diff options
Diffstat (limited to 'net/checksum.c')
| -rw-r--r-- | net/checksum.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/checksum.c b/net/checksum.c index 5cb8b2c..dabd290 100644 --- a/net/checksum.c +++ b/net/checksum.c @@ -61,6 +61,7 @@ void net_checksum_calculate(uint8_t *data, int length) { int mac_hdr_len, ip_len; struct ip_header *ip; + uint16_t csum; /* * Note: We cannot assume "data" is aligned, so the all code uses @@ -106,6 +107,11 @@ void net_checksum_calculate(uint8_t *data, int length) return; /* not IPv4 */ } + /* Calculate IP checksum */ + stw_he_p(&ip->ip_sum, 0); + csum = net_raw_checksum((uint8_t *)ip, IP_HDR_GET_LEN(ip)); + stw_be_p(&ip->ip_sum, csum); + if (IP4_IS_FRAGMENT(ip)) { return; /* a fragmented IP packet */ } @@ -122,7 +128,6 @@ void net_checksum_calculate(uint8_t *data, int length) switch (ip->ip_p) { case IP_PROTO_TCP: { - uint16_t csum; tcp_header *tcp = (tcp_header *)(ip + 1); if (ip_len < sizeof(tcp_header)) { @@ -143,7 +148,6 @@ void net_checksum_calculate(uint8_t *data, int length) } case IP_PROTO_UDP: { - uint16_t csum; udp_header *udp = (udp_header *)(ip + 1); if (ip_len < sizeof(udp_header)) { |