mirror of
https://github.com/irungentoo/toxcore.git
synced 2024-03-22 13:30:51 +08:00
9c03439ad0
Also got rid of two VLAs. They are overused a bit in toxcore. In irc_syncbot, the array was uninitialised and then filled by a recv system call. This can cause uninitialised reads if recv doesn't fill the entire array. It could not cause out of bounds read directly, because a NUL-terminator was in place, but both cases are undefined behaviour.
384 lines
9.6 KiB
C
384 lines
9.6 KiB
C
#define _XOPEN_SOURCE 600
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#include <stdint.h>
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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 <time.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__MACH__)
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#define MSG_NOSIGNAL 0
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#endif
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#if defined(__FreeBSD__) && !defined(MSG_NOSIGNAL)
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#define MSG_NOSIGNAL 0x20000 // only defined on FreeBSD for some __POSIX_VISIBLE, causes compilation failures
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#endif
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//IRC name and channel.
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#define IRC_NAME "Tox_syncbot"
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#define IRC_CHANNEL "#tox-real-ontopic"
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//IRC server ip and port.
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static uint8_t ip[4] = {127, 0, 0, 1};
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static uint16_t port = 6667;
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#define SILENT_TIMEOUT 20
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static int sock;
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#define SERVER_CONNECT "NICK " IRC_NAME "\nUSER " IRC_NAME " 8 * :" IRC_NAME "\n"
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#define CHANNEL_JOIN "JOIN " IRC_CHANNEL "\n"
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/* In toxcore/network.c */
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uint64_t current_time_monotonic(void);
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static uint64_t get_monotime_sec(void)
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{
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return current_time_monotonic() / 1000;
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}
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static int reconnect(void)
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{
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int new_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (new_sock < 0) {
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printf("error socket\n");
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return -1;
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}
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struct sockaddr_storage addr = {0};
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size_t addrsize;
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struct sockaddr_in *addr4 = (struct sockaddr_in *)&addr;
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addrsize = sizeof(struct sockaddr_in);
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addr4->sin_family = AF_INET;
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memcpy(&addr4->sin_addr, ip, 4);
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addr4->sin_port = htons(port);
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if (connect(new_sock, (struct sockaddr *)&addr, addrsize) != 0) {
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printf("error connect\n");
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close(new_sock);
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return -1;
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}
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send(new_sock, SERVER_CONNECT, sizeof(SERVER_CONNECT) - 1, MSG_NOSIGNAL);
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return new_sock;
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}
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#include "../toxcore/ccompat.h"
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#include "../toxcore/tox.h"
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#include "misc_tools.c"
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static int current_group = -1;
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static void callback_group_invite(Tox *tox, uint32_t fid, TOX_CONFERENCE_TYPE type, const uint8_t *data, size_t length,
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void *userdata)
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{
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if (current_group == -1) {
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current_group = tox_conference_join(tox, fid, data, length, NULL);
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}
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}
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static void callback_friend_message(Tox *tox, uint32_t fid, TOX_MESSAGE_TYPE type, const uint8_t *message,
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size_t length,
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void *userdata)
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{
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if (length == 1 && *message == 'c') {
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if (tox_conference_delete(tox, current_group, NULL) == 0) {
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current_group = -1;
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}
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}
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if (length == 1 && *message == 'i') {
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tox_conference_invite(tox, fid, current_group, NULL);
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}
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if (length == 1 && *message == 'j' && sock >= 0) {
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send(sock, CHANNEL_JOIN, sizeof(CHANNEL_JOIN) - 1, MSG_NOSIGNAL);
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}
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}
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static void copy_groupmessage(Tox *tox, uint32_t groupnumber, uint32_t friendgroupnumber, TOX_MESSAGE_TYPE type,
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const uint8_t *message, size_t length,
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void *userdata)
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{
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if (tox_conference_peer_number_is_ours(tox, groupnumber, friendgroupnumber, NULL)) {
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return;
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}
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TOX_ERR_CONFERENCE_PEER_QUERY error;
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size_t namelen = tox_conference_peer_get_name_size(tox, groupnumber, friendgroupnumber, &error);
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uint8_t name[TOX_MAX_NAME_LENGTH];
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tox_conference_peer_get_name(tox, groupnumber, friendgroupnumber, name, NULL);
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if (namelen == 0 || error != TOX_ERR_CONFERENCE_PEER_QUERY_OK) {
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memcpy(name, "<unknown>", 9);
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namelen = 9;
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}
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uint8_t sendbuf[2048];
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uint16_t send_len = 0;
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memcpy(sendbuf, "PRIVMSG " IRC_CHANNEL " :", sizeof("PRIVMSG " IRC_CHANNEL " :"));
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send_len += sizeof("PRIVMSG " IRC_CHANNEL " :") - 1;
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memcpy(sendbuf + send_len, name, namelen);
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send_len += namelen;
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sendbuf[send_len] = ':';
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send_len += 1;
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sendbuf[send_len] = ' ';
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send_len += 1;
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memcpy(sendbuf + send_len, message, length);
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send_len += length;
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unsigned int i;
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for (i = 0; i < send_len; ++i) {
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if (sendbuf[i] == '\n') {
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sendbuf[i] = '|';
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}
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if (sendbuf[i] == 0) {
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sendbuf[i] = ' ';
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}
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}
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sendbuf[send_len] = '\n';
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send_len += 1;
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if (sock >= 0) {
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send(sock, sendbuf, send_len, MSG_NOSIGNAL);
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}
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}
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static void send_irc_group(Tox *tox, uint8_t *msg, uint16_t len)
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{
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if (len > 1350 || len == 0 || len == 1) {
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return;
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}
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--len;
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if (*msg != ':') {
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return;
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}
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VLA(uint8_t, req, len);
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unsigned int i;
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unsigned int spaces = 0;
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for (i = 0; i < (len - 1); ++i) {
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if (msg[i + 1] == ' ') {
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++spaces;
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} else {
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if (spaces >= 3 && msg[i + 1] == ':') {
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break;
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}
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}
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req[i] = msg[i + 1];
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}
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unsigned int req_len = i;
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req[i] = 0;
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VLA(uint8_t, message, len);
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uint16_t length = 0;
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uint8_t *pmsg = (uint8_t *)strstr((char *)req, " PRIVMSG");
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if (pmsg == NULL) {
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return;
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}
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uint8_t *dt;
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for (dt = req, i = 0; dt != pmsg && *dt != '!'; ++dt, ++i) {
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message[i] = *dt;
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++length;
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}
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message[length] = ':';
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length += 1;
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message[length] = ' ';
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length += 1;
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if ((req_len + 2) >= len) {
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return;
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}
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memcpy(message + length, msg + req_len + 2, len - (req_len + 2));
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length += len - (req_len + 2);
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tox_conference_send_message(tox, current_group, TOX_MESSAGE_TYPE_NORMAL, message, length, NULL);
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}
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static Tox *init_tox(int argc, char *argv[])
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{
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uint8_t ipv6enabled = 1; /* x */
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int argvoffset = cmdline_parsefor_ipv46(argc, argv, &ipv6enabled);
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if (argvoffset < 0) {
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exit(1);
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}
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/* with optional --ipvx, now it can be 1-4 arguments... */
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if ((argc != argvoffset + 2) && (argc != argvoffset + 4)) {
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printf("Usage: %s [--ipv4|--ipv6] ip port public_key (of the DHT bootstrap node)\n", argv[0]);
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exit(0);
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}
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Tox *tox = tox_new(0, 0);
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if (!tox) {
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exit(1);
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}
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tox_self_set_name(tox, (const uint8_t *)IRC_NAME, sizeof(IRC_NAME) - 1, 0);
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tox_callback_friend_message(tox, &callback_friend_message);
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tox_callback_conference_invite(tox, &callback_group_invite);
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tox_callback_conference_message(tox, ©_groupmessage);
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char temp_id[128];
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printf("\nEnter the address of irc_syncbots master (38 bytes HEX format):\n");
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if (scanf("%s", temp_id) != 1) {
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exit(1);
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}
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uint16_t bootstrap_port = atoi(argv[argvoffset + 2]);
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unsigned char *binary_string = hex_string_to_bin(argv[argvoffset + 3]);
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tox_bootstrap(tox, argv[argvoffset + 1], bootstrap_port, binary_string, 0);
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free(binary_string);
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uint8_t *bin_id = hex_string_to_bin(temp_id);
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uint32_t num = tox_friend_add(tox, bin_id, (const uint8_t *)"Install Gentoo", sizeof("Install Gentoo") - 1, 0);
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free(bin_id);
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if (num == UINT32_MAX) {
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printf("\nSomething went wrong when adding friend.\n");
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exit(1);
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}
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return tox;
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}
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int main(int argc, char *argv[])
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{
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Tox *tox = init_tox(argc, argv);
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sock = reconnect();
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if (sock < 0) {
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return 1;
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}
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uint64_t last_get = get_monotime_sec();
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int connected = 0, ping_sent = 0;
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while (1) {
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int count = 0;
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ioctl(sock, FIONREAD, &count);
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if (count > 0) {
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last_get = get_monotime_sec();
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ping_sent = 0;
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uint8_t *data = (uint8_t *)calloc(count + 1, 1);
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recv(sock, data, count, MSG_NOSIGNAL);
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printf("%s", data);
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if (!connected) {
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connected = 1;
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}
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if (count > 6 && data[0] == 'P' && data[1] == 'I' && data[2] == 'N' && data[3] == 'G') {
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data[1] = 'O';
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unsigned int i;
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for (i = 0; i < count; ++i) {
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if (data[i] == '\n') {
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++i;
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break;
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}
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}
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send(sock, data, i, MSG_NOSIGNAL);
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}
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unsigned int i, p_i = 0;
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for (i = 1; data[0] == ':' && i < count; ++i) {
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if (data[i] == ' ') {
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if (i + 5 < count && memcmp(data + i, " 404 ", 5) == 0) {
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connected = 1;
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}
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break;
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}
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if (data[i] == ':') {
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break;
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}
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}
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for (i = 0; i < count; ++i) {
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if (data[i] == '\n' && i != 0) {
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send_irc_group(tox, data + p_i, i - p_i);
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p_i = i + 1;
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}
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}
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free(data);
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}
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if (connected == 1) {
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send(sock, CHANNEL_JOIN, sizeof(CHANNEL_JOIN) - 1, MSG_NOSIGNAL);
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connected = 2;
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}
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if (!ping_sent && last_get + (SILENT_TIMEOUT / 2) < get_monotime_sec()) {
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unsigned int p_s = sizeof("PING :test\n") - 1;
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if (send(sock, "PING :test\n", p_s, MSG_NOSIGNAL) == p_s) {
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ping_sent = 1;
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}
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}
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int error = 0;
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socklen_t len = sizeof(error);
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if (sock < 0 || last_get + SILENT_TIMEOUT < get_monotime_sec()
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|| getsockopt(sock, SOL_SOCKET, SO_ERROR, &error, &len) != 0) {
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close(sock);
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printf("reconnect\n");
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sock = reconnect();
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if (sock >= 0) {
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last_get = get_monotime_sec();
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connected = 0;
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ping_sent = 0;
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}
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}
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tox_iterate(tox, NULL);
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usleep(1000 * 50);
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}
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}
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