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Cleanup code, update readme, fix gen_fake_sni

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This commit is contained in:
Vadim Vetrov
2024-08-01 20:54:02 +03:00
parent 57c5b1f6aa
commit 8808c49fbd
2 changed files with 45 additions and 17 deletions
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51
youtubeUnblock.c
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@@ -33,7 +33,7 @@
#define RAWSOCKET_MARK 0xfc70
#ifndef NO_SEG2_DELAY
#ifdef USE_SEG2_DELAY
#define SEG2_DELAY 100
#endif
@@ -589,15 +589,26 @@ static struct pkt_buff *gen_fake_sni(const struct iphdr *iph, const struct tcphd
int ret = 0;
struct iphdr *niph = nfq_ip_get_hdr(pkt);
if (!niph) goto err;
if (!niph) {
perror("gen_fake_sni: ip header is null");
goto err;
}
niph->protocol = IPPROTO_TCP;
niph->tot_len = htons(pkt_size);
ret = nfq_ip_set_transport_header(pkt, niph);
if (ret < 0) goto err;
if (ret < 0) {
perror("gen_fake_sni: set transport header");
goto err;
}
struct tcphdr *ntcph = nfq_tcp_get_hdr(pkt);
if (!ntcph) goto err;
if (!ntcph) {
perror("gen_fake_sni: nfq_tcp_get_hdr");
goto err;
}
niph->tot_len = htons(pkt_size);
ntcph->th_dport = tcph->th_dport;
ntcph->th_sport = tcph->th_sport;
nfq_ip_set_checksum(niph);
@@ -605,7 +616,6 @@ static struct pkt_buff *gen_fake_sni(const struct iphdr *iph, const struct tcphd
return pkt;
err:
fprintf(stderr, "Error in gen fake sni\n");
pktb_free(pkt);
return NULL;
@@ -712,6 +722,12 @@ static int process_packet(const struct packet_data packet) {
packet.payload,
packet.payload_len,
0);
if (pktb == NULL) {
perror("pktb_alloc of payload");
pktb_free(fake_sni);
goto fallback;
}
if (tcp4_frag(pktb, mid_offset, &frag1, &frag2) < 0) {
perror("tcp4_frag");
@@ -723,11 +739,10 @@ static int process_packet(const struct packet_data packet) {
ret = send_raw_socket(frag2);
if (ret < 0) {
errno = ret;
perror("raw frags send");
perror("raw frags send: frag2");
pktb_free(frag1);
goto err;
}
#ifdef SEG2_DELAY
struct dps_t *dpdt = malloc(sizeof(struct dps_t));
@@ -739,10 +754,12 @@ static int process_packet(const struct packet_data packet) {
#else
ret = send_raw_socket(frag1);
if (ret < 0) {
free(frag1);
errno = ret;
perror("raw frags send: frag1");
pktb_free(frag1);
goto err;
}
free(frag1);
pktb_free(frag1);
#endif
err:
pktb_free(frag2);
@@ -851,9 +868,17 @@ int main(int argc, const char *argv[])
}
#ifdef USE_TCP_SEGMENTATION
printf("Using TCP segmentation!\n");
printf("Using TCP segmentation\n");
#else
printf("Using IP fragmentation!\n");
printf("Using IP fragmentation\n");
#endif
#ifdef SEG2_DELAY
printf("Some outgoing googlevideo request segments will be delayed for %d ms as of SEG2_DELAY define\n", SEG2_DELAY);
#endif
#ifdef FAKE_SNI
printf("Fake SNI will be sent before each googlevideo request\n");
#endif
if (open_socket()) {
@@ -889,7 +914,7 @@ int main(int argc, const char *argv[])
nfq_nlmsg_cfg_put_params(nlh, NFQNL_COPY_PACKET, 0xffff);
#ifdef USE_GSO
printf("GSO is enabled!\n");
printf("GSO is enabled\n");
mnl_attr_put_u32(nlh, NFQA_CFG_FLAGS, htonl(NFQA_CFG_F_GSO));
mnl_attr_put_u32(nlh, NFQA_CFG_MASK, htonl(NFQA_CFG_F_GSO));