diff options
Diffstat (limited to 'udp.c')
| -rw-r--r-- | udp.c | 16 |
1 files changed, 16 insertions, 0 deletions
@@ -718,6 +718,12 @@ void udp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events, udp_tap_map[V6][src].loopback = 0; bitmap_set(udp_act[V6][UDP_ACT_TAP], src); + } else if (!IN6_IS_ADDR_UNSPECIFIED(&c->dns6_fwd) && + !memcmp(&b->s_in6.sin6_addr, &c->dns6_fwd, + sizeof(c->dns6_fwd)) && + ntohs(b->s_in6.sin6_port) == 53) { + b->ip6h.daddr = c->addr6_seen; + b->ip6h.saddr = c->dns6_fwd; } else { b->ip6h.daddr = c->addr6_seen; b->ip6h.saddr = b->s_in6.sin6_addr; @@ -797,6 +803,10 @@ void udp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events, udp_tap_map[V4][src].loopback = 1; bitmap_set(udp_act[V4][UDP_ACT_TAP], src); + } else if (c->dns4_fwd && + s_addr == ntohl(c->dns4[0]) && + ntohs(b->s_in.sin_port) == 53) { + b->iph.saddr = c->dns4_fwd; } else { b->iph.saddr = b->s_in.sin_addr.s_addr; } @@ -958,6 +968,9 @@ int udp_tap_handler(struct ctx *c, int af, void *addr, s_in.sin_addr.s_addr = htonl(INADDR_LOOPBACK); else s_in.sin_addr.s_addr = c->addr4_seen; + } else if (s_in.sin_addr.s_addr == c->dns4_fwd && + ntohs(s_in.sin_port) == 53) { + s_in.sin_addr.s_addr = c->dns4[0]; } } else { s_in6 = (struct sockaddr_in6) { @@ -976,6 +989,9 @@ int udp_tap_handler(struct ctx *c, int af, void *addr, s_in6.sin6_addr = in6addr_loopback; else s_in6.sin6_addr = c->addr6_seen; + } else if (!memcmp(addr, &c->dns6_fwd, sizeof(c->dns6_fwd)) && + ntohs(s_in6.sin6_port) == 53) { + s_in6.sin6_addr = c->dns6[0]; } else if (IN6_IS_ADDR_LINKLOCAL(&s_in6.sin6_addr)) { bind_to = BIND_LL; } |