| 148 | } |
| 149 | |
| 150 | BOOL __ETHFilter(u8 *buf, s32 len) { |
| 151 | ETHHeader *eh; |
| 152 | IPHeader *ip; |
| 153 | TCPHeader *tcp; |
| 154 | TCPResetInfo *ri; |
| 155 | u8 digest1[16]; |
| 156 | u8 digest2[16]; |
| 157 | |
| 158 | ri = &Ri; |
| 159 | if (CheckConsoleType()) { |
| 160 | return TRUE; |
| 161 | } |
| 162 | |
| 163 | eh = (ETHHeader *)buf; |
| 164 | if (eh->type != 0x800) { |
| 165 | return TRUE; |
| 166 | } |
| 167 | |
| 168 | if (memcmp(eh->src, NintendoAddr, 3) == 0) { |
| 169 | return TRUE; |
| 170 | } |
| 171 | |
| 172 | len = len - sizeof(ETHHeader); |
| 173 | ip = (IPHeader *)(eh + 1); |
| 174 | if (len < IP_MIN_HLEN || len < ip->len) { |
| 175 | return TRUE; |
| 176 | } |
| 177 | |
| 178 | if(ip->proto != IP_PROTO_TCP) { |
| 179 | return TRUE; |
| 180 | } |
| 181 | |
| 182 | tcp = (TCPHeader *)((u32)ip + ((ip->verlen & 0xf) << 2)); |
| 183 | if ((s32)(((tcp->flag & 0xf000) >> 10)) < TCP_MIN_HLEN) { |
| 184 | return TRUE; |
| 185 | } |
| 186 | |
| 187 | if (ip->len < ((ip->verlen & 0xf) << 2) + (s32)(((tcp->flag & 0xf000) >> 10))) { |
| 188 | return TRUE; |
| 189 | } |
| 190 | |
| 191 | if ((tcp->flag & 3) == 2) { |
| 192 | switch(tcp->src) { |
| 193 | case 0x76c: |
| 194 | case 0x35: |
| 195 | return TRUE; |
| 196 | } |
| 197 | |
| 198 | switch (tcp->dst) { |
| 199 | case 0x76c: |
| 200 | return TRUE; |
| 201 | } |
| 202 | |
| 203 | if (IPIsLocalAddr(0, ip->src) == FALSE) { |
| 204 | return TRUE; |
| 205 | } |
| 206 | |
| 207 | if (tcp->flag & 4) { |
no test coverage detected