Annotation of src/usr.bin/openssl/s_socket.c, Revision 1.12
1.12 ! tb 1: /* $OpenBSD: s_socket.c,v 1.11 2019/06/28 13:35:02 deraadt 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: int
81: init_client(int *sock, char *host, char *port, int type, int af)
82: {
83: struct addrinfo hints, *ai_top, *ai;
1.6 doug 84: int i, s = -1;
1.1 jsing 85:
86: memset(&hints, '\0', sizeof(hints));
87: hints.ai_family = af;
88: hints.ai_socktype = type;
89:
90: if ((i = getaddrinfo(host, port, &hints, &ai_top)) != 0) {
91: BIO_printf(bio_err, "getaddrinfo: %s\n", gai_strerror(i));
92: return (0);
93: }
94: if (ai_top == NULL || ai_top->ai_addr == NULL) {
95: BIO_printf(bio_err, "getaddrinfo returned no addresses\n");
96: if (ai_top != NULL) {
97: freeaddrinfo(ai_top);
98: }
99: return (0);
100: }
101: for (ai = ai_top; ai != NULL; ai = ai->ai_next) {
102: s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
103: if (s == -1) {
104: continue;
105: }
106: if (type == SOCK_STREAM) {
107: i = 0;
108: i = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
109: (char *) &i, sizeof(i));
1.11 deraadt 110: if (i == -1) {
1.1 jsing 111: perror("keepalive");
1.5 beck 112: goto out;
1.1 jsing 113: }
114: }
115: if ((i = connect(s, ai->ai_addr, ai->ai_addrlen)) == 0) {
116: *sock = s;
117: freeaddrinfo(ai_top);
118: return (1);
119: }
120: close(s);
1.6 doug 121: s = -1;
1.1 jsing 122: }
123:
124: perror("connect");
1.9 jsing 125: out:
1.6 doug 126: if (s != -1)
127: close(s);
1.1 jsing 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),
1.12 ! tb 135: unsigned char *context, int naccept)
1.1 jsing 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: }
1.12 ! tb 164: if (naccept != -1)
! 165: naccept--;
! 166: if (i < 0 || naccept == 0) {
1.1 jsing 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)
1.8 lteo 190: s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1.1 jsing 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;
1.9 jsing 215: err:
1.1 jsing 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:
1.9 jsing 238: redoit:
1.1 jsing 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));
1.11 deraadt 256: if (i == -1) { perror("linger"); return(0); }
1.1 jsing 257: i=0;
258: i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
1.11 deraadt 259: if (i == -1) { perror("keepalive"); return(0); }
1.1 jsing 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);
1.10 tb 281: free(*host);
1.1 jsing 282: return (0);
283: }
284: if (h2->h_addrtype != AF_INET) {
285: BIO_printf(bio_err, "gethostbyname addr is not AF_INET\n");
286: close(ret);
1.10 tb 287: free(*host);
1.1 jsing 288: return (0);
289: }
290: }
291:
1.9 jsing 292: end:
1.1 jsing 293: *sock = ret;
294: return (1);
295: }
296:
297: int
298: extract_host_port(char *str, char **host_ptr, unsigned char *ip,
299: char **port_ptr)
300: {
301: char *h, *p;
302:
303: h = str;
304: p = strrchr(str, '/'); /* IPv6 host/port */
305: if (p == NULL) {
306: p = strrchr(str, ':');
307: }
308: if (p == NULL) {
309: BIO_printf(bio_err, "no port defined\n");
310: return (0);
311: }
312: *(p++) = '\0';
313:
314: if (host_ptr != NULL)
315: *host_ptr = h;
316:
317: if (port_ptr != NULL && p != NULL && *p != '\0')
318: *port_ptr = p;
319:
320: return (1);
321: }
322:
323: int
324: extract_port(char *str, short *port_ptr)
325: {
326: int i;
327: const char *errstr;
328: struct servent *s;
329:
330: i = strtonum(str, 1, 65535, &errstr);
331: if (!errstr) {
332: *port_ptr = (unsigned short) i;
333: } else {
334: s = getservbyname(str, "tcp");
335: if (s == NULL) {
336: BIO_printf(bio_err, "getservbyname failure for %s\n", str);
337: return (0);
338: }
339: *port_ptr = ntohs((unsigned short) s->s_port);
340: }
341: return (1);
342: }