nmbd/nmbd_subnetdb.c

ソースコードを見る。

関数
static void	add_subnet (struct subnet_record *subrec)
void	close_subnet (struct subnet_record *subrec)
static struct subnet_record *	make_subnet (const char *name, enum subnet_type type, struct in_addr myip, struct in_addr bcast_ip, struct in_addr mask_ip)
subnet_record *	make_normal_subnet (struct interface *iface)
BOOL	create_subnets (void)
BOOL	we_are_a_wins_client (void)
subnet_record *	get_next_subnet_maybe_unicast (struct subnet_record *subrec)
subnet_record *	get_next_subnet_maybe_unicast_or_wins_server (struct subnet_record *subrec)
変数
in_addr	loopback_ip
int	global_nmb_port
subnet_record *	subnetlist = NULL
subnet_record *	unicast_subnet = NULL
subnet_record *	remote_broadcast_subnet = NULL
subnet_record *	wins_server_subnet = NULL
uint16	samba_nb_type

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関数

static void add_subnet

(

struct subnet_record *

subrec

)

[static]

nmbd_subnetdb.c の 47 行で定義されています。

参照先 subnetlist.

参照元 make_normal_subnet().

{
        DLIST_ADD(subnetlist, subrec);
}

void close_subnet

(

struct subnet_record *

subrec

)

nmbd_subnetdb.c の 58 行で定義されています。

参照先 subnet_record::dgram_sock・subnet_record::nmb_sock・subnetlist.

{
        if (subrec->dgram_sock != -1) {
                close(subrec->dgram_sock);
                subrec->dgram_sock = -1;
        }
        if (subrec->nmb_sock != -1) {
                close(subrec->nmb_sock);
                subrec->nmb_sock = -1;
        }

        DLIST_REMOVE(subnetlist, subrec);
}

static struct subnet_record* make_subnet	(	const char *	name,
		enum subnet_type	type,
		struct in_addr	myip,
		struct in_addr	bcast_ip,
		struct in_addr	mask_ip
	)			[static]

nmbd_subnetdb.c の 76 行で定義されています。

参照先 subnet_record::bcast_ip・Debug1()・subnet_record::dgram_sock・errno・global_nmb_port・subnet_record::mask_ip・subnet_record::myip・subnet_record::namelist_changed・subnet_record::nmb_sock・NORMAL_SUBNET・open_socket_in()・set_blocking()・set_socket_options()・strerror()・subnet_record::subnet_name・subnet_record::type・subnet_record::work_changed.

参照元 make_normal_subnet().

{
        struct subnet_record *subrec = NULL;
        int nmb_sock, dgram_sock;

        /* Check if we are creating a non broadcast subnet - if so don't create
                sockets.  */

        if(type != NORMAL_SUBNET) {
                nmb_sock = -1;
                dgram_sock = -1;
        } else {
                /*
                 * Attempt to open the sockets on port 137/138 for this interface
                 * and bind them.
                 * Fail the subnet creation if this fails.
                 */

                if((nmb_sock = open_socket_in(SOCK_DGRAM, global_nmb_port,0, myip.s_addr,True)) == -1) {
                        if( DEBUGLVL( 0 ) ) {
                                Debug1( "nmbd_subnetdb:make_subnet()\n" );
                                Debug1( "  Failed to open nmb socket on interface %s ", inet_ntoa(myip) );
                                Debug1( "for port %d.  ", global_nmb_port );
                                Debug1( "Error was %s\n", strerror(errno) );
                        }
                        return NULL;
                }

                if((dgram_sock = open_socket_in(SOCK_DGRAM,DGRAM_PORT,3, myip.s_addr,True)) == -1) {
                        if( DEBUGLVL( 0 ) ) {
                                Debug1( "nmbd_subnetdb:make_subnet()\n" );
                                Debug1( "  Failed to open dgram socket on interface %s ", inet_ntoa(myip) );
                                Debug1( "for port %d.  ", DGRAM_PORT );
                                Debug1( "Error was %s\n", strerror(errno) );
                        }
                        return NULL;
                }

                /* Make sure we can broadcast from these sockets. */
                set_socket_options(nmb_sock,"SO_BROADCAST");
                set_socket_options(dgram_sock,"SO_BROADCAST");

                /* Set them non-blocking. */
                set_blocking(nmb_sock, False);
                set_blocking(dgram_sock, False);
        }

        subrec = SMB_MALLOC_P(struct subnet_record);
        if (!subrec) {
                DEBUG(0,("make_subnet: malloc fail !\n"));
                close(nmb_sock);
                close(dgram_sock);
                return(NULL);
        }
  
        ZERO_STRUCTP(subrec);

        if((subrec->subnet_name = SMB_STRDUP(name)) == NULL) {
                DEBUG(0,("make_subnet: malloc fail for subnet name !\n"));
                close(nmb_sock);
                close(dgram_sock);
                ZERO_STRUCTP(subrec);
                SAFE_FREE(subrec);
                return(NULL);
        }

        DEBUG(2, ("making subnet name:%s ", name ));
        DEBUG(2, ("Broadcast address:%s ", inet_ntoa(bcast_ip)));
        DEBUG(2, ("Subnet mask:%s\n", inet_ntoa(mask_ip)));
 
        subrec->namelist_changed = False;
        subrec->work_changed = False;
 
        subrec->bcast_ip = bcast_ip;
        subrec->mask_ip  = mask_ip;
        subrec->myip = myip;
        subrec->type = type;
        subrec->nmb_sock = nmb_sock;
        subrec->dgram_sock = dgram_sock;
  
        return subrec;
}

struct subnet_record* make_normal_subnet

(

struct interface *

iface

)

nmbd_subnetdb.c の 165 行で定義されています。

参照先 add_subnet()・interface::bcast・interface::ip・make_subnet()・interface::nmask・NORMAL_SUBNET.

参照元 create_subnets()・reload_interfaces().

{
        struct subnet_record *subrec;

        subrec = make_subnet(inet_ntoa(iface->ip), NORMAL_SUBNET,
                             iface->ip, iface->bcast, iface->nmask);
        if (subrec) {
                add_subnet(subrec);
        }
        return subrec;
}

BOOL create_subnets

(

void

)

nmbd_subnetdb.c の 181 行で定義されています。

参照先 CatchSignal()・get_interface()・iface_count()・iface_count_nl()・load_interfaces()・loopback_ip・make_normal_subnet().

参照元 main().

{    
        int num_interfaces;
        int i;
        struct in_addr unicast_ip, ipzero;

  try_interfaces_again:

        if (iface_count_nl() == 0) {
                DEBUG(0,("create_subnets: No non-loopback local interfaces !\n"));
                DEBUG(0,("create_subnets: Waiting for an interface to appear ...\n"));
        }

        while (iface_count_nl() == 0) {
                void (*saved_handler)(int);

                /* 
                 * Whilst we're waiting for an interface, allow SIGTERM to
                 * cause us to exit.
                 */

                saved_handler = CatchSignal( SIGTERM, SIGNAL_CAST SIG_DFL );

                sleep(5);
                load_interfaces();

                /* 
                 * We got an interface, restore our normal term handler.
                 */

                CatchSignal( SIGTERM, SIGNAL_CAST saved_handler );
        }

        num_interfaces = iface_count();

        /* 
         * Create subnets from all the local interfaces and thread them onto
         * the linked list. 
         */

        for (i = 0 ; i < num_interfaces; i++) {
                struct interface *iface = get_interface(i);

                if (!iface) {
                        DEBUG(2,("create_subnets: can't get interface %d.\n", i ));
                        continue;
                }

                /*
                 * We don't want to add a loopback interface, in case
                 * someone has added 127.0.0.1 for smbd, nmbd needs to
                 * ignore it here. JRA.
                 */

                if (ip_equal(iface->ip, loopback_ip)) {
                        DEBUG(2,("create_subnets: Ignoring loopback interface.\n" ));
                        continue;
                }

                if (!make_normal_subnet(iface))
                        return False;
        }

        /* We must have at least one subnet. */
        if (subnetlist == NULL) {
                void (*saved_handler)(int);

                DEBUG(0,("create_subnets: Unable to create any subnet from "
                                "given interfaces. Is your interface line in "
                                "smb.conf correct ?\n"));

                saved_handler = CatchSignal( SIGTERM, SIGNAL_CAST SIG_DFL );

                sleep(5);
                load_interfaces();

                CatchSignal( SIGTERM, SIGNAL_CAST saved_handler );
                goto try_interfaces_again;
        }

        if (lp_we_are_a_wins_server()) {
                /* Pick the first interface ip address as the WINS server ip. */
                struct in_addr *nip = iface_n_ip(0);

                if (!nip) {
                        return False;
                }

                unicast_ip = *nip;
        } else {
                /* note that we do not set the wins server IP here. We just
                        set it at zero and let the wins registration code cope
                        with getting the IPs right for each packet */
                zero_ip(&unicast_ip);
        }

        /*
         * Create the unicast and remote broadcast subnets.
         * Don't put these onto the linked list.
         * The ip address of the unicast subnet is set to be
         * the WINS server address, if it exists, or ipzero if not.
         */

        unicast_subnet = make_subnet( "UNICAST_SUBNET", UNICAST_SUBNET, 
                                unicast_ip, unicast_ip, unicast_ip);

        zero_ip(&ipzero);

        remote_broadcast_subnet = make_subnet( "REMOTE_BROADCAST_SUBNET",
                                REMOTE_BROADCAST_SUBNET,
                                ipzero, ipzero, ipzero);

        if((unicast_subnet == NULL) || (remote_broadcast_subnet == NULL))
                return False;

        /* 
         * If we are WINS server, create the WINS_SERVER_SUBNET - don't put on
         * the linked list.
         */

        if (lp_we_are_a_wins_server()) {
                if( (wins_server_subnet = make_subnet( "WINS_SERVER_SUBNET",
                                                WINS_SERVER_SUBNET, 
                                                ipzero, ipzero, ipzero )) == NULL )
                        return False;
        }

        return True;
}

BOOL we_are_a_wins_client

(

void

)

nmbd_subnetdb.c の 315 行で定義されています。

参照先 wins_srv_count().

参照元 add_domain_names()・announce_and_sync_with_domain_master_browser()・announce_myself_to_domain_master_browser()・collect_all_workgroup_names_from_wins_server()・dump_all_namelists()・get_next_subnet_maybe_unicast()・get_next_subnet_maybe_unicast_or_wins_server()・insert_refresh_name_into_unicast()・sync_all_dmbs().

{
        if (wins_srv_count() > 0) {
                return True;
        }

        return False;
}

struct subnet_record* get_next_subnet_maybe_unicast

(

struct subnet_record *

subrec

)

nmbd_subnetdb.c の 328 行で定義されています。

参照先 subnet_record::next・unicast_subnet・we_are_a_wins_client().

{
        if(subrec == unicast_subnet)
                return NULL;
        else if((subrec->next == NULL) && we_are_a_wins_client())
                return unicast_subnet;
        else
                return subrec->next;
}

struct subnet_record* get_next_subnet_maybe_unicast_or_wins_server

(

struct subnet_record *

subrec

)

nmbd_subnetdb.c の 345 行で定義されています。

参照先 subnet_record::next・unicast_subnet・we_are_a_wins_client()・wins_server_subnet.

参照元 retransmit_or_expire_response_records().

{
        if(subrec == unicast_subnet) {
                if(wins_server_subnet)
                        return wins_server_subnet;
                else
                        return NULL;
        }

        if(wins_server_subnet && subrec == wins_server_subnet)
                return NULL;

        if((subrec->next == NULL) && we_are_a_wins_client())
                return unicast_subnet;
        else
                return subrec->next;
}

---

変数

struct in_addr loopback_ip

interface.c の 27 行で定義されています。

int global_nmb_port

nmbd.c の 28 行で定義されています。

参照元 listen_for_packets()・main()・make_subnet()・reply_netbios_packet()・send_netbios_packet().

struct subnet_record* subnetlist = NULL

nmbd_subnetdb.c の 32 行で定義されています。

参照元 add_subnet()・close_subnet()・reload_interfaces().

struct subnet_record* unicast_subnet = NULL

nmbd_subnetdb.c の 37 行で定義されています。

参照元 add_samba_names_to_subnet()・announce_and_sync_with_domain_master_browser()・become_domain_master_browser_wins()・become_domain_master_query_fail()・become_domain_master_stage2()・collect_all_workgroup_names_from_wins_server()・complete_one()・dump_all_namelists()・find_subnet_for_nmb_packet()・get_next_subnet_maybe_unicast()・get_next_subnet_maybe_unicast_or_wins_server()・initiate_myworkgroup_startup()・insert_permanent_name_into_unicast()・insert_refresh_name_into_unicast()・listening()・make_wins_proxy_name_query_request()・multihomed_register_name()・multihomed_register_one()・process_browse_packet()・process_get_backup_list_request()・process_node_status_request()・queue_node_status()・queue_query_name()・queue_register_multihomed_name()・queue_register_name()・queue_release_name()・queue_wins_refresh()・refresh_my_names()・register_my_workgroup_and_names()・register_name()・register_name_response()・release_name()・release_wins_names()・remove_permanent_name_from_unicast()・sync_all_dmbs()・sync_with_lmb()・wins_release_name()・write_this_workgroup_name().

struct subnet_record* remote_broadcast_subnet = NULL

nmbd_subnetdb.c の 38 行で定義されています。

参照元 add_samba_names_to_subnet()・assert_check_subnet()・dump_all_namelists()・find_name_in_lmhosts()・find_response_record()・find_subnet_for_nmb_packet()・initiate_myworkgroup_startup()・load_lmhosts_file()・process_name_query_request()・register_my_workgroup_and_names().

struct subnet_record* wins_server_subnet = NULL

nmbd_subnetdb.c の 39 行で定義されています。

参照元 add_dns_result()・add_ip_to_name_record()・add_name_to_subnet()・add_samba_names_to_subnet()・dump_all_namelists()・fetch_1b_traverse_fn()・find_name_on_subnet()・find_name_on_wins_subnet()・find_response_record()・find_subnet_for_nmb_packet()・get_next_subnet_maybe_unicast_or_wins_server()・initialise_wins()・initiate_myworkgroup_startup()・nmbd_wins_new_entry()・packet_is_for_wins_server()・process_nmb_request()・queue_query_name_from_wins_server()・remove_name_from_namelist()・remove_name_from_wins_namelist()・remove_nth_ip_in_record()・update_name_ttl()・wins_delete_all_tmp_in_memory_records()・wins_processing_traverse_fn()・wins_record_to_name_record().

uint16 samba_nb_type

nmbd_namelistdb.c の 26 行で定義されています。

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