Annotation of src/usr.bin/openssl/s_socket.c, Revision 1.2
1.2 ! jsing 1: /* $OpenBSD: s_socket.c,v 1.1 2014/08/26 17:47:25 jsing 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;
86: int i, s;
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");
114: close(s);
115: return (0);
116: }
117: }
118: if ((i = connect(s, ai->ai_addr, ai->ai_addrlen)) == 0) {
119: *sock = s;
120: freeaddrinfo(ai_top);
121: return (1);
122: }
123: close(s);
124: }
125:
126: perror("connect");
127: close(s);
128: freeaddrinfo(ai_top);
129: return (0);
130: }
131:
132: int
133: do_server(int port, int type, int *ret,
134: int (*cb) (char *hostname, int s, unsigned char *context),
135: unsigned char *context)
136: {
137: int sock;
138: char *name = NULL;
139: int accept_socket = 0;
140: int i;
141:
142: if (!init_server(&accept_socket, port, type))
143: return (0);
144:
145: if (ret != NULL) {
146: *ret = accept_socket;
147: /* return(1); */
148: }
149: for (;;) {
150: if (type == SOCK_STREAM) {
151: if (do_accept(accept_socket, &sock, &name) == 0) {
152: shutdown(accept_socket, SHUT_RD);
153: close(accept_socket);
154: return (0);
155: }
156: } else
157: sock = accept_socket;
158: i = (*cb) (name, sock, context);
159: free(name);
160: if (type == SOCK_STREAM) {
161: shutdown(sock, SHUT_RDWR);
162: close(sock);
163: }
164: if (i < 0) {
165: shutdown(accept_socket, SHUT_RDWR);
166: close(accept_socket);
167: return (i);
168: }
169: }
170: }
171:
172: static int
173: init_server_long(int *sock, int port, char *ip, int type)
174: {
175: int ret = 0;
176: struct sockaddr_in server;
177: int s = -1;
178:
179: memset((char *) &server, 0, sizeof(server));
180: server.sin_family = AF_INET;
181: server.sin_port = htons((unsigned short) port);
182: if (ip == NULL)
183: server.sin_addr.s_addr = INADDR_ANY;
184: else
185: memcpy(&server.sin_addr.s_addr, ip, 4);
186:
187: if (type == SOCK_STREAM)
188: s = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL);
189: else /* type == SOCK_DGRAM */
190: s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
191:
192: if (s == -1)
193: goto err;
194: #if defined SOL_SOCKET && defined SO_REUSEADDR
195: {
196: int j = 1;
197: setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
198: (void *) &j, sizeof j);
199: }
200: #endif
201: if (bind(s, (struct sockaddr *) & server, sizeof(server)) == -1) {
202: perror("bind");
203: goto err;
204: }
205: /* Make it 128 for linux */
206: if (type == SOCK_STREAM && listen(s, 128) == -1)
207: goto err;
208: *sock = s;
209: ret = 1;
210: err:
211: if ((ret == 0) && (s != -1)) {
212: shutdown(s, SHUT_RD);
213: close(s);
214: }
215: return (ret);
216: }
217:
218: static int
219: init_server(int *sock, int port, int type)
220: {
221: return (init_server_long(sock, port, NULL, type));
222: }
223:
224: static int
225: do_accept(int acc_sock, int *sock, char **host)
226: {
227: int ret;
228: struct hostent *h1, *h2;
229: static struct sockaddr_in from;
230: socklen_t len;
231: /* struct linger ling; */
232:
233: redoit:
234:
235: memset((char *) &from, 0, sizeof(from));
236: len = sizeof(from);
237: ret = accept(acc_sock, (struct sockaddr *) & from, &len);
238: if (ret == -1) {
239: if (errno == EINTR) {
240: /* check_timeout(); */
241: goto redoit;
242: }
243: fprintf(stderr, "errno=%d ", errno);
244: perror("accept");
245: return (0);
246: }
247: /*
248: ling.l_onoff=1;
249: ling.l_linger=0;
250: i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
251: if (i < 0) { perror("linger"); return(0); }
252: i=0;
253: i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
254: if (i < 0) { perror("keepalive"); return(0); }
255: */
256:
257: if (host == NULL)
258: goto end;
259: h1 = gethostbyaddr((char *) &from.sin_addr.s_addr,
260: sizeof(from.sin_addr.s_addr), AF_INET);
261: if (h1 == NULL) {
262: BIO_printf(bio_err, "bad gethostbyaddr\n");
263: *host = NULL;
264: /* return(0); */
265: } else {
266: if ((*host = strdup(h1->h_name)) == NULL) {
267: perror("strdup");
268: close(ret);
269: return (0);
270: }
271:
272: h2 = gethostbyname(*host);
273: if (h2 == NULL) {
274: BIO_printf(bio_err, "gethostbyname failure\n");
275: close(ret);
276: return (0);
277: }
278: if (h2->h_addrtype != AF_INET) {
279: BIO_printf(bio_err, "gethostbyname addr is not AF_INET\n");
280: close(ret);
281: return (0);
282: }
283: }
284:
285: end:
286: *sock = ret;
287: return (1);
288: }
289:
290: int
291: extract_host_port(char *str, char **host_ptr, unsigned char *ip,
292: char **port_ptr)
293: {
294: char *h, *p;
295:
296: h = str;
297: p = strrchr(str, '/'); /* IPv6 host/port */
298: if (p == NULL) {
299: p = strrchr(str, ':');
300: }
301: if (p == NULL) {
302: BIO_printf(bio_err, "no port defined\n");
303: return (0);
304: }
305: *(p++) = '\0';
306:
307: if (host_ptr != NULL)
308: *host_ptr = h;
309:
310: if (port_ptr != NULL && p != NULL && *p != '\0')
311: *port_ptr = p;
312:
313: return (1);
314: }
315:
316: int
317: extract_port(char *str, short *port_ptr)
318: {
319: int i;
320: const char *errstr;
321: struct servent *s;
322:
323: i = strtonum(str, 1, 65535, &errstr);
324: if (!errstr) {
325: *port_ptr = (unsigned short) i;
326: } else {
327: s = getservbyname(str, "tcp");
328: if (s == NULL) {
329: BIO_printf(bio_err, "getservbyname failure for %s\n", str);
330: return (0);
331: }
332: *port_ptr = ntohs((unsigned short) s->s_port);
333: }
334: return (1);
335: }
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