tcpsock tcpattach(int fd, int listening) {
if(listening == 0) {
struct mill_tcpconn *conn = malloc(sizeof(struct mill_tcpconn));
if(!conn) {
errno = ENOMEM;
return NULL;
}
tcpconn_init(conn, fd);
errno = 0;
return (tcpsock)conn;
}
/* It's a listening socket. Find out the port it is listening on. */
ipaddr addr;
socklen_t sz = sizeof(ipaddr);
int rc = getsockname(fd, (struct sockaddr*)&addr, &sz);
if(rc == -1)
return NULL;
struct mill_tcplistener *l = malloc(sizeof(struct mill_tcplistener));
if(!l) {
errno = ENOMEM;
return NULL;
}
l->sock.type = MILL_TCPLISTENER;
l->fd = fd;
l->port = mill_ipport(addr);
errno = 0;
return &l->sock;
}
tcpsock tcplisten(ipaddr addr, int backlog) {
/* Open the listening socket. */
int s = socket(mill_ipfamily(addr), SOCK_STREAM, 0);
if(s == -1)
return NULL;
mill_tcptune(s);
/* Start listening. */
int rc = bind(s, (struct sockaddr*)&addr, mill_iplen(addr));
if(rc != 0)
return NULL;
rc = listen(s, backlog);
if(rc != 0)
return NULL;
/* If the user requested an ephemeral port,
retrieve the port number assigned by the OS now. */
int port = mill_ipport(addr);
if(!port == 0) {
ipaddr baddr;
socklen_t len = sizeof(ipaddr);
rc = getsockname(s, (struct sockaddr*)&baddr, &len);
if(rc == -1) {
int err = errno;
fdclean(s);
close(s);
errno = err;
return NULL;
}
port = mill_ipport(baddr);
}
/* Create the object. */
struct mill_tcplistener *l = malloc(sizeof(struct mill_tcplistener));
if(!l) {
fdclean(s);
close(s);
errno = ENOMEM;
return NULL;
}
l->sock.type = MILL_TCPLISTENER;
l->fd = s;
l->port = port;
errno = 0;
return &l->sock;
}
struct mill_udpsock *mill_udplisten_(ipaddr addr) {
/* Open the listening socket. */
int s = socket(mill_ipfamily(addr), SOCK_DGRAM, 0);
if(s == -1)
return NULL;
mill_udptune(s);
/* Start listening. */
int rc = bind(s, (struct sockaddr*)&addr, mill_iplen(addr));
if(rc != 0)
return NULL;
/* If the user requested an ephemeral port,
retrieve the port number assigned by the OS now. */
int port = mill_ipport(addr);
if(port) {
ipaddr baddr;
socklen_t len = sizeof(ipaddr);
rc = getsockname(s, (struct sockaddr*)&baddr, &len);
if(rc == -1) {
int err = errno;
fdclean(s);
close(s);
errno = err;
return NULL;
}
port = mill_ipport(baddr);
}
/* Create the object. */
struct mill_udpsock *us = malloc(sizeof(struct mill_udpsock));
if(!us) {
fdclean(s);
close(s);
errno = ENOMEM;
return NULL;
}
us->fd = s;
us->port = port;
errno = 0;
return us;
}
int tcpport(tcpsock s) {
if(s->type == MILL_TCPCONN) {
struct mill_tcpconn *c = (struct mill_tcpconn*)s;
return mill_ipport(c->addr);
}
else if(s->type == MILL_TCPLISTENER) {
struct mill_tcplistener *l = (struct mill_tcplistener*)s;
return l->port;
}
mill_assert(0);
}