/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2005, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Copyright (C) 1986-2009, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program is free software; you can redistribute it and/or modify
*
* ---
*
- * See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
- * related information and legal notices. It is expected that any future
- * projects/authors will amend these files as needed.
+ * See files README, COPYING and CREDITS in the root of the source
+ * tree for related information and legal notices. It is expected
+ * that future projects/authors will amend these files as needed.
*
* ---
*
* tcp_listen.c: Create a socket and listen on it
- *
+ *
* Known contributors to this file:
- * Markus Armbruster, 2005
+ * Markus Armbruster, 2005-2009
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
-#ifdef _WIN32
-#define WIN32
-#undef NS_ALL
-#include "winsock2.h"
-#else
#include <sys/socket.h>
-#include <netdb.h>
-#include <arpa/inet.h>
#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
#include <unistd.h>
-#endif
#include "prototypes.h"
-static int cant_listen(char *, char *, const char *);
+/* Portability cruft, should become unnecessary eventually */
+#ifndef AI_ADDRCONFIG
+#define AI_ADDRCONFIG 0
+#endif
+
+static void cant_listen(char *, char *, const char *);
int
tcp_listen(char *host, char *serv, size_t *addrlenp)
struct addrinfo hints, *res, *ressave;
memset(&hints, 0, sizeof(struct addrinfo));
- hints.ai_flags = AI_PASSIVE;
+ hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if (fd < 0)
continue; /* error, try next one */
-#ifndef _WIN32
- /*
- * SO_REUSEADDR requests to permit another bind even when the
- * port is still in state TIME_WAIT. Windows' SO_REUSEADDR is
- * broken: it makes bind() succeed no matter what, even if
- * there's another server running on the same port. Luckily,
- * bind() seems to be broken as well: it seems to suceed while
- * the port in state TIME_WAIT by default; thus we get the
- * behavior we want by not setting SO_REUSEADDR.
- */
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
cant_listen(host, serv, strerror(errno));
-#endif
if (bind(fd, res->ai_addr, res->ai_addrlen) == 0)
break; /* success */
}
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
cant_listen(host, serv, strerror(errno));
-#ifndef _WIN32
- /* see comment on setsockopt() above */
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
cant_listen(host, serv, strerror(errno));
-#endif
if (bind(fd, (struct sockaddr *)&sin, sizeof(sin)) < 0)
cant_listen(host, serv, strerror(errno));
if (listen(fd, SOMAXCONN) < 0)
return fd;
}
-
-static int
+static void
cant_listen(char *host, char *serv, const char *err)
{
- fprintf(stderr, "Can't listen on %s:%s: %s", host, serv, err);
+ fprintf(stderr, "Can't listen on %s%s%s: %s\n",
+ host ? host : "", host ? ":" : "", serv, err);
exit(1);
}