diff options
Diffstat (limited to 'tap.c')
| -rw-r--r-- | tap.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -149,17 +149,19 @@ static void *tap_push_l2h(const struct ctx *c, void *buf, uint16_t proto) static void *tap_push_ip4h(struct iphdr *ip4h, struct in_addr src, struct in_addr dst, size_t len, uint8_t proto) { + uint16_t tot_len = len + sizeof(*ip4h); + ip4h->version = 4; ip4h->ihl = sizeof(struct iphdr) / 4; ip4h->tos = 0; - ip4h->tot_len = htons(len + sizeof(*ip4h)); + ip4h->tot_len = htons(tot_len); ip4h->id = 0; ip4h->frag_off = 0; ip4h->ttl = 255; ip4h->protocol = proto; ip4h->saddr = src.s_addr; ip4h->daddr = dst.s_addr; - ip4h->check = csum_ip4_header(ip4h->tot_len, proto, src, dst); + ip4h->check = csum_ip4_header(tot_len, proto, src, dst); return ip4h + 1; } |