/* Unix SMB/CIFS implementation. client dgram calls Copyright (C) Andrew Tridgell 1994-1998 Copyright (C) Richard Sharpe 2001 Copyright (C) John Terpstra 2001 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "includes.h" /* * cli_send_mailslot, send a mailslot for client code ... */ int cli_send_mailslot(int dgram_sock, BOOL unique, const char *mailslot, char *buf, int len, const char *srcname, int src_type, const char *dstname, int dest_type, struct in_addr dest_ip, struct in_addr src_ip, int dest_port, int src_port) { struct packet_struct p; struct dgram_packet *dgram = &p.packet.dgram; char *ptr, *p2; char tmp[4]; memset((char *)&p, '\0', sizeof(p)); /* * Next, build the DGRAM ... */ /* DIRECT GROUP or UNIQUE datagram. */ dgram->header.msg_type = unique ? 0x10 : 0x11; dgram->header.flags.node_type = M_NODE; dgram->header.flags.first = True; dgram->header.flags.more = False; dgram->header.dgm_id = ((unsigned)time(NULL)%(unsigned)0x7FFF) + ((unsigned)sys_getpid()%(unsigned)100); dgram->header.source_ip.s_addr = src_ip.s_addr; dgram->header.source_port = ntohs(src_port); dgram->header.dgm_length = 0; /* Let build_dgram() handle this. */ dgram->header.packet_offset = 0; make_nmb_name(&dgram->source_name,srcname,src_type); make_nmb_name(&dgram->dest_name,dstname,dest_type); ptr = &dgram->data[0]; /* Setup the smb part. */ ptr -= 4; /* XXX Ugliness because of handling of tcp SMB length. */ memcpy(tmp,ptr,4); set_message(ptr,17,17 + len,True); memcpy(ptr,tmp,4); SCVAL(ptr,smb_com,SMBtrans); SSVAL(ptr,smb_vwv1,len); SSVAL(ptr,smb_vwv11,len); SSVAL(ptr,smb_vwv12,70 + strlen(mailslot)); SSVAL(ptr,smb_vwv13,3); SSVAL(ptr,smb_vwv14,1); SSVAL(ptr,smb_vwv15,1); SSVAL(ptr,smb_vwv16,2); p2 = smb_buf(ptr); fstrcpy(p2,mailslot); p2 = skip_string(p2,1); memcpy(p2,buf,len); p2 += len; dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */ p.ip = dest_ip; p.port = dest_port; p.fd = dgram_sock; p.timestamp = time(NULL); p.packet_type = DGRAM_PACKET; DEBUG(4,("send_mailslot: Sending to mailslot %s from %s IP %s ", mailslot, nmb_namestr(&dgram->source_name), inet_ntoa(src_ip))); DEBUG(4,("to %s IP %s\n", nmb_namestr(&dgram->dest_name), inet_ntoa(dest_ip))); return send_packet(&p); } /* * cli_get_response: Get a response ... */ int cli_get_response(int dgram_sock, BOOL unique, const char *mailslot, char *buf, int bufsiz) { struct packet_struct *packet; packet = receive_dgram_packet(dgram_sock, 5, mailslot); if (packet) { /* We got one, pull what we want out of the SMB data ... */ struct dgram_packet *dgram = &packet->packet.dgram; /* * We should probably parse the SMB, but for now, we will pull what * from fixed, known locations ... */ /* Copy the data to buffer, respecting sizes ... */ memcpy(buf, &dgram->data[92], MIN(bufsiz, (dgram->datasize - 92))); } else return -1; return 0; } /* * cli_get_backup_list: Send a get backup list request ... */ static char cli_backup_list[1024]; int cli_get_backup_list(const char *myname, const char *send_to_name) { pstring outbuf; char *p; struct in_addr sendto_ip, my_ip; int dgram_sock; struct sockaddr_in sock_out; socklen_t name_size; if (!resolve_name(send_to_name, &sendto_ip, 0x1d)) { DEBUG(0, ("Could not resolve name: %s<1D>\n", send_to_name)); return False; } my_ip.s_addr = inet_addr("0.0.0.0"); if (!resolve_name(myname, &my_ip, 0x00)) { /* FIXME: Call others here */ DEBUG(0, ("Could not resolve name: %s<00>\n", myname)); } if ((dgram_sock = open_socket_out(SOCK_DGRAM, &sendto_ip, 138, LONG_CONNECT_TIMEOUT)) < 0) { DEBUG(4, ("open_sock_out failed ...")); return False; } /* Make it a broadcast socket ... */ set_socket_options(dgram_sock, "SO_BROADCAST"); /* Make it non-blocking??? */ if (fcntl(dgram_sock, F_SETFL, O_NONBLOCK) < 0) { DEBUG(0, ("Unable to set non blocking on dgram sock\n")); } /* Now, bind a local addr to it ... Try port 138 first ... */ memset((char *)&sock_out, '\0', sizeof(sock_out)); sock_out.sin_addr.s_addr = INADDR_ANY; sock_out.sin_port = htons(138); sock_out.sin_family = AF_INET; if (bind(dgram_sock, (struct sockaddr *)&sock_out, sizeof(sock_out)) < 0) { /* Try again on any port ... */ sock_out.sin_port = INADDR_ANY; if (bind(dgram_sock, (struct sockaddr *)&sock_out, sizeof(sock_out)) < 0) { DEBUG(4, ("failed to bind socket to address ...\n")); return False; } } /* Now, figure out what socket name we were bound to. We want the port */ name_size = sizeof(sock_out); getsockname(dgram_sock, (struct sockaddr *)&sock_out, &name_size); DEBUG(5, ("Socket bound to IP:%s, port: %d\n", inet_ntoa(sock_out.sin_addr), ntohs(sock_out.sin_port))); /* Now, build the request */ memset(cli_backup_list, '\0', sizeof(cli_backup_list)); memset(outbuf, '\0', sizeof(outbuf)); p = outbuf; SCVAL(p, 0, ANN_GetBackupListReq); p++; SCVAL(p, 0, 1); /* Count pointer ... */ p++; SIVAL(p, 0, 1); /* The sender's token ... */ p += 4; cli_send_mailslot(dgram_sock, True, "\\MAILSLOT\\BROWSE", outbuf, PTR_DIFF(p, outbuf), myname, 0, send_to_name, 0x1d, sendto_ip, my_ip, 138, sock_out.sin_port); /* We should check the error and return if we got one */ /* Now, get the response ... */ cli_get_response(dgram_sock, True, "\\MAILSLOT\\BROWSE", cli_backup_list, sizeof(cli_backup_list)); /* Should check the response here ... FIXME */ close(dgram_sock); return True; } /* * cli_get_backup_server: Get the backup list and retrieve a server from it */ int cli_get_backup_server(char *my_name, char *target, char *servername, int namesize) { /* Get the backup list first. We could pull this from the cache later */ cli_get_backup_list(my_name, target); /* FIXME: Check the response */ if (!cli_backup_list[0]) { /* Empty list ... try again */ cli_get_backup_list(my_name, target); } strncpy(servername, cli_backup_list, MIN(16, namesize)); return True; }