corrected call to gnutls_error_is_fatal().
[gnutls.git] / src / socket.c
blobc4d40012f06d3df903d28ff9f34ab41c490bc0aa
1 /*
2 * Copyright (C) 2000-2012 Free Software Foundation, Inc.
4 * This file is part of GnuTLS.
6 * GnuTLS 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 3 of the License, or
9 * (at your option) any later version.
11 * GnuTLS 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, see <http://www.gnu.org/licenses/>.
20 #include <config.h>
22 #if HAVE_SYS_SOCKET_H
23 # include <sys/socket.h>
24 #elif HAVE_WS2TCPIP_H
25 # include <ws2tcpip.h>
26 #endif
27 #include <netdb.h>
28 #include <string.h>
29 #include <errno.h>
30 #include <sys/select.h>
31 #include <sys/types.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <unistd.h>
35 #ifndef _WIN32
36 # include <signal.h>
37 #endif
38 #include <socket.h>
39 #include "sockets.h"
41 #define MAX_BUF 4096
43 extern unsigned int verbose;
44 /* Functions to manipulate sockets
47 ssize_t
48 socket_recv (const socket_st * socket, void *buffer, int buffer_size)
50 int ret;
52 if (socket->secure)
55 ret = gnutls_record_recv (socket->session, buffer, buffer_size);
57 while (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN);
58 else
61 ret = recv (socket->fd, buffer, buffer_size, 0);
63 while (ret == -1 && errno == EINTR);
65 return ret;
68 ssize_t
69 socket_send (const socket_st * socket, const void *buffer, int buffer_size)
71 int ret;
73 if (socket->secure)
76 ret = gnutls_record_send (socket->session, buffer, buffer_size);
78 while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
79 else
82 ret = send (socket->fd, buffer, buffer_size, 0);
84 while (ret == -1 && errno == EINTR);
86 if (ret > 0 && ret != buffer_size && verbose)
87 fprintf (stderr,
88 "*** Only sent %d bytes instead of %d.\n", ret, buffer_size);
90 return ret;
93 void
94 socket_bye (socket_st * socket)
96 int ret;
97 if (socket->secure)
100 ret = gnutls_bye (socket->session, GNUTLS_SHUT_WR);
101 while (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN);
102 if (ret < 0)
103 fprintf (stderr, "*** gnutls_bye() error: %s\n",
104 gnutls_strerror (ret));
105 gnutls_deinit (socket->session);
106 socket->session = NULL;
109 freeaddrinfo (socket->addr_info);
110 socket->addr_info = socket->ptr = NULL;
112 free (socket->ip);
113 free (socket->hostname);
114 free (socket->service);
116 shutdown (socket->fd, SHUT_RDWR); /* no more receptions */
117 close (socket->fd);
119 socket->fd = -1;
120 socket->secure = 0;
123 void
124 socket_connect (const socket_st * hd)
126 int err;
128 printf ("Connecting to '%s:%s'...\n", hd->ip, hd->service);
130 err = connect (hd->fd, hd->ptr->ai_addr, hd->ptr->ai_addrlen);
131 if (err < 0)
133 fprintf (stderr, "Cannot connect to %s:%s: %s\n", hd->hostname,
134 hd->service, strerror (errno));
135 exit (1);
139 void
140 socket_open (socket_st * hd, const char *hostname, const char *service, int udp)
142 struct addrinfo hints, *res, *ptr;
143 int sd, err;
144 char buffer[MAX_BUF + 1];
145 char portname[16] = { 0 };
147 printf ("Resolving '%s'...\n", hostname);
148 /* get server name */
149 memset (&hints, 0, sizeof (hints));
150 hints.ai_socktype = udp ? SOCK_DGRAM : SOCK_STREAM;
151 if ((err = getaddrinfo (hostname, service, &hints, &res)))
153 fprintf (stderr, "Cannot resolve %s:%s: %s\n", hostname, service,
154 gai_strerror (err));
155 exit (1);
158 sd = -1;
159 for (ptr = res; ptr != NULL; ptr = ptr->ai_next)
161 sd = socket (ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol);
162 if (sd == -1)
163 continue;
165 if ((err = getnameinfo (ptr->ai_addr, ptr->ai_addrlen, buffer, MAX_BUF,
166 portname, sizeof (portname),
167 NI_NUMERICHOST | NI_NUMERICSERV)) != 0)
169 fprintf (stderr, "getnameinfo(): %s\n", gai_strerror (err));
170 freeaddrinfo (res);
171 exit (1);
174 break;
177 if (sd == -1)
179 fprintf (stderr, "socket(): %s\n", strerror (errno));
180 exit (1);
183 if (hints.ai_socktype == SOCK_DGRAM)
185 #if defined(IP_DONTFRAG)
186 int yes = 1;
187 if (setsockopt (sd, IPPROTO_IP, IP_DONTFRAG,
188 (const void *) &yes, sizeof (yes)) < 0)
189 perror ("setsockopt(IP_DF) failed");
190 #elif defined(IP_MTU_DISCOVER)
191 int yes = IP_PMTUDISC_DO;
192 if (setsockopt(sd, IPPROTO_IP, IP_MTU_DISCOVER,
193 (const void*) &yes, sizeof (yes)) < 0)
194 perror ("setsockopt(IP_DF) failed");
195 #endif
198 hd->secure = 0;
199 hd->fd = sd;
200 hd->hostname = strdup (hostname);
201 hd->ip = strdup (buffer);
202 hd->service = strdup (portname);
203 hd->ptr = ptr;
204 hd->addr_info = res;
206 return;
209 void
210 sockets_init (void)
212 #ifdef _WIN32
213 WORD wVersionRequested;
214 WSADATA wsaData;
216 wVersionRequested = MAKEWORD (1, 1);
217 if (WSAStartup (wVersionRequested, &wsaData) != 0)
219 perror ("WSA_STARTUP_ERROR");
221 #else
222 signal (SIGPIPE, SIG_IGN);
223 #endif