TLSAUTH\_USERNAME Introduced in 7.21.4. Deprecated since 8.22.0. - CURLOPT\_TRAILERDATA Introduced in 7.64.0. See *[CURLOPT\_TRAILERDATA(3)](/CURLOPT_TRAILERDATA/3.md)*. - CURLOPT\_TRAILERFUNCTION Introduced in 7.64.0. See *[CURLOPT\_TRAILERFUNCTION(3)](/CURLOPT_TRAILERFUNCTION/3.md)*. - CURLOPT\_TRANSFER\_ENCODING Introduced in 7.21.6. See *[CURLOPT\_TRANSFER\_ENCODING(3)](/CURLOPT_TRANSFER_ENCODING/3.md)*. - CURLOPT\_TRANSFERTEXT Introduced in 7.1.1. See *[CURLOPT\_TRANSFERTEXT(3)](/CURLOPT_TRANSFERTEXT/3.md)*. - CURLOPT\_UNIX\_SOCKET\_PATH Introduced in 7.40.0. See *[CURLOPT\_UNIX\_SOCKET\_PATH(3)](/CURLOPT_UNIX_SOCKET_PATH/3.md)*. - CURLOPT\_UNRESTRICTED\_AUTH Introduced in 7.10.4. See *[CURLOPT\_UNRESTRICTED\_AUTH(3)](/CURLOPT_UNRESTRICTED_AUTH/3.md)*. - CURLOPT\_UPKEEP\_INTERVAL\_MS Introduced in 7.62.0. See *[CURLOPT\_UPKEEP\_INTERVAL\_MS(3)](/CURLOPT_UPKEEP_INTERVAL_MS/3.md)*. - CURLOPT\_UPLOAD Introduced in 7.1. See *[CURLOPT\_UPLOAD(3)](/CURLOPT_UPLOAD/3.md)*. - CURLOPT\_UPLOAD\_BUFFERSIZE Introduced in 7.62.0. See *[CURLOPT\_UPLOAD\_BUFFERSIZE(3)](/CURLOPT_UPLOAD_BUFFERSIZE/3.md)*. - CURLOPT\_UPLOAD\_FLAGS Introduced in 8.13.0. See *[CURLOPT\_UPLOAD\_FLAGS(3)](/CURLOPT_UPLOAD_FLAGS/3.md)*. - CURLOPT\_URL Introduced in 7.1. See *[CURLOPT\_URL(3)](/CURLOPT_URL/3.md)*. - CURLOPT\_USE\_SSL Introduced in 7.17.0. See *[CURLOPT\_USE\_SSL(3)](/CURLOPT_USE_SSL/3.md)*. - CURLOPT\_USERAGENT Introduced in 7.1. See *[CURLOPT\_USERAGENT(3)](/CURLOPT_USERAGENT/3.md)*. - CURLOPT\_USERNAME Introduced in 7.19.1. See *[CURLOPT\_USERNAME(3)](/CURLOPT_USERNAME/3.md)*. - CURLOPT\_USERPWD Introduced in 7.1. See *[CURLOPT\_USERPWD(3)](/CURLOPT_USERPWD/3.md)*. - CURLOPT\_VERBOSE Introduced in 7.1. See *[CURLOPT\_VERBOSE(3)](/CURLOPT_VERBOSE/3.md)*. - CURLOPT\_WILDCARDMATCH Introduced in 7.21.0. See *[CURLOPT\_WILDCARDMATCH(3)](/CURLOPT_WILDCARDMATCH/3.md)*. - CURLOPT\_WRITEDATA Introduced in 7.9.7. See *[CURLOPT\_WRITEDATA(3)](/CURLOPT_WRITEDATA/3.md)*. - CURLOPT\_WRITEFUNCTION Introduced in 7.1. See *[CURLOPT\_WRITEFUNCTION(3)](/CURLOPT_WRITEFUNCTION/3.md)*. - CURLOPT\_WRITEHEADER Introduced in 7.1. See CURLOPT\_HEADERDATA. - CURLOPT\_WRITEINFO Introduced in 7.1. - CURLOPT\_WS\_OPTIONS Introduced in 7.86.0. See *[CURLOPT\_WS\_OPTIONS(3)](/CURLOPT_WS_OPTIONS/3.md)*. - CURLOPT\_XFERINFODATA Introduced in 7.32.0. See *[CURLOPT\_XFERINFODATA(3)](/CURLOPT_XFERINFODATA/3.md)*. - CURLOPT\_XFERINFOFUNCTION Introduced in 7.32.0. See *[CURLOPT\_XFERINFOFUNCTION(3)](/CURLOPT_XFERINFOFUNCTION/3.md)*. - CURLOPT\_XOAUTH2\_BEARER Introduced in 7.33.0. See *[CURLOPT\_XOAUTH2\_BEARER(3)](/CURLOPT_XOAUTH2_BEARER/3.md)*. - CURLOPTDEPRECATED Introduced in 7.87.0. - CURLOPTTYPE\_BLOB Introduced in 7.71.0. - CURLOPTTYPE\_CBPOINT Introduced in 7.73.0. - CURLOPTTYPE\_FUNCTIONPOINT Introduced in 7.1. - CURLOPTTYPE\_LONG Introduced in 7.1. - CURLOPTTYPE\_OBJECTPOINT Introduced in 7.1. - CURLOPTTYPE\_OFF\_T Introduced in 7.11.0. - CURLOPTTYPE\_SLISTPOINT Introduced in 7.65.2. - CURLOPTTYPE\_STRINGPOINT Introduced in 7.46.0. - CURLOPTTYPE\_VALUES Introduced in 7.73.0. - CURLOT\_BLOB Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_CBPTR Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_FLAG\_ALIAS Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_FUNCTION Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_LONG Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_OBJECT Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_OFF\_T Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_SLIST Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_STRING Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLOT\_VALUES Introduced in 7.73.0. See *[curl\_easy\_option\_next(3)](/curl_easy_option_next/3.md)*. - CURLPAUSE\_ALL Introduced in 7.18.0. See *[curl\_easy\_pause(3)](/curl_easy_pause/3.md)*. - CURLPAUSE\_CONT Introduced in 7.18.0. See *[curl\_easy\_pause(3)](/curl_easy_pause/3.md)*. - CURLPAUSE\_RECV Introduced in 7.18.0. See *[curl\_easy\_pause(3)](/curl_easy_pause/3.md)*. - CURLPAUSE\_RECV\_CONT Introduced in 7.18.0. See *[curl\_easy\_pause(3)](/curl_easy_pause/3.md)*. - CURLPAUSE\_SEND Introduced in 7.18.0. See *[curl\_easy\_pause(3)](/curl_easy_pause/3.md)*. - CURLPAUSE\_SEND\_CONT Introduced in 7.18.0. See *[curl\_easy\_pause(3)](/curl_easy_pause/3.md)*. - CURLPIPE\_HTTP1 Introduced in 7.43.0. See *[CURLMOPT\_PIPELINING(3)](/CURLMOPT_PIPELINING/3.md)*. - CURLPIPE\_MULTIPLEX Introduced in 7.43.0. See *[CURLMOPT\_PIPELINING(3)](/CURLMOPT_PIPELINING/3.md)*. - CURLPIPE\_NOTHING Introduced in 7.43.0. See *[CURLMOPT\_PIPELINING(3)](/CURLMOPT_PIPELINING/3.md)*. - CURLPROTO\_ALL Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_DICT Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_FILE Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_FTP Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_FTPS Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_GOPHER Introduced in 7.21.2. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_GOPHERS Introduced in 7.75.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_HTTP Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_HTTPS Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_IMAP Introduced in 7.20.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_IMAPS Introduced in 7.20.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_LDAP Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_LDAPS Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_MQTT Introduced in 7.71.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_POP3 Introduced in 7.20.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_POP3S Introduced in 7.20.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_RTMP Introduced in 7.21.0. Deprecated since 8.20.0. - CURLPROTO\_RTMPE Introduced in 7.21.0. Deprecated since 8.20.0. - CURLPROTO\_RTMPS Introduced in 7.21.0. Deprecated since 8.20.0. - CURLPROTO\_RTMPT Introduced in 7.21.0. Deprecated since 8.20.0. - CURLPROTO\_RTMPTE Introduced in 7.21.0. Deprecated since 8.20.0. - CURLPROTO\_RTMPTS Introduced in 7.21.0. Deprecated since 8.20.0. - CURLPROTO\_RTSP Introduced in 7.20.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_SCP Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_SFTP Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_SMB Introduced in 7.40.0. Deprecated since 8.23.0. - CURLPROTO\_SMBS Introduced in 7.40.0. Deprecated since 8.23.0. - CURLPROTO\_SMTP Introduced in 7.20.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_SMTPS Introduced in 7.20.0. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_TELNET Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROTO\_TFTP Introduced in 7.19.4. See *[CURLINFO\_PROTOCOL(3)](/CURLINFO_PROTOCOL/3.md)*. - CURLPROXY\_HTTP Introduced in 7.10. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPROXY\_HTTP\_1\_0 Introduced in 7.19.4. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPROXY\_HTTPS Introduced in 7.52.0. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPROXY\_HTTPS2 Introduced in 8.1.0. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPROXY\_HTTPS3 Introduced in 8.21.0. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPROXY\_SOCKS4 Introduced in 7.10. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPROXY\_SOCKS4A Introduced in 7.18.0. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPROXY\_SOCKS5 Introduced in 7.10. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPROXY\_SOCKS5\_HOSTNAME Introduced in 7.18.0. See *[CURLOPT\_PROXYTYPE(3)](/CURLOPT_PROXYTYPE/3.md)*. - CURLPX\_BAD\_ADDRESS\_TYPE Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_BAD\_VERSION Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_CLOSED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_GSSAPI Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_GSSAPI\_PERMSG Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_GSSAPI\_PROTECTION Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_IDENTD Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_IDENTD\_DIFFER Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_LONG\_HOSTNAME Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_LONG\_PASSWD Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_LONG\_USER Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_NO\_AUTH Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_OK Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_RECV\_ADDRESS Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_RECV\_AUTH Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_RECV\_CONNECT Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_RECV\_REQACK Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_ADDRESS\_TYPE\_NOT\_SUPPORTED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_COMMAND\_NOT\_SUPPORTED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_CONNECTION\_REFUSED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_GENERAL\_SERVER\_FAILURE Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_HOST\_UNREACHABLE Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_NETWORK\_UNREACHABLE Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_NOT\_ALLOWED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_TTL\_EXPIRED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REPLY\_UNASSIGNED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_REQUEST\_FAILED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_RESOLVE\_HOST Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_SEND\_AUTH Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_SEND\_CONNECT Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_SEND\_REQUEST Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_UNKNOWN\_FAIL Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_UNKNOWN\_MODE Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLPX\_USER\_REJECTED Introduced in 7.73.0. See *[CURLINFO\_PROXY\_ERROR(3)](/CURLINFO_PROXY_ERROR/3.md)*. - CURLSHE\_BAD\_OPTION Introduced in 7.10.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLSHE\_IN\_USE Introduced in 7.10.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLSHE\_INVALID Introduced in 7.10.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLSHE\_NOMEM Introduced in 7.12.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLSHE\_NOT\_BUILT\_IN Introduced in 7.23.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLSHE\_OK Introduced in 7.10.3. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLSHOPT\_LOCKFUNC Introduced in 7.10.3. See *[CURLSHOPT\_LOCKFUNC(3)](/CURLSHOPT_LOCKFUNC/3.md)*. - CURLSHOPT\_NONE Introduced in 7.10.3. See *[curl\_share\_setopt(3)](/curl_share_setopt/3.md)*. - CURLSHOPT\_SHARE Introduced in 7.10.3. See *[CURLSHOPT\_SHARE(3)](/CURLSHOPT_SHARE/3.md)*. - CURLSHOPT\_UNLOCKFUNC Introduced in 7.10.3. See *[CURLSHOPT\_UNLOCKFUNC(3)](/CURLSHOPT_UNLOCKFUNC/3.md)*. - CURLSHOPT\_UNSHARE Introduced in 7.10.3. See *[CURLSHOPT\_UNSHARE(3)](/CURLSHOPT_UNSHARE/3.md)*. - CURLSHOPT\_USERDATA Introduced in 7.10.3. See *[CURLSHOPT\_USERDATA(3)](/CURLSHOPT_USERDATA/3.md)*. - CURLSOCKTYPE\_ACCEPT Introduced in 7.28.0. See *[CURLOPT\_SOCKOPTFUNCTION(3)](/CURLOPT_SOCKOPTFUNCTION/3.md)*. - CURLSOCKTYPE\_IPCXN Introduced in 7.16.0. See *[CURLOPT\_SOCKOPTFUNCTION(3)](/CURLOPT_SOCKOPTFUNCTION/3.md)*. - CURLSSH\_AUTH\_AGENT Introduced in 7.28.0. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSH\_AUTH\_ANY Introduced in 7.16.1. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSH\_AUTH\_DEFAULT Introduced in 7.16.1. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSH\_AUTH\_GSSAPI Introduced in 7.58.0. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSH\_AUTH\_HOST Introduced in 7.16.1. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSH\_AUTH\_KEYBOARD Introduced in 7.16.1. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSH\_AUTH\_NONE Introduced in 7.16.1. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSH\_AUTH\_PASSWORD Introduced in 7.16.1. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSH\_AUTH\_PUBLICKEY Introduced in 7.16.1. See *[CURLOPT\_SSH\_AUTH\_TYPES(3)](/CURLOPT_SSH_AUTH_TYPES/3.md)*. - CURLSSLBACKEND\_AWSLC Introduced in 8.1.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_AXTLS Introduced in 7.38.0. Deprecated since 7.61.0. - CURLSSLBACKEND\_BEARSSL Introduced in 7.68.0. Deprecated since 8.15.0. - CURLSSLBACKEND\_BORINGSSL Introduced in 7.49.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_CYASSL Introduced in 7.34.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_DARWINSSL Introduced in 7.34.0. Deprecated since 7.64.1. - CURLSSLBACKEND\_GNUTLS Introduced in 7.34.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_GSKIT Introduced in 7.34.0. Deprecated since 8.3.0. - CURLSSLBACKEND\_LIBRESSL Introduced in 7.49.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_MBEDTLS Introduced in 7.46.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_MESALINK Introduced in 7.62.0. Deprecated since 7.82.0. - CURLSSLBACKEND\_NONE Introduced in 7.34.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_NSS Introduced in 7.34.0. Deprecated since 8.3.0. - CURLSSLBACKEND\_OPENSSL Introduced in 7.34.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_POLARSSL Introduced in 7.34.0. Deprecated since 7.69.0. - CURLSSLBACKEND\_QSOSSL Introduced in 7.34.0. Last used in 7.38.0. - CURLSSLBACKEND\_RUSTLS Introduced in 7.76.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_SCHANNEL Introduced in 7.34.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLBACKEND\_SECURETRANSPORT Introduced in 7.64.1. Deprecated since 8.15.0. - CURLSSLBACKEND\_WOLFSSL Introduced in 7.49.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLOPT\_ALLOW\_BEAST Introduced in 7.25.0. See *[CURLOPT\_SSL\_OPTIONS(3)](/CURLOPT_SSL_OPTIONS/3.md)*. - CURLSSLOPT\_AUTO\_CLIENT\_CERT Introduced in 7.77.0. See *[CURLOPT\_SSL\_OPTIONS(3)](/CURLOPT_SSL_OPTIONS/3.md)*. - CURLSSLOPT\_EARLYDATA Introduced in 8.11.0. See *[CURLOPT\_SSL\_OPTIONS(3)](/CURLOPT_SSL_OPTIONS/3.md)*. - CURLSSLOPT\_NATIVE\_CA Introduced in 7.71.0. See *[CURLOPT\_SSL\_OPTIONS(3)](/CURLOPT_SSL_OPTIONS/3.md)*. - CURLSSLOPT\_NO\_PARTIALCHAIN Introduced in 7.68.0. See *[CURLOPT\_SSL\_OPTIONS(3)](/CURLOPT_SSL_OPTIONS/3.md)*. - CURLSSLOPT\_NO\_REVOKE Introduced in 7.44.0. See *[CURLOPT\_SSL\_OPTIONS(3)](/CURLOPT_SSL_OPTIONS/3.md)*. - CURLSSLOPT\_REVOKE\_BEST\_EFFORT Introduced in 7.70.0. See *[CURLOPT\_SSL\_OPTIONS(3)](/CURLOPT_SSL_OPTIONS/3.md)*. - CURLSSLSET\_NO\_BACKENDS Introduced in 7.56.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLSET\_OK Introduced in 7.56.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLSET\_TOO\_LATE Introduced in 7.56.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSSLSET\_UNKNOWN\_BACKEND Introduced in 7.56.0. See *[curl\_global\_sslset(3)](/curl_global_sslset/3.md)*. - CURLSTS\_DONE Introduced in 7.74.0. See *[CURLOPT\_HSTSREADFUNCTION(3)](/CURLOPT_HSTSREADFUNCTION/3.md)*. - CURLSTS\_FAIL Introduced in 7.74.0. See *[CURLOPT\_HSTSREADFUNCTION(3)](/CURLOPT_HSTSREADFUNCTION/3.md)*. - CURLSTS\_OK Introduced in 7.74.0. See *[CURLOPT\_HSTSREADFUNCTION(3)](/CURLOPT_HSTSREADFUNCTION/3.md)*. - CURLU\_ALLOW\_SPACE Introduced in 7.78.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_APPENDQUERY Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_DEFAULT\_PORT Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_DEFAULT\_SCHEME Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_DISALLOW\_USER Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_GET\_EMPTY Introduced in 8.8.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_GUESS\_SCHEME Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_NO\_AUTHORITY Introduced in 7.67.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_NO\_DEFAULT\_PORT Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_NO\_GUESS\_SCHEME Introduced in 8.9.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_NON\_SUPPORT\_SCHEME Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_PATH\_AS\_IS Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_PUNY2IDN Introduced in 8.3.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_PUNYCODE Introduced in 7.88.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_URLDECODE Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLU\_URLENCODE Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUE\_BACKSLASH Introduced in 8.22.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_FILE\_URL Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_FRAGMENT Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_HANDLE Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_HOSTNAME Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_IPV6 Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_LOGIN Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_PARTPOINTER Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_PASSWORD Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_PATH Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_PORT\_NUMBER Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_QUERY Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_SCHEME Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_SLASHES Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_BAD\_USER Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_LACKS\_IDN Introduced in 7.88.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_MALFORMED\_INPUT Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_FRAGMENT Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_HOST Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_OPTIONS Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_PASSWORD Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_PORT Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_QUERY Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_SCHEME Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_USER Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_NO\_ZONEID Introduced in 7.81.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_OK Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_OUT\_OF\_MEMORY Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_TOO\_LARGE Introduced in 8.6.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_UNKNOWN\_PART Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_UNSUPPORTED\_SCHEME Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_URLDECODE Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLUE\_USER\_NOT\_ALLOWED Introduced in 7.62.0. See *[libcurl-errors(3)](/libcurl-errors/3.md)*. - CURLULFLAG\_ANSWERED Introduced in 8.13.0. - CURLULFLAG\_DELETED Introduced in 8.13.0. - CURLULFLAG\_DRAFT Introduced in 8.13.0. - CURLULFLAG\_FLAGGED Introduced in 8.13.0. - CURLULFLAG\_SEEN Introduced in 8.13.0. - CURLUPART\_FRAGMENT Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_HOST Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_OPTIONS Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_PASSWORD Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_PATH Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_PORT Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_QUERY Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_SCHEME Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_URL Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_USER Introduced in 7.62.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUPART\_ZONEID Introduced in 7.65.0. See *[curl\_url\_get(3)](/curl_url_get/3.md)*. - CURLUSESSL\_ALL Introduced in 7.17.0. See *[CURLOPT\_USE\_SSL(3)](/CURLOPT_USE_SSL/3.md)*. - CURLUSESSL\_CONTROL Introduced in 7.17.0. See *[CURLOPT\_USE\_SSL(3)](/CURLOPT_USE_SSL/3.md)*. - CURLUSESSL\_NONE Introduced in 7.17.0. See *[CURLOPT\_USE\_SSL(3)](/CURLOPT_USE_SSL/3.md)*. - CURLUSESSL\_TRY Introduced in 7.17.0. See *[CURLOPT\_USE\_SSL(3)](/CURLOPT_USE_SSL/3.md)*. - CURLVERSION\_EIGHTH Introduced in 7.72.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_ELEVENTH Introduced in 7.87.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_FIFTH Introduced in 7.57.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_FIRST Introduced in 7.10. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_FOURTH Introduced in 7.16.1. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_NINTH Introduced in 7.75.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_NOW Introduced in 7.10. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_SECOND Introduced in 7.11.1. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_SEVENTH Introduced in 7.70.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_SIXTH Introduced in 7.66.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_TENTH Introduced in 7.77.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_THIRD Introduced in 7.12.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLVERSION\_TWELFTH Introduced in 8.8.0. See *[curl\_version\_info(3)](/curl_version_info/3.md)*. - CURLWARNING Introduced in 7.66.0. - CURLWS\_BINARY Introduced in 7.86.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. - CURLWS\_CLOSE Introduced in 7.86.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. - CURLWS\_CONT Introduced in 7.86.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. - CURLWS\_NOAUTOPONG Introduced in 8.14.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. - CURLWS\_OFFSET Introduced in 7.86.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. - CURLWS\_PING Introduced in 7.86.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. - CURLWS\_PONG Introduced in 7.86.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. - CURLWS\_RAW\_MODE Introduced in 7.86.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. - CURLWS\_TEXT Introduced in 7.86.0. See *[curl\_ws\_send(3)](/curl_ws_send/3.md)*. ## SEE ALSO [**libcurl**(3)](/libcurl/3.md), [**libcurl-easy**(3)](/libcurl-easy/3.md), [**libcurl-multi**(3)](/libcurl-multi/3.md), [**libcurl-security**(3)](/libcurl-security/3.md), [**libcurl-thread**(3)](/libcurl-thread/3.md)