/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2012, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
- * 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.
*
* ---
*
* host.c: make stream connection to empire
- *
+ *
* Known contributors to this file:
* Dave Pare, 1989
* Steve McClure, 1998
+ * Markus Armbruster, 2005-2009
*/
+#include <config.h>
+
+#include <ctype.h>
+#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <sys/types.h>
-#ifndef _WIN32
-#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>
+#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
-#else
-#include <winsock.h>
-#endif
-#include <ctype.h>
#include "misc.h"
+/* Portability cruft, should become unnecessary eventually */
+#ifndef AI_ADDRCONFIG
+#define AI_ADDRCONFIG 0
+#endif
+
+#ifdef HAVE_GETADDRINFO
+/*
+ * Inspired by example code from W. Richard Stevens: UNIX Network
+ * Programming, Vol. 1
+ */
+
int
-hostaddr(name, addr)
-s_char *name;
-struct sockaddr_in *addr;
+tcp_connect(char *host, char *serv)
+{
+ int sockfd, n;
+ struct addrinfo hints, *res, *ressave;
+
+ memset(&hints, 0, sizeof(struct addrinfo));
+ hints.ai_flags = AI_ADDRCONFIG;
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+
+ if ((n = getaddrinfo(host, serv, &hints, &res)) != 0) {
+ fprintf(stderr, "Can't connect to %s:%s: %s\n",
+ host, serv, gai_strerror(n));
+ exit(1);
+ }
+ ressave = res;
+
+ do {
+ sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+ if (sockfd < 0)
+ continue; /* ignore this one */
+
+ if (connect(sockfd, res->ai_addr, res->ai_addrlen) == 0)
+ break; /* success */
+ close(sockfd); /* ignore this one */
+ } while ((res = res->ai_next) != NULL);
+
+ if (res == NULL) { /* errno set from final connect() */
+ fprintf(stderr, "Can't connect to %s:%s: %s\n",
+ host, serv, strerror(errno));
+ exit(1);
+ }
+
+ freeaddrinfo(ressave);
+
+ return sockfd;
+}
+
+#else /* !HAVE_GETADDRINFO */
+
+static int
+hostaddr(char *name, struct sockaddr_in *addr)
{
struct hostent *hp;
- if (name == 0 || *name == 0)
+ if (name == NULL || *name == 0)
return 0;
if (isdigit(*name)) {
addr->sin_addr.s_addr = inet_addr(name);
} else {
hp = gethostbyname(name);
- if (hp == NULL) {
- fprintf(stderr, "%s: No such host\n", name);
+ if (hp == NULL)
return 0;
- }
memcpy(&addr->sin_addr, hp->h_addr, sizeof(addr->sin_addr));
-#ifdef _WIN32
- printf("Trying to connect to '%s'\n", inet_ntoa(addr->sin_addr));
- fflush(stdout);
-#endif
}
return 1;
}
-int
-hostport(name, addr)
-s_char *name;
-struct sockaddr_in *addr;
+static int
+hostport(char *name, struct sockaddr_in *addr)
{
struct servent *sp;
- if (name == 0 || *name == 0)
+ if (name == NULL || *name == 0)
return 0;
if (isdigit(*name)) {
-#ifndef _WIN32
addr->sin_port = htons(atoi(name));
-#else
- addr->sin_port = atoi(name);
- addr->sin_port = htons(addr->sin_port);
-#endif
} else {
sp = getservbyname(name, "tcp");
if (sp == NULL)
return 1;
}
-int
-hostconnect(addr)
-struct sockaddr_in *addr;
+static int
+hostconnect(struct sockaddr_in *addr)
{
+ /* FIXME should attempt connect to all addresses of multi-homed host, not just 1st */
int s;
s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0) {
-#ifdef _WIN32
- errno = WSAGetLastError();
-#endif
- perror("socket");
return -1;
}
addr->sin_family = AF_INET;
if (connect(s, (struct sockaddr *)addr, sizeof(*addr)) < 0) {
-#ifdef _WIN32
- errno = WSAGetLastError();
-#endif
- perror("connect");
-#ifdef _WIN32
- printf("Check that your EMPIREHOST and EMPIREPORT are correct.\n");
-#endif
(void)close(s);
return -1;
}
return s;
}
+
+int
+tcp_connect(char *host, char *serv)
+{
+ struct sockaddr_in sin;
+ int sock;
+
+ if (!hostport(serv, &sin)) {
+ fprintf(stderr, "Can't resolve Empire port %s\n", serv);
+ exit(1);
+ }
+ if (!hostaddr(host, &sin)) {
+ fprintf(stderr, "Can't resolve Empire host %s\n", host);
+ exit(1);
+ }
+ if ((sock = hostconnect(&sin)) < 0) {
+ fprintf(stderr, "Can't connect to %s:%s: %s\n",
+ serv, host, strerror(errno));
+ exit(1);
+ }
+ return sock;
+}
+#endif
projects / empserver / blobdiff