ospfclient/ospfclient.c - quagga - Gitiles

 /*
  * Simple program to demonstrate how OSPF API can be used. This
  * application retrieves the LSDB from the OSPF daemon and then
  * originates, updates and finally deletes an application-specific
  * opaque LSA. You can use this application as a template when writing
  * your own application.
  */

 /* The following includes are needed in all OSPF API client
    applications. */

 #include <zebra.h>
 #include "prefix.h" /* needed by ospf_asbr.h */
 #include "privs.h"

 #include "ospfd/ospfd.h"
 #include "ospfd/ospf_asbr.h"
 #include "ospfd/ospf_lsa.h"
 #include "ospfd/ospf_opaque.h"
 #include "ospfd/ospf_api.h"
 #include "ospf_apiclient.h"

 /* privileges struct.
  * set cap_num_* and uid/gid to nothing to use NULL privs
  * as ospfapiclient links in libospf.a which uses privs.
  */
 struct zebra_privs_t ospfd_privs =
 {
   .user = NULL,
   .group = NULL,
   .cap_num_p = 0,
   .cap_num_i = 0
 };

 /* The following includes are specific to this application. For
    example it uses threads from libzebra, however your application is
    free to use any thread library (like pthreads). */

 #include "ospfd/ospf_dump.h" /* for ospf_lsa_header_dump */
 #include "thread.h"
 #include "log.h"

 /* Local portnumber for async channel. Note that OSPF API library will also
    allocate a sync channel at ASYNCPORT+1. */
 #define ASYNCPORT 4000

 /* Master thread */
 struct thread_master *master;

 /* Global variables */
 struct ospf_apiclient *oclient;
 char **args;

 /* Our opaque LSAs have the following format. */
 struct my_opaque_lsa
 {
   struct lsa_header hdr; /* include common LSA header */
   u_char data[4]; /* our own data format then follows here */
 };


 /* ---------------------------------------------------------
  * Threads for asynchronous messages and LSA update/delete
  * ---------------------------------------------------------
  */

 static int
 lsa_delete (struct thread *t)
 {
   struct ospf_apiclient *oclient;
   struct in_addr area_id;
   int rc;

   oclient = THREAD_ARG (t);

   inet_aton (args[6], &area_id);

   printf ("Deleting LSA... ");
   rc = ospf_apiclient_lsa_delete (oclient,
 				  area_id,
 				  atoi (args[2]),       /* lsa type */
 				  atoi (args[3]),	/* opaque type */
 				  atoi (args[4]));	/* opaque ID */
   printf ("done, return code is = %d\n", rc);
   return rc;
 }

 static int
 lsa_inject (struct thread *t)
 {
   struct ospf_apiclient *cl;
   struct in_addr ifaddr;
   struct in_addr area_id;
   u_char lsa_type;
   u_char opaque_type;
   u_int32_t opaque_id;
   void *opaquedata;
   int opaquelen;

   static u_int32_t counter = 1;	/* Incremented each time invoked */
   int rc;

   cl = THREAD_ARG (t);

   inet_aton (args[5], &ifaddr);
   inet_aton (args[6], &area_id);
   lsa_type = atoi (args[2]);
   opaque_type = atoi (args[3]);
   opaque_id = atoi (args[4]);
   opaquedata = &counter;
   opaquelen = sizeof (u_int32_t);

   printf ("Originating/updating LSA with counter=%d... ", counter);
   rc = ospf_apiclient_lsa_originate(cl, ifaddr, area_id,
 				    lsa_type,
 				    opaque_type, opaque_id,
 				    opaquedata, opaquelen);

   printf ("done, return code is %d\n", rc);

   counter++;

   return 0;
 }


 /* This thread handles asynchronous messages coming in from the OSPF
    API server */
 static int
 lsa_read (struct thread *thread)
 {
   struct ospf_apiclient *oclient;
   int fd;
   int ret;

   printf ("lsa_read called\n");

   oclient = THREAD_ARG (thread);
   fd = THREAD_FD (thread);

   /* Handle asynchronous message */
   ret = ospf_apiclient_handle_async (oclient);
   if (ret < 0) {
     printf ("Connection closed, exiting...");
     exit(0);
   }

   /* Reschedule read thread */
   thread_add_read (master, lsa_read, oclient, fd);

   return 0;
 }

 /* ---------------------------------------------------------
  * Callback functions for asynchronous events
  * ---------------------------------------------------------
  */

 static void
 lsa_update_callback (struct in_addr ifaddr, struct in_addr area_id,
 		     u_char is_self_originated,
 		     struct lsa_header *lsa)
 {
   printf ("lsa_update_callback: ");
   printf ("ifaddr: %s ", inet_ntoa (ifaddr));
   printf ("area: %s\n", inet_ntoa (area_id));
   printf ("is_self_origin: %u\n", is_self_originated);

   /* It is important to note that lsa_header does indeed include the
      header and the LSA payload. To access the payload, first check
      the LSA type and then typecast lsa into the corresponding type,
      e.g.:

      if (lsa->type == OSPF_ROUTER_LSA) {
        struct router_lsa *rl = (struct router_lsa) lsa;
        ...
        u_int16_t links = rl->links;
        ...
     }
   */

   ospf_lsa_header_dump (lsa);
 }

 static void
 lsa_delete_callback (struct in_addr ifaddr, struct in_addr area_id,
 		     u_char is_self_originated,
 		     struct lsa_header *lsa)
 {
   printf ("lsa_delete_callback: ");
   printf ("ifaddr: %s ", inet_ntoa (ifaddr));
   printf ("area: %s\n", inet_ntoa (area_id));
   printf ("is_self_origin: %u\n", is_self_originated);

   ospf_lsa_header_dump (lsa);
 }

 static void
 ready_callback (u_char lsa_type, u_char opaque_type, struct in_addr addr)
 {
   printf ("ready_callback: lsa_type: %d opaque_type: %d addr=%s\n",
 	  lsa_type, opaque_type, inet_ntoa (addr));

   /* Schedule opaque LSA originate in 5 secs */
   thread_add_timer (master, lsa_inject, oclient, 5);

   /* Schedule opaque LSA update with new value */
   thread_add_timer (master, lsa_inject, oclient, 10);

   /* Schedule delete */
   thread_add_timer (master, lsa_delete, oclient, 30);
 }

 static void
 new_if_callback (struct in_addr ifaddr, struct in_addr area_id)
 {
   printf ("new_if_callback: ifaddr: %s ", inet_ntoa (ifaddr));
   printf ("area_id: %s\n", inet_ntoa (area_id));
 }

 static void
 del_if_callback (struct in_addr ifaddr)
 {
   printf ("new_if_callback: ifaddr: %s\n ", inet_ntoa (ifaddr));
 }

 static void
 ism_change_callback (struct in_addr ifaddr, struct in_addr area_id,
 		     u_char state)
 {
   printf ("ism_change: ifaddr: %s ", inet_ntoa (ifaddr));
   printf ("area_id: %s\n", inet_ntoa (area_id));
   printf ("state: %d [%s]\n", state, LOOKUP (ospf_ism_state_msg, state));
 }

 static void
 nsm_change_callback (struct in_addr ifaddr, struct in_addr nbraddr,
 		     struct in_addr router_id, u_char state)
 {
   printf ("nsm_change: ifaddr: %s ", inet_ntoa (ifaddr));
   printf ("nbraddr: %s\n", inet_ntoa (nbraddr));
   printf ("router_id: %s\n", inet_ntoa (router_id));
   printf ("state: %d [%s]\n", state, LOOKUP (ospf_nsm_state_msg, state));
 }


 /* ---------------------------------------------------------
  * Main program
  * ---------------------------------------------------------
  */

 static int usage()
 {
   printf("Usage: ospfclient <ospfd> <lsatype> <opaquetype> <opaqueid> <ifaddr> <areaid>\n");
   printf("where ospfd     : router where API-enabled OSPF daemon is running\n");
   printf("      lsatype   : either 9, 10, or 11 depending on flooding scope\n");
   printf("      opaquetype: 0-255 (e.g., experimental applications use > 128)\n");
   printf("      opaqueid  : arbitrary application instance (24 bits)\n");
   printf("      ifaddr    : interface IP address (for type 9) otherwise ignored\n");
   printf("      areaid    : area in IP address format (for type 10) otherwise ignored\n");

   exit(1);
 }

 int
 main (int argc, char *argv[])
 {
   struct thread thread;

   args = argv;

   /* ospfclient should be started with the following arguments:
    *
    * (1) host (2) lsa_type (3) opaque_type (4) opaque_id (5) if_addr
    * (6) area_id
    *
    * host: name or IP of host where ospfd is running
    * lsa_type: 9, 10, or 11
    * opaque_type: 0-255 (e.g., experimental applications use > 128)
    * opaque_id: arbitrary application instance (24 bits)
    * if_addr: interface IP address (for type 9) otherwise ignored
    * area_id: area in IP address format (for type 10) otherwise ignored
    */

   if (argc != 7)
     {
       usage();
     }

   /* Initialization */
   zprivs_init (&ospfd_privs);
   master = thread_master_create ();

   /* Open connection to OSPF daemon */
   oclient = ospf_apiclient_connect (args[1], ASYNCPORT);
   if (!oclient)
     {
       printf ("Connecting to OSPF daemon on %s failed!\n",
 	      args[1]);
       exit (1);
     }

   /* Register callback functions. */
   ospf_apiclient_register_callback (oclient,
 				    ready_callback,
 				    new_if_callback,
 				    del_if_callback,
 				    ism_change_callback,
 				    nsm_change_callback,
 				    lsa_update_callback,
 				    lsa_delete_callback);

   /* Register LSA type and opaque type. */
   ospf_apiclient_register_opaque_type (oclient, atoi (args[2]),
 				       atoi (args[3]));

   /* Synchronize database with OSPF daemon. */
   ospf_apiclient_sync_lsdb (oclient);

   /* Schedule thread that handles asynchronous messages */
   thread_add_read (master, lsa_read, oclient, oclient->fd_async);

   /* Now connection is established, run loop */
   while (1)
     {
       thread_fetch (master, &thread);
       thread_call (&thread);
     }

   /* Never reached */
   return 0;
 }
	/*
	* Simple program to demonstrate how OSPF API can be used. This
	* application retrieves the LSDB from the OSPF daemon and then
	* originates, updates and finally deletes an application-specific
	* opaque LSA. You can use this application as a template when writing
	* your own application.
	*/

	/* The following includes are needed in all OSPF API client
	applications. */

	#include <zebra.h>
	#include "prefix.h" /* needed by ospf_asbr.h */
	#include "privs.h"

	#include "ospfd/ospfd.h"
	#include "ospfd/ospf_asbr.h"
	#include "ospfd/ospf_lsa.h"
	#include "ospfd/ospf_opaque.h"
	#include "ospfd/ospf_api.h"
	#include "ospf_apiclient.h"

	/* privileges struct.
	* set cap_num_* and uid/gid to nothing to use NULL privs
	* as ospfapiclient links in libospf.a which uses privs.
	*/
	struct zebra_privs_t ospfd_privs =
	{
	.user = NULL,
	.group = NULL,
	.cap_num_p = 0,
	.cap_num_i = 0
	};

	/* The following includes are specific to this application. For
	example it uses threads from libzebra, however your application is
	free to use any thread library (like pthreads). */

	#include "ospfd/ospf_dump.h" /* for ospf_lsa_header_dump */
	#include "thread.h"
	#include "log.h"

	/* Local portnumber for async channel. Note that OSPF API library will also
	allocate a sync channel at ASYNCPORT+1. */
	#define ASYNCPORT 4000

	/* Master thread */
	struct thread_master *master;

	/* Global variables */
	struct ospf_apiclient *oclient;
	char **args;

	/* Our opaque LSAs have the following format. */
	struct my_opaque_lsa
	{
	struct lsa_header hdr; /* include common LSA header */
	u_char data[4]; /* our own data format then follows here */
	};


	/* ---------------------------------------------------------
	* Threads for asynchronous messages and LSA update/delete
	* ---------------------------------------------------------
	*/

	static int
	lsa_delete (struct thread *t)
	{
	struct ospf_apiclient *oclient;
	struct in_addr area_id;
	int rc;

	oclient = THREAD_ARG (t);

	inet_aton (args[6], &area_id);

	printf ("Deleting LSA... ");
	rc = ospf_apiclient_lsa_delete (oclient,
	area_id,
	atoi (args[2]), /* lsa type */
	atoi (args[3]), /* opaque type */
	atoi (args[4])); /* opaque ID */
	printf ("done, return code is = %d\n", rc);
	return rc;
	}

	static int
	lsa_inject (struct thread *t)
	{
	struct ospf_apiclient *cl;
	struct in_addr ifaddr;
	struct in_addr area_id;
	u_char lsa_type;
	u_char opaque_type;
	u_int32_t opaque_id;
	void *opaquedata;
	int opaquelen;

	static u_int32_t counter = 1; /* Incremented each time invoked */
	int rc;

	cl = THREAD_ARG (t);

	inet_aton (args[5], &ifaddr);
	inet_aton (args[6], &area_id);
	lsa_type = atoi (args[2]);
	opaque_type = atoi (args[3]);
	opaque_id = atoi (args[4]);
	opaquedata = &counter;
	opaquelen = sizeof (u_int32_t);

	printf ("Originating/updating LSA with counter=%d... ", counter);
	rc = ospf_apiclient_lsa_originate(cl, ifaddr, area_id,
	lsa_type,
	opaque_type, opaque_id,
	opaquedata, opaquelen);

	printf ("done, return code is %d\n", rc);

	counter++;

	return 0;
	}


	/* This thread handles asynchronous messages coming in from the OSPF
	API server */
	static int
	lsa_read (struct thread *thread)
	{
	struct ospf_apiclient *oclient;
	int fd;
	int ret;

	printf ("lsa_read called\n");

	oclient = THREAD_ARG (thread);
	fd = THREAD_FD (thread);

	/* Handle asynchronous message */
	ret = ospf_apiclient_handle_async (oclient);
	if (ret < 0) {
	printf ("Connection closed, exiting...");
	exit(0);
	}

	/* Reschedule read thread */
	thread_add_read (master, lsa_read, oclient, fd);

	return 0;
	}

	/* ---------------------------------------------------------
	* Callback functions for asynchronous events
	* ---------------------------------------------------------
	*/

	static void
	lsa_update_callback (struct in_addr ifaddr, struct in_addr area_id,
	u_char is_self_originated,
	struct lsa_header *lsa)
	{
	printf ("lsa_update_callback: ");
	printf ("ifaddr: %s ", inet_ntoa (ifaddr));
	printf ("area: %s\n", inet_ntoa (area_id));
	printf ("is_self_origin: %u\n", is_self_originated);

	/* It is important to note that lsa_header does indeed include the
	header and the LSA payload. To access the payload, first check
	the LSA type and then typecast lsa into the corresponding type,
	e.g.:

	if (lsa->type == OSPF_ROUTER_LSA) {
	struct router_lsa *rl = (struct router_lsa) lsa;
	...
	u_int16_t links = rl->links;
	...
	}
	*/

	ospf_lsa_header_dump (lsa);
	}

	static void
	lsa_delete_callback (struct in_addr ifaddr, struct in_addr area_id,
	u_char is_self_originated,
	struct lsa_header *lsa)
	{
	printf ("lsa_delete_callback: ");
	printf ("ifaddr: %s ", inet_ntoa (ifaddr));
	printf ("area: %s\n", inet_ntoa (area_id));
	printf ("is_self_origin: %u\n", is_self_originated);

	ospf_lsa_header_dump (lsa);
	}

	static void
	ready_callback (u_char lsa_type, u_char opaque_type, struct in_addr addr)
	{
	printf ("ready_callback: lsa_type: %d opaque_type: %d addr=%s\n",
	lsa_type, opaque_type, inet_ntoa (addr));

	/* Schedule opaque LSA originate in 5 secs */
	thread_add_timer (master, lsa_inject, oclient, 5);

	/* Schedule opaque LSA update with new value */
	thread_add_timer (master, lsa_inject, oclient, 10);

	/* Schedule delete */
	thread_add_timer (master, lsa_delete, oclient, 30);
	}

	static void
	new_if_callback (struct in_addr ifaddr, struct in_addr area_id)
	{
	printf ("new_if_callback: ifaddr: %s ", inet_ntoa (ifaddr));
	printf ("area_id: %s\n", inet_ntoa (area_id));
	}

	static void
	del_if_callback (struct in_addr ifaddr)
	{
	printf ("new_if_callback: ifaddr: %s\n ", inet_ntoa (ifaddr));
	}

	static void
	ism_change_callback (struct in_addr ifaddr, struct in_addr area_id,
	u_char state)
	{
	printf ("ism_change: ifaddr: %s ", inet_ntoa (ifaddr));
	printf ("area_id: %s\n", inet_ntoa (area_id));
	printf ("state: %d [%s]\n", state, LOOKUP (ospf_ism_state_msg, state));
	}

	static void
	nsm_change_callback (struct in_addr ifaddr, struct in_addr nbraddr,
	struct in_addr router_id, u_char state)
	{
	printf ("nsm_change: ifaddr: %s ", inet_ntoa (ifaddr));
	printf ("nbraddr: %s\n", inet_ntoa (nbraddr));
	printf ("router_id: %s\n", inet_ntoa (router_id));
	printf ("state: %d [%s]\n", state, LOOKUP (ospf_nsm_state_msg, state));
	}


	/* ---------------------------------------------------------
	* Main program
	* ---------------------------------------------------------
	*/

	static int usage()
	{
	printf("Usage: ospfclient <ospfd> <lsatype> <opaquetype> <opaqueid> <ifaddr> <areaid>\n");
	printf("where ospfd : router where API-enabled OSPF daemon is running\n");
	printf(" lsatype : either 9, 10, or 11 depending on flooding scope\n");
	printf(" opaquetype: 0-255 (e.g., experimental applications use > 128)\n");
	printf(" opaqueid : arbitrary application instance (24 bits)\n");
	printf(" ifaddr : interface IP address (for type 9) otherwise ignored\n");
	printf(" areaid : area in IP address format (for type 10) otherwise ignored\n");

	exit(1);
	}

	int
	main (int argc, char *argv[])
	{
	struct thread thread;

	args = argv;

	/* ospfclient should be started with the following arguments:
	*
	* (1) host (2) lsa_type (3) opaque_type (4) opaque_id (5) if_addr
	* (6) area_id
	*
	* host: name or IP of host where ospfd is running
	* lsa_type: 9, 10, or 11
	* opaque_type: 0-255 (e.g., experimental applications use > 128)
	* opaque_id: arbitrary application instance (24 bits)
	* if_addr: interface IP address (for type 9) otherwise ignored
	* area_id: area in IP address format (for type 10) otherwise ignored
	*/

	if (argc != 7)
	{
	usage();
	}

	/* Initialization */
	zprivs_init (&ospfd_privs);
	master = thread_master_create ();

	/* Open connection to OSPF daemon */
	oclient = ospf_apiclient_connect (args[1], ASYNCPORT);
	if (!oclient)
	{
	printf ("Connecting to OSPF daemon on %s failed!\n",
	args[1]);
	exit (1);
	}

	/* Register callback functions. */
	ospf_apiclient_register_callback (oclient,
	ready_callback,
	new_if_callback,
	del_if_callback,
	ism_change_callback,
	nsm_change_callback,
	lsa_update_callback,
	lsa_delete_callback);

	/* Register LSA type and opaque type. */
	ospf_apiclient_register_opaque_type (oclient, atoi (args[2]),
	atoi (args[3]));

	/* Synchronize database with OSPF daemon. */
	ospf_apiclient_sync_lsdb (oclient);

	/* Schedule thread that handles asynchronous messages */
	thread_add_read (master, lsa_read, oclient, oclient->fd_async);

	/* Now connection is established, run loop */
	while (1)
	{
	thread_fetch (master, &thread);
	thread_call (&thread);
	}

	/* Never reached */
	return 0;
	}