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Add args for UDP faking support.

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This commit is contained in:
Vadim Vetrov
2024-12-06 13:45:50 +03:00
parent 7480cd31b8
commit f9a51944dd
7 changed files with 324 additions and 80 deletions
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44
mangle.c
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@@ -363,43 +363,13 @@ int process_udp_packet(const struct section_config_t *section, const uint8_t *pk
}
if (!detect_udp_filtered(section, pkt, pktlen))
goto continue_flow;
if (section->quic_drop) {
lgtrace_addp("QUIC probe");
const struct quic_lhdr *qch;
uint32_t qch_len;
struct quic_cids qci;
uint8_t *quic_raw_payload;
uint32_t quic_raw_plen;
ret = quic_parse_data((uint8_t *)data, dlen,
(struct quic_lhdr **)&qch, &qch_len, &qci,
&quic_raw_payload, &quic_raw_plen);
if (ret < 0) {
lgtrace_addp("undefined type");
goto accept_quic;
}
lgtrace_addp("QUIC detected");
uint8_t qtype = qch->type;
if (section->udp_mode == UDP_MODE_DROP)
goto drop;
if (qch->version == QUIC_V1)
qtype = quic_convtype_v1(qtype);
else if (qch->version == QUIC_V2)
qtype = quic_convtype_v2(qtype);
if (qtype != QUIC_INITIAL_TYPE) {
lgtrace_addp("quic message type: %d", qtype);
goto accept_quic;
}
lgtrace_addp("quic initial message");
}
if (1) {
for (int i = 0; i < 6; i++) {
else if (section->udp_mode == UDP_MODE_FAKE) {
for (int i = 0; i < section->udp_fake_seq_len; i++) {
NETBUF_ALLOC(fake_udp, MAX_PACKET_SIZE);
if (!NETBUF_CHECK(fake_udp)) {
lgerror(-ENOMEM, "Allocation error");
@@ -408,9 +378,9 @@ int process_udp_packet(const struct section_config_t *section, const uint8_t *pk
uint32_t fsn_len = MAX_PACKET_SIZE;
struct udp_fake_type fake_type = {
.fake_len = 64,
.fake_len = section->udp_fake_len,
.strategy = {
.strategy = FAKE_STRAT_UDP_CHECK,
.strategy = section->udp_faking_strategy,
},
};
ret = gen_fake_udp(fake_type, iph, iph_len, udph, fake_udp, &fsn_len);