/*
* Get a UDP socket, bind it, figure out the port,
* and advertise the port as program "prog".
*
* XXX - it would be nice if you could advertise ascii strings.
*/
int
udp_server(u_long prog, int rdwr)
{
int sock;
struct sockaddr_in s;
if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
perror("socket");
exit(1);
}
sock_optimize(sock, rdwr);
bzero((void*)&s, sizeof(s));
s.sin_family = AF_INET;
#ifdef NO_PORTMAPPER
s.sin_port = htons(prog);
#endif
if (bind(sock, (struct sockaddr*)&s, sizeof(s)) < 0) {
perror("bind");
exit(2);
}
#ifdef PORTMAP
(void)pmap_unset(prog, (u_long)1);
if (!pmap_set(prog, (u_long)1, (u_long)IPPROTO_UDP,
(unsigned short)sockport(sock))) {
perror("pmap_set");
exit(5);
}
#endif
return (sock);
}
/*
* "Connect" to the UCP socket advertised as "prog" on "host" and
* return the connected socket.
*/
int
udp_connect(char *host, u_long prog, int rdwr)
{
struct hostent *h;
struct sockaddr_in sin;
int sock;
#ifndef NO_PORTMAPPER
u_short port;
#endif
if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
perror("socket");
exit(1);
}
sock_optimize(sock, rdwr);
if (!(h = gethostbyname(host))) {
perror(host);
exit(2);
}
bzero((void *) &sin, sizeof(sin));
sin.sin_family = AF_INET;
bcopy((void*)h->h_addr, (void *) &sin.sin_addr, h->h_length);
#ifndef PORTMAP
sin.sin_port = htons(prog);
#else
port = pmap_getport(&sin, prog, (u_long)1, IPPROTO_UDP);
if (!port) {
perror("lib UDP: No port found");
exit(3);
}
sin.sin_port = htons(port);
#endif
if (connect(sock, (struct sockaddr*)&sin, sizeof(sin)) < 0) {
perror("connect");
exit(4);
}
return (sock);
}
/*
* Accept a connection and return it
*/
int
tcp_accept(int sock, int rdwr)
{
struct sockaddr_in s;
int newsock;
socklen_t namelen;
namelen = sizeof(s);
bzero((void*)&s, namelen);
retry:
if ((newsock = accept(sock, (struct sockaddr*)&s, &namelen)) < 0) {
if (errno == EINTR)
goto retry;
perror("accept");
exit(6);
}
#ifdef LIBTCP_VERBOSE
fprintf(stderr, "Server newsock port %d\n", sockport(newsock));
#endif
sock_optimize(newsock, rdwr);
return (newsock);
}