2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* socket-related functions used by s_client and s_server */
16 #include <openssl/opensslconf.h>
19 * With IPv6, it looks like Digital has mixed up the proper order of
20 * recursive header file inclusion, resulting in the compiler complaining
21 * that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is
22 * needed to have fileno() declared correctly... So let's define u_int
24 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
26 typedef unsigned int u_int;
29 #ifndef OPENSSL_NO_SOCK
36 # include <openssl/bio.h>
37 # include <openssl/err.h>
40 * init_client - helper routine to set up socket communication
41 * @sock: pointer to storage of resulting socket.
42 * @host: the host name or path (for AF_UNIX) to connect to.
43 * @port: the port to connect to (ignored for AF_UNIX).
44 * @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
46 * @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
48 * This will create a socket and use it to connect to a host:port, or if
49 * family == AF_UNIX, to the path found in host.
51 * If the host has more than one address, it will try them one by one until
52 * a successful connection is established. The resulting socket will be
53 * found in *sock on success, it will be given INVALID_SOCKET otherwise.
55 * Returns 1 on success, 0 on failure.
57 int init_client(int *sock, const char *host, const char *port,
60 BIO_ADDRINFO *res = NULL;
61 const BIO_ADDRINFO *ai = NULL;
67 ret = BIO_lookup(host, port, BIO_LOOKUP_CLIENT, family, type, &res);
69 ERR_print_errors(bio_err);
74 for (ai = res; ai != NULL; ai = BIO_ADDRINFO_next(ai)) {
75 /* Admittedly, these checks are quite paranoid, we should not get
76 * anything in the BIO_ADDRINFO chain that we haven't
78 OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res))
79 && (type == 0 || type == BIO_ADDRINFO_socktype(res)));
81 *sock = BIO_socket(BIO_ADDRINFO_family(ai), BIO_ADDRINFO_socktype(ai),
82 BIO_ADDRINFO_protocol(res), 0);
83 if (*sock == INVALID_SOCKET) {
84 /* Maybe the kernel doesn't support the socket family, even if
85 * BIO_lookup() added it in the returned result...
89 if (!BIO_connect(*sock, BIO_ADDRINFO_address(ai), 0)) {
90 BIO_closesocket(*sock);
91 *sock = INVALID_SOCKET;
95 /* Success, don't try any more addresses */
99 if (*sock == INVALID_SOCKET) {
100 ERR_print_errors(bio_err);
102 /* Remove any stale errors from previous connection attempts */
106 BIO_ADDRINFO_free(res);
111 * do_server - helper routine to perform a server operation
112 * @accept_sock: pointer to storage of resulting socket.
113 * @host: the host name or path (for AF_UNIX) to connect to.
114 * @port: the port to connect to (ignored for AF_UNIX).
115 * @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
117 * @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
118 * @cb: pointer to a function that receives the accepted socket and
119 * should perform the communication with the connecting client.
120 * @context: pointer to memory that's passed verbatim to the cb function.
121 * @naccept: number of times an incoming connect should be accepted. If -1,
124 * This will create a socket and use it to listen to a host:port, or if
125 * family == AF_UNIX, to the path found in host, then start accepting
126 * incoming connections and run cb on the resulting socket.
128 * 0 on failure, something other on success.
130 int do_server(int *accept_sock, const char *host, const char *port,
131 int family, int type, do_server_cb cb,
132 unsigned char *context, int naccept)
137 BIO_ADDRINFO *res = NULL;
140 if (!BIO_sock_init())
143 if (!BIO_lookup(host, port, BIO_LOOKUP_SERVER, family, type, &res)) {
144 ERR_print_errors(bio_err);
148 /* Admittedly, these checks are quite paranoid, we should not get
149 * anything in the BIO_ADDRINFO chain that we haven't asked for */
150 OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res))
151 && (type == 0 || type == BIO_ADDRINFO_socktype(res)));
153 asock = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
154 BIO_ADDRINFO_protocol(res), 0);
155 if (asock == INVALID_SOCKET
156 || !BIO_listen(asock, BIO_ADDRINFO_address(res), BIO_SOCK_REUSEADDR)) {
157 BIO_ADDRINFO_free(res);
158 ERR_print_errors(bio_err);
159 if (asock != INVALID_SOCKET)
160 BIO_closesocket(asock);
164 BIO_ADDRINFO_free(res);
167 if (accept_sock != NULL)
168 *accept_sock = asock;
170 if (type == SOCK_STREAM) {
172 sock = BIO_accept_ex(asock, NULL, 0);
173 } while (sock < 0 && BIO_sock_should_retry(ret));
175 ERR_print_errors(bio_err);
176 BIO_closesocket(asock);
179 i = (*cb)(sock, type, context);
180 BIO_closesocket(sock);
182 i = (*cb)(asock, type, context);
187 if (i < 0 || naccept == 0) {
188 BIO_closesocket(asock);
195 if (family == AF_UNIX)
201 #endif /* OPENSSL_NO_SOCK */