diff options
Diffstat (limited to 'ipv4.c')
| -rw-r--r-- | ipv4.c | 13 |
1 files changed, 8 insertions, 5 deletions
@@ -70,7 +70,7 @@ int ipv4_packet(clat_packet out, int pos, const char *packet, size_t len) { uint8_t nxthdr; const char *next_header; size_t len_left; - uint32_t checksum; + uint32_t old_sum, new_sum; int iov_len; if(len < sizeof(struct iphdr)) { @@ -121,14 +121,17 @@ int ipv4_packet(clat_packet out, int pos, const char *packet, size_t len) { out[pos].iov_len = sizeof(struct ip6_hdr); // Calculate the pseudo-header checksum. - checksum = ipv6_pseudo_header_checksum(0, ip6_targ, len_left); + old_sum = ipv4_pseudo_header_checksum(0, header, len_left); + new_sum = ipv6_pseudo_header_checksum(0, ip6_targ, len_left); if (nxthdr == IPPROTO_ICMPV6) { - iov_len = icmp_packet(out, pos + 1, (const struct icmphdr *) next_header, checksum, len_left); + iov_len = icmp_packet(out, pos + 1, (const struct icmphdr *) next_header, new_sum, len_left); } else if (nxthdr == IPPROTO_TCP) { - iov_len = tcp_packet(out, pos + 1, (const struct tcphdr *) next_header, checksum, len_left); + iov_len = tcp_packet(out, pos + 1, (const struct tcphdr *) next_header, old_sum, new_sum, + len_left); } else if (nxthdr == IPPROTO_UDP) { - iov_len = udp_packet(out, pos + 1, (const struct udphdr *) next_header, checksum, len_left); + iov_len = udp_packet(out, pos + 1, (const struct udphdr *) next_header, old_sum, new_sum, + len_left); } else if (nxthdr == IPPROTO_GRE) { iov_len = generic_packet(out, pos + 1, next_header, len_left); } else { |