source3/libsmb/clidgram.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    client dgram calls
   5    Copyright (C) Andrew Tridgell 1994-1998
   6    Copyright (C) Richard Sharpe 2001
   7    Copyright (C) John Terpstra 2001
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #define NO_SYSLOG
  25
  26 #include "includes.h"
  27
  28 /*
  29  * cli_send_mailslot, send a mailslot for client code ...
  30  */
  31
  32 static int dgram_sock = -1;
  33
  34 int cli_send_mailslot(BOOL unique, char *mailslot, char *buf, int len,
  35                       const char *srcname, int src_type,
  36                       const char *dstname, int dest_type,
  37                       struct in_addr dest_ip, struct in_addr src_ip,
  38                       int dest_port)
  39 {
  40   struct packet_struct p;
  41   struct dgram_packet *dgram = &p.packet.dgram;
  42   struct sockaddr_in sock_out;
  43   char *ptr, *p2;
  44   char tmp[4];
  45
  46   bzero((char *)&p, sizeof(p));
  47
  48   /*
  49    * First, check if we have an open socket to the dest IP
  50    */
  51
  52   if (dgram_sock < 1) {
  53
  54     int name_size;
  55
  56     if ((dgram_sock = open_socket_out(SOCK_DGRAM, &dest_ip, 138, LONG_CONNECT_TIMEOUT)) < 0) {
  57
  58       DEBUG(4, ("open_sock_out failed ..."));
  59       return False;
  60
  61     }
  62
  63     /* Make it a broadcast socket ... */
  64
  65     set_socket_options(dgram_sock, "SO_BROADCAST");
  66
  67     /* Now, bind my addr to it ... */
  68
  69     bzero((char *)&sock_out, sizeof(sock_out));
  70     putip((char *)&sock_out.sin_addr, (char *)&src_ip);
  71     sock_out.sin_port = INADDR_ANY;
  72     sock_out.sin_family = AF_INET;
  73
  74     bind(dgram_sock, (struct sockaddr_in *)&sock_out, sizeof(sock_out));
  75
  76     /* Now, figure out what socket name we were bound to. We want the port */
  77
  78     name_size = sizeof(sock_out);
  79
  80     getsockname(dgram_sock, (struct sockaddr_in *)&sock_out, &name_size);
  81
  82     fprintf(stderr, "Socket bound to IP:%s, port: %d\n", inet_ntoa(sock_out.sin_addr), ntohs(sock_out.sin_port));
  83
  84   }
  85
  86   /*
  87    * Next, build the DGRAM ...
  88    */
  89
  90   /* DIRECT GROUP or UNIQUE datagram. */
  91   dgram->header.msg_type = unique ? 0x10 : 0x11;
  92   dgram->header.flags.node_type = M_NODE;
  93   dgram->header.flags.first = True;
  94   dgram->header.flags.more = False;
  95   dgram->header.dgm_id = ((unsigned)time(NULL)%(unsigned)0x7FFF) + ((unsigned)sys_getpid()%(unsigned)100);
  96   dgram->header.source_ip = src_ip;
  97   dgram->header.source_port = ntohs(sock_out.sin_port);
  98   dgram->header.dgm_length = 0; /* Let build_dgram() handle this. */
  99   dgram->header.packet_offset = 0;
 100
 101   make_nmb_name(&dgram->source_name,srcname,src_type);
 102   make_nmb_name(&dgram->dest_name,dstname,dest_type);
 103
 104   ptr = &dgram->data[0];
 105
 106   /* Setup the smb part. */
 107   ptr -= 4; /* XXX Ugliness because of handling of tcp SMB length. */
 108   memcpy(tmp,ptr,4);
 109   set_message(ptr,17,17 + len,True);
 110   memcpy(ptr,tmp,4);
 111
 112   CVAL(ptr,smb_com) = SMBtrans;
 113   SSVAL(ptr,smb_vwv1,len);
 114   SSVAL(ptr,smb_vwv11,len);
 115   SSVAL(ptr,smb_vwv12,70 + strlen(mailslot));
 116   SSVAL(ptr,smb_vwv13,3);
 117   SSVAL(ptr,smb_vwv14,1);
 118   SSVAL(ptr,smb_vwv15,1);
 119   SSVAL(ptr,smb_vwv16,2);
 120   p2 = smb_buf(ptr);
 121   pstrcpy(p2,mailslot);
 122   p2 = skip_string(p2,1);
 123
 124   memcpy(p2,buf,len);
 125   p2 += len;
 126
 127   dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */
 128
 129   p.ip = dest_ip;
 130   p.port = dest_port;
 131   p.fd = dgram_sock;
 132   p.timestamp = time(NULL);
 133   p.packet_type = DGRAM_PACKET;
 134
 135   DEBUG(4,("send_mailslot: Sending to mailslot %s from %s IP %s ", mailslot,
 136                     nmb_namestr(&dgram->source_name), inet_ntoa(src_ip)));
 137   DEBUG(4,("to %s IP %s\n", nmb_namestr(&dgram->dest_name), inet_ntoa(dest_ip)));
 138
 139   return send_packet(&p);
 140
 141 }
 142
 143 /*
 144  * cli_get_response: Get a response ...
 145  */
 146 int cli_get_response(BOOL unique, char *mailslot, char *buf, int bufsiz)
 147 {
 148   struct packet_struct *packet;
 149
 150   packet = read_packet(dgram_sock, DGRAM_PACKET);
 151
 152   if (packet) { /* We got one, pull what we want out of the SMB data ... */
 153
 154     struct dgram_packet *dgram = &packet->packet.dgram;
 155
 156     /*
 157      * We should probably parse the SMB, but for now, we will pull what
 158      * from fixed, known locations ...
 159      */
 160
 161     /* Copy the data to buffer, respecting sizes ... */
 162
 163     bcopy(&dgram->data[92], buf, MIN(bufsiz, (dgram->datasize - 92)));
 164
 165   }
 166   else
 167     return -1;
 168
 169 }
 170
 171 /*
 172  * cli_get_backup_list: Send a get backup list request ...
 173  */
 174
 175 static char cli_backup_list[1024];
 176
 177 int cli_get_backup_list(const char *myname, const char *send_to_name)
 178 {
 179   char outbuf[15];
 180   char *p;
 181   struct in_addr sendto_ip, my_ip;
 182
 183   if (!resolve_name(send_to_name, &sendto_ip, 0x1d)) {
 184
 185     fprintf(stderr, "Could not resolve name: %s<1D>\n", send_to_name);
 186
 187   }
 188
 189   inet_aton("0.0.0.0", &my_ip);
 190
 191   if (!resolve_name(myname, &my_ip, 0x00)) { /* FIXME: Call others here */
 192
 193     fprintf(stderr, "Could not resolve name: %s<00>\n", myname);
 194
 195   }
 196
 197   bzero(cli_backup_list, sizeof(cli_backup_list));
 198   bzero(outbuf, sizeof(outbuf));
 199
 200   p = outbuf;
 201
 202   SCVAL(p, 0, ANN_GetBackupListReq);
 203   p++;
 204
 205   SCVAL(p, 0, 1); /* Count pointer ... */
 206   p++;
 207
 208   SIVAL(p, 0, 1); /* The sender's token ... */
 209   p += 4;
 210
 211   cli_send_mailslot(True, "\\MAILSLOT\\BROWSE", outbuf, PTR_DIFF(p, outbuf),
 212                     myname, 0, send_to_name, 0x1d, sendto_ip, my_ip, 138);
 213
 214   /* We should check the error and return if we got one */
 215
 216   /* Now, get the response ... */
 217
 218   cli_get_response(True, "\\MAILSLOT\\BROWSE", cli_backup_list, sizeof(cli_backup_list));
 219
 220   /* Should check the response here ... FIXME */
 221
 222 }
 223
 224 /*
 225  * cli_get_backup_server: Get the backup list and retrieve a server from it
 226  */
 227
 228 int cli_get_backup_server(char *my_name, char *target, char *servername, int namesize)
 229 {
 230
 231   /* Get the backup list first. We could pull this from the cache later */
 232
 233   cli_get_backup_list(my_name, target);  /* FIXME: Check the response */
 234
 235   strncpy(servername, cli_backup_list, MIN(16, namesize));
 236
 237 }