/* Unix SMB/CIFS implementation. Winbind daemon - WINS related functions Copyright (C) Andrew Tridgell 1999 Copyright (C) Herb Lewis 2002 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 3 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, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "winbindd.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_WINBIND /* Use our own create socket code so we don't recurse.... */ static int wins_lookup_open_socket_in(void) { struct sockaddr_in sock; int val=1; int res; memset((char *)&sock,'\0',sizeof(sock)); #ifdef HAVE_SOCK_SIN_LEN sock.sin_len = sizeof(sock); #endif sock.sin_port = 0; sock.sin_family = AF_INET; sock.sin_addr.s_addr = interpret_addr("0.0.0.0"); res = socket(AF_INET, SOCK_DGRAM, 0); if (res == -1) return -1; if (setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))) { close(res); return -1; } #ifdef SO_REUSEPORT if (setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val))) { close(res); return -1; } #endif /* SO_REUSEPORT */ /* now we've got a socket - we need to bind it */ if (bind(res, (struct sockaddr *)(void *)&sock, sizeof(sock)) < 0) { close(res); return(-1); } set_socket_options(res,"SO_BROADCAST"); return res; } static NODE_STATUS_STRUCT *lookup_byaddr_backend(const char *addr, int *count) { int fd; struct sockaddr_storage ss; struct nmb_name nname; NODE_STATUS_STRUCT *status; fd = wins_lookup_open_socket_in(); if (fd == -1) return NULL; make_nmb_name(&nname, "*", 0); if (!interpret_string_addr(&ss, addr, AI_NUMERICHOST)) { return NULL; } status = node_status_query(fd, &nname, &ss, count, NULL); close(fd); return status; } static struct sockaddr_storage *lookup_byname_backend(const char *name, int *count) { int fd; struct ip_service *ret = NULL; struct sockaddr_storage *return_ss = NULL; int j, i, flags = 0; *count = 0; /* always try with wins first */ if (NT_STATUS_IS_OK(resolve_wins(name,0x20,&ret,count))) { if ( *count == 0 ) return NULL; if ( (return_ss = SMB_MALLOC_ARRAY(struct sockaddr_storage, *count)) == NULL ) { free( ret ); return NULL; } /* copy the IP addresses */ for ( i=0; i<(*count); i++ ) return_ss[i] = ret[i].ss; free( ret ); return return_ss; } fd = wins_lookup_open_socket_in(); if (fd == -1) { return NULL; } /* uggh, we have to broadcast to each interface in turn */ for (j=iface_count() - 1; j >= 0; j--) { const struct sockaddr_storage *bcast_ss = iface_n_bcast(j); if (!bcast_ss) { continue; } return_ss = name_query(fd,name,0x20,True,True,bcast_ss,count, &flags, NULL); if (return_ss) { break; } } close(fd); return return_ss; } /* Get hostname from IP */ void winbindd_wins_byip(struct winbindd_cli_state *state) { fstring response; int i, count, maxlen, size; NODE_STATUS_STRUCT *status; /* Ensure null termination */ state->request->data.winsreq[sizeof(state->request->data.winsreq)-1]='\0'; DEBUG(3, ("[%5lu]: wins_byip %s\n", (unsigned long)state->pid, state->request->data.winsreq)); *response = '\0'; maxlen = sizeof(response) - 1; if ((status = lookup_byaddr_backend(state->request->data.winsreq, &count))){ size = strlen(state->request->data.winsreq); if (size > maxlen) { SAFE_FREE(status); request_error(state); return; } fstrcat(response,state->request->data.winsreq); fstrcat(response,"\t"); for (i = 0; i < count; i++) { /* ignore group names */ if (status[i].flags & 0x80) continue; if (status[i].type == 0x20) { size = sizeof(status[i].name) + strlen(response); if (size > maxlen) { SAFE_FREE(status); request_error(state); return; } fstrcat(response, status[i].name); fstrcat(response, " "); } } /* make last character a newline */ response[strlen(response)-1] = '\n'; SAFE_FREE(status); } fstrcpy(state->response->data.winsresp,response); request_ok(state); } /* Get IP from hostname */ void winbindd_wins_byname(struct winbindd_cli_state *state) { struct sockaddr_storage *ip_list = NULL; int i, count, maxlen, size; fstring response; char addr[INET6_ADDRSTRLEN]; /* Ensure null termination */ state->request->data.winsreq[sizeof(state->request->data.winsreq)-1]='\0'; DEBUG(3, ("[%5lu]: wins_byname %s\n", (unsigned long)state->pid, state->request->data.winsreq)); *response = '\0'; maxlen = sizeof(response) - 1; if ((ip_list = lookup_byname_backend(state->request->data.winsreq,&count))){ for (i = count; i ; i--) { print_sockaddr(addr, sizeof(addr), &ip_list[i-1]); size = strlen(addr); if (size > maxlen) { SAFE_FREE(ip_list); request_error(state); return; } if (i != 0) { /* Clear out the newline character */ /* But only if there is something in there, otherwise we clobber something in the stack */ if (strlen(response)) { response[strlen(response)-1] = ' '; } } fstrcat(response,addr); fstrcat(response,"\t"); } size = strlen(state->request->data.winsreq) + strlen(response); if (size > maxlen) { SAFE_FREE(ip_list); request_error(state); return; } fstrcat(response,state->request->data.winsreq); fstrcat(response,"\n"); SAFE_FREE(ip_list); } else { request_error(state); return; } fstrcpy(state->response->data.winsresp,response); request_ok(state); }