1*eea8be86SPeter Tyser #include <stdio.h>
2eedcd078Swdenk #include <stdlib.h>
3eedcd078Swdenk #include <unistd.h>
4eedcd078Swdenk #include <sys/socket.h>
5ecf3fb22SWolfgang Denk #include <netinet/in.h>
6eedcd078Swdenk
main(int argc,char * argv[])7eedcd078Swdenk int main (int argc, char *argv[])
8eedcd078Swdenk {
9eedcd078Swdenk int s, len, o, port = 6666;
10eedcd078Swdenk char buf[512];
11eedcd078Swdenk struct sockaddr_in addr;
12fadad157SMike Frysinger socklen_t addr_len = sizeof addr;
13eedcd078Swdenk
14eedcd078Swdenk if (argc > 1)
15eedcd078Swdenk port = atoi (argv[1]);
16eedcd078Swdenk
17eedcd078Swdenk s = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
18eedcd078Swdenk
19eedcd078Swdenk o = 1;
20eedcd078Swdenk len = 4;
21eedcd078Swdenk setsockopt (3, SOL_SOCKET, SO_REUSEADDR, &o, len);
22eedcd078Swdenk
23eedcd078Swdenk addr.sin_family = AF_INET;
24eedcd078Swdenk addr.sin_port = htons (port);
25eedcd078Swdenk addr.sin_addr.s_addr = INADDR_ANY; /* receive broadcasts */
26eedcd078Swdenk
27eedcd078Swdenk bind (s, (struct sockaddr *) &addr, sizeof addr);
28eedcd078Swdenk
29eedcd078Swdenk for (;;) {
30eedcd078Swdenk len = recvfrom (s, buf, sizeof buf, 0, (struct sockaddr *) &addr, &addr_len);
31eedcd078Swdenk if (len < 0)
32eedcd078Swdenk break;
33*eea8be86SPeter Tyser if (write (1, buf, len) != len)
34*eea8be86SPeter Tyser fprintf(stderr, "WARNING: serial characters dropped\n");
35eedcd078Swdenk }
36eedcd078Swdenk
37eedcd078Swdenk return 0;
38eedcd078Swdenk }
39