2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2009, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * host.c: make stream connection to empire
30 * Known contributors to this file:
33 * Markus Armbruster, 2005-2009
44 #include <sys/types.h>
45 #include <sys/socket.h>
46 #include <netinet/in.h>
47 #include <arpa/inet.h>
53 /* Portability cruft, should become unnecessary eventually */
55 #define AI_ADDRCONFIG 0
58 #ifdef HAVE_GETADDRINFO
60 * Inspired by example code from W. Richard Stevens: UNIX Network
65 tcp_connect(char *host, char *serv)
68 struct addrinfo hints, *res, *ressave;
70 memset(&hints, 0, sizeof(struct addrinfo));
71 hints.ai_flags = AI_ADDRCONFIG;
72 hints.ai_family = AF_UNSPEC;
73 hints.ai_socktype = SOCK_STREAM;
75 if ((n = getaddrinfo(host, serv, &hints, &res)) != 0) {
76 fprintf(stderr, "Can't connect to %s:%s: %s\n",
77 host, serv, gai_strerror(n));
83 sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
85 continue; /* ignore this one */
87 if (connect(sockfd, res->ai_addr, res->ai_addrlen) == 0)
89 close(sockfd); /* ignore this one */
90 } while ((res = res->ai_next) != NULL);
92 if (res == NULL) { /* errno set from final connect() */
93 fprintf(stderr, "Can't connect to %s:%s: %s\n",
94 host, serv, strerror(errno));
98 freeaddrinfo(ressave);
103 #else /* !HAVE_GETADDRINFO */
106 hostaddr(char *name, struct sockaddr_in *addr)
110 if (name == NULL || *name == 0)
112 if (isdigit(*name)) {
113 addr->sin_addr.s_addr = inet_addr(name);
115 hp = gethostbyname(name);
118 memcpy(&addr->sin_addr, hp->h_addr, sizeof(addr->sin_addr));
124 hostport(char *name, struct sockaddr_in *addr)
128 if (name == NULL || *name == 0)
130 if (isdigit(*name)) {
131 addr->sin_port = htons(atoi(name));
133 sp = getservbyname(name, "tcp");
136 addr->sin_port = sp->s_port;
142 hostconnect(struct sockaddr_in *addr)
144 /* FIXME should attempt connect to all addresses of multi-homed host, not just 1st */
147 s = socket(AF_INET, SOCK_STREAM, 0);
151 addr->sin_family = AF_INET;
152 if (connect(s, (struct sockaddr *)addr, sizeof(*addr)) < 0) {
160 tcp_connect(char *host, char *serv)
162 struct sockaddr_in sin;
165 if (!hostport(serv, &sin)) {
166 fprintf(stderr, "Can't resolve Empire port %s\n", serv);
169 if (!hostaddr(host, &sin)) {
170 fprintf(stderr, "Can't resolve Empire host %s\n", host);
173 if ((sock = hostconnect(&sin)) < 0) {
174 fprintf(stderr, "Can't connect to %s:%s: %s\n",
175 serv, host, strerror(errno));