--- name: "rte_ipv6_get_next_ext" section: "3" platform: "linux" package: "dpdk-doc" version: "24.11.4-0+deb13u1" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/rte_ip6.h" --- # rte\_ipv6\_get\_next\_ext(3) Part of [rte\_ip6.h(3)](/rte_ip6.h/3.md). ## NAME rte\_ip6.h ## SYNOPSIS `#include `\ `#include `\ `#include `\ `#include `\ `#include `\ `#include `\ `#include `\ `#include `\ `#include `\ `#include `\ `#include `\ ### Data Structures struct **rte\_ipv6\_addr**\ ### Macros \#define **RTE\_IPV6\_ADDR\_SIZE** 16\ \#define **RTE\_IPV6\_MAX\_DEPTH** (**RTE\_IPV6\_ADDR\_SIZE** \* CHAR\_BIT)\ \#define **RTE\_IPV6\_U16\_SPLIT**(x)\ \#define **RTE\_IPV6**(a, b, c, d, e, f, g, h)\ \#define **RTE\_IPV6\_ADDR\_FMT** '%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x'\ \#define **RTE\_IPV6\_ADDR\_SPLIT**(ip)\ \#define **RTE\_IPV6\_MASK\_FULL** **RTE\_IPV6**(0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff)\ \#define **RTE\_IPV6\_ADDR\_UNSPEC** **RTE\_IPV6**(0, 0, 0, 0, 0, 0, 0, 0)\ \#define **RTE\_IPV6\_ADDR\_LOOPBACK** **RTE\_IPV6**(0, 0, 0, 0, 0, 0, 0, 1)\ \#define **RTE\_IPV6\_MIN\_MTU** 1280\ \#define **RTE\_IPV6\_EHDR\_MF\_SHIFT** 0\ **Well known multicast addresses**\ \#define **RTE\_IPV6\_ADDR\_ALLNODES\_IFACE\_LOCAL** **RTE\_IPV6**(0xff01, 0, 0, 0, 0, 0, 0, 1)\ \#define **RTE\_IPV6\_ADDR\_ALLNODES\_LINK\_LOCAL** **RTE\_IPV6**(0xff02, 0, 0, 0, 0, 0, 0, 1)\ \#define **RTE\_IPV6\_ADDR\_ALLROUTERS\_IFACE\_LOCAL** **RTE\_IPV6**(0xff01, 0, 0, 0, 0, 0, 0, 2)\ \#define **RTE\_IPV6\_ADDR\_ALLROUTERS\_LINK\_LOCAL** **RTE\_IPV6**(0xff02, 0, 0, 0, 0, 0, 0, 2)\ \#define **RTE\_IPV6\_ADDR\_ALLROUTERS\_SITE\_LOCAL** **RTE\_IPV6**(0xff05, 0, 0, 0, 0, 0, 0, 2)\ ### Enumerations enum **rte\_ipv6\_mc\_scope** { **RTE\_IPV6\_MC\_SCOPE\_NONE** = 0x00, **RTE\_IPV6\_MC\_SCOPE\_IFACELOCAL** = 0x01, **RTE\_IPV6\_MC\_SCOPE\_LINKLOCAL** = 0x02, **RTE\_IPV6\_MC\_SCOPE\_SITELOCAL** = 0x05, **RTE\_IPV6\_MC\_SCOPE\_ORGLOCAL** = 0x08, **RTE\_IPV6\_MC\_SCOPE\_GLOBAL** = 0x0e }\ ### Functions static bool **rte\_ipv6\_addr\_eq** (const struct **rte\_ipv6\_addr** \*a, const struct **rte\_ipv6\_addr** \*b)\ static void **rte\_ipv6\_addr\_mask** (struct **rte\_ipv6\_addr** \*ip, uint8\_t depth)\ static bool **rte\_ipv6\_addr\_eq\_prefix** (const struct **rte\_ipv6\_addr** \*a, const struct **rte\_ipv6\_addr** \*b, uint8\_t depth)\ static uint8\_t **rte\_ipv6\_mask\_depth** (const struct **rte\_ipv6\_addr** \*mask)\ static bool **rte\_ipv6\_addr\_is\_unspec** (const struct **rte\_ipv6\_addr** \*ip)\ static bool **rte\_ipv6\_addr\_is\_loopback** (const struct **rte\_ipv6\_addr** \*ip)\ static bool **rte\_ipv6\_addr\_is\_linklocal** (const struct **rte\_ipv6\_addr** \*ip)\ static bool **rte\_ipv6\_addr\_is\_sitelocal** (const struct **rte\_ipv6\_addr** \*ip)\ static bool **rte\_ipv6\_addr\_is\_v4compat** (const struct **rte\_ipv6\_addr** \*ip)\ static bool **rte\_ipv6\_addr\_is\_v4mapped** (const struct **rte\_ipv6\_addr** \*ip)\ static bool **rte\_ipv6\_addr\_is\_mcast** (const struct **rte\_ipv6\_addr** \*ip)\ static enum **rte\_ipv6\_mc\_scope** **rte\_ipv6\_mc\_scope** (const struct **rte\_ipv6\_addr** \*ip)\ static void **rte\_ipv6\_solnode\_from\_addr** (struct **rte\_ipv6\_addr** \*sol, const struct **rte\_ipv6\_addr** \*ip)\ static void **rte\_ether\_mcast\_from\_ipv6** (struct rte\_ether\_addr \*mac, const struct **rte\_ipv6\_addr** \*ip)\ struct **\_\_rte\_aligned** (2) rte\_ipv6\_hdr\ static int **rte\_ipv6\_check\_version** (const struct rte\_ipv6\_hdr \*ip)\ static uint16\_t **rte\_ipv6\_phdr\_cksum** (const struct rte\_ipv6\_hdr \*ipv6\_hdr, uint64\_t ol\_flags)\ static uint16\_t **rte\_ipv6\_udptcp\_cksum** (const struct rte\_ipv6\_hdr \*ipv6\_hdr, const void \*l4\_hdr)\ static uint16\_t **rte\_ipv6\_udptcp\_cksum\_mbuf** (const struct **rte\_mbuf** \*m, const struct rte\_ipv6\_hdr \*ipv6\_hdr, uint16\_t l4\_off)\ static int **rte\_ipv6\_udptcp\_cksum\_verify** (const struct rte\_ipv6\_hdr \*ipv6\_hdr, const void \*l4\_hdr)\ static int **rte\_ipv6\_udptcp\_cksum\_mbuf\_verify** (const struct **rte\_mbuf** \*m, const struct rte\_ipv6\_hdr \*ipv6\_hdr, uint16\_t l4\_off)\ static int **rte\_ipv6\_get\_next\_ext** (const uint8\_t \*p, int proto, size\_t \*ext\_len)\ ## Detailed Description IPv6-related defines Definition in file **rte\_ip6.h**. ## Macro Definition Documentation ### #define RTE\_IPV6\_ADDR\_SIZE 16 Maximum IPv6 address size in bytes. Definition at line **43** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_MAX\_DEPTH (RTE\_IPV6\_ADDR\_SIZE \* CHAR\_BIT) Maximum IPv6 address size in bits. Definition at line **48** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_U16\_SPLIT(x) **Value:**.PP ``` (uint8_t)((uint16_t)(x) & UINT16_C(0xff)), \ (uint8_t)(((uint16_t)(x) >> 8) & UINT16_C(0xff)) ``` Split a literal 16 bit unsigned integer into two bytes separated by a comma according to the platform endianness. **Parameters** *x* A `uint16_t` literal value. **Returns** Two `uint8_t` literals separated by a coma. Definition at line **162** of file **rte\_ip6.h**. ### #define RTE\_IPV6(a, b, c, d, e, f, g, h) **Value:**.PP ``` {{ \ RTE_IPV6_U16_SPLIT(a), \ RTE_IPV6_U16_SPLIT(b), \ RTE_IPV6_U16_SPLIT(c), \ RTE_IPV6_U16_SPLIT(d), \ RTE_IPV6_U16_SPLIT(e), \ RTE_IPV6_U16_SPLIT(f), \ RTE_IPV6_U16_SPLIT(g), \ RTE_IPV6_U16_SPLIT(h) \ }} ``` Shorthand to define a literal IPv6 address based on 16bit unsigned integers. **Parameters** *a,b,c,d,e,f,g,h* `uint8_t` literals that will be passed to **RTE\_IPV6\_U16\_SPLIT(x)**. **Returns** A literal **rte\_ipv6\_addr** value suitable for static initialization. Definition at line **179** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_FMT '%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x' printf() format element for **rte\_ipv6\_addr** structures. To be used along with **RTE\_IPV6\_ADDR\_SPLIT(ip)**. Definition at line **195** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_SPLIT(ip) **Value:**.PP ``` ((uint8_t)(ip)->a[0]), \ ((uint8_t)(ip)->a[1]), \ ((uint8_t)(ip)->a[2]), \ ((uint8_t)(ip)->a[3]), \ ((uint8_t)(ip)->a[4]), \ ((uint8_t)(ip)->a[5]), \ ((uint8_t)(ip)->a[6]), \ ((uint8_t)(ip)->a[7]), \ ((uint8_t)(ip)->a[8]), \ ((uint8_t)(ip)->a[9]), \ ((uint8_t)(ip)->a[10]), \ ((uint8_t)(ip)->a[11]), \ ((uint8_t)(ip)->a[12]), \ ((uint8_t)(ip)->a[13]), \ ((uint8_t)(ip)->a[14]), \ ((uint8_t)(ip)->a[15]) ``` For use with **RTE\_IPV6\_ADDR\_FMT**. E.g.: ``` printf(RTE_IPV6_ADDR_FMT "\n", RTE_IPV6_ADDR_SPLIT(&ip)); ``` **Parameters** *ip* A struct **rte\_ipv6\_addr** pointer. **Returns** A set of 16 `uint8_t` values separated by comas for use in printf(). Definition at line **210** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_MASK\_FULL RTE\_IPV6(0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff) Full IPv6 mask. NB: this is not a valid/routable IPv6 address. Definition at line **229** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_UNSPEC RTE\_IPV6(0, 0, 0, 0, 0, 0, 0, 0) Unspecified IPv6 address as defined in RFC 4291, section 2.5.2. Definition at line **233** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_LOOPBACK RTE\_IPV6(0, 0, 0, 0, 0, 0, 0, 1) Loopback IPv6 address as defined in RFC 4291, section 2.5.3. Definition at line **251** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_ALLNODES\_IFACE\_LOCAL RTE\_IPV6(0xff01, 0, 0, 0, 0, 0, 0, 1) Interface-local all-nodes multicast address as defined in RFC 4291, section 2.7.1. Definition at line **383** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_ALLNODES\_LINK\_LOCAL RTE\_IPV6(0xff02, 0, 0, 0, 0, 0, 0, 1) Link-local all-nodes multicast address as defined in RFC 4291, section 2.7.1. Definition at line **385** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_ALLROUTERS\_IFACE\_LOCAL RTE\_IPV6(0xff01, 0, 0, 0, 0, 0, 0, 2) Interface-local all-routers multicast address as defined in RFC 4291, section 2.7.1. Definition at line **387** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_ALLROUTERS\_LINK\_LOCAL RTE\_IPV6(0xff02, 0, 0, 0, 0, 0, 0, 2) Link-local all-routers multicast address as defined in RFC 4291, section 2.7.1. Definition at line **389** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_ADDR\_ALLROUTERS\_SITE\_LOCAL RTE\_IPV6(0xff05, 0, 0, 0, 0, 0, 0, 2) Site-local all-routers multicast address as defined in RFC 4291, section 2.7.1. Definition at line **391** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_MIN\_MTU 1280 Minimum MTU for IPv6, see RFC 8200. Definition at line **542** of file **rte\_ip6.h**. ### #define RTE\_IPV6\_EHDR\_MF\_SHIFT 0 IPv6 fragment extension header. Definition at line **746** of file **rte\_ip6.h**. ## Enumeration Type Documentation ### enum rte\_ipv6\_mc\_scope IPv6 multicast scope values as defined in RFC 4291, section 2.7. **Enumerator** - *RTE\_IPV6\_MC\_SCOPE\_NONE* *Invalid multicast scope.* - *RTE\_IPV6\_MC\_SCOPE\_IFACELOCAL* *Interface-local multicast scope.* - *RTE\_IPV6\_MC\_SCOPE\_LINKLOCAL* *Link-local multicast scope.* - *RTE\_IPV6\_MC\_SCOPE\_SITELOCAL* *Site-local multicast scope.* - *RTE\_IPV6\_MC\_SCOPE\_ORGLOCAL* *Organizational-local multicast scope.* - *RTE\_IPV6\_MC\_SCOPE\_GLOBAL* *Global multicast scope.* *Definition at line* **348** *of file* **rte\_ip6.h***.* ## Function Documentation ### static bool rte\_ipv6\_addr\_eq (const struct rte\_ipv6\_addr \* a, const struct rte\_ipv6\_addr \* b)` [inline]`, ` [static]` *Check if two IPv6 Addresses are equal.* **Parameters** *a The first address.* \ *b The second address.* **Returns** *true if both addresses are identical.* *Definition at line* **68** *of file* **rte\_ip6.h***.* ### static void rte\_ipv6\_addr\_mask (struct rte\_ipv6\_addr \* ip, uint8\_t depth)` [inline]`, ` [static]` *Mask an IPv6 address using the specified depth.* *Leave untouched one bit per unit in the depth variable and set the rest to 0.* **Parameters** *ip The address to mask.* \ *depth All bits starting from this bit number will be set to zero.* *Definition at line* **84** *of file* **rte\_ip6.h***.* ### static bool rte\_ipv6\_addr\_eq\_prefix (const struct rte\_ipv6\_addr \* a, const struct rte\_ipv6\_addr \* b, uint8\_t depth)` [inline]`, ` [static]` *Check if two IPv6 addresses belong to the same network prefix.* **Parameters** *a The first address or network.* \ *b The second address or network.* \ *depth The network prefix length.* **Returns** `true` *if the first* `depth` *bits of both addresses are identical.* *Definition at line* **109** *of file* **rte\_ip6.h***.* ### static uint8\_t rte\_ipv6\_mask\_depth (const struct rte\_ipv6\_addr \* mask)` [inline]`, ` [static]` *Get the depth of a given IPv6 address mask.* **Parameters** *mask The address mask.* **Returns** *The number of consecutive bits set to 1 starting from the beginning of the mask.* *Definition at line* **132** *of file* **rte\_ip6.h***.* ### static bool rte\_ipv6\_addr\_is\_unspec (const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Check if an IPv6 address is unspecified as defined in RFC 4291, section 2.5.2.* **Parameters** *ip The address to check.* **Returns** `true` *if the address is the unspecified address (all zeroes).* *Definition at line* **244** *of file* **rte\_ip6.h***.* ### static bool rte\_ipv6\_addr\_is\_loopback (const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Check if an IPv6 address is the loopback address as defined in RFC 4291, section 2.5.3.* **Parameters** *ip The address to check.* **Returns** `true` *if the address is the loopback address (all zeroes except the last bit).* *Definition at line* **263** *of file* **rte\_ip6.h***.* ### static bool rte\_ipv6\_addr\_is\_linklocal (const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Check if an IPv6 address is link-local as defined in RFC 4291, section 2.5.6.* **Parameters** *ip The address to check.* **Returns** `true` *if the address is a link-local address.* *Definition at line* **278** *of file* **rte\_ip6.h***.* ### static bool rte\_ipv6\_addr\_is\_sitelocal (const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Check if an IPv6 address is site-local as defined in RFC 4291, section 2.5.7.* **Parameters** *ip The address to check.* **Returns** `true` *if the address is a site-local address.* *Definition at line* **292** *of file* **rte\_ip6.h***.* ### static bool rte\_ipv6\_addr\_is\_v4compat (const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Check if an IPv6 address is an IPv4-compatible address as defined in RFC 4291, section 2.5.5.1.* **Parameters** *ip The address to check.* **Returns** `true` *if the address is an IPv4-compatible address.* *Definition at line* **307** *of file* **rte\_ip6.h***.* ### static bool rte\_ipv6\_addr\_is\_v4mapped (const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Check if an IPv6 address is an IPv4-mapped address as defined in RFC 4291, section 2.5.5.2.* **Parameters** *ip The address to check.* **Returns** `true` *if the address is an IPv4-mapped address.* *Definition at line* **325** *of file* **rte\_ip6.h***.* ### static bool rte\_ipv6\_addr\_is\_mcast (const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Check if an IPv6 address is multicast as defined in RFC 4291, section 2.7.* **Parameters** *ip The address to check.* **Returns** `true` *if the address is multicast.* *Definition at line* **340** *of file* **rte\_ip6.h***.* ### static enum rte\_ipv6\_mc\_scope rte\_ipv6\_mc\_scope (const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Extract the IPv6 multicast scope value as defined in RFC 4291, section 2.7.* **Parameters** *ip The address from which to get the multicast scope.* **Returns** *The multicast scope of the address, or* **RTE\_IPV6\_MC\_SCOPE\_NONE** *if the address is not multicast.* *Definition at line* **373** *of file* **rte\_ip6.h***.* ### static void rte\_ipv6\_solnode\_from\_addr (struct rte\_ipv6\_addr \* sol, const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Convert a unicast or anycast IPv6 address to a solicited-node multicast address as defined in RFC 4291, section 2.7.1.* **Parameters** *sol The IPv6 solicited-node multicast address to generate.* \ *ip A unicast or anycast address.* *Definition at line* **434** *of file* **rte\_ip6.h***.* ### static void rte\_ether\_mcast\_from\_ipv6 (struct rte\_ether\_addr \* mac, const struct rte\_ipv6\_addr \* ip)` [inline]`, ` [static]` *Generate a multicast Ethernet address from a multicast IPv6 address as defined in RFC 2464, section 7.* **Parameters** *mac The multicast Ethernet address to generate.* \ *ip A multicast IPv6 address.* *Definition at line* **456** *of file* **rte\_ip6.h***.* ### struct \_\_rte\_aligned (2) *IPv6 Header* *IPv6 Routing Extension Header \< IP version, traffic class & flow label.* *\< Flow label* *\< ECN* *\< Differentiated services* *\< Version* *\< IP payload size, including ext. headers* *\< Protocol, next header.* *\< Hop limits.* *\< IP address of source host.* *\< IP address of destination host(s).* *\< Protocol, next header.* *\< Header length.* *\< Extension header type.* *\< Valid segments number.* *\< Packet control data per type.* *\< The last\_entry field of SRH* *\< Packet flag.* *\< Packet tag.* *\< Next header type* *\< Reserved* *\< All fragmentation data* *\< Packet ID* *Definition at line* **456** *of file* **rte\_ip6.h***.* ### static int rte\_ipv6\_check\_version (const struct rte\_ipv6\_hdr \* ip)` [inline]`, ` [static]` *Check that the IPv6 header version field is valid according to RFC 8200 section 3.* **Parameters** *ip The IPv6 header.* **Returns** `0` *if the version field is valid.* `-EINVAL` *otherwise.* *Definition at line* **502** *of file* **rte\_ip6.h***.* ### static uint16\_t rte\_ipv6\_phdr\_cksum (const struct rte\_ipv6\_hdr \* ipv6\_hdr, uint64\_t ol\_flags)` [inline]`, ` [static]` *Process the pseudo-header checksum of an IPv6 header.* *Depending on the ol\_flags, the pseudo-header checksum expected by the drivers is not the same. For instance, when TSO is enabled, the IPv6 payload length must not be included in the packet.* *When ol\_flags is 0, it computes the standard pseudo-header checksum.* **Parameters** *ipv6\_hdr The pointer to the contiguous IPv6 header.* \ *ol\_flags The ol\_flags of the associated mbuf.* **Returns** *The non-complemented checksum to set in the L4 header.* *Definition at line* **561** *of file* **rte\_ip6.h***.* ### static uint16\_t rte\_ipv6\_udptcp\_cksum (const struct rte\_ipv6\_hdr \* ipv6\_hdr, const void \* l4\_hdr)` [inline]`, ` [static]` *Process the IPv6 UDP or TCP checksum.* *The IPv6 header must not be followed by extension headers. The layer 4 checksum must be set to 0 in the L4 header by the caller.* **Parameters** *ipv6\_hdr The pointer to the contiguous IPv6 header.* \ *l4\_hdr The pointer to the beginning of the L4 header.* **Returns** *The complemented checksum to set in the L4 header.* *Definition at line* **615** *of file* **rte\_ip6.h***.* ### static uint16\_t rte\_ipv6\_udptcp\_cksum\_mbuf (const struct rte\_mbuf \* m, const struct rte\_ipv6\_hdr \* ipv6\_hdr, uint16\_t l4\_off)` [inline]`, ` [static]` *Process the IPv6 UDP or TCP checksum of a packet.* *The IPv6 header must not be followed by extension headers. The layer 4 checksum must be set to 0 in the L4 header by the caller.* **Parameters** *m The pointer to the mbuf.* \ *ipv6\_hdr The pointer to the contiguous IPv6 header.* \ *l4\_off The offset in bytes to start L4 checksum.* **Returns** *The complemented checksum to set in the L4 header.* *Definition at line* **672** *of file* **rte\_ip6.h***.* ### static int rte\_ipv6\_udptcp\_cksum\_verify (const struct rte\_ipv6\_hdr \* ipv6\_hdr, const void \* l4\_hdr)` [inline]`, ` [static]` *Validate the IPv6 UDP or TCP checksum.* *In case of UDP, the caller must first check if udp\_hdr-\>dgram\_cksum is 0: this is either invalid or means no checksum in some situations. See 8.1 (Upper-Layer Checksums) in RFC 8200.* **Parameters** *ipv6\_hdr The pointer to the contiguous IPv6 header.* \ *l4\_hdr The pointer to the beginning of the L4 header.* **Returns** *Return 0 if the checksum is correct, else -1.* *Definition at line* **705** *of file* **rte\_ip6.h***.* ### static int rte\_ipv6\_udptcp\_cksum\_mbuf\_verify (const struct rte\_mbuf \* m, const struct rte\_ipv6\_hdr \* ipv6\_hdr, uint16\_t l4\_off)` [inline]`, ` [static]` *Validate the IPv6 UDP or TCP checksum of a packet.* *In case of UDP, the caller must first check if udp\_hdr-\>dgram\_cksum is 0: this is either invalid or means no checksum in some situations. See 8.1 (Upper-Layer Checksums) in RFC 8200.* **Parameters** *m The pointer to the mbuf.* \ *ipv6\_hdr The pointer to the contiguous IPv6 header.* \ *l4\_off The offset in bytes to start L4 checksum.* **Returns** *Return 0 if the checksum is correct, else -1.* *Definition at line* **733** *of file* **rte\_ip6.h***.* ### static int rte\_ipv6\_get\_next\_ext (const uint8\_t \* p, int proto, size\_t \* ext\_len)` [inline]`, ` [static]` *Parse next IPv6 header extension* *This function checks if proto number is an IPv6 extensions and parses its data if so, providing information on next header and extension length.* **Parameters** *p Pointer to an extension raw data.* \ *proto Protocol number extracted from the 'next header' field from the IPv6 header or the previous extension.* \ *ext\_len Extension data length.* **Returns** *next protocol number if proto is an IPv6 extension, -EINVAL otherwise* *Definition at line* **787** *of file* **rte\_ip6.h***.* ## Author *Generated automatically by Doxygen for DPDK from the source code.*