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Add support for tcp_check and past sequence faking strategies

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This commit is contained in:
Vadim Vetrov
2024-08-16 22:47:55 +03:00
parent 1c5d4e68d9
commit a546e783c6
4 changed files with 41 additions and 15 deletions
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8
mangle.c
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@@ -710,7 +710,7 @@ int fail4_packet(uint8_t *payload, uint32_t plen) {
return ret;
}
if (config.faking_strategy == FAKE_STRAT_ACK_SEQ) {
if (config.faking_strategy == FAKE_STRAT_RAND_SEQ) {
#ifdef KERNEL_SCOPE
tcph->seq = 124;
tcph->ack_seq = 124;
@@ -718,6 +718,8 @@ int fail4_packet(uint8_t *payload, uint32_t plen) {
tcph->seq = random();
tcph->ack_seq = random();
#endif
} else if (config.faking_strategy == FAKE_STRAT_PAST_SEQ) {
tcph->seq = htonl(ntohl(tcph->seq) - dlen);
} else if (config.faking_strategy == FAKE_STRAT_TTL) {
iph->ttl = config.faking_ttl;
}
@@ -725,5 +727,9 @@ int fail4_packet(uint8_t *payload, uint32_t plen) {
ip4_set_checksum(iph);
tcp4_set_checksum(tcph, iph);
if (config.faking_strategy == FAKE_STRAT_TCP_CHECK) {
tcph->check += 1;
}
return 0;
}