2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
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13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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32 #include <sys/types.h>
33 #include <sys/socket.h>
35 #include <netinet/in.h>
45 #define SA_LEN(_x) __libc_sa_len((_x)->sa_family)
46 extern int __libc_sa_len(sa_family_t __af) __THROW attribute_hidden;
48 /* int rexecoptions; - google does not know it */
49 static char ahostbuf[NI_MAXHOST];
52 rexec_af(char **ahost, int rport, const char *name, const char *pass, const char *cmd, int *fd2p, sa_family_t af)
54 struct sockaddr_storage sa2, from;
55 struct addrinfo hints, *res0;
56 const char *orig_name = name;
57 const char *orig_pass = pass;
62 char servbuff[NI_MAXSERV];
64 if (sizeof(servbuff) < sizeof(int)*3 + 2) {
65 snprintf(servbuff, sizeof(servbuff), "%d", ntohs(rport));
66 servbuff[sizeof(servbuff) - 1] = '\0';
68 sprintf(servbuff, "%d", ntohs(rport));
71 memset(&hints, '\0', sizeof(hints));
73 hints.ai_socktype = SOCK_STREAM;
74 hints.ai_flags = AI_CANONNAME;
75 gai = getaddrinfo(*ahost, servbuff, &hints, &res0);
81 if (res0->ai_canonname) {
82 strncpy(ahostbuf, res0->ai_canonname, sizeof(ahostbuf));
83 ahostbuf[sizeof(ahostbuf)-1] = '\0';
91 ruserpass(res0->ai_canonname, &name, &pass);
93 s = socket(res0->ai_family, res0->ai_socktype, 0);
95 perror("rexec: socket");
98 if (connect(s, res0->ai_addr, res0->ai_addrlen) < 0) {
99 if (errno == ECONNREFUSED && timo <= 16) {
105 perror(res0->ai_canonname);
109 (void) write(s, "", 1);
116 s2 = socket(res0->ai_family, res0->ai_socktype, 0);
122 sa2len = sizeof(sa2);
123 if (getsockname(s2, (struct sockaddr *)&sa2, &sa2len) < 0) {
124 perror("getsockname");
127 } else if (sa2len != SA_LEN((struct sockaddr *)&sa2)) {
133 if (!getnameinfo((struct sockaddr *)&sa2, sa2len,
134 NULL, 0, servbuff, sizeof(servbuff),
136 port = atoi(servbuff);
137 (void) sprintf(num, "%u", port);
138 (void) write(s, num, strlen(num)+1);
140 socklen_t len = sizeof(from);
141 s3 = TEMP_FAILURE_RETRY(accept(s2,
142 (struct sockaddr *)&from, &len));
152 (void) write(s, name, strlen(name) + 1);
153 /* should public key encypt the password here */
154 (void) write(s, pass, strlen(pass) + 1);
155 (void) write(s, cmd, strlen(cmd) + 1);
157 /* We don't need the memory allocated for the name and the password
158 in ruserpass anymore. */
159 if (name != orig_name)
161 if (pass != orig_pass)
164 if (read(s, &c, 1) != 1) {
169 while (read(s, &c, 1) == 1) {
170 (void) write(2, &c, 1);
185 libc_hidden_def(rexec_af)
188 rexec(char **ahost, int rport, const char *name, const char *pass,
189 const char *cmd, int *fd2p)
191 return rexec_af(ahost, rport, name, pass, cmd, fd2p, AF_INET);