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Remaster tls parser for quic crypto

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This commit is contained in:
Vadim Vetrov
2025-01-02 19:02:21 +03:00
parent fa7fe5294d
commit e5153e9186
6 changed files with 368 additions and 127 deletions
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14
src/mangle.c
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@@ -177,11 +177,13 @@ int process_tcp_packet(const struct section_config_t *section, const uint8_t *ra
lgtrace_addp("TLS analyzed");
if (vrd.sni_len != 0) {
lgtrace_addp("SNI detected: %.*s", vrd.sni_len, data + vrd.sni_offset);
lgtrace_addp("SNI detected: %.*s", vrd.sni_len, vrd.sni_ptr);
}
if (vrd.target_sni) {
lgdebugmsg("Target SNI detected: %.*s", vrd.sni_len, data + vrd.sni_offset);
lgdebugmsg("Target SNI detected: %.*s", vrd.sni_len, vrd.sni_ptr);
size_t sni_offset = vrd.sni_ptr - data;
size_t target_sni_offset = vrd.target_sni_ptr - data;
uint32_t payload_len = raw_payload_len;
NETBUF_ALLOC(payload, MAX_PACKET_SIZE);
@@ -238,8 +240,8 @@ int process_tcp_packet(const struct section_config_t *section, const uint8_t *ra
switch (section->fragmentation_strategy) {
case FRAG_STRAT_TCP: {
ipd_offset = vrd.sni_target_offset;
mid_offset = ipd_offset + vrd.sni_target_len / 2;
ipd_offset = target_sni_offset;
mid_offset = ipd_offset + vrd.target_sni_len / 2;
uint32_t poses[2];
int cnt = 0;
@@ -269,8 +271,8 @@ int process_tcp_packet(const struct section_config_t *section, const uint8_t *ra
break;
case FRAG_STRAT_IP:
if (ipxv == IP4VERSION) {
ipd_offset = ((char *)data - (char *)tcph) + vrd.sni_target_offset;
mid_offset = ipd_offset + vrd.sni_target_len / 2;
ipd_offset = ((char *)data - (char *)tcph) + target_sni_offset;
mid_offset = ipd_offset + vrd.target_sni_len / 2;
mid_offset += 8 - mid_offset % 8;
uint32_t poses[2];