mirror of
https://github.com/hufrea/byedpi.git
synced 2024-11-20 12:25:05 +00:00
517 lines
13 KiB
C
517 lines
13 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <limits.h>
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#include <params.h>
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#include <proxy.h>
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#include <packets.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <fcntl.h>
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#define FAKE_SUPPORT 1
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#define VERSION 2
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struct packet fake_tls = {
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sizeof(tls_data), tls_data
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},
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fake_http = {
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sizeof(http_data), http_data
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},
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fake_udp = {
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sizeof(udp_data), udp_data
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};
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struct params params = {
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.ttl = 8,
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.split = 3,
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.sfdelay = 3000,
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.attack = DESYNC_NONE,
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.desync_udp = 0,
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.split_host = 0,
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.def_ttl = 0,
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.mod_http = 0,
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.de_known = 0,
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.ipv6 = 1,
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.resolve = 1,
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.udp = 1,
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.max_open = 512,
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.bfsize = 16384,
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.nodelay = 1,
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.send_bfsz = 0,
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.recv_bfsz = 0,
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.baddr = {
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.sin6_family = AF_INET6
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},
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.debug = 0
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};
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const char help_text[] = {
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" -i, --ip, <ip> Listening IP, default 0.0.0.0\n"
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" -p, --port <num> Listening port, default 1080\n"
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" -D, --daemon Daemonize\n"
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" -f, --pidfile <file> Write pid to file\n"
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" -c, --max-conn <count> Connection count limit, default 512\n"
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" -N, --no-domain Deny domain resolving\n"
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" -U, --no-udp Deny UDP associate\n"
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" -I --conn-ip <ip> Connection binded IP, default ::\n"
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" -b, --bfs <size> Buffer size, default 16384\n"
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//" -L, --nodelay <0 or 1> Set TCP_NODELAY option\n"
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" -S, --snd-buf <size> Set SO_SNDBUF option\n"
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" -R, --rcv-buf <size> Set SO_RCVBUF option\n"
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" -x, --debug Print logs, 0, 1 or 2\n"
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// desync options
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" -K, --desync-known Desync only HTTP and TLS with SNI\n"
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#ifdef FAKE_SUPPORT
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" -m, --method <s|d|f> Desync method: split,disorder,fake\n"
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#else
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" -m, --method <s|d> Desync method: split,disorder\n"
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#endif
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" -s, --split-pos <offset> Split position, default 3\n"
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" -H, --split-at-host Add Host/SNI offset to split position\n"
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#ifdef FAKE_SUPPORT
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" -t, --ttl <num> TTL of fake packets, default 8\n"
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" -l, --fake-tls <file>\n"
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" -o, --fake-http <file>\n"
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" -e, --fake-udp <file> Set custom fake packet\n"
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" -n, --tls-sni <str> Change SNI in fake CH\n"
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#endif
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" -M, --mod-http <h,d,r> Modify http: hcsmix,dcsmix,rmspace\n"
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" -u, --desync-udp <f> UDP desync method: fake\n"
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};
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const struct option options[] = {
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{"daemon", 0, 0, 'D'},
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{"no-domain", 0, 0, 'N'},
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{"no-ipv6", 0, 0, 'X'},
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{"no-udp", 0, 0, 'U'},
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{"help", 0, 0, 'h'},
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{"version", 0, 0, 'v'},
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{"pidfile", 1, 0, 'f'},
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{"ip", 1, 0, 'i'},
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{"port", 1, 0, 'p'},
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{"conn-ip", 1, 0, 'I'},
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{"bfs", 1, 0, 'b'},
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//{"nodelay", 1, 0, 'L'},
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{"snd-buf", 1, 0, 'S'},
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{"rcv-buf", 1, 0, 'R'},
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{"max-conn", 1, 0, 'c'},
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{"debug", 1, 0, 'x'},
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{"desync-known ", 0, 0, 'K'},
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{"split-at-host", 0, 0, 'H'},
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{"method", 1, 0, 'm'},
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{"split-pos", 1, 0, 's'},
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{"ttl", 1, 0, 't'},
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#ifdef FAKE_SUPPORT
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{"fake-tls", 1, 0, 'l'},
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{"fake-http", 1, 0, 'o'},
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{"fake-udp", 1, 0, 'e'},
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{"tls-sni", 1, 0, 'n'},
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#endif
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{"mod-http", 1, 0, 'M'},
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{"desync-udp", 1, 0, 'u'},
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{"global-ttl", 1, 0, 'g'}, //
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{"delay", 1, 0, 'w'}, //
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{0}
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};
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char *ftob(char *name, ssize_t *sl)
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{
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char *buffer = 0;
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long size;
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FILE *file = fopen(name, "rb");
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if (!file)
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return 0;
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do {
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if (fseek(file, 0, SEEK_END)) {
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break;
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}
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size = ftell(file);
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if (!size || fseek(file, 0, SEEK_SET)) {
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break;
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}
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if (!(buffer = malloc(size))) {
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break;
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}
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if (fread(buffer, 1, size, file) != size) {
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free(buffer);
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buffer = 0;
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}
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} while (0);
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if (buffer) {
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*sl = size;
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}
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fclose(file);
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return buffer;
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}
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void daemonize(void)
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{
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pid_t pid = fork();
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if (pid < 0) {
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perror("fork");
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exit(1);
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}
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else if (pid) {
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exit(0);
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}
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if (setsid() < 0) {
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exit(1);
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}
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close(STDIN_FILENO);
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close(STDOUT_FILENO);
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close(STDERR_FILENO);
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open("/dev/null", O_RDWR);
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dup(0);
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dup(0);
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}
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int get_addr(char *str, struct sockaddr_ina *addr)
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{
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struct addrinfo hints = {0}, *res = 0;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_family = AF_UNSPEC;
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hints.ai_flags = AI_NUMERICHOST;
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if (getaddrinfo(str, 0, &hints, &res) || !res) {
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return -1;
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}
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if (res->ai_addr->sa_family == AF_INET6)
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addr->in6 = *(struct sockaddr_in6 *)res->ai_addr;
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else
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addr->in = *(struct sockaddr_in *)res->ai_addr;
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freeaddrinfo(res);
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return 0;
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}
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int main(int argc, char **argv)
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{
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struct sockaddr_ina s = {
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.in = {
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.sin_family = AF_INET,
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.sin_port = htons(1080)
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}},
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b = { .in6 = params.baddr };
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int optc = sizeof(options)/sizeof(*options);
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for (int i = 0, e = optc; i < e; i++)
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optc += options[i].has_arg;
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char opt[optc + 1];
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opt[optc] = 0;
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for (int i = 0, o = 0; o < optc; i++, o++) {
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opt[o] = options[i].val;
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for (int c = options[i].has_arg; c; c--) {
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o++;
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opt[o] = ':';
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}
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}
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char daemon = 0;
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char *pidfile = 0;
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int rez;
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int invalid = 0;
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long val = 0;
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char *end = 0;
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uint16_t port = htons(1080);
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while (!invalid && (rez = getopt_long_only(
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argc, argv, opt, options, 0)) != -1) {
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switch (rez) {
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case 'D':
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daemon = 1;
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break;
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case 'N':
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params.resolve = 0;
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break;
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case 'X':
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params.ipv6 = 0;
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break;
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case 'U':
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params.udp = 0;
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break;
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case 'h':
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printf(help_text);
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return 0;
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case 'v':
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printf("%d\n", VERSION);
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return 0;
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case 'f':
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pidfile = optarg;
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break;
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case 'i':
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if (get_addr(optarg, &s) < 0)
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invalid = 1;
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break;
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case 'p':
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val = strtol(optarg, &end, 0);
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if (val <= 0 || val > 0xffff || *end)
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invalid = 1;
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else
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port = htons(val);
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break;
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case 'I':
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if (get_addr(optarg, &b) < 0)
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invalid = 1;
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else
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params.baddr = b.in6;
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break;
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case 'b':
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val = strtol(optarg, &end, 0);
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if (val <= 0 || val > INT_MAX/4 || *end)
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invalid = 1;
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else
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params.bfsize = val;
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break;
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case 'L':
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val = strtol(optarg, &end, 0);
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if (val < 0 || val > 1 || *end)
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invalid = 1;
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else
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params.nodelay = val;
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break;
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case 'S':
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val = strtol(optarg, &end, 0);
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if (val <= 0 || val > INT_MAX || *end)
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invalid = 1;
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else
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params.send_bfsz = val;
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break;
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case 'R':
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val = strtol(optarg, &end, 0);
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if (val <= 0 || val > INT_MAX || *end)
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invalid = 1;
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else
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params.recv_bfsz = val;
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break;
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case 'c':
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val = strtol(optarg, &end, 0);
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if (val <= 0 || val >= (0xffff/2) || *end)
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invalid = 1;
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else
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params.max_open = val;
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break;
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case 'x': //
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params.debug = strtol(optarg, 0, 0);
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if (params.debug < 0)
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invalid = 1;
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break;
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// desync options
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case 'K':
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params.de_known = 1;
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break;
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case 'H':
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params.split_host = 1;
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break;
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case 'm':
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if (params.attack != DESYNC_NONE) {
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fprintf(stderr, "methods incompatible\n");
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invalid = 1;
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}
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else switch (*optarg) {
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case 's':
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params.attack = DESYNC_SPLIT;
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break;
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case 'd':
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params.attack = DESYNC_DISORDER;
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break;
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case 'f':
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params.attack = DESYNC_FAKE;
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break;
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default:
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invalid = 1;
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}
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break;
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case 's':
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val = strtol(optarg, &end, 0);
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if (val < INT_MIN || val > INT_MAX || *end)
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invalid = 1;
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else
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params.split = val;
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break;
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case 't':
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val = strtol(optarg, &end, 0);
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if (val <= 0 || val > 255 || *end)
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invalid = 1;
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else
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params.ttl = val;
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break;
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case 'n':
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if (change_tls_sni(optarg, fake_tls.data, fake_tls.size)) {
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fprintf(stderr, "error chsni\n");
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return -1;
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}
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printf("sni: %s\n", optarg);
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break;
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case 'l':
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fake_tls.data = ftob(optarg, &fake_tls.size);
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if (!fake_tls.data) {
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perror("read file");
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return -1;
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}
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break;
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case 'o':
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fake_http.data = ftob(optarg, &fake_http.size);
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if (!fake_http.data) {
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perror("read file");
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return -1;
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}
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break;
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case 'e':
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fake_udp.data = ftob(optarg, &fake_udp.size);
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if (!fake_udp.data) {
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perror("read file");
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return -1;
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}
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break;
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case 'M':
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end = optarg;
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while (end && !invalid) {
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switch (*end) {
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case 'r':
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params.mod_http |= MH_SPACE;
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break;
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case 'h':
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params.mod_http |= MH_HMIX;
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break;
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case 'd':
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params.mod_http |= MH_DMIX;
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break;
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default:
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invalid = 1;
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continue;
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}
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end = strchr(end, ',');
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if (end) end++;
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}
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break;
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case 'u':
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if (*optarg != 'f')
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invalid = 1;
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else
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params.desync_udp = DESYNC_UDP_FAKE;
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break;
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case 'g': //
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val = strtol(optarg, &end, 0);
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if (val <= 0 || val > 255 || *end)
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invalid = 1;
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else
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params.def_ttl = val;
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break;
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case 'w': //
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params.sfdelay = strtoul(optarg, &end, 0);
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if (optarg == end || params.sfdelay > 1000000 || *end)
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invalid = 1;
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break;
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case 0:
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break;
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case '?':
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return -1;
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default:
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printf("?: %c\n", rez);
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return -1;
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}
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}
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if (invalid) {
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fprintf(stderr, "invalid value: -%c %s\n", rez, optarg);
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return -1;
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}
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s.in.sin_port = port;
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b.in.sin_port = 0;
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if (b.sa.sa_family != AF_INET6) {
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params.ipv6 = 0;
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}
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if (params.send_bfsz &&
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params.send_bfsz * 2 <= params.bfsize) {
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fprintf(stderr, "send buffer too small\n");
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return -1;
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}
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FILE *file;
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if (pidfile) {
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file = fopen(pidfile, "w");
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if (!file) {
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perror("fopen");
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return -1;
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}
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}
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if (daemon) {
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daemonize();
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}
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if (pidfile) {
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fprintf(file, "%d", getpid());
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fclose(file);
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}
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if (!params.def_ttl) {
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int orig_ttl, fd;
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socklen_t tsize = sizeof(orig_ttl);
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if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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perror("socket");
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return -1;
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}
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if (getsockopt(fd, IPPROTO_IP, IP_TTL,
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(char *)&orig_ttl, &tsize) < 0) {
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perror("getsockopt IP_TTL");
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close(fd);
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return -1;
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}
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close(fd);
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params.def_ttl = orig_ttl;
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}
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return listener(s);
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}
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