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Fix tcp4 frag error caused by enabled IP fragmentation

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If the packet is fragmented here is no way to deal with it, but we don't
care about DF flag in real
This commit is contained in:
Vadim Vetrov 2024-08-07 11:38:26 +03:00
parent 1b8d3a0e66
commit c9949a3605
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GPG Key ID: E8A308689D7A73A5
2 changed files with 10 additions and 6 deletions
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6
mangle.c
View File

@ -226,7 +226,11 @@ int tcp4_frag(const __u8 *pkt, __u32 buflen, __u32 payload_offset,
} }
if (!(ntohs(hdr->frag_off) & IP_DF)) { if (
ntohs(hdr->frag_off) & IP_MF ||
ntohs(hdr->frag_off) & IP_OFFMASK) {
printf("tcp4_frag: frag value: %d\n",
ntohs(hdr->frag_off));
lgerror("tcp4_frag: ip fragmentation is set", -EINVAL); lgerror("tcp4_frag: ip fragmentation is set", -EINVAL);
return -EINVAL; return -EINVAL;
} }

10
youtubeUnblock.c
View File

@ -383,7 +383,7 @@ static int process_packet(const struct packet_data packet, struct queue_data qda
mid_offset, frag1, &f1len, frag2, &f2len)) < 0) { mid_offset, frag1, &f1len, frag2, &f2len)) < 0) {
errno = -ret; errno = -ret;
perror("tcp4_frag"); perror("tcp4_frag");
goto send_verd; goto fallback;
} }
#elif defined(USE_IP_FRAGMENTATION) #elif defined(USE_IP_FRAGMENTATION)
@ -395,7 +395,7 @@ static int process_packet(const struct packet_data packet, struct queue_data qda
mid_offset, frag1, &f1len, frag2, &f2len)) < 0) { mid_offset, frag1, &f1len, frag2, &f2len)) < 0) {
errno = -ret; errno = -ret;
perror("ip4_frag"); perror("ip4_frag");
goto send_verd; goto fallback;
} }
#else #else
@ -404,7 +404,7 @@ static int process_packet(const struct packet_data packet, struct queue_data qda
errno = -ret; errno = -ret;
perror("raw pack send"); perror("raw pack send");
} }
goto send_verd; goto fallback;
#endif #endif
ret = send_raw_socket(frag2, f2len); ret = send_raw_socket(frag2, f2len);
@ -412,7 +412,7 @@ static int process_packet(const struct packet_data packet, struct queue_data qda
errno = -ret; errno = -ret;
perror("raw frags send: frag2"); perror("raw frags send: frag2");
goto send_verd; goto fallback;
} }
#ifdef SEG2_DELAY #ifdef SEG2_DELAY
@ -430,7 +430,7 @@ static int process_packet(const struct packet_data packet, struct queue_data qda
errno = -ret; errno = -ret;
perror("raw frags send: frag1"); perror("raw frags send: frag1");
goto send_verd; goto fallback;
} }
#endif #endif