mirror of
https://github.com/hufrea/byedpi.git
synced 2024-12-22 06:15:14 +00:00
wait_send after split, oob, etc; handle different send ret
This commit is contained in:
ruti
parent
56a9043dd6
commit
b0d624136e
148
desync.c
148
desync.c
@ -12,6 +12,7 @@
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#ifdef __linux__
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#include <sys/mman.h>
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#include <sys/sendfile.h>
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#include <desync.h>
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#ifdef MFD_CLOEXEC
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#include <sys/syscall.h>
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@ -26,6 +27,7 @@
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#include <ws2tcpip.h>
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#include <mswsock.h>
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#endif
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#define STR_MODE
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#include <params.h>
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#include <packets.h>
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@ -80,27 +82,23 @@ static inline void delay(long ms)
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void wait_send(int sfd)
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{
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for (int i = 0; params.wait_send; i++) {
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struct {
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uint8_t state;
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uint8_t r[3];
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uint32_t rr[35];
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uint32_t notsent_bytes;
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} tcpi = {};
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struct tcpi tcpi = {};
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socklen_t ts = sizeof(tcpi);
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if (getsockopt(sfd, IPPROTO_TCP,
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TCP_INFO, (char *)&tcpi, &ts) < 0) {
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perror("getsockopt TCP_INFO");
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break;
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}
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if (tcpi.state != 1) {
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LOG(LOG_E, "state: %d\n", tcpi.state);
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return;
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}
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if (ts < sizeof(tcpi)) {
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LOG(LOG_E, "tcpi_notsent_bytes not provided\n");
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params.wait_send = 0;
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break;
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}
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if (tcpi.state != 1) {
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LOG(LOG_E, "state: %d\n", tcpi.state);
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return;
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}
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if (tcpi.notsent_bytes == 0) {
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return;
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}
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@ -109,12 +107,15 @@ void wait_send(int sfd)
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}
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delay(params.sfdelay);
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}
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#define wait_send_if_support(sfd) \
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if (params.wait_send) wait_send(sfd)
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#else
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#define wait_send(sfd) delay(params.sfdelay)
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#define wait_send_if_support(sfd) // :(
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#endif
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#ifdef __linux__
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int send_fake(int sfd, char *buffer,
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ssize_t send_fake(int sfd, char *buffer,
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int cnt, long pos, int fa, struct desync_params *opt)
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{
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struct packet pkt = cnt != IS_HTTP ? fake_tls : fake_http;
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@ -126,9 +127,9 @@ int send_fake(int sfd, char *buffer,
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return -1;
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}
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char *p = 0;
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int status = -1;
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ssize_t len = -1;
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while (status) {
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while (1) {
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if (ftruncate(ffd, pos) < 0) {
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uniperror("ftruncate");
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break;
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@ -150,7 +151,8 @@ int send_fake(int sfd, char *buffer,
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perror("setsockopt IP_OPTIONS");
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break;
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}
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if (sendfile(sfd, ffd, 0, pos) < 0) {
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len = sendfile(sfd, ffd, 0, pos);
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if (len < 0) {
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uniperror("sendfile");
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break;
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}
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@ -166,16 +168,16 @@ int send_fake(int sfd, char *buffer,
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perror("setsockopt IP_OPTIONS");
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break;
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}
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status = 0;
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break;
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}
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if (p) munmap(p, pos);
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close(ffd);
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return status;
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return len;
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}
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#endif
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#ifdef _WIN32
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int send_fake(int sfd, char *buffer,
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ssize_t send_fake(int sfd, char *buffer,
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int cnt, long pos, int fa, struct desync_params *opt)
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{
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struct packet pkt = cnt != IS_HTTP ? fake_tls : fake_http;
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@ -202,9 +204,9 @@ int send_fake(int sfd, char *buffer,
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}
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OVERLAPPED ov = {};
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int status = -1;
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ssize_t len = -1;
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while (status) {
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while (1) {
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ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
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if (!ov.hEvent) {
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uniperror("CreateEvent");
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@ -235,7 +237,7 @@ int send_fake(int sfd, char *buffer,
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if (opt->ip_options
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&& setsockopt(sfd, IPPROTO_IP, IP_OPTIONS,
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opt->ip_options, opt->ip_options_len) < 0) {
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perror("setsockopt IP_OPTIONS");
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uniperror("setsockopt IP_OPTIONS");
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break;
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}
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if (!TransmitFile(sfd, hfile, pos, pos, &ov,
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@ -246,7 +248,7 @@ int send_fake(int sfd, char *buffer,
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break;
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}
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}
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delay(params.sfdelay);
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wait_send(sfd);
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if (SetFilePointer(hfile, 0, 0, FILE_BEGIN) == INVALID_SET_FILE_POINTER) {
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uniperror("SetFilePointer");
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@ -262,10 +264,11 @@ int send_fake(int sfd, char *buffer,
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if (opt->ip_options
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&& setsockopt(sfd, IPPROTO_IP, IP_OPTIONS,
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opt->ip_options, 0) < 0) {
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perror("setsockopt IP_OPTIONS");
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uniperror("setsockopt IP_OPTIONS");
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break;
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}
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status = 0;
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len = pos;
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break;
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}
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if (!CloseHandle(hfile)) {
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uniperror("CloseHandle hfile");
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@ -273,11 +276,11 @@ int send_fake(int sfd, char *buffer,
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if (ov.hEvent && !CloseHandle(ov.hEvent)) {
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uniperror("CloseHandle hEvent");
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}
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return status;
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return len;
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}
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#endif
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int send_oob(int sfd, char *buffer,
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ssize_t send_oob(int sfd, char *buffer,
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ssize_t n, long pos)
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{
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ssize_t size = oob_data.size - 1;
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@ -286,42 +289,53 @@ int send_oob(int sfd, char *buffer,
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char rchar = buffer[pos];
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buffer[pos] = oob_data.data[0];
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if (send(sfd, buffer, pos + 1, MSG_OOB) < 0) {
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ssize_t len = send(sfd, buffer, pos + 1, MSG_OOB);
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buffer[pos] = rchar;
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if (len < 0) {
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uniperror("send");
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buffer[pos] = rchar;
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return -1;
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}
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buffer[pos] = rchar;
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wait_send(sfd);
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len--;
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if (len != pos) {
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return len;
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}
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if (size) {
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wait_send(sfd);
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}
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for (long i = 0; i < size; i++) {
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if (send(sfd, data + i, 1, MSG_OOB) < 0) {
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uniperror("send");
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return -1;
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if (get_e() == EAGAIN) {
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return len;
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}
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}
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if (size != 1) {
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wait_send(sfd);
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}
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wait_send(sfd);
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}
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return 0;
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return len;
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}
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int send_disorder(int sfd,
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ssize_t send_disorder(int sfd,
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char *buffer, long pos, int fa)
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{
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int bttl = 1;
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int status = 0;
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if (setttl(sfd, bttl, fa) < 0) {
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return -1;
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}
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if (send(sfd, buffer, pos, 0) < 0) {
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ssize_t len = send(sfd, buffer, pos, 0);
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if (len < 0) {
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uniperror("send");
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status = -1;
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}
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wait_send_if_support(sfd);
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if (setttl(sfd, params.def_ttl, fa) < 0) {
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return -1;
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}
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return status;
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return len;
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}
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@ -333,7 +347,7 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
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char *host = 0;
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int len = 0, type = 0;
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int fa = get_family(dst);
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// parse packet
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if ((len = parse_tls(buffer, n, &host))) {
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type = IS_HTTPS;
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}
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@ -344,7 +358,7 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
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LOG(LOG_S, "host: %.*s (%ld)\n",
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len, host, host - buffer);
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}
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// modify packet
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if (type == IS_HTTP && dp.mod_http) {
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LOG(LOG_S, "modify HTTP: n=%ld\n", n);
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if (mod_http(buffer, n, dp.mod_http)) {
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@ -378,19 +392,22 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
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lp = pos + 5;
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}
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}
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// set custom TTL
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if (params.custom_ttl) {
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if (setttl(sfd, params.def_ttl, fa) < 0) {
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return -1;
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}
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}
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// desync
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long lp = offset;
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if (!type && params.de_known) {
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// cancel
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}
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else for (int i = 0; i < dp.parts_n; i++) {
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struct part part = dp.parts[i];
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// change pos
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long pos = part.pos;
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if (part.flag == OFFSET_SNI) {
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if (type != IS_HTTPS)
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@ -415,39 +432,46 @@ ssize_t desync(int sfd, char *buffer, size_t bfsize,
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LOG(LOG_E, "split cancel: pos=%ld-%ld, n=%ld\n", lp, pos, n);
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break;
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}
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LOG(LOG_S, "split: pos=%ld-%ld, m=%d\n", lp, pos, part.m);
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// send part
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LOG(LOG_S, "split: pos=%ld-%ld, m: %s\n", lp, pos, demode_str[part.m]);
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int s = 0;
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ssize_t s = 0;
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switch (part.m) {
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#ifdef FAKE_SUPPORT
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case DESYNC_FAKE:
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s = send_fake(sfd,
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buffer + lp, type, pos - lp, fa, &dp);
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break;
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#endif
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case DESYNC_DISORDER:
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s = send_disorder(sfd,
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buffer + lp, pos - lp, fa);
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break;
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#ifdef FAKE_SUPPORT
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case DESYNC_FAKE:
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s = send_fake(sfd,
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buffer + lp, type, pos - lp, fa, &dp);
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break;
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#endif
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case DESYNC_DISORDER:
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s = send_disorder(sfd,
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buffer + lp, pos - lp, fa);
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break;
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case DESYNC_OOB:
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s = send_oob(sfd,
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buffer + lp, n - lp, pos - lp);
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break;
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case DESYNC_OOB:
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s = send_oob(sfd,
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buffer + lp, n - lp, pos - lp);
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wait_send_if_support(sfd);
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break;
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case DESYNC_SPLIT:
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default:
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s = send(sfd, buffer + lp, pos - lp, 0);
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case DESYNC_SPLIT:
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default:
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s = send(sfd, buffer + lp, pos - lp, 0);
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wait_send_if_support(sfd);
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}
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if (s < 0) {
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if (part.m != DESYNC_FAKE
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&& get_e() == EAGAIN) {
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if (get_e() == EAGAIN) {
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return lp;
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}
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return -1;
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}
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else if (s != (pos - lp)) {
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LOG(LOG_E, "%ld != %ld\n", s, pos - lp);
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return lp + s;
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}
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lp = pos;
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}
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// send all/rest
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if (lp < n) {
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LOG((lp ? LOG_S : LOG_L), "send: pos=%ld-%ld\n", lp, n);
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if (send(sfd, buffer + lp, n - lp, 0) < 0) {
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9
desync.h
9
desync.h
@ -1 +1,10 @@
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ssize_t desync(int sfd, char *buffer, size_t bfsize, ssize_t n, ssize_t offset, struct sockaddr *dst, int dp_c);
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struct tcpi {
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uint8_t state;
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uint8_t r[3];
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uint32_t rr[5];
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uint32_t unacked;
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uint32_t rrr[29];
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uint32_t notsent_bytes;
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};
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18
main.c
18
main.c
@ -22,7 +22,7 @@
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#define close(fd) closesocket(fd)
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#endif
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#define VERSION 6
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#define VERSION 7
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#define MPOOL_INC 16
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@ -35,6 +35,7 @@ fake_http = {
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oob_data = {
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1, "a"
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};
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char ip_option[1] = "\0";
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struct params params = {
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@ -65,7 +66,7 @@ const char help_text[] = {
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" -N, --no-domain Deny domain resolving\n"
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" -I --conn-ip <ip> Connection binded IP, default ::\n"
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" -b, --buf-size <size> Buffer size, default 16384\n"
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" -x, --debug Print logs, 0, 1 or 2\n"
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" -x, --debug <level> Print logs, 0, 1 or 2\n"
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" -g, --def-ttl <num> TTL for all outgoing connections\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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@ -86,7 +87,7 @@ const char help_text[] = {
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#ifdef FAKE_SUPPORT
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" -f, --fake <n[+s]> Split and send fake packet\n"
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" -t, --ttl <num> TTL of fake packets, default 8\n"
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" -k, --ip-opt <f|:str> IP options of fake packets\n"
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" -k, --ip-opt [f|:str] IP options of fake packets\n"
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" -l, --fake-tls <f|:str>\n"
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" -j, --fake-http <f|:str> Set custom fake packet\n"
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" -n, --tls-sni <str> Change SNI in fake ClientHello\n"
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@ -125,7 +126,7 @@ const struct option options[] = {
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#ifdef FAKE_SUPPORT
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{"fake", 1, 0, 'f'},
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{"ttl", 1, 0, 't'},
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{"ip-opt", 1, 0, 'k'},
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{"ip-opt", 2, 0, 'k'},
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{"fake-tls", 1, 0, 'l'},
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{"fake-http", 1, 0, 'j'},
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{"tls-sni", 1, 0, 'n'},
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@ -489,7 +490,12 @@ int main(int argc, char **argv)
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break;
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case 'k':
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dp->ip_options = ftob(optarg, &dp->ip_options_len);
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if (optarg)
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dp->ip_options = ftob(optarg, &dp->ip_options_len);
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else {
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dp->ip_options = ip_option;
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dp->ip_options_len = sizeof(ip_option);
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}
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if (!dp->ip_options) {
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uniperror("read/parse");
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return -1;
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@ -573,7 +579,7 @@ int main(int argc, char **argv)
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}
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break;
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case 'w': //
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case 'V': //
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params.sfdelay = strtol(optarg, &end, 0);
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if (params.sfdelay < 0 || optarg == end
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|| params.sfdelay >= 1000 || *end)
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12
params.h
12
params.h
@ -23,6 +23,16 @@ enum demode {
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DESYNC_FAKE
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};
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#ifdef STR_MODE
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char *demode_str[] = {
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"DESYNC_NONE",
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"DESYNC_SPLIT",
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"DESYNC_DISORDER",
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"DESYNC_OOB",
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"DESYNC_FAKE"
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};
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#endif
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struct part {
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int m;
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int flag;
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@ -77,3 +87,5 @@ struct spos {
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ssize_t start, end, size;
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char *data;
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};
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extern char ip_option[1];
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12
readme.txt
12
readme.txt
@ -35,6 +35,11 @@ $ ./ciadpi --disorder 3 -A --tlsrec 1+s
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Отключить запутывание для нераспознанных протоколов
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Распознаваемые протоколы: HTTP и TLS с SNI
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-F, --tfo
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Включает TCP Fast Open
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Если сервер его поддерживает, то первый пакет будет отправлен сразу вместе с SYN
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Поддерживается только в Linux (4.11+)
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-A, --auto
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Автоматический режим
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Если сервер сбросил подключение, превышено время ожидания, сработал --tr,
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@ -42,7 +47,7 @@ $ ./ciadpi --disorder 3 -A --tlsrec 1+s
|
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Можно указывать несколько групп параметров, раделяя их данным флагом
|
||||
Если соединение успешно прошло, то параметры для данного IP будут закешированны
|
||||
Параметры, которые можно вынести в отдельную группу:
|
||||
split, disorder, oob, fake, ttl, mod-http, tlsrec
|
||||
split, disorder, oob, fake, ttl, ip-opt, mod-http, tlsrec
|
||||
|
||||
-u, --cache-ttl <sec>
|
||||
Время жизни значения в кеше, по умолчанию 100800 (28 часов)
|
||||
@ -79,6 +84,11 @@ $ ./ciadpi --disorder 3 -A --tlsrec 1+s
|
||||
TTL для поддельного пакета, по умолчанию 8
|
||||
Необходимо подобрать такое значение, чтобы пакет не дошел до сервера, но был обработан DPI
|
||||
|
||||
-k, --ip-opt [file|:str]
|
||||
Установить опции для фейкового IP пакета
|
||||
Существенно снизит вероятность, что пакет дойдет до сервера
|
||||
Стоит учесть, что до DPI он также может не дойти
|
||||
|
||||
-l, --fake-tls <file|:str>
|
||||
-j, --fake-http <file|:str>
|
||||
Указать свои поддельные пакеты, вместо дефолтных
|
||||
|
||||
Loading…
Reference in New Issue
Block a user