sbin/rconfig/client.c

   1 /*
   2  * RCONFIG/CLIENT.C
   3  *
   4  * Copyright (c) 2003,2004 The DragonFly Project.  All rights reserved.
   5  *
   6  * This code is derived from software contributed to The DragonFly Project
   7  * by Matthew Dillon <dillon@backplane.com>
   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  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  * 3. Neither the name of The DragonFly Project nor the names of its
  20  *    contributors may be used to endorse or promote products derived
  21  *    from this software without specific, prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  26  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  27  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  28  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  29  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  30  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  31  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  32  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  33  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #include "defs.h"
  38
  39 #define LONG_ALIGN(n)   roundup2(n, sizeof(long))
  40
  41 static void load_client_broadcast_tags(tag_t tag, const char *tagName);
  42
  43 void
  44 doClient(void)
  45 {
  46     int done = 0;
  47     tag_t tag;
  48
  49     /*
  50      * The server list is in the form host[:tag]
  51      */
  52     chdir(WorkDir);
  53     for (tag = AddrBase; tag && !done; tag = tag->next) {
  54         struct sockaddr_in sain;
  55         struct sockaddr_in rsin;
  56         char *tagName;
  57         char *host = NULL;
  58         char *res = NULL;
  59         char *buf = NULL;
  60         int len;
  61         int ufd = -1;
  62         FILE *fi = NULL;
  63         FILE *fo = NULL;
  64         int rc;
  65
  66         bzero(&sain, sizeof(sain));
  67         if (tag->name == NULL) {
  68             load_client_broadcast_tags(tag, "auto");
  69             continue;
  70         }
  71         if (tag->name[0] == ':') {
  72             load_client_broadcast_tags(tag, tag->name + 1);
  73             continue;
  74         }
  75         host = strdup(tag->name);
  76         if ((tagName = strchr(host, ':')) != NULL) {
  77             *tagName++ = 0;
  78             tagName = strdup(tagName);
  79         } else {
  80             tagName = strdup("auto");
  81         }
  82         if (inet_aton(host, &sain.sin_addr) == 0) {
  83             struct hostent *hp;
  84             if ((hp = gethostbyname2(host, AF_INET)) == NULL) {
  85                 fprintf(stderr, "Unable to resolve %s\n", host);
  86                 exit(1);
  87             }
  88             bcopy(hp->h_addr_list[0], &sain.sin_addr, hp->h_length);
  89             free(host);
  90             host = strdup(hp->h_name);
  91             endhostent();
  92         }
  93         sain.sin_port = htons(257);
  94         sain.sin_len = sizeof(sain);
  95         sain.sin_family = AF_INET;
  96
  97         /*
  98          * Do a couple of UDP transactions to locate the tag on the server.
  99          */
 100         printf("%s:%s - ", host, tagName);
 101         fflush(stdout);
 102         rc = udp_transact(&sain, &rsin, &ufd, &res, &len, "TAG %s\r\n", tagName);
 103         if (rc != 101 || res == NULL) {
 104             printf("NO LUCK %s\n", (res ? res : ""));
 105         } else {
 106             printf("%s -", res);
 107             fflush(stdout);
 108             rc = tcp_transact(&rsin, &fi, &fo, &buf, &len, "TAG %s\r\n", tagName);
 109             if (rc == 201 && buf) {
 110                 int ffd;
 111                 char *path;
 112
 113                 asprintf(&path, "%s/%s.sh", WorkDir, tagName);
 114                 ffd = open(path, O_CREAT|O_TRUNC|O_RDWR, 0755);
 115                 if (ffd >= 0 && write(ffd, buf, len) == len) {
 116                     printf("running %s [%d] in", path, len);
 117                     close(ffd);
 118                     ffd = -1;
 119                     for (rc = 5; rc > 0; --rc) {
 120                         printf(" %d", rc);
 121                         fflush(stdout);
 122                         sleep(1);
 123                     }
 124                     printf(" 0\n");
 125                     fflush(stdout);
 126                     rc = system(path);
 127                     if (rc)
 128                         printf("rconfig script exit code %d\n", rc);
 129                     done = 1;
 130                 } else {
 131                     if (ffd >= 0) {
 132                         remove(path);
 133                         close(ffd);
 134                         ffd = -1;
 135                     }
 136                     printf(" unable to create %s [%d] - DOWNLOAD FAILED\n",
 137                             path, len);
 138                 }
 139             } else {
 140                 printf(" DOWNLOAD FAILED\n");
 141             }
 142         }
 143         if (ufd >= 0) {
 144             close(ufd);
 145             ufd = -1;
 146         }
 147         if (fi != NULL) {
 148             fclose(fi);
 149             fi = NULL;
 150         }
 151         if (fo != NULL) {
 152             fclose(fo);
 153             fo = NULL;
 154         }
 155         if (buf)
 156             free(buf);
 157         if (res)
 158             free(res);
 159         free(host);
 160         free(tagName);
 161     }
 162 }
 163
 164 static
 165 void
 166 load_client_broadcast_tags(tag_t tag, const char *tagName)
 167 {
 168     struct sockaddr_dl *sdl;
 169     struct if_msghdr *ifm;
 170     int mib[6];
 171     char *buf;
 172     size_t bytes;
 173     int i;
 174
 175     mib[0] = CTL_NET;
 176     mib[1] = PF_ROUTE;
 177     mib[2] = 0;
 178     mib[3] = AF_INET;
 179     mib[4] = NET_RT_IFLIST;
 180     mib[5] = 0;
 181
 182     if (sysctl(mib, 6, NULL, &bytes, NULL, 0) < 0) {
 183         printf("no interfaces!\n");
 184         exit(1);
 185     }
 186     buf = malloc(bytes);
 187     if (sysctl(mib, 6, buf, &bytes, NULL, 0) < 0) {
 188         printf("no interfaces!\n");
 189         exit(1);
 190     }
 191     ifm = (void *)buf;
 192     sdl = NULL;
 193     while ((char *)ifm < buf + bytes && ifm->ifm_msglen) {
 194         switch(ifm->ifm_type) {
 195         case RTM_IFINFO:
 196             if (ifm->ifm_flags & IFF_UP) {
 197                 sdl = (void *)(ifm + 1);
 198             } else {
 199                 sdl = NULL;
 200             }
 201             break;
 202         case RTM_NEWADDR:
 203             if (sdl) {
 204                 struct sockaddr_in *sain;
 205                 struct ifa_msghdr *ifam;
 206                 char *scan;
 207                 char *name;
 208                 tag_t ntag;
 209
 210                 ifam = (void *)ifm;
 211                 scan = (char *)(ifam + 1);
 212                 for (i = 0; i < RTAX_MAX; ++i) {
 213                     if ((1 << i) & ifam->ifam_addrs) {
 214                         sain = (void *)scan;
 215                         if (i == RTAX_BRD) {
 216                             asprintf(&name, "%s:%s",
 217                                     inet_ntoa(sain->sin_addr), tagName);
 218                             ntag = calloc(sizeof(struct tag), 1);
 219                             ntag->name = name;
 220                             ntag->flags = 0;
 221                             ntag->next = tag->next;
 222                             tag->next = ntag;
 223                             tag = ntag;
 224                             if (VerboseOpt)
 225                                 printf("add: %s (%s)\n", sdl->sdl_data, tag->name);
 226                         }
 227                         scan = scan + LONG_ALIGN(sain->sin_len);
 228                     }
 229                 }
 230             }
 231             break;
 232         }
 233         ifm = (void *)((char *)ifm + ifm->ifm_msglen);
 234     }
 235 }
 236