diff options
Diffstat (limited to 'udp.c')
| -rw-r--r-- | udp.c | 20 |
1 files changed, 2 insertions, 18 deletions
@@ -276,23 +276,6 @@ static void udp_invert_portmap(struct udp_fwd_ports *fwd) } /** - * udp_update_check4() - Update checksum with variable parts from stored one - * @buf: L2 packet buffer with final IPv4 header - */ -static void udp_update_check4(struct udp4_l2_buf_t *buf) -{ - uint32_t sum = L2_BUF_IP4_PSUM(IPPROTO_UDP); - - sum += buf->iph.tot_len; - sum += (buf->iph.saddr >> 16) & 0xffff; - sum += buf->iph.saddr & 0xffff; - sum += (buf->iph.daddr >> 16) & 0xffff; - sum += buf->iph.daddr & 0xffff; - - buf->iph.check = (uint16_t)~csum_fold(sum); -} - -/** * udp_update_l2_buf() - Update L2 buffers with Ethernet and IPv4 addresses * @eth_d: Ethernet destination address, NULL if unchanged * @eth_s: Ethernet source address, NULL if unchanged @@ -619,7 +602,8 @@ static size_t udp_update_hdr4(const struct ctx *c, int n, in_port_t dstport, } b->iph.saddr = src->s_addr; - udp_update_check4(b); + b->iph.check = csum_ip4_header(b->iph.tot_len, IPPROTO_UDP, + *src, c->ip4.addr_seen); b->uh.source = b->s_in.sin_port; b->uh.dest = htons(dstport); b->uh.len = htons(udp4_l2_mh_sock[n].msg_len + sizeof(b->uh)); |