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#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <syslog.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netdb.h>
#include <pthread.h>
#include <pwd.h>
#include <errno.h>
#include "packet.h"
#include "netascii.h"
void usage(char* name) {
printf("USAGE: %s -d\n", name);
printf("\td: daemonize\n");
}
int main(int argc, char** argv) {
int daemonize = 0;
int ch = 0;
char addr[16], user[32], group[32];
strcpy(addr, "172.0.0.1");
strcpy(user, "nobody");
strcpy(group, "nobody");
int port = 69;
while ((ch = getopt(argc, argv, "da:p:u:g:h")) != -1) {
switch (ch) {
case 'a':
strcpy(addr, optarg);
break;
case 'p':
port = atoi(optarg);
if ((port <= 0) || (port >= 65536)) {
fprintf(stderr, "invalid port specified.\n");
return -1;
}
break;
case 'd':
daemonize = 1;
break;
case 'g':
if (daemonize) {
strcpy(group, optarg);
} else {
fprintf(stderr, "-g requires -d\n");
return -1;
}
break
case 'u':
if (daemonize) {
strcpy(user, optarg);
} else {
fprintf(stderr, "-u requires -d\n");
return -1;
}
break
case '?': case 'h':
usage(argv[0]);
return -1;
}
}
setlogmask(LOG_UPTO(LOG_INFO));
openlog(argv[0], LOG_PID | LOG_PERROR | LOG_NDELAY, LOG_FTP);
syslog(LOG_INFO, "starting up...");
if (daemonize) {
if (daemon(1, 0)) {
syslog(LOG_ERR, "failed to daemonize as requested!");
return -1;
} else {
syslog(LOG_INFO, "daemonized");
}
}
int s = socket(AF_INET, SOCK_DGRAM, 0);
if (s <= 0) {
syslog(LOG_ERR, "unable to bind socket!");
return -1;
}
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port);
server_addr.sin_addr.s_addr = inet_addr(addr);
//TODO: drop privs!
//TODO: threading!
syslog(LOG_INFO, "program completed successfully!");
close(s);
return 0;
}
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