diff options
Diffstat (limited to 'tap.c')
| -rw-r--r-- | tap.c | 33 |
1 files changed, 28 insertions, 5 deletions
@@ -97,6 +97,32 @@ int tap_send(const struct ctx *c, const void *data, size_t len, int vnet_pre) } /** + * tap_ip4_daddr() - Normal IPv4 destination address for inbound packets + * @c: Execution context + * + * Returns: IPv4 address, network order + */ +in_addr_t tap_ip4_daddr(const struct ctx *c) +{ + return c->ip4.addr_seen; +} + +/** + * tap_ip6_daddr() - Normal IPv4 destination address for inbound packets + * @c: Execution context + * @src: Source address + * + * Returns: pointer to IPv6 address + */ +const struct in6_addr *tap_ip6_daddr(const struct ctx *c, + const struct in6_addr *src) +{ + if (IN6_IS_ADDR_LINKLOCAL(src)) + return &c->ip6.addr_ll_seen; + return &c->ip6.addr_seen; +} + +/** * tap_ip_send() - Send IP packet, with L2 headers, calculating L3/L4 checksums * @c: Execution context * @src: IPv6 source address, IPv4-mapped for IPv4 sources @@ -132,7 +158,7 @@ void tap_ip_send(const struct ctx *c, const struct in6_addr *src, uint8_t proto, iph->frag_off = 0; iph->ttl = 255; iph->protocol = proto; - iph->daddr = c->ip4.addr_seen; + iph->daddr = tap_ip4_daddr(c); memcpy(&iph->saddr, &src->s6_addr[12], 4); csum_ip4_header(iph); @@ -163,10 +189,7 @@ void tap_ip_send(const struct ctx *c, const struct in6_addr *src, uint8_t proto, ip6h->priority = 0; ip6h->saddr = *src; - if (IN6_IS_ADDR_LINKLOCAL(src)) - ip6h->daddr = c->ip6.addr_ll_seen; - else - ip6h->daddr = c->ip6.addr_seen; + ip6h->daddr = *tap_ip6_daddr(c, src); memcpy(data, in, len); |