source3/libsmb/clidgram.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client dgram calls
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Richard Sharpe 2001
   6    Copyright (C) John Terpstra 2001
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23
  24 /*
  25  * cli_send_mailslot, send a mailslot for client code ...
  26  */
  27
  28 bool cli_send_mailslot(struct messaging_context *msg_ctx,
  29                        bool unique, const char *mailslot,
  30                        uint16 priority,
  31                        char *buf, int len,
  32                        const char *srcname, int src_type,
  33                        const char *dstname, int dest_type,
  34                        const struct sockaddr_storage *dest_ss)
  35 {
  36         struct packet_struct p;
  37         struct dgram_packet *dgram = &p.packet.dgram;
  38         char *ptr, *p2;
  39         char tmp[4];
  40         pid_t nmbd_pid;
  41         char addr[INET6_ADDRSTRLEN];
  42
  43         if ((nmbd_pid = pidfile_pid("nmbd")) == 0) {
  44                 DEBUG(3, ("No nmbd found\n"));
  45                 return False;
  46         }
  47
  48         if (dest_ss->ss_family != AF_INET) {
  49                 DEBUG(3, ("cli_send_mailslot: can't send to IPv6 address.\n"));
  50                 return false;
  51         }
  52
  53         memset((char *)&p, '\0', sizeof(p));
  54
  55         /*
  56          * Next, build the DGRAM ...
  57          */
  58
  59         /* DIRECT GROUP or UNIQUE datagram. */
  60         dgram->header.msg_type = unique ? 0x10 : 0x11;
  61         dgram->header.flags.node_type = M_NODE;
  62         dgram->header.flags.first = True;
  63         dgram->header.flags.more = False;
  64         dgram->header.dgm_id = ((unsigned)time(NULL)%(unsigned)0x7FFF) +
  65                 ((unsigned)sys_getpid()%(unsigned)100);
  66         /* source ip is filled by nmbd */
  67         dgram->header.dgm_length = 0; /* Let build_dgram() handle this. */
  68         dgram->header.packet_offset = 0;
  69
  70         make_nmb_name(&dgram->source_name,srcname,src_type);
  71         make_nmb_name(&dgram->dest_name,dstname,dest_type);
  72
  73         ptr = &dgram->data[0];
  74
  75         /* Setup the smb part. */
  76         ptr -= 4; /* XXX Ugliness because of handling of tcp SMB length. */
  77         memcpy(tmp,ptr,4);
  78
  79         if (smb_size + 17*2 + strlen(mailslot) + 1 + len > MAX_DGRAM_SIZE) {
  80                 DEBUG(0, ("cli_send_mailslot: Cannot write beyond end of packet\n"));
  81                 return False;
  82         }
  83
  84         cli_set_message(ptr,17,strlen(mailslot) + 1 + len,True);
  85         memcpy(ptr,tmp,4);
  86
  87         SCVAL(ptr,smb_com,SMBtrans);
  88         SSVAL(ptr,smb_vwv1,len);
  89         SSVAL(ptr,smb_vwv11,len);
  90         SSVAL(ptr,smb_vwv12,70 + strlen(mailslot));
  91         SSVAL(ptr,smb_vwv13,3);
  92         SSVAL(ptr,smb_vwv14,1);
  93         SSVAL(ptr,smb_vwv15,priority);
  94         SSVAL(ptr,smb_vwv16,2);
  95         p2 = smb_buf(ptr);
  96         fstrcpy(p2,mailslot);
  97         p2 = skip_string(ptr,MAX_DGRAM_SIZE,p2);
  98         if (!p2) {
  99                 return False;
 100         }
 101
 102         memcpy(p2,buf,len);
 103         p2 += len;
 104
 105         dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */
 106
 107         p.packet_type = DGRAM_PACKET;
 108         p.ip = ((const struct sockaddr_in *)dest_ss)->sin_addr;
 109         p.timestamp = time(NULL);
 110
 111         DEBUG(4,("send_mailslot: Sending to mailslot %s from %s ",
 112                  mailslot, nmb_namestr(&dgram->source_name)));
 113         print_sockaddr(addr, sizeof(addr), dest_ss);
 114
 115         DEBUGADD(4,("to %s IP %s\n", nmb_namestr(&dgram->dest_name), addr));
 116
 117         return NT_STATUS_IS_OK(messaging_send_buf(msg_ctx,
 118                                                   pid_to_procid(nmbd_pid),
 119                                                   MSG_SEND_PACKET,
 120                                                   (uint8 *)&p, sizeof(p)));
 121 }