]>
git.ipfire.org Git - thirdparty/openssl.git/blob - apps/s_socket.c
2 * Copyright 1995-2017 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
47 * @protocol: socket protocol, e.g. IPPROTO_TCP or IPPROTO_UDP (or 0 for any)
49 * This will create a socket and use it to connect to a host:port, or if
50 * family == AF_UNIX, to the path found in host.
52 * If the host has more than one address, it will try them one by one until
53 * a successful connection is established. The resulting socket will be
54 * found in *sock on success, it will be given INVALID_SOCKET otherwise.
56 * Returns 1 on success, 0 on failure.
58 int init_client(int *sock
, const char *host
, const char *port
,
59 int family
, int type
, int protocol
)
61 BIO_ADDRINFO
*res
= NULL
;
62 const BIO_ADDRINFO
*ai
= NULL
;
65 if (BIO_sock_init() != 1)
68 ret
= BIO_lookup_ex(host
, port
, BIO_LOOKUP_CLIENT
, family
, type
, protocol
,
71 ERR_print_errors(bio_err
);
76 for (ai
= res
; ai
!= NULL
; ai
= BIO_ADDRINFO_next(ai
)) {
77 /* Admittedly, these checks are quite paranoid, we should not get
78 * anything in the BIO_ADDRINFO chain that we haven't
80 OPENSSL_assert((family
== AF_UNSPEC
81 || family
== BIO_ADDRINFO_family(ai
))
82 && (type
== 0 || type
== BIO_ADDRINFO_socktype(ai
))
84 || protocol
== BIO_ADDRINFO_protocol(ai
)));
86 *sock
= BIO_socket(BIO_ADDRINFO_family(ai
), BIO_ADDRINFO_socktype(ai
),
87 BIO_ADDRINFO_protocol(ai
), 0);
88 if (*sock
== INVALID_SOCKET
) {
89 /* Maybe the kernel doesn't support the socket family, even if
90 * BIO_lookup() added it in the returned result...
95 #ifndef OPENSSL_NO_SCTP
96 if (protocol
== IPPROTO_SCTP
) {
98 * For SCTP we have to set various options on the socket prior to
99 * connecting. This is done automatically by BIO_new_dgram_sctp().
100 * We don't actually need the created BIO though so we free it again
103 BIO
*tmpbio
= BIO_new_dgram_sctp(*sock
, BIO_NOCLOSE
);
105 if (tmpbio
== NULL
) {
106 ERR_print_errors(bio_err
);
113 if (!BIO_connect(*sock
, BIO_ADDRINFO_address(ai
), 0)) {
114 BIO_closesocket(*sock
);
115 *sock
= INVALID_SOCKET
;
119 /* Success, don't try any more addresses */
123 if (*sock
== INVALID_SOCKET
) {
124 ERR_print_errors(bio_err
);
126 /* Remove any stale errors from previous connection attempts */
130 BIO_ADDRINFO_free(res
);
135 * do_server - helper routine to perform a server operation
136 * @accept_sock: pointer to storage of resulting socket.
137 * @host: the host name or path (for AF_UNIX) to connect to.
138 * @port: the port to connect to (ignored for AF_UNIX).
139 * @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
141 * @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
142 * @cb: pointer to a function that receives the accepted socket and
143 * should perform the communication with the connecting client.
144 * @context: pointer to memory that's passed verbatim to the cb function.
145 * @naccept: number of times an incoming connect should be accepted. If -1,
148 * This will create a socket and use it to listen to a host:port, or if
149 * family == AF_UNIX, to the path found in host, then start accepting
150 * incoming connections and run cb on the resulting socket.
152 * 0 on failure, something other on success.
154 int do_server(int *accept_sock
, const char *host
, const char *port
,
155 int family
, int type
, int protocol
, do_server_cb cb
,
156 unsigned char *context
, int naccept
)
161 BIO_ADDRINFO
*res
= NULL
;
164 if (BIO_sock_init() != 1)
167 if (!BIO_lookup_ex(host
, port
, BIO_LOOKUP_SERVER
, family
, type
, protocol
,
169 ERR_print_errors(bio_err
);
173 /* Admittedly, these checks are quite paranoid, we should not get
174 * anything in the BIO_ADDRINFO chain that we haven't asked for */
175 OPENSSL_assert((family
== AF_UNSPEC
|| family
== BIO_ADDRINFO_family(res
))
176 && (type
== 0 || type
== BIO_ADDRINFO_socktype(res
))
177 && (protocol
== 0 || protocol
== BIO_ADDRINFO_protocol(res
)));
179 asock
= BIO_socket(BIO_ADDRINFO_family(res
), BIO_ADDRINFO_socktype(res
),
180 BIO_ADDRINFO_protocol(res
), 0);
181 if (asock
== INVALID_SOCKET
182 || !BIO_listen(asock
, BIO_ADDRINFO_address(res
), BIO_SOCK_REUSEADDR
)) {
183 BIO_ADDRINFO_free(res
);
184 ERR_print_errors(bio_err
);
185 if (asock
!= INVALID_SOCKET
)
186 BIO_closesocket(asock
);
190 #ifndef OPENSSL_NO_SCTP
191 if (protocol
== IPPROTO_SCTP
) {
193 * For SCTP we have to set various options on the socket prior to
194 * accepting. This is done automatically by BIO_new_dgram_sctp().
195 * We don't actually need the created BIO though so we free it again
198 BIO
*tmpbio
= BIO_new_dgram_sctp(asock
, BIO_NOCLOSE
);
200 if (tmpbio
== NULL
) {
201 BIO_closesocket(asock
);
202 ERR_print_errors(bio_err
);
209 BIO_ADDRINFO_free(res
);
212 if (accept_sock
!= NULL
)
213 *accept_sock
= asock
;
215 if (type
== SOCK_STREAM
) {
217 sock
= BIO_accept_ex(asock
, NULL
, 0);
218 } while (sock
< 0 && BIO_sock_should_retry(sock
));
220 ERR_print_errors(bio_err
);
221 BIO_closesocket(asock
);
224 i
= (*cb
)(sock
, type
, protocol
, context
);
225 BIO_closesocket(sock
);
227 i
= (*cb
)(asock
, type
, protocol
, context
);
232 if (i
< 0 || naccept
== 0) {
233 BIO_closesocket(asock
);
240 if (family
== AF_UNIX
)
246 #endif /* OPENSSL_NO_SOCK */