diff options
Diffstat (limited to 'udp.c')
| -rw-r--r-- | udp.c | 18 |
1 files changed, 10 insertions, 8 deletions
@@ -625,6 +625,7 @@ static size_t udp_update_hdr6(const struct ctx *c, int n, in_port_t dstport, { struct udp6_l2_buf_t *b = &udp6_l2_buf[n]; const struct in6_addr *src, *dst; + uint16_t payload_len; in_port_t src_port; size_t ip_len; @@ -634,7 +635,8 @@ static size_t udp_update_hdr6(const struct ctx *c, int n, in_port_t dstport, ip_len = udp6_l2_mh_sock[n].msg_len + sizeof(b->ip6h) + sizeof(b->uh); - b->ip6h.payload_len = htons(udp6_l2_mh_sock[n].msg_len + sizeof(b->uh)); + payload_len = udp6_l2_mh_sock[n].msg_len + sizeof(b->uh); + b->ip6h.payload_len = htons(payload_len); if (IN6_IS_ADDR_LINKLOCAL(src)) { dst = &c->ip6.addr_ll_seen; @@ -670,17 +672,17 @@ static size_t udp_update_hdr6(const struct ctx *c, int n, in_port_t dstport, } b->ip6h.daddr = *dst; b->ip6h.saddr = *src; + b->ip6h.version = 6; + b->ip6h.nexthdr = IPPROTO_UDP; + b->ip6h.hop_limit = 255; b->uh.source = b->s_in6.sin6_port; b->uh.dest = htons(dstport); b->uh.len = b->ip6h.payload_len; - - b->ip6h.hop_limit = IPPROTO_UDP; - b->ip6h.version = b->ip6h.nexthdr = b->uh.check = 0; - b->uh.check = csum(&b->ip6h, ip_len, 0); - b->ip6h.version = 6; - b->ip6h.nexthdr = IPPROTO_UDP; - b->ip6h.hop_limit = 255; + b->uh.check = 0; + b->uh.check = csum(&b->uh, payload_len, + proto_ipv6_header_psum(payload_len, IPPROTO_UDP, + src, dst)); return tap_iov_len(c, &b->taph, ip_len); } |