1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * All rights reserved. 5 * 6 * This code is derived from software donated to Berkeley by 7 * Jan-Simon Pendry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Id: activate.c,v 1.2 1992/05/27 07:09:27 jsp Exp 38 * from: @(#)activate.c 8.2 (Berkeley) 3/27/94 39 * $Id: activate.c,v 1.3 1994/09/23 14:27:33 mycroft Exp $ 40 */ 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <unistd.h> 45 #include <string.h> 46 #include <errno.h> 47 #include <signal.h> 48 #include <sys/types.h> 49 #include <sys/param.h> 50 #include <sys/socket.h> 51 #include <sys/un.h> 52 #include <sys/syslog.h> 53 #include <sys/uio.h> 54 55 #include "portald.h" 56 57 /* 58 * Scan the providers list and call the 59 * appropriate function. 60 */ 61 static int activate_argv(pcr, key, v, so, fdp) 62 struct portal_cred *pcr; 63 char *key; 64 char **v; 65 int so; 66 int *fdp; 67 { 68 provider *pr; 69 70 for (pr = providers; pr->pr_match; pr++) 71 if (strcmp(v[0], pr->pr_match) == 0) 72 return ((*pr->pr_func)(pcr, key, v, so, fdp)); 73 74 return (ENOENT); 75 } 76 77 static int get_request(so, pcr, key, klen) 78 int so; 79 struct portal_cred *pcr; 80 char *key; 81 int klen; 82 { 83 struct iovec iov[2]; 84 struct msghdr msg; 85 int n; 86 87 iov[0].iov_base = (caddr_t) pcr; 88 iov[0].iov_len = sizeof(*pcr); 89 iov[1].iov_base = key; 90 iov[1].iov_len = klen; 91 92 memset(&msg, 0, sizeof(msg)); 93 msg.msg_iov = iov; 94 msg.msg_iovlen = 2; 95 96 n = recvmsg(so, &msg, 0); 97 if (n < 0) 98 return (errno); 99 100 if (n <= sizeof(*pcr)) 101 return (EINVAL); 102 103 n -= sizeof(*pcr); 104 key[n] = '\0'; 105 106 return (0); 107 } 108 109 static void send_reply(so, fd, error) 110 int so; 111 int fd; 112 int error; 113 { 114 int n; 115 struct iovec iov; 116 struct msghdr msg; 117 struct { 118 struct cmsghdr cmsg; 119 int fd; 120 } ctl; 121 122 /* 123 * Line up error code. Don't worry about byte ordering 124 * because we must be sending to the local machine. 125 */ 126 iov.iov_base = (caddr_t) &error; 127 iov.iov_len = sizeof(error); 128 129 /* 130 * Build a msghdr 131 */ 132 memset(&msg, 0, sizeof(msg)); 133 msg.msg_iov = &iov; 134 msg.msg_iovlen = 1; 135 136 /* 137 * If there is a file descriptor to send then 138 * construct a suitable rights control message. 139 */ 140 if (fd >= 0) { 141 ctl.fd = fd; 142 ctl.cmsg.cmsg_len = sizeof(ctl); 143 ctl.cmsg.cmsg_level = SOL_SOCKET; 144 ctl.cmsg.cmsg_type = SCM_RIGHTS; 145 msg.msg_control = (caddr_t) &ctl; 146 msg.msg_controllen = ctl.cmsg.cmsg_len; 147 } 148 149 /* 150 * Send to kernel... 151 */ 152 if ((n = sendmsg(so, &msg, MSG_EOR)) < 0) 153 syslog(LOG_ERR, "send: %s", strerror(errno)); 154 #ifdef DEBUG 155 fprintf(stderr, "sent %d bytes\n", n); 156 #endif 157 sleep(1); /*XXX*/ 158 #ifdef notdef 159 if (shutdown(so, 2) < 0) 160 syslog(LOG_ERR, "shutdown: %s", strerror(errno)); 161 #endif 162 /* 163 * Throw away the open file descriptor 164 */ 165 (void) close(fd); 166 } 167 168 void activate(q, so) 169 qelem *q; 170 int so; 171 { 172 struct portal_cred pcred; 173 char key[MAXPATHLEN+1]; 174 int error; 175 char **v; 176 int fd = -1; 177 178 /* 179 * Read the key from the socket 180 */ 181 error = get_request(so, &pcred, key, sizeof(key)); 182 if (error) { 183 syslog(LOG_ERR, "activate: recvmsg: %s", strerror(error)); 184 goto drop; 185 } 186 187 #ifdef DEBUG 188 fprintf(stderr, "lookup key %s\n", key); 189 #endif 190 191 /* 192 * Find a match in the configuration file 193 */ 194 v = conf_match(q, key); 195 196 /* 197 * If a match existed, then find an appropriate portal 198 * otherwise simply return ENOENT. 199 */ 200 if (v) { 201 error = activate_argv(&pcred, key, v, so, &fd); 202 if (error) 203 fd = -1; 204 else if (fd < 0) 205 error = -1; 206 } else { 207 error = ENOENT; 208 } 209 210 if (error >= 0) 211 send_reply(so, fd, error); 212 213 drop:; 214 close(so); 215 } 216