*/
#include "includes.h"
+#include "nmbd/nmbd.h"
+#include "../lib/util/select.h"
extern int ClientNMB;
extern int ClientDGRAM;
extern int num_response_packets;
-static void queue_packet(struct packet_struct *packet);
-
bool rescan_listen_set = False;
packet->ip = to_ip;
packet->port = NMB_PORT;
- packet->fd = ClientNMB;
+ packet->recv_fd = -1;
+ packet->send_fd = ClientNMB;
packet->timestamp = time(NULL);
packet->packet_type = NMB_PACKET;
packet->locked = False;
our standard refresh cycle for that name which copes nicely
with disconnected networks.
*/
- packet->fd = find_subnet_fd_for_address(*register_ip);
+ packet->recv_fd = -1;
+ packet->send_fd = find_subnet_fd_for_address(*register_ip);
return True;
}
return NULL;
in_addr_to_sockaddr_storage(&ss, subrec->bcast_ip);
- pss = iface_ip(&ss);
+ pss = iface_ip((struct sockaddr *)&ss);
if (!pss || pss->ss_family != AF_INET) {
p->locked = False;
free_packet(p);
}
DEBUG(10,("queue_query_name: using source IP %s\n",inet_ntoa(*ifip)));
- p->fd = find_subnet_fd_for_address( *ifip );
+ p->send_fd = find_subnet_fd_for_address( *ifip );
break;
}
}
}
packet.packet_type = NMB_PACKET;
+ packet.recv_fd = -1;
/* Ensure we send out on the same fd that the original
packet came in on to give the correct source IP address. */
- packet.fd = orig_packet->fd;
+ if (orig_packet->send_fd != -1) {
+ packet.send_fd = orig_packet->send_fd;
+ } else {
+ packet.send_fd = orig_packet->recv_fd;
+ }
packet.timestamp = time(NULL);
debug_nmb_packet(&packet);
Queue a packet into a packet queue
******************************************************************/
-static void queue_packet(struct packet_struct *packet)
+void queue_packet(struct packet_struct *packet)
{
- struct packet_struct *p;
-
- if (!packet_queue) {
- packet->prev = NULL;
- packet->next = NULL;
- packet_queue = packet;
- return;
- }
-
- /* find the bottom */
- for (p=packet_queue;p->next;p=p->next)
- ;
-
- p->next = packet;
- packet->next = NULL;
- packet->prev = p;
+ DLIST_ADD_END(packet_queue, packet, struct packet_struct *);
}
/****************************************************************************
pull_ascii_nstring(src_name, sizeof(src_name), dgram->source_name.name);
if (is_myname(src_name)) {
- DEBUG(0,("process_browse_packet: Discarding datagram from IP %s. Source name \
+ DEBUG(7,("process_browse_packet: Discarding datagram from IP %s. Source name \
%s is one of our names !\n", inet_ntoa(p->ip), nmb_namestr(&dgram->source_name)));
return;
}
struct packet_struct *p;
while ((p = packet_queue)) {
- packet_queue = p->next;
- if (packet_queue)
- packet_queue->prev = NULL;
- p->next = p->prev = NULL;
+ DLIST_REMOVE(packet_queue, p);
switch (p->packet_type) {
case NMB_PACKET:
for (subrec = FIRST_SUBNET; subrec; subrec = get_next_subnet_maybe_unicast_or_wins_server(subrec)) {
struct response_record *rrec, *nextrrec;
+ restart:
+
for (rrec = subrec->responselist; rrec; rrec = nextrrec) {
nextrrec = rrec->next;
no timeout function. */
remove_response_record(subrec, rrec);
}
+ /* We have changed subrec->responselist,
+ * restart from the beginning of this list. */
+ goto restart;
} /* !rrec->in_expitation_processing */
} /* rrec->repeat_count > 0 */
} /* rrec->repeat_time <= t */
return True;
}
+ /* The Client* sockets */
+ count++;
+
/* Check that we can add all the fd's we need. */
for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
count++;
- if((count*2) + 2 > FD_SETSIZE) {
+ /* each interface gets 4 sockets */
+ count *= 4;
+
+ if(count > FD_SETSIZE) {
DEBUG(0,("create_listen_fdset: Too many file descriptors needed (%d). We can \
-only use %d.\n", (count*2) + 2, FD_SETSIZE));
+only use %d.\n", count, FD_SETSIZE));
SAFE_FREE(pset);
return True;
}
- if((sock_array = SMB_MALLOC_ARRAY(int, (count*2) + 2)) == NULL) {
- DEBUG(0,("create_listen_fdset: malloc fail for socket array.\n"));
+ if((sock_array = SMB_MALLOC_ARRAY(int, count)) == NULL) {
+ DEBUG(0,("create_listen_fdset: malloc fail for socket array. size %d\n", count));
SAFE_FREE(pset);
return True;
}
FD_ZERO(pset);
- /* Add in the broadcast socket on 137. */
+ /* Add in the lp_socket_address() interface on 137. */
FD_SET(ClientNMB,pset);
sock_array[num++] = ClientNMB;
*maxfd = MAX( *maxfd, ClientNMB);
+ /* the lp_socket_address() interface has only one socket */
+ sock_array[num++] = -1;
+
/* Add in the 137 sockets on all the interfaces. */
for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
FD_SET(subrec->nmb_sock,pset);
sock_array[num++] = subrec->nmb_sock;
*maxfd = MAX( *maxfd, subrec->nmb_sock);
+
+ sock_array[num++] = subrec->nmb_bcast;
+ if (subrec->nmb_bcast != -1) {
+ FD_SET(subrec->nmb_bcast,pset);
+ *maxfd = MAX( *maxfd, subrec->nmb_bcast);
+ }
}
- /* Add in the broadcast socket on 138. */
+ /* Add in the lp_socket_address() interface on 138. */
FD_SET(ClientDGRAM,pset);
sock_array[num++] = ClientDGRAM;
*maxfd = MAX( *maxfd, ClientDGRAM);
+ /* the lp_socket_address() interface has only one socket */
+ sock_array[num++] = -1;
+
/* Add in the 138 sockets on all the interfaces. */
for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
FD_SET(subrec->dgram_sock,pset);
sock_array[num++] = subrec->dgram_sock;
*maxfd = MAX( *maxfd, subrec->dgram_sock);
+
+ sock_array[num++] = subrec->dgram_bcast;
+ if (subrec->dgram_bcast != -1) {
+ FD_SET(subrec->dgram_bcast,pset);
+ *maxfd = MAX( *maxfd, subrec->dgram_bcast);
+ }
}
- *listen_number = (count*2) + 2;
+ *listen_number = count;
SAFE_FREE(*ppset);
SAFE_FREE(*psock_array);
return False;
}
+/****************************************************************************
+ List of packets we're processing this select.
+***************************************************************************/
+
+struct processed_packet {
+ struct processed_packet *next;
+ struct processed_packet *prev;
+ enum packet_type packet_type;
+ struct in_addr ip;
+ int packet_id;
+};
+
+/****************************************************************************
+ Have we seen this before ?
+***************************************************************************/
+
+static bool is_processed_packet(struct processed_packet *processed_packet_list,
+ struct packet_struct *packet)
+{
+ struct processed_packet *p = NULL;
+
+ for (p = processed_packet_list; p; p = p->next) {
+ if (ip_equal_v4(p->ip, packet->ip) && p->packet_type == packet->packet_type) {
+ if ((p->packet_type == NMB_PACKET) &&
+ (p->packet_id ==
+ packet->packet.nmb.header.name_trn_id)) {
+ return true;
+ } else if ((p->packet_type == DGRAM_PACKET) &&
+ (p->packet_id ==
+ packet->packet.dgram.header.dgm_id)) {
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+/****************************************************************************
+ Keep a list of what we've seen before.
+***************************************************************************/
+
+static bool store_processed_packet(struct processed_packet **pp_processed_packet_list,
+ struct packet_struct *packet)
+{
+ struct processed_packet *p = SMB_MALLOC_P(struct processed_packet);
+ if (!p) {
+ return false;
+ }
+ p->packet_type = packet->packet_type;
+ p->ip = packet->ip;
+ if (packet->packet_type == NMB_PACKET) {
+ p->packet_id = packet->packet.nmb.header.name_trn_id;
+ } else if (packet->packet_type == DGRAM_PACKET) {
+ p->packet_id = packet->packet.dgram.header.dgm_id;
+ } else {
+ return false;
+ }
+
+ DLIST_ADD(*pp_processed_packet_list, p);
+ return true;
+}
+
+/****************************************************************************
+ Throw away what we've seen before.
+***************************************************************************/
+
+static void free_processed_packet_list(struct processed_packet **pp_processed_packet_list)
+{
+ struct processed_packet *p = NULL, *next = NULL;
+
+ for (p = *pp_processed_packet_list; p; p = next) {
+ next = p->next;
+ DLIST_REMOVE(*pp_processed_packet_list, p);
+ SAFE_FREE(p);
+ }
+}
+
/****************************************************************************
Listens for NMB or DGRAM packets, and queues them.
return True if the socket is dead
#ifndef SYNC_DNS
int dns_fd;
#endif
+ struct processed_packet *processed_packet_list = NULL;
if(listen_set == NULL || rescan_listen_set) {
if(create_listen_fdset(&listen_set, &sock_array, &listen_number, &maxfd)) {
}
#endif
+ /* Process a signal and timer events now... */
+ if (run_events(nmbd_event_context(), 0, NULL, NULL)) {
+ return False;
+ }
+
/*
* During elections and when expecting a netbios response packet we
* need to send election packets at tighter intervals.
&r_fds, &w_fds, &timeout, &maxfd);
}
- if (timeval_is_zero(&timeout)) {
- /* Process a timed event now... */
- if (run_events(nmbd_event_context(), 0, NULL, NULL)) {
- return False;
- }
- }
-
- /* Prepare for the select - allow certain signals. */
-
- BlockSignals(False, SIGTERM);
-
selrtn = sys_select(maxfd+1,&r_fds,&w_fds,NULL,&timeout);
- /* We can only take signals when we are in the select - block them again here. */
-
- BlockSignals(True, SIGTERM);
-
- if(selrtn == -1) {
+ if (run_events(nmbd_event_context(), selrtn, &r_fds, &w_fds)) {
return False;
}
- if (run_events(nmbd_event_context(), selrtn, &r_fds, &w_fds)) {
+ if (selrtn == -1) {
return False;
}
#endif
for(i = 0; i < listen_number; i++) {
+ enum packet_type packet_type;
+ struct packet_struct *packet;
+ const char *packet_name;
+ int client_fd;
+ int client_port;
+
+ if (sock_array[i] == -1) {
+ continue;
+ }
+
+ if (!FD_ISSET(sock_array[i],&r_fds)) {
+ continue;
+ }
+
if (i < (listen_number/2)) {
- /* Processing a 137 socket. */
- if (FD_ISSET(sock_array[i],&r_fds)) {
- struct packet_struct *packet = read_packet(sock_array[i], NMB_PACKET);
- if (packet) {
- /*
- * If we got a packet on the broadcast socket and interfaces
- * only is set then check it came from one of our local nets.
- */
- if(lp_bind_interfaces_only() && (sock_array[i] == ClientNMB) &&
- (!is_local_net_v4(packet->ip))) {
- DEBUG(7,("discarding nmb packet sent to broadcast socket from %s:%d\n",
- inet_ntoa(packet->ip),packet->port));
- free_packet(packet);
- } else if ((is_loopback_ip_v4(packet->ip) ||
- ismyip_v4(packet->ip)) && packet->port == global_nmb_port &&
- packet->packet.nmb.header.nm_flags.bcast) {
- DEBUG(7,("discarding own bcast packet from %s:%d\n",
- inet_ntoa(packet->ip),packet->port));
- free_packet(packet);
- } else {
- /* Save the file descriptor this packet came in on. */
- packet->fd = sock_array[i];
- queue_packet(packet);
- }
- }
- }
+ /* Port 137 */
+ packet_type = NMB_PACKET;
+ packet_name = "nmb";
+ client_fd = ClientNMB;
+ client_port = global_nmb_port;
} else {
- /* Processing a 138 socket. */
- if (FD_ISSET(sock_array[i],&r_fds)) {
- struct packet_struct *packet = read_packet(sock_array[i], DGRAM_PACKET);
- if (packet) {
- /*
- * If we got a packet on the broadcast socket and interfaces
- * only is set then check it came from one of our local nets.
- */
- if(lp_bind_interfaces_only() && (sock_array[i] == ClientDGRAM) &&
- (!is_local_net_v4(packet->ip))) {
- DEBUG(7,("discarding dgram packet sent to broadcast socket from %s:%d\n",
- inet_ntoa(packet->ip),packet->port));
- free_packet(packet);
- } else if ((is_loopback_ip_v4(packet->ip) ||
- ismyip_v4(packet->ip)) && packet->port == DGRAM_PORT) {
- DEBUG(7,("discarding own dgram packet from %s:%d\n",
- inet_ntoa(packet->ip),packet->port));
- free_packet(packet);
- } else {
- /* Save the file descriptor this packet came in on. */
- packet->fd = sock_array[i];
- queue_packet(packet);
- }
- }
+ /* Port 138 */
+ packet_type = DGRAM_PACKET;
+ packet_name = "dgram";
+ client_fd = ClientDGRAM;
+ client_port = DGRAM_PORT;
+ }
+
+ packet = read_packet(sock_array[i], packet_type);
+ if (!packet) {
+ continue;
+ }
+
+ /*
+ * If we got a packet on the broadcast socket and interfaces
+ * only is set then check it came from one of our local nets.
+ */
+ if (lp_bind_interfaces_only() &&
+ (sock_array[i] == client_fd) &&
+ (!is_local_net_v4(packet->ip))) {
+ DEBUG(7,("discarding %s packet sent to broadcast socket from %s:%d\n",
+ packet_name, inet_ntoa(packet->ip), packet->port));
+ free_packet(packet);
+ continue;
+ }
+
+ if ((is_loopback_ip_v4(packet->ip) || ismyip_v4(packet->ip)) &&
+ packet->port == client_port)
+ {
+ if (client_port == DGRAM_PORT) {
+ DEBUG(7,("discarding own dgram packet from %s:%d\n",
+ inet_ntoa(packet->ip),packet->port));
+ free_packet(packet);
+ continue;
+ }
+
+ if (packet->packet.nmb.header.nm_flags.bcast) {
+ DEBUG(7,("discarding own nmb bcast packet from %s:%d\n",
+ inet_ntoa(packet->ip),packet->port));
+ free_packet(packet);
+ continue;
}
- } /* end processing 138 socket. */
- } /* end for */
+ }
+
+
+ if (is_processed_packet(processed_packet_list, packet)) {
+ DEBUG(7,("discarding duplicate packet from %s:%d\n",
+ inet_ntoa(packet->ip),packet->port));
+ free_packet(packet);
+ continue;
+ }
+
+ store_processed_packet(&processed_packet_list, packet);
+
+ /*
+ * 0,2,4,... are unicast sockets
+ * 1,3,5,... are broadcast sockets
+ *
+ * on broadcast socket we only receive packets
+ * and send replies via the unicast socket.
+ *
+ * 0,1 and 2,3 and ... belong together.
+ */
+ if ((i % 2) != 0) {
+ /* this is a broadcast socket */
+ packet->send_fd = sock_array[i-1];
+ } else {
+ /* this is already a unicast socket */
+ packet->send_fd = sock_array[i];
+ }
+
+ queue_packet(packet);
+ }
+
+ free_processed_packet_list(&processed_packet_list);
return False;
}
return false;
}
- set_message(ptr,17,strlen(mailslot) + 1 + len,True);
+ cli_set_message(ptr,17,strlen(mailslot) + 1 + len,True);
memcpy(ptr,tmp,4);
SCVAL(ptr,smb_com,SMBtrans);
DEBUG(0, ("send_mailslot: Cannot write beyond end of packet\n"));
return False;
} else {
- memcpy(p2,buf,len);
+ if (len) {
+ memcpy(p2,buf,len);
+ }
p2 += len;
}
p.ip = dest_ip;
p.port = dest_port;
- p.fd = find_subnet_mailslot_fd_for_address( src_ip );
+ p.recv_fd = -1;
+ p.send_fd = find_subnet_mailslot_fd_for_address( src_ip );
p.timestamp = time(NULL);
p.packet_type = DGRAM_PACKET;
git.samba.org / samba.git / blobdiff