| 65 | } |
| 66 | |
| 67 | static u16 CalcTcpCheckSum(IPHeader *ip, s32 len) { |
| 68 | s32 hlen; |
| 69 | u16 *p; |
| 70 | u32 sum = 0; |
| 71 | |
| 72 | #line 212 |
| 73 | ASSERT(IP_MIN_HLEN + TCP_MIN_HLEN <= len); |
| 74 | #line 215 |
| 75 | ASSERT(ip->proto == IP_PROTO_TCP); |
| 76 | |
| 77 | hlen = (ip->verlen & 0xf) << 2; |
| 78 | sum += ((u16*)ip->src)[0]; |
| 79 | sum += ((u16*)ip->src)[1]; |
| 80 | sum += ((u16*)ip->dst)[0]; |
| 81 | sum += ((u16*)ip->dst)[1]; |
| 82 | sum += 6; |
| 83 | sum += (u32)len - (u32)hlen; |
| 84 | |
| 85 | p = (u16*)((u32)ip+hlen); |
| 86 | len = len - hlen; |
| 87 | while (len > 1) { |
| 88 | sum += *p++; |
| 89 | len -= 2; |
| 90 | } |
| 91 | |
| 92 | if (len == 1) { |
| 93 | sum += *((u8*)p) * 0x100; |
| 94 | } |
| 95 | |
| 96 | sum = (sum & 0xffff) + (sum >> 16); |
| 97 | sum = (sum & 0xffff) + (sum >> 16); |
| 98 | return sum ^ 0xffff; |
| 99 | } |
| 100 | |
| 101 | static s32 GetTcpSegLen(IPHeader *ip, TCPHeader *tcp) { |
| 102 | s32 len = ip->len - ((ip->verlen & 0xf) << 2) - (s32)(((tcp->flag & 0xf000) >> 10)); |
no outgoing calls
no test coverage detected