Annotation of src/usr.bin/openssl/s_socket.c, Revision 1.7
1.7 ! doug 1: /* $OpenBSD: s_socket.c,v 1.6 2015/07/19 03:28:26 doug Exp $ */
1.1 jsing 2: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3: * All rights reserved.
4: *
5: * This package is an SSL implementation written
6: * by Eric Young (eay@cryptsoft.com).
7: * The implementation was written so as to conform with Netscapes SSL.
8: *
9: * This library is free for commercial and non-commercial use as long as
10: * the following conditions are aheared to. The following conditions
11: * apply to all code found in this distribution, be it the RC4, RSA,
12: * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13: * included with this distribution is covered by the same copyright terms
14: * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15: *
16: * Copyright remains Eric Young's, and as such any Copyright notices in
17: * the code are not to be removed.
18: * If this package is used in a product, Eric Young should be given attribution
19: * as the author of the parts of the library used.
20: * This can be in the form of a textual message at program startup or
21: * in documentation (online or textual) provided with the package.
22: *
23: * Redistribution and use in source and binary forms, with or without
24: * modification, are permitted provided that the following conditions
25: * are met:
26: * 1. Redistributions of source code must retain the copyright
27: * notice, this list of conditions and the following disclaimer.
28: * 2. Redistributions in binary form must reproduce the above copyright
29: * notice, this list of conditions and the following disclaimer in the
30: * documentation and/or other materials provided with the distribution.
31: * 3. All advertising materials mentioning features or use of this software
32: * must display the following acknowledgement:
33: * "This product includes cryptographic software written by
34: * Eric Young (eay@cryptsoft.com)"
35: * The word 'cryptographic' can be left out if the rouines from the library
36: * being used are not cryptographic related :-).
37: * 4. If you include any Windows specific code (or a derivative thereof) from
38: * the apps directory (application code) you must include an acknowledgement:
39: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40: *
41: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51: * SUCH DAMAGE.
52: *
53: * The licence and distribution terms for any publically available version or
54: * derivative of this code cannot be changed. i.e. this code cannot simply be
55: * copied and put under another distribution licence
56: * [including the GNU Public Licence.]
57: */
58:
59: #include <sys/socket.h>
60:
61: #include <netinet/in.h>
62:
63: #include <errno.h>
64: #include <netdb.h>
65: #include <stdio.h>
66: #include <stdlib.h>
67: #include <string.h>
68: #include <unistd.h>
69:
70: #include "apps.h"
71:
72: #include <openssl/ssl.h>
73:
74: #include "s_apps.h"
75:
76: static int init_server(int *sock, int port, int type);
77: static int init_server_long(int *sock, int port, char *ip, int type);
78: static int do_accept(int acc_sock, int *sock, char **host);
79:
80: #define SOCKET_PROTOCOL IPPROTO_TCP
81:
82: int
83: init_client(int *sock, char *host, char *port, int type, int af)
84: {
85: struct addrinfo hints, *ai_top, *ai;
1.6 doug 86: int i, s = -1;
1.1 jsing 87:
88: memset(&hints, '\0', sizeof(hints));
89: hints.ai_family = af;
90: hints.ai_socktype = type;
91:
92: if ((i = getaddrinfo(host, port, &hints, &ai_top)) != 0) {
93: BIO_printf(bio_err, "getaddrinfo: %s\n", gai_strerror(i));
94: return (0);
95: }
96: if (ai_top == NULL || ai_top->ai_addr == NULL) {
97: BIO_printf(bio_err, "getaddrinfo returned no addresses\n");
98: if (ai_top != NULL) {
99: freeaddrinfo(ai_top);
100: }
101: return (0);
102: }
103: for (ai = ai_top; ai != NULL; ai = ai->ai_next) {
104: s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
105: if (s == -1) {
106: continue;
107: }
108: if (type == SOCK_STREAM) {
109: i = 0;
110: i = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
111: (char *) &i, sizeof(i));
112: if (i < 0) {
113: perror("keepalive");
1.5 beck 114: goto out;
1.1 jsing 115: }
116: }
117: if ((i = connect(s, ai->ai_addr, ai->ai_addrlen)) == 0) {
118: *sock = s;
119: freeaddrinfo(ai_top);
120: return (1);
121: }
122: close(s);
1.6 doug 123: s = -1;
1.1 jsing 124: }
125:
126: perror("connect");
1.5 beck 127: out:
1.6 doug 128: if (s != -1)
129: close(s);
1.1 jsing 130: freeaddrinfo(ai_top);
131: return (0);
132: }
133:
134: int
135: do_server(int port, int type, int *ret,
136: int (*cb) (char *hostname, int s, unsigned char *context),
137: unsigned char *context)
138: {
139: int sock;
140: char *name = NULL;
141: int accept_socket = 0;
142: int i;
143:
144: if (!init_server(&accept_socket, port, type))
145: return (0);
146:
147: if (ret != NULL) {
148: *ret = accept_socket;
149: /* return(1); */
150: }
151: for (;;) {
152: if (type == SOCK_STREAM) {
153: if (do_accept(accept_socket, &sock, &name) == 0) {
154: shutdown(accept_socket, SHUT_RD);
155: close(accept_socket);
156: return (0);
157: }
158: } else
159: sock = accept_socket;
160: i = (*cb) (name, sock, context);
161: free(name);
162: if (type == SOCK_STREAM) {
163: shutdown(sock, SHUT_RDWR);
164: close(sock);
165: }
166: if (i < 0) {
167: shutdown(accept_socket, SHUT_RDWR);
168: close(accept_socket);
169: return (i);
170: }
171: }
172: }
173:
174: static int
175: init_server_long(int *sock, int port, char *ip, int type)
176: {
177: int ret = 0;
178: struct sockaddr_in server;
179: int s = -1;
180:
181: memset((char *) &server, 0, sizeof(server));
182: server.sin_family = AF_INET;
183: server.sin_port = htons((unsigned short) port);
184: if (ip == NULL)
185: server.sin_addr.s_addr = INADDR_ANY;
186: else
187: memcpy(&server.sin_addr.s_addr, ip, 4);
188:
189: if (type == SOCK_STREAM)
190: s = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL);
191: else /* type == SOCK_DGRAM */
192: s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
193:
194: if (s == -1)
195: goto err;
196: #if defined SOL_SOCKET && defined SO_REUSEADDR
197: {
198: int j = 1;
1.7 ! doug 199: if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
! 200: (void *) &j, sizeof j) == -1) {
! 201: perror("setsockopt");
! 202: goto err;
! 203: }
1.1 jsing 204: }
205: #endif
206: if (bind(s, (struct sockaddr *) & server, sizeof(server)) == -1) {
207: perror("bind");
208: goto err;
209: }
210: /* Make it 128 for linux */
211: if (type == SOCK_STREAM && listen(s, 128) == -1)
212: goto err;
213: *sock = s;
214: ret = 1;
215: err:
216: if ((ret == 0) && (s != -1)) {
217: shutdown(s, SHUT_RD);
218: close(s);
219: }
220: return (ret);
221: }
222:
223: static int
224: init_server(int *sock, int port, int type)
225: {
226: return (init_server_long(sock, port, NULL, type));
227: }
228:
229: static int
230: do_accept(int acc_sock, int *sock, char **host)
231: {
232: int ret;
233: struct hostent *h1, *h2;
234: static struct sockaddr_in from;
235: socklen_t len;
236: /* struct linger ling; */
237:
238: redoit:
239:
240: memset((char *) &from, 0, sizeof(from));
241: len = sizeof(from);
242: ret = accept(acc_sock, (struct sockaddr *) & from, &len);
243: if (ret == -1) {
244: if (errno == EINTR) {
245: /* check_timeout(); */
246: goto redoit;
247: }
248: fprintf(stderr, "errno=%d ", errno);
249: perror("accept");
250: return (0);
251: }
252: /*
253: ling.l_onoff=1;
254: ling.l_linger=0;
255: i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
256: if (i < 0) { perror("linger"); return(0); }
257: i=0;
258: i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
259: if (i < 0) { perror("keepalive"); return(0); }
260: */
261:
262: if (host == NULL)
263: goto end;
264: h1 = gethostbyaddr((char *) &from.sin_addr.s_addr,
265: sizeof(from.sin_addr.s_addr), AF_INET);
266: if (h1 == NULL) {
267: BIO_printf(bio_err, "bad gethostbyaddr\n");
268: *host = NULL;
269: /* return(0); */
270: } else {
271: if ((*host = strdup(h1->h_name)) == NULL) {
272: perror("strdup");
273: close(ret);
274: return (0);
275: }
276:
277: h2 = gethostbyname(*host);
278: if (h2 == NULL) {
279: BIO_printf(bio_err, "gethostbyname failure\n");
280: close(ret);
281: return (0);
282: }
283: if (h2->h_addrtype != AF_INET) {
284: BIO_printf(bio_err, "gethostbyname addr is not AF_INET\n");
285: close(ret);
286: return (0);
287: }
288: }
289:
290: end:
291: *sock = ret;
292: return (1);
293: }
294:
295: int
296: extract_host_port(char *str, char **host_ptr, unsigned char *ip,
297: char **port_ptr)
298: {
299: char *h, *p;
300:
301: h = str;
302: p = strrchr(str, '/'); /* IPv6 host/port */
303: if (p == NULL) {
304: p = strrchr(str, ':');
305: }
306: if (p == NULL) {
307: BIO_printf(bio_err, "no port defined\n");
308: return (0);
309: }
310: *(p++) = '\0';
311:
312: if (host_ptr != NULL)
313: *host_ptr = h;
314:
315: if (port_ptr != NULL && p != NULL && *p != '\0')
316: *port_ptr = p;
317:
318: return (1);
319: }
320:
321: int
322: extract_port(char *str, short *port_ptr)
323: {
324: int i;
325: const char *errstr;
326: struct servent *s;
327:
328: i = strtonum(str, 1, 65535, &errstr);
329: if (!errstr) {
330: *port_ptr = (unsigned short) i;
331: } else {
332: s = getservbyname(str, "tcp");
333: if (s == NULL) {
334: BIO_printf(bio_err, "getservbyname failure for %s\n", str);
335: return (0);
336: }
337: *port_ptr = ntohs((unsigned short) s->s_port);
338: }
339: return (1);
340: }