/* DHT boostrap * * A simple DHT boostrap server for tox (daemon edition) */ #include /* pid_t */ #include /* umask */ #include #include #include /* POSIX things */ #include #include "../../core/DHT.h" #include "../../core/friend_requests.h" /* Sleep function (x = milliseconds) */ #ifdef WIN32 #define c_sleep(x) Sleep(1*x) #else #include #define c_sleep(x) usleep(1000*x) #endif #define PORT 33445 #define USERNAME getenv("USER") #define PIDFILE "/home/%s/.bootstrap_server.pid" /* %s represents the unser's name */ int main(int argc, char *argv[]) { char pidfloc[512]; /* Location of the soon-to-be PID file */ pid_t pid, sid; /* Process- and Session-ID */ FILE *pidf; /* The PID file */ /* Assemble PID file location an try to open the file */ sprintf(pidfloc, PIDFILE, USERNAME); pidf = fopen(pidfloc, "w"); /* Generate new keypair */ new_keys(); /* Public key */ uint32_t i; printf("\nPublic Key: "); for(i = 0; i < 32; i++) { uint8_t ln, hn; ln = 0x0F & self_public_key[i]; hn = 0xF0 & self_public_key[i]; hn = hn >> 4; printf("%X%X", hn, ln); } printf("\n"); /* initialize networking bind to ip 0.0.0.0:PORT */ IP ip; ip.i = 0; init_networking(ip, PORT); /* If there's been an error, exit before forking off */ if (errno != 0) { perror("Error"); printf("Error(s) occured during start-up. Exiting.\n"); exit(EXIT_FAILURE); } // /* Assemble the location of the PID file */ // sprintf(pidfloc, PIDFILE, USERNAME); // pidf = fopen(pidfloc, "w"); // /* Check if we can actually open the file */ // if(pidf == NULL) { // printf("Couldn't open PID-File %s for writing.\n", pidfloc); // exit(EXIT_FAILURE); // } /* Fork off the parent process */ pid = fork(); if (pid < 0) { printf("Forking failed.\n"); exit(EXIT_FAILURE); } /* If we got a good PID, then we can exit the parent process. */ if (pid > 0) { printf("Forked successfully: %d\n", pid); /* Write the PID file */ fprintf(pidf, "%d\n", pid); fclose(pidf); /* Exit parent */ exit(EXIT_SUCCESS); } /* Change the file mode mask */ umask(0); /* Create a new SID for the child process */ sid = setsid(); if (sid < 0) { printf("SID creation failure.\n"); exit(EXIT_FAILURE); } /* Change the current working directory */ if ((chdir("/")) < 0) { exit(EXIT_FAILURE); } /* Go quiet */ close(STDIN_FILENO); close(STDOUT_FILENO); close(STDERR_FILENO); IP_Port ip_port; uint8_t data[MAX_UDP_PACKET_SIZE]; uint32_t length; /* Main loop */ while(1) { doDHT(); while(receivepacket(&ip_port, data, &length) != -1) { DHT_handlepacket(data, length, ip_port); friendreq_handlepacket(data, length, ip_port); } c_sleep(1); } shutdown_networking(); exit(EXIT_SUCCESS); }