I2Addr CreateListenSocket(I2Addr addr, char* serv, int options, int buf_size) {
int fd = -1;
socklen_t optlen;
int set_size;
if (addr && (I2AddrFD(addr) > -1)) {
log_println(1, "Invalid I2Addr record - fd already specified.");
goto error;
}
if ((!addr) &&
!(addr = I2AddrByWildcard(get_errhandle(), SOCK_STREAM, serv))) {
log_println(1, "Unable to create I2Addr record by wildcard.");
goto error;
}
if (!I2AddrSetPassive(addr, True)) {
log_println(1, "Unable to set passive mode in I2Addr record.");
goto error;
}
// create and bind socket using arguments, prefering v6 (since v6 addresses
// can be both v4 and v6).
#ifdef AF_INET6
if ((options & OPT_IPV4_ONLY) == 0)
fd = OpenSocket(addr, serv, AF_INET6, options);
#endif
if (fd < 0)
if ((options & OPT_IPV6_ONLY) == 0)
fd = OpenSocket(addr, serv, AF_INET, options);
if (fd < 0) {
log_println(1, "Unable to open socket.");
goto error;
}
/* Set sock opt code from Marion Nakanson <[email protected]
* OHSU Advanced Computing Center
* email on 2/19/09 correctly notes that setsockops must be made before open()
* or listen() calls are made
*/
optlen = sizeof(set_size);
// get send buffer size
getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &set_size, &optlen);
log_print(5, "\nSend buffer initialized to %d, ", set_size);
// get receive buffer size
getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &set_size, &optlen);
log_println(5, "Receive buffer initialized to %d", set_size);
// now assign buffer sizes passed as arguments
if (buf_size > 0) {
setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &buf_size, sizeof(buf_size));
setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &buf_size, sizeof(buf_size));
// print values set to help user verify
getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &set_size, &optlen);
log_print(5, "Changed buffer sizes: Send buffer set to %d(%d), ",
set_size, buf_size);
getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &set_size, &optlen);
log_println(5, "Receive buffer set to %d(%d)", set_size, buf_size);
}
// listen on socket for connections, with backlog queue length = NDT_BACKLOG
if (listen(fd, NDT_BACKLOG) < 0) { // if listen returns value <0, then error
log_println(1, "listen(%d,%d):%s", fd, NDT_BACKLOG, strerror(errno));
goto error;
}
return addr;
// If error, try freeing memory
error:
I2AddrFree(addr);
return NULL;
}
I2Addr
CreateListenSocket(I2Addr addr, char* serv, int options, int buf_size)
{
int fd = -1;
socklen_t optlen;
int set_size;
if (addr && (I2AddrFD(addr) > -1)) {
log_println(1, "Invalid I2Addr record - fd already specified.");
goto error;
}
if ((!addr) && !(addr = I2AddrByWildcard(get_errhandle(), SOCK_STREAM, serv))) {
log_println(1, "Unable to create I2Addr record by wildcard.");
goto error;
}
if (!I2AddrSetPassive(addr,True)) {
log_println(1, "Unable to set passive mode in I2Addr record.");
goto error;
}
fd = OpenSocket(addr, serv, options);
if (fd < 0) {
log_println(1, "Unable to open socket.");
goto error;
}
/* Set sock opt code from Marion Nakanson <[email protected]
* OHSU Advanced Computing Center
* email on 2/19/09 correctly notes that setsockops must be made before open()
* or listen() calls are made
*/
optlen = sizeof(set_size);
getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &set_size, &optlen);
log_print(5, "\nSend buffer initialized to %d, ", set_size);
getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &set_size, &optlen);
log_println(5, "Receive buffer initialized to %d", set_size);
if (buf_size > 0) {
setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &buf_size, sizeof(buf_size));
setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &buf_size, sizeof(buf_size));
getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &set_size, &optlen);
log_print(5, "Changed buffer sizes: Send buffer set to %d(%d), ", set_size, buf_size);
getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &set_size, &optlen);
log_println(5, "Receive buffer set to %d(%d)", set_size, buf_size);
}
if (listen(fd, NDT_BACKLOG) < 0) {
log_println(1, "listen(%d,%d):%s", fd, NDT_BACKLOG, strerror(errno));
goto error;
}
return addr;
error:
I2AddrFree(addr);
return NULL;
}
