mirror of https://passt.top/passt
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright (c) 2021 Red Hat GmbH
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* Author: Stefano Brivio <sbrivio@redhat.com>
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*/
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#ifndef IP_H
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#define IP_H
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#define IN4_IS_ADDR_UNSPECIFIED(a) \
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(((struct in_addr *)(a))->s_addr == htonl_constant(INADDR_ANY))
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#define IN4_IS_ADDR_BROADCAST(a) \
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(((struct in_addr *)(a))->s_addr == htonl_constant(INADDR_BROADCAST))
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#define IN4_IS_ADDR_LOOPBACK(a) \
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(ntohl(((struct in_addr *)(a))->s_addr) >> IN_CLASSA_NSHIFT == IN_LOOPBACKNET)
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#define IN4_IS_ADDR_MULTICAST(a) \
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(IN_MULTICAST(ntohl(((struct in_addr *)(a))->s_addr)))
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#define IN4_ARE_ADDR_EQUAL(a, b) \
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(((struct in_addr *)(a))->s_addr == ((struct in_addr *)b)->s_addr)
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#define IN4ADDR_LOOPBACK_INIT \
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{ .s_addr = htonl_constant(INADDR_LOOPBACK) }
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#define IN4ADDR_ANY_INIT \
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{ .s_addr = htonl_constant(INADDR_ANY) }
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#define IN4_IS_ADDR_LINKLOCAL(a) \
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((ntohl(((struct in_addr *)(a))->s_addr) >> 16) == 0xa9fe)
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#define IN4_IS_PREFIX_LINKLOCAL(a, len) \
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((len) >= 16 && IN4_IS_ADDR_LINKLOCAL(a))
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#define L2_BUF_IP4_INIT(proto) \
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{ \
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.version = 4, \
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.ihl = 5, \
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.tos = 0, \
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.tot_len = 0, \
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.id = 0, \
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.frag_off = 0, \
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.ttl = 0xff, \
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.protocol = (proto), \
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.saddr = 0, \
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.daddr = 0, \
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}
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#define L2_BUF_IP4_PSUM(proto) ((uint32_t)htons_constant(0x4500) + \
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(uint32_t)htons(0xff00 | (proto)))
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#define IN6_IS_PREFIX_LINKLOCAL(a, len) \
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((len) >= 10 && IN6_IS_ADDR_LINKLOCAL(a))
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#define L2_BUF_IP6_INIT(proto) \
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{ \
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.priority = 0, \
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.version = 6, \
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.flow_lbl = { 0 }, \
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.payload_len = 0, \
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.nexthdr = (proto), \
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.hop_limit = 255, \
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.saddr = IN6ADDR_ANY_INIT, \
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.daddr = IN6ADDR_ANY_INIT, \
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}
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struct ipv6hdr {
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wpedantic"
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#if __BYTE_ORDER == __BIG_ENDIAN
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uint8_t version:4,
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priority:4;
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#else
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uint8_t priority:4,
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version:4;
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#endif
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#pragma GCC diagnostic pop
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uint8_t flow_lbl[3];
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uint16_t payload_len;
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uint8_t nexthdr;
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uint8_t hop_limit;
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struct in6_addr saddr;
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struct in6_addr daddr;
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};
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struct ipv6_opt_hdr {
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uint8_t nexthdr;
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uint8_t hdrlen;
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/*
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* TLV encoded option data follows.
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*/
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} __attribute__((packed)); /* required for some archs */
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char *ipv6_l4hdr(const struct pool *p, int idx, size_t offset, uint8_t *proto,
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size_t *dlen);
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#endif /* IP_H */
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