res_pktccops.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2009, Attila Domjan
 *
 * Attila Domjan <[email protected]>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*!\file
 *
 * \brief PacketCable COPS
 *
 * \author Attila Domjan <[email protected]>
 *
 * \note
 * This module is an add-on to chan_mgcp. It adds support for the
 * PacketCable MGCP variation called NCS. Res_pktccops implements COPS
 * (RFC 2748), a protocol used to manage dynamic bandwith allocation in
 * CMTS's (HFC gateways). When you use NCS, you need to talk COPS with
 * the CMTS to complete the calls.
 */

/*** MODULEINFO
 <defaultenabled>no</defaultenabled>
 <support_level>extended</support_level>
 ***/

#include "asterisk.h"

#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <arpa/inet.h>
#include <signal.h>

#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/options.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/cli.h"
#include "asterisk/lock.h"
#define AST_API_MODULE
#include "asterisk/pktccops.h"

#define DEFAULT_COPS_PORT "2126"

#define COPS_HEADER_SIZE 8
#define COPS_OBJECT_HEADER_SIZE 4
#define GATE_SET_OBJ_SIZE 144
#define GATEID_OBJ_SIZE 8
#define GATE_INFO_OBJ_SIZE 24

#define PKTCCOPS_SCOMMAND_GATE_ALLOC 1
#define PKTCCOPS_SCOMMAND_GATE_ALLOC_ACK 2
#define PKTCCOPS_SCOMMAND_GATE_ALLOC_ERR 3
#define PKTCCOPS_SCOMMAND_GATE_SET 4
#define PKTCCOPS_SCOMMAND_GATE_SET_ACK 5
#define PKTCCOPS_SCOMMAND_GATE_SET_ERR 6
#define PKTCCOPS_SCOMMAND_GATE_INFO 7
#define PKTCCOPS_SCOMMAND_GATE_INFO_ACK 8
#define PKTCCOPS_SCOMMAND_GATE_INFO_ERR 9
#define PKTCCOPS_SCOMMAND_GATE_DELETE 10
#define PKTCCOPS_SCOMMAND_GATE_DELETE_ACK 11
#define PKTCCOPS_SCOMMAND_GATE_DELETE_ERR 12
#define PKTCCOPS_SCOMMAND_GATE_OPEN 13
#define PKTCCOPS_SCOMMAND_GATE_CLOSE 14

AST_MUTEX_DEFINE_STATIC(pktccops_lock);
static pthread_t pktccops_thread = AST_PTHREADT_NULL;
static uint16_t cops_trid = 0;

struct pktcobj {
 uint16_t length;
 unsigned char cnum;
 unsigned char ctype;
 char *contents;
 struct pktcobj *next;
};

struct copsmsg {
 unsigned char verflag;
 unsigned char opcode;
 uint16_t clienttype;
 uint32_t length;
 struct pktcobj *object;
 char *msg; /* != NULL if not packet cable message received */
};

struct gatespec {
 int direction; /* 0-DS, 1-US */
 int protocolid;
 int flags; /* 0x00 */
 int sessionclass; /* normal voip: 0x01, high priority voip: 0x02, unspecified: 0x00 */
 uint32_t srcip;
 uint32_t dstip;
 uint16_t srcp;
 uint16_t dstp;
 int diffserv;
 uint16_t t1;
 uint16_t t7;
 uint16_t t8;
 uint32_t r; /* Token Bucket Rate */
 uint32_t b; /* token Bucket Size */
 uint32_t p; /* Peak Data Rate */
 uint32_t m; /* Minimum Policed Size*/
 uint32_t mm; /* Maximum Policed Size */
 uint32_t rate;
 uint32_t s; /* Allowable Jitter*/
};


struct cops_cmts {
 AST_LIST_ENTRY(cops_cmts) list;
 char name[80];
 char host[80];
 char port[80];
 uint16_t t1;
 uint16_t t7;
 uint16_t t8;
 uint32_t keepalive;

 uint32_t handle;
 int state;
 time_t contime;
 time_t katimer;
 int sfd;
 int need_delete;
};

struct cops_ippool {
 AST_LIST_ENTRY(cops_ippool) list;
 uint32_t start;
 uint32_t stop;
 struct cops_cmts *cmts;
};

static uint16_t t1 = 250;
static uint16_t t7 = 200;
static uint16_t t8 = 300;
static uint32_t keepalive = 60;
static int pktccopsdebug = 0;
static int pktcreload = 0;
static int gateinfoperiod = 60;
static int gatetimeout = 150;

AST_LIST_HEAD_STATIC(cmts_list, cops_cmts);
AST_LIST_HEAD_STATIC(ippool_list, cops_ippool);
AST_LIST_HEAD_STATIC(gate_list, cops_gate);

static int pktccops_add_ippool(struct cops_ippool *ippool);
static struct cops_gate *cops_gate_cmd(int cmd, struct cops_cmts *cmts, uint16_t trid, uint32_t mta, uint32_t actcount, float bitrate, uint32_t psize, uint32_t ssip, uint16_t ssport, struct cops_gate *gate);
static void pktccops_unregister_ippools(void);
static int load_pktccops_config(void);

static uint32_t ftoieeef(float n)
{
 uint32_t res;
 memcpy(&res, &n, 4);
 return htonl(res);
}

static uint16_t cops_constructgatespec(struct gatespec *gs, char *res)
{
 if (res == NULL) {
 return 0;
 }

 *res = (char) gs->direction;
 *(res + 1) = (char) gs->protocolid;
 *(res + 2) = (char) gs->flags;
 *(res + 3) = (char) gs->sessionclass;

 *((uint32_t *) (res + 4)) = gs->srcip;
 *((uint32_t *) (res + 8)) = gs->dstip;

 *((uint16_t *) (res + 12)) = gs->srcp;
 *((uint16_t *) (res + 14)) = gs->dstp;

 *(res + 16) = (char) gs->diffserv;
 *(res + 17) = 0; /* reserved */
 *(res + 18) = 0; /* reserved */
 *(res + 19) = 0; /* reserved */

 *((uint16_t *) (res + 20)) = gs->t1;
 *(res + 22) = 0; /* reserved */
 *(res + 23) = 0; /* reserved */

 *((uint16_t *) (res + 24)) = gs->t7;
 *((uint16_t *) (res + 26)) = gs->t8;

 *((uint32_t *) (res + 28)) = gs->r;
 *((uint32_t *) (res + 32)) = gs->b;
 *((uint32_t *) (res + 36)) = gs->p;
 *((uint32_t *) (res + 40)) = gs->m;
 *((uint32_t *) (res + 44)) = gs->mm;
 *((uint32_t *) (res + 48)) = gs->rate;
 *((uint32_t *) (res + 52)) = gs->s;
 return 56; /* length */
};

static uint16_t cops_construct_gate (int cmd, char *p, uint16_t trid,
 uint32_t mtahost, uint32_t actcount, float rate, uint32_t psizegateid,
 uint32_t ssip, uint16_t ssport, uint32_t gateid, struct cops_cmts *cmts)
{
 struct gatespec gs;
 int offset = 0;

 ast_debug(3, "CMD: %d\n", cmd);

 /* Transaction Identifier 8 octets */
 *(p + offset++) = 0;
 *(p + offset++) = 8; /* length */
 *(p + offset++) = 1; /* snum */
 *(p + offset++) = 1; /* stype */
 *((uint16_t *) (p + offset)) = htons(trid);
 offset += 2;
 *(p + offset++) = 0;
 *(p + offset++) = (cmd == GATE_DEL) ? PKTCCOPS_SCOMMAND_GATE_DELETE : (cmd != GATE_INFO) ? PKTCCOPS_SCOMMAND_GATE_SET : PKTCCOPS_SCOMMAND_GATE_INFO; /* 4: GATE-SET, 7: GATE-INFO */

 /*Subscriper Identifier 8 octets */
 *(p + offset++) = 0;
 *(p + offset++) = 8; /* length */
 *(p + offset++) = 2; /* snum */
 *(p + offset++) = 1; /* stype */
 *((uint32_t *) (p + offset)) = htonl(mtahost);
 offset += 4;

 if (cmd == GATE_INFO || cmd == GATE_SET_HAVE_GATEID || cmd == GATE_DEL) {
 /* Gate ID 8 Octets */
 *(p + offset++) = 0;
 *(p + offset++) = 8; /* length */
 *(p + offset++) = 3; /* snum */
 *(p + offset++) = 1; /* stype */
 *((uint32_t *) (p + offset)) = htonl(gateid);
 offset += 4;
 if (cmd == GATE_INFO || cmd == GATE_DEL) {
 return offset;
 }

 }

 /* Activity Count 8 octets */
 *(p + offset++) = 0;
 *(p + offset++) = 8; /* length */
 *(p + offset++) = 4; /* snum */
 *(p + offset++) = 1; /* stype */
 *((uint32_t *) (p + offset)) = htonl(actcount);
 offset += 4;


 /* Gate Spec 2*60 Octets */
 gs.direction = 0; /* DS */
 gs.protocolid = 17; /* UDP */
 gs.flags = 0;
 gs.sessionclass = 1;
 gs.srcip = htonl(ssip);
 gs.dstip = htonl(mtahost);
 gs.srcp = htons(ssport);
 gs.dstp = 0;
/* gs.diffserv = 0xa0;*/
 gs.diffserv = 0;
 gs.t1 = htons(cmts->t1);
 gs.t7 = htons(cmts->t7);
 gs.t8 = htons(cmts->t8);
 gs.r = ftoieeef(rate);
 gs.b = ftoieeef(psizegateid);
 gs.p = ftoieeef(rate);
 gs.m = htonl((uint32_t) psizegateid);
 gs.mm = htonl((uint32_t) psizegateid);
 gs.rate = ftoieeef(rate);
 gs.s = htonl(800);


 *(p + offset) = 0;
 offset++;
 *(p + offset) = 60; /* length */
 offset++;
 *(p + offset) = 5; /* snum */
 offset++;
 *(p + offset) = 1; /* stype */
 offset++;
 offset += cops_constructgatespec(&gs, p + offset);


 gs.direction = 1; /* US */
 gs.srcip = htonl(mtahost);
 gs.dstip = htonl(ssip);
 gs.srcp = 0;
 gs.dstp = htons(ssport);
 *(p + offset) = 0;
 offset++;
 *(p + offset) = 60; /* length */
 offset++;
 *(p + offset) = 5; /* snum */
 offset++;
 *(p + offset) = 1; /* stype */
 offset++;
 offset += cops_constructgatespec(&gs, p + offset);

 return(offset);
}

static int cops_getmsg (int sfd, struct copsmsg *recmsg)
{
 int len, lent;
 char buf[COPS_HEADER_SIZE];
 struct pktcobj *pobject = NULL;
 uint16_t *ubuf = (uint16_t *) buf;
 recmsg->msg = NULL;
 recmsg->object = NULL;
 len = recv(sfd, buf, COPS_HEADER_SIZE, MSG_DONTWAIT);
 if (len < COPS_HEADER_SIZE) {
 return len;
 }
 recmsg->verflag = *buf;
 recmsg->opcode = *(buf + 1);
 recmsg->clienttype = ntohs(*((uint16_t *) (buf + 2)));
 recmsg->length = ntohl(*((uint32_t *) (buf + 4)));
 /* Eg KA msg*/
 if (recmsg->clienttype != 0x8008 ) {
 if (!(recmsg->msg = ast_malloc(recmsg->length - COPS_HEADER_SIZE))) {
 return -1;
 }
 lent = recv(sfd, recmsg->msg, recmsg->length - COPS_HEADER_SIZE, MSG_DONTWAIT);
 if (lent < recmsg->length - COPS_HEADER_SIZE) {
 return lent;
 }
 len += len;
 } else {
 /* PacketCable Objects */
 while (len < recmsg->length) {
 if (len == COPS_HEADER_SIZE) {
 /* 1st round */
 if (!(recmsg->object = ast_malloc(sizeof(struct pktcobj)))) {
 return -1;
 }
 pobject = recmsg->object;
 } else {
 if (!(pobject->next = ast_malloc(sizeof(struct pktcobj)))) {
 return -1;
 }
 pobject = pobject->next;
 }
 pobject->next = NULL;
 lent = recv(sfd, buf, COPS_OBJECT_HEADER_SIZE, MSG_DONTWAIT);
 if (lent < COPS_OBJECT_HEADER_SIZE) {
 ast_debug(3, "Too short object header len: %i\n", lent);
 return lent;
 }
 len += lent;
 pobject->length = ntohs(*ubuf);
 pobject->cnum = *(buf + 2);
 pobject->ctype = *(buf + 3);
 if (!(pobject->contents = ast_malloc(pobject->length - COPS_OBJECT_HEADER_SIZE))) {
 return -1;
 }
 lent = recv(sfd, pobject->contents, pobject->length - COPS_OBJECT_HEADER_SIZE, MSG_DONTWAIT);
 if (lent < pobject->length - COPS_OBJECT_HEADER_SIZE) {
 ast_debug(3, "Too short object content len: %i\n", lent);
 return lent;
 }
 len += lent;
 }
 }
 return len;
}

static int cops_sendmsg (int sfd, struct copsmsg * sendmsg)
{
 char *buf;
 int bufpos;
 struct pktcobj *pobject;

 if (sfd < 0) {
 return -1;
 }

 ast_debug(3, "COPS: sending opcode: %i len: %u\n", sendmsg->opcode, sendmsg->length);
 if (sendmsg->length < COPS_HEADER_SIZE) {
 ast_log(LOG_WARNING, "COPS: invalid msg size!!!\n");
 return -1;
 }
 if (!(buf = ast_malloc((size_t) sendmsg->length))) {
 return -1;
 }
 *buf = sendmsg->verflag ;
 *(buf + 1) = sendmsg->opcode;
 *((uint16_t *)(buf + 2)) = htons(sendmsg->clienttype);
 *((uint32_t *)(buf + 4)) = htonl(sendmsg->length);

 if (sendmsg->msg != NULL) {
 memcpy(buf + COPS_HEADER_SIZE, sendmsg->msg, sendmsg->length - COPS_HEADER_SIZE);
 } else if (sendmsg->object != NULL) {
 bufpos = 8;
 pobject = sendmsg->object;
 while(pobject != NULL) {
 ast_debug(3, "COPS: Sending Object : cnum: %i ctype %i len: %i\n", pobject->cnum, pobject->ctype, pobject->length);
 if (sendmsg->length < bufpos + pobject->length) {
 ast_log(LOG_WARNING, "COPS: Invalid msg size len: %u objectlen: %i\n", sendmsg->length, pobject->length);
 ast_free(buf);
 return -1;
 }
 *(uint16_t *) (buf + bufpos) = htons(pobject->length);
 *(buf + bufpos + 2) = pobject->cnum;
 *(buf + bufpos + 3) = pobject->ctype;
 if (sendmsg->length < pobject->length + bufpos) {
 ast_log(LOG_WARNING, "COPS: Error sum of object len more the msg len %u < %i\n", sendmsg->length, pobject->length + bufpos);
 ast_free(buf);
 return -1;
 }
 memcpy((buf + bufpos + 4), pobject->contents, pobject->length - 4);
 bufpos += pobject->length;
 pobject = pobject->next;
 }
 }

 errno = 0;
#ifdef HAVE_MSG_NOSIGNAL
#define SENDFLAGS MSG_NOSIGNAL | MSG_DONTWAIT
#else
#define SENDFLAGS MSG_DONTWAIT
#endif
 if (send(sfd, buf, sendmsg->length, SENDFLAGS) == -1) {
 ast_log(LOG_WARNING, "COPS: Send failed errno=%i\n", errno);
 ast_free(buf);
 return -2;
 }
#undef SENDFLAGS
 ast_free(buf);
 return 0;
}

static void cops_freemsg(struct copsmsg *p)
{
 struct pktcobj *pnext;
 ast_free(p->msg);
 p->msg = NULL;
 while (p->object != NULL) {
 pnext = p->object->next;
 ast_free(p->object->contents);
 p->object->contents = NULL;
 ast_free(p->object);
 p->object = pnext;
 }
 p->object = NULL;
}

struct cops_gate * AST_OPTIONAL_API_NAME(ast_pktccops_gate_alloc)(int cmd,
 struct cops_gate *gate, uint32_t mta, uint32_t actcount, float bitrate,
 uint32_t psize, uint32_t ssip, uint16_t ssport,
 int (* const got_dq_gi) (struct cops_gate *gate),
 int (* const gate_remove) (struct cops_gate *gate))
{
 while (pktcreload) {
 sched_yield();
 }

 if (cmd == GATE_SET_HAVE_GATEID && gate) {
 ast_debug(3, "------- gate modify gateid 0x%x ssip: 0x%x\n", gate->gateid, ssip);
 /* TODO implement it */
 ast_log(LOG_WARNING, "Modify GateID not implemented\n");
 }

 if ((gate = cops_gate_cmd(cmd, NULL, cops_trid++, mta, actcount, bitrate, psize, ssip, ssport, gate))) {
 ast_debug(3, "COPS: Allocating gate for mta: 0x%x\n", mta);
 gate->got_dq_gi = got_dq_gi;
 gate->gate_remove = gate_remove;
 return(gate);
 } else {
 ast_debug(3, "COPS: Couldn't allocate gate for mta: 0x%x\n", mta);
 return NULL;
 }
}

static struct cops_gate *cops_gate_cmd(int cmd, struct cops_cmts *cmts,
 uint16_t trid, uint32_t mta, uint32_t actcount, float bitrate,
 uint32_t psize, uint32_t ssip, uint16_t ssport, struct cops_gate *gate)
{
 struct copsmsg *gateset;
 struct cops_gate *new;
 struct cops_ippool *ippool;

 if (cmd == GATE_DEL) {
 if (gate == NULL) {
 return NULL;
 } else {
 cmts = gate->cmts;
 }
 }

 if (!cmts) {
 AST_LIST_LOCK(&ippool_list);
 AST_LIST_TRAVERSE(&ippool_list, ippool, list) {
 if (mta >= ippool->start && mta <= ippool->stop) {
 cmts = ippool->cmts;
 break;
 }
 }
 AST_LIST_UNLOCK(&ippool_list);
 if (!cmts) {
 ast_log(LOG_WARNING, "COPS: couldn't find cmts for mta: 0x%x\n", mta);
 return NULL;
 }
 if (cmts->sfd < 0) {
 ast_log(LOG_WARNING, "CMTS: %s not connected\n", cmts->name);
 return NULL;
 }
 }

 if (cmd == GATE_SET) {
 new = ast_calloc(1, sizeof(*new));
 new->gateid = 0;
 new->trid = trid;
 new->mta = mta;
 new->state = GATE_ALLOC_PROGRESS;
 new->checked = time(NULL);
 new->allocated = time(NULL);
 new->cmts = cmts;
 new->got_dq_gi = NULL;
 new->gate_remove = NULL;
 new->gate_open = NULL;
 new->tech_pvt = NULL;
 new->deltimer = 0;
 AST_LIST_LOCK(&gate_list);
 AST_LIST_INSERT_HEAD(&gate_list, new, list);
 AST_LIST_UNLOCK(&gate_list);
 gate = new;
 } else {
 if (gate) {
 gate->trid = trid;
 }
 }

 gate->in_transaction = time(NULL);

 if (!(gateset = ast_malloc(sizeof(struct copsmsg)))) {
 ast_free(gateset);
 return NULL;
 }
 gateset->msg = NULL;
 gateset->verflag = 0x10;
 gateset->opcode = 2; /* Decision */
 gateset->clienttype = 0x8008; /* =PacketCable */

 /* Handle object */
 gateset->object = ast_malloc(sizeof(struct pktcobj));
 if (!gateset->object) {
 cops_freemsg(gateset);
 ast_free(gateset);
 return NULL;
 }
 gateset->object->length = COPS_OBJECT_HEADER_SIZE + 4;
 gateset->object->cnum = 1; /* Handle */
 gateset->object->ctype = 1; /* client */
 if (!(gateset->object->contents = ast_malloc(sizeof(uint32_t)))) {
 cops_freemsg(gateset);
 ast_free(gateset);
 return NULL;
 }
 *((uint32_t *) gateset->object->contents) = htonl(cmts->handle);

 /* Context Object */
 if (!(gateset->object->next = ast_malloc(sizeof(struct pktcobj)))) {
 cops_freemsg(gateset);
 ast_free(gateset);
 return NULL;
 }
 gateset->object->next->length = COPS_OBJECT_HEADER_SIZE + 4;
 gateset->object->next->cnum = 2; /* Context */
 gateset->object->next->ctype = 1; /* Context */
 if (!(gateset->object->next->contents = ast_malloc(sizeof(uint32_t)))) {
 cops_freemsg(gateset);
 ast_free(gateset);
 return NULL;
 }
 *((uint32_t *) gateset->object->next->contents) = htonl(0x00080000); /* R-Type = 8 configuration request, M-Type = 0 */

 /* Decision Object: Flags */
 if (!(gateset->object->next->next = ast_malloc(sizeof(struct pktcobj)))) {
 cops_freemsg(gateset);
 ast_free(gateset);
 return NULL;
 }
 gateset->object->next->next->length = COPS_OBJECT_HEADER_SIZE + 4;
 gateset->object->next->next->cnum = 6; /* Decision */
 gateset->object->next->next->ctype = 1; /* Flags */
 if (!(gateset->object->next->next->contents = ast_malloc(sizeof(uint32_t)))) {
 cops_freemsg(gateset);
 ast_free(gateset);
 return NULL;
 }
 *((uint32_t *) gateset->object->next->next->contents) = htonl(0x00010001); /* Install, Trigger Error */

 /* Decision Object: Data */
 if (!(gateset->object->next->next->next = ast_malloc(sizeof(struct pktcobj)))) {
 cops_freemsg(gateset);
 ast_free(gateset);
 return NULL;
 }
 gateset->object->next->next->next->length = COPS_OBJECT_HEADER_SIZE + ((cmd != GATE_INFO && cmd != GATE_DEL) ? GATE_SET_OBJ_SIZE : GATE_INFO_OBJ_SIZE) + ((cmd == GATE_SET_HAVE_GATEID) ? GATEID_OBJ_SIZE : 0);
 gateset->object->next->next->next->cnum = 6; /* Decision */
 gateset->object->next->next->next->ctype = 4; /* Decision Data */
 gateset->object->next->next->next->contents = ast_malloc(((cmd != GATE_INFO && cmd != GATE_DEL) ? GATE_SET_OBJ_SIZE : GATE_INFO_OBJ_SIZE) + ((cmd == GATE_SET_HAVE_GATEID) ? GATEID_OBJ_SIZE : 0));
 if (!gateset->object->next->next->next->contents) {
 cops_freemsg(gateset);
 ast_free(gateset);
 return NULL;
 }
 gateset->object->next->next->next->next = NULL;

 gateset->length = COPS_HEADER_SIZE + gateset->object->length + gateset->object->next->length + gateset->object->next->next->length + gateset->object->next->next->next->length;

 if ((cmd == GATE_INFO || cmd == GATE_SET_HAVE_GATEID || cmd == GATE_DEL) && gate) {
 ast_debug(1, "Construct gate with gateid: 0x%x\n", gate->gateid);
 cops_construct_gate(cmd, gateset->object->next->next->next->contents, trid, mta, actcount, bitrate, psize, ssip, ssport, gate->gateid, cmts);
 } else {
 ast_debug(1, "Construct new gate\n");
 cops_construct_gate(cmd, gateset->object->next->next->next->contents, trid, mta, actcount, bitrate, psize, ssip, ssport, 0, cmts);
 }
 if (pktccopsdebug) {
 ast_debug(3, "send cmd\n");
 }
 cops_sendmsg(cmts->sfd, gateset);
 cops_freemsg(gateset);
 ast_free(gateset);
 return gate;
}

static int cops_connect(char *host, char *port)
{
 int s, sfd = -1;
 struct addrinfo hints;
 struct addrinfo *rp;
 struct addrinfo *result;
#ifdef HAVE_SO_NOSIGPIPE
 int trueval = 1;
#endif

 memset(&hints, 0, sizeof(struct addrinfo));

 hints.ai_family = AF_UNSPEC;
 hints.ai_socktype = SOCK_STREAM;
 hints.ai_flags = 0;
 hints.ai_protocol = 0;

 s = getaddrinfo(host, port, &hints, &result);
 if (s != 0) {
 ast_log(LOG_WARNING, "COPS: getaddrinfo: %s\n", gai_strerror(s));
 return -1;
 }

 for (rp = result; rp != NULL; rp = rp->ai_next) {
 sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
 if (sfd == -1) {
 ast_log(LOG_WARNING, "Failed socket\n");
 }
 ast_fd_set_flags(sfd, O_NONBLOCK);
#ifdef HAVE_SO_NOSIGPIPE
 setsockopt(sfd, SOL_SOCKET, SO_NOSIGPIPE, &trueval, sizeof(trueval));
#endif
 connect(sfd, rp->ai_addr, rp->ai_addrlen);
 if (sfd == -1) {
 ast_log(LOG_WARNING, "Failed connect\n");
 }
 }
 freeaddrinfo(result);

 ast_debug(3, "Connecting to cmts: %s:%s\n", host, port);
 return(sfd);
}

#define PKTCCOPS_DESTROY_CURRENT_GATE \
 AST_LIST_REMOVE_CURRENT(list); \
 if (gate->gate_remove) { \
 gate->gate_remove(gate); \
 } \
 ast_free(gate);

static void *do_pktccops(void *data)
{
 int res, nfds, len;
 struct copsmsg *recmsg, *sendmsg;
 struct copsmsg recmsgb, sendmsgb;
 struct pollfd *pfds = NULL, *tmp;
 struct pktcobj *pobject;
 struct cops_cmts *cmts;
 struct cops_gate *gate;
 char *sobjp;
 uint16_t snst, sobjlen, scommand, recvtrid, actcount, reason, subreason;
 uint32_t gateid, subscrid, pktcerror;
 time_t last_exec = 0;

 recmsg = &recmsgb;
 sendmsg = &sendmsgb;

 ast_debug(3, "COPS: thread started\n");

 for (;;) {
 ast_free(pfds);
 pfds = NULL;
 nfds = 0;
 AST_LIST_LOCK(&cmts_list);
 AST_LIST_TRAVERSE(&cmts_list, cmts, list) {
 if (last_exec != time(NULL)) {
 if (cmts->state == 2 && cmts->katimer + cmts->keepalive < time(NULL)) {
 ast_log(LOG_WARNING, "KA timer (%us) expired cmts: %s\n", cmts->keepalive, cmts->name);
 cmts->state = 0;
 cmts->katimer = -1;
 close(cmts->sfd);
 cmts->sfd = -1;
 }
 }
 if (cmts->sfd > 0) {
 if (!(tmp = ast_realloc(pfds, (nfds + 1) * sizeof(*pfds)))) {
 continue;
 }
 pfds = tmp;
 pfds[nfds].fd = cmts->sfd;
 pfds[nfds].events = POLLIN;
 pfds[nfds].revents = 0;
 nfds++;
 } else {
 cmts->sfd = cops_connect(cmts->host, cmts->port);
 if (cmts->sfd > 0) {
 cmts->state = 1;
 if (cmts->sfd > 0) {
 if (!(tmp = ast_realloc(pfds, (nfds + 1) * sizeof(*pfds)))) {
 continue;
 }
 pfds = tmp;
 pfds[nfds].fd = cmts->sfd;
 pfds[nfds].events = POLLIN;
 pfds[nfds].revents = 0;
 nfds++;
 }
 }
 }
 }
 AST_LIST_UNLOCK(&cmts_list);

 if (last_exec != time(NULL)) {
 last_exec = time(NULL);
 AST_LIST_LOCK(&gate_list);
 AST_LIST_TRAVERSE_SAFE_BEGIN(&gate_list, gate, list) {
 if (gate) {
 if (gate->deltimer && gate->deltimer < time(NULL)) {
 gate->deltimer = time(NULL) + 5;
 gate->trid = cops_trid++;
 cops_gate_cmd(GATE_DEL, gate->cmts, gate->trid, 0, 0, 0, 0, 0, 0, gate);
 ast_debug(3, "COPS: requested Gate-Del: CMTS: %s gateid: 0x%x\n", (gate->cmts) ? gate->cmts->name : "null", gate->gateid);
 }
 if (time(NULL) - gate->checked > gatetimeout) {
 ast_debug(3, "COPS: remove from list GATE, CMTS: %s gateid: 0x%x\n", (gate->cmts) ? gate->cmts->name : "null", gate->gateid);
 gate->state = GATE_TIMEOUT;
 PKTCCOPS_DESTROY_CURRENT_GATE;
 } else if (time(NULL) - gate->checked > gateinfoperiod && (gate->state == GATE_ALLOCATED || gate->state == GATE_OPEN)) {
 if (gate->cmts && (!gate->in_transaction || ( gate->in_transaction + 5 ) < time(NULL))) {
 gate->trid = cops_trid++;
 ast_debug(3, "COPS: Gate-Info send to CMTS: %s gateid: 0x%x\n", gate->cmts->name, gate->gateid);
 cops_gate_cmd(GATE_INFO, gate->cmts, gate->trid, gate->mta, 0, 0, 0, 0, 0, gate);
 }
 }
 }
 }
 AST_LIST_TRAVERSE_SAFE_END;
 AST_LIST_UNLOCK(&gate_list);
 }

 if (pktcreload == 2) {
 pktcreload = 0;
 }
 if ((res = ast_poll(pfds, nfds, 1000))) {
 AST_LIST_LOCK(&cmts_list);
 AST_LIST_TRAVERSE(&cmts_list, cmts, list) {
 int idx;
 if ((idx = ast_poll_fd_index(pfds, nfds, cmts->sfd)) > -1 && (pfds[idx].revents & POLLIN)) {
 len = cops_getmsg(cmts->sfd, recmsg);
 if (len > 0) {
 ast_debug(3, "COPS: got from %s:\n Header: versflag=0x%02hhx opcode=%i clienttype=0x%04hx msglength=%u\n",
 cmts->name, recmsg->verflag,
 recmsg->opcode, recmsg->clienttype, recmsg->length);
 if (recmsg->object != NULL) {
 pobject = recmsg->object;
 while (pobject != NULL) {
 ast_debug(3, " OBJECT: length=%i cnum=%i ctype=%i\n", pobject->length, pobject->cnum, pobject->ctype);
 if (recmsg->opcode == 1 && pobject->cnum == 1 && pobject->ctype == 1 ) {
 cmts->handle = ntohl(*((uint32_t *) pobject->contents));
 ast_debug(3, " REQ client handle: %u\n", cmts->handle);
 cmts->state = 2;
 cmts->katimer = time(NULL);
 } else if (pobject->cnum == 9 && pobject->ctype == 1) {
 sobjp = pobject->contents;
 subscrid = 0;
 recvtrid = 0;
 scommand = 0;
 pktcerror = 0;
 actcount = 0;
 gateid = 0;
 reason = 0;
 subreason = 0;
 while (sobjp < (pobject->contents + pobject->length - 4)) {
 sobjlen = ntohs(*((uint16_t *) sobjp));
 snst = ntohs(*((uint16_t *) (sobjp + 2)));
 ast_debug(3, " S-Num S-type: 0x%.4x len: %i\n", (unsigned)snst, sobjlen);
 if (snst == 0x0101 ) {
 recvtrid = ntohs(*((uint16_t *) (sobjp + 4)));
 scommand = ntohs(*((uint16_t *) (sobjp + 6)));
 ast_debug(3, " Transaction Identifier command: %i trid %i\n", scommand, recvtrid);
 } else if (snst == 0x0201) {
 subscrid = ntohl(*((uint32_t *) (sobjp + 4)));
 ast_debug(3, " Subscriber ID: 0x%.8x\n", subscrid);
 } else if (snst == 0x0301) {
 gateid = ntohl(*((uint32_t *) (sobjp + 4)));
 ast_debug(3, " Gate ID: 0x%x 0x%.8x\n", gateid, gateid);
 } else if (snst == 0x0401) {
 actcount = ntohs(*((uint16_t *) (sobjp + 6)));
 ast_debug(3, " Activity Count: %i\n", actcount);
 } else if (snst == 0x0901) {
 pktcerror = ntohl(*((uint32_t *) (sobjp + 4)));
 ast_debug(3, " PKTC Error: 0x%.8x\n", pktcerror);
 } else if (snst == 0x0d01) {
 reason = ntohs(*((uint16_t *) (sobjp + 4)));
 subreason = ntohs(*((uint16_t *) (sobjp + 6)));
 ast_debug(3, " Reason: %d Subreason: %d\n", reason, subreason);
 }
 sobjp += sobjlen;
 if (!sobjlen)
 break;
 }
 if (scommand == PKTCCOPS_SCOMMAND_GATE_CLOSE || scommand == PKTCCOPS_SCOMMAND_GATE_OPEN) {
 AST_LIST_LOCK(&gate_list);
 AST_LIST_TRAVERSE_SAFE_BEGIN(&gate_list, gate, list) {
 if (gate->cmts == cmts && gate->gateid == gateid) {
 if (scommand == PKTCCOPS_SCOMMAND_GATE_CLOSE && gate->state != GATE_CLOSED && gate->state != GATE_CLOSED_ERR ) {
 ast_debug(3, "COPS Gate Close Gate ID: 0x%x TrId: %i CMTS: %s\n", gateid, recvtrid, cmts->name);
 if (subreason) {
 gate->state = GATE_CLOSED_ERR;
 PKTCCOPS_DESTROY_CURRENT_GATE;
 } else {
 gate->state = GATE_CLOSED;
 PKTCCOPS_DESTROY_CURRENT_GATE;
 }
 break;
 } else if (scommand == PKTCCOPS_SCOMMAND_GATE_OPEN && gate->state == GATE_ALLOCATED) {
 ast_debug(3, "COPS Gate Open Gate ID: 0x%x TrId: %i CMTS: %s\n", gateid, recvtrid, cmts->name);
 gate->state = GATE_OPEN;
 if (gate->gate_open) {
 ast_debug(3, "Calling GATE-OPEN callback function\n");
 gate->gate_open(gate);
 gate->gate_open = NULL;
 }
 break;
 }
 }
 }
 AST_LIST_TRAVERSE_SAFE_END;
 AST_LIST_UNLOCK(&gate_list);
 } else if (scommand == PKTCCOPS_SCOMMAND_GATE_SET_ACK || scommand == PKTCCOPS_SCOMMAND_GATE_SET_ERR || scommand == PKTCCOPS_SCOMMAND_GATE_INFO_ACK || scommand == PKTCCOPS_SCOMMAND_GATE_INFO_ERR || scommand == PKTCCOPS_SCOMMAND_GATE_DELETE_ACK) {
 AST_LIST_LOCK(&gate_list);
 AST_LIST_TRAVERSE_SAFE_BEGIN(&gate_list, gate, list) {
 if (gate->cmts == cmts && gate->trid == recvtrid) {
 gate->gateid = gateid;
 gate->checked = time(NULL);
 if (scommand == PKTCCOPS_SCOMMAND_GATE_SET_ACK) {
 ast_debug(3, "COPS Gate Set Ack Gate ID: 0x%x TrId: %i CMTS: %s\n", gateid, recvtrid, cmts->name);
 gate->state = GATE_ALLOCATED;
 if (gate->got_dq_gi) {
 gate->got_dq_gi(gate);
 gate->got_dq_gi = NULL;
 }
 } else if (scommand == PKTCCOPS_SCOMMAND_GATE_SET_ERR) {
 ast_debug(3, "COPS Gate Set Error TrId: %i ErrorCode: 0x%.8x CMTS: %s\n ", recvtrid, pktcerror, cmts->name);
 gate->state = GATE_ALLOC_FAILED;
 if (gate->got_dq_gi) {
 gate->got_dq_gi(gate);
 gate->got_dq_gi = NULL;
 }
 PKTCCOPS_DESTROY_CURRENT_GATE;
 } else if (scommand == PKTCCOPS_SCOMMAND_GATE_INFO_ACK) {
 ast_debug(3, "COPS Gate Info Ack Gate ID: 0x%x TrId: %i CMTS: %s\n", gateid, recvtrid, cmts->name);
 } else if (scommand == PKTCCOPS_SCOMMAND_GATE_INFO_ERR) {
 ast_debug(3, "COPS Gate Info Error Gate ID: 0x%x TrId: %i CMTS: %s\n", gateid, recvtrid, cmts->name);
 gate->state = GATE_ALLOC_FAILED;
 PKTCCOPS_DESTROY_CURRENT_GATE;
 } else if (scommand == PKTCCOPS_SCOMMAND_GATE_DELETE_ACK) {
 ast_debug(3, "COPS Gate Deleted Gate ID: 0x%x TrId: %i CMTS: %s\n", gateid, recvtrid, cmts->name);
 gate->state = GATE_DELETED;
 PKTCCOPS_DESTROY_CURRENT_GATE;
 }
 gate->in_transaction = 0;
 break;
 }
 }
 AST_LIST_TRAVERSE_SAFE_END;
 AST_LIST_UNLOCK(&gate_list);
 }
 }
 pobject = pobject->next;
 }
 }

 if (recmsg->opcode == 6 && recmsg->object && recmsg->object->cnum == 11 && recmsg->object->ctype == 1) {
 ast_debug(3, "COPS: Client open %s\n", cmts->name);
 sendmsg->msg = NULL;
 sendmsg->verflag = 0x10;
 sendmsg->opcode = 7; /* Client Accept */
 sendmsg->clienttype = 0x8008; /* =PacketCable */
 sendmsg->length = COPS_HEADER_SIZE + COPS_OBJECT_HEADER_SIZE + 4;
 sendmsg->object = ast_malloc(sizeof(struct pktcobj));
 sendmsg->object->length = 4 + COPS_OBJECT_HEADER_SIZE;
 sendmsg->object->cnum = 10; /* keppalive timer*/
 sendmsg->object->ctype = 1;
 sendmsg->object->contents = ast_malloc(sizeof(uint32_t));
 *((uint32_t *) sendmsg->object->contents) = htonl(cmts->keepalive & 0x0000ffff);
 sendmsg->object->next = NULL;
 cops_sendmsg(cmts->sfd, sendmsg);
 cops_freemsg(sendmsg);
 } else if (recmsg->opcode == 9) {
 ast_debug(3, "COPS: Keepalive Request got echoing back %s\n", cmts->name);
 cops_sendmsg(cmts->sfd, recmsg);
 cmts->state = 2;
 cmts->katimer = time(NULL);
 }
 }
 if (len <= 0) {
 ast_debug(3, "COPS: lost connection to %s\n", cmts->name);
 close(cmts->sfd);
 cmts->sfd = -1;
 cmts->state = 0;
 }
 cops_freemsg(recmsg);
 }
 }
 AST_LIST_UNLOCK(&cmts_list);
 }
 if (pktcreload) {
 ast_debug(3, "Reloading pktccops...\n");
 AST_LIST_LOCK(&gate_list);
 AST_LIST_LOCK(&cmts_list);
 pktccops_unregister_ippools();
 AST_LIST_TRAVERSE(&cmts_list, cmts, list) {
 cmts->need_delete = 1;
 }
 load_pktccops_config();
 AST_LIST_TRAVERSE_SAFE_BEGIN(&cmts_list, cmts, list) {
 if (cmts && cmts->need_delete) {
 AST_LIST_TRAVERSE(&gate_list, gate, list) {
 if (gate->cmts == cmts) {
 ast_debug(3, "Null gate %s\n", gate->cmts->name);
 gate->cmts = NULL;
 }
 gate->in_transaction = 0;
 }
 AST_LIST_UNLOCK(&gate_list);
 ast_debug(3, "removing cmts: %s\n", cmts->name);
 if (cmts->sfd > 0) {
 close(cmts->sfd);
 }
 AST_LIST_REMOVE_CURRENT(list);
 ast_free(cmts);
 }
 }
 AST_LIST_TRAVERSE_SAFE_END;
 AST_LIST_UNLOCK(&cmts_list);
 AST_LIST_UNLOCK(&gate_list);
 pktcreload = 2;
 }
 pthread_testcancel();
 }
 return NULL;
}

static int restart_pktc_thread(void)
{
 if (pktccops_thread == AST_PTHREADT_STOP) {
 return 0;
 }
 if (ast_mutex_lock(&pktccops_lock)) {
 ast_log(LOG_WARNING, "Unable to lock pktccops\n");
 return -1;
 }
 if (pktccops_thread == pthread_self()) {
 ast_mutex_unlock(&pktccops_lock);
 ast_log(LOG_WARNING, "Cannot kill myself\n");
 return -1;
 }
 if (pktccops_thread != AST_PTHREADT_NULL) {
 /* Wake up the thread */
 pthread_kill(pktccops_thread, SIGURG);
 } else {
 /* Start a new monitor */
 if (ast_pthread_create_background(&pktccops_thread, NULL, do_pktccops, NULL) < 0) {
 ast_mutex_unlock(&pktccops_lock);
 ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
 return -1;
 }
 }
 ast_mutex_unlock(&pktccops_lock);
 return 0;
}

static int load_pktccops_config(void)
{
 static char *cfg = "res_pktccops.conf";
 struct ast_config *config;
 struct ast_variable *v;
 struct cops_cmts *cmts;
 struct cops_ippool *new_ippool;
 const char *host, *cat, *port;
 int update;
 int res = 0;
 uint16_t t1_temp, t7_temp, t8_temp;
 uint32_t keepalive_temp;
 unsigned int a,b,c,d,e,f,g,h;
 struct ast_flags config_flags = {0};

 if (!(config = ast_config_load(cfg, config_flags))) {
 ast_log(LOG_WARNING, "Unable to load config file res_pktccops.conf\n");
 return -1;
 }
 for (cat = ast_category_browse(config, NULL); cat; cat = ast_category_browse(config, cat)) {
 if (!strcmp(cat, "general")) {
 for (v = ast_variable_browse(config, cat); v; v = v->next) {
 if (!strcasecmp(v->name, "t1")) {
 t1 = atoi(v->value);
 } else if (!strcasecmp(v->name, "t7")) {
 t7 = atoi(v->value);
 } else if (!strcasecmp(v->name, "t8")) {
 t8 = atoi(v->value);
 } else if (!strcasecmp(v->name, "keepalive")) {
 keepalive = atoi(v->value);
 } else if (!strcasecmp(v->name, "gateinfoperiod")) {
 gateinfoperiod = atoi(v->value);
 } else if (!strcasecmp(v->name, "gatetimeout")) {
 gatetimeout = atoi(v->value);
 } else {
 ast_log(LOG_WARNING, "Unkown option %s in general section of res_ptkccops.conf\n", v->name);
 }
 }
 } else {
 /* Defaults */
 host = NULL;
 port = NULL;
 t1_temp = t1;
 t7_temp = t7;
 t8_temp = t8;
 keepalive_temp = keepalive;

 for (v = ast_variable_browse(config, cat); v; v = v->next) {
 if (!strcasecmp(v->name, "host")) {
 host = v->value;
 } else if (!strcasecmp(v->name, "port")) {
 port = v->value;
 } else if (!strcasecmp(v->name, "t1")) {
 t1_temp = atoi(v->value);
 } else if (!strcasecmp(v->name, "t7")) {
 t7_temp = atoi(v->value);
 } else if (!strcasecmp(v->name, "t8")) {
 t8_temp = atoi(v->value);
 } else if (!strcasecmp(v->name, "keepalive")) {
 keepalive_temp = atoi(v->value);
 } else if (!strcasecmp(v->name, "pool")) {
 /* we weill parse it in 2nd round */
 } else {
 ast_log(LOG_WARNING, "Unkown option %s in res_ptkccops.conf\n", v->name);
 }
 }

 update = 0;
 AST_LIST_TRAVERSE(&cmts_list, cmts, list) {
 if (!strcmp(cmts->name, cat)) {
 update = 1;
 break;
 }

 }
 if (!update) {
 cmts = ast_calloc(1, sizeof(*cmts));
 if (!cmts) {
 res = -1;
 break;
 }
 AST_LIST_INSERT_HEAD(&cmts_list, cmts, list);
 }
 if (cat) {
 ast_copy_string(cmts->name, cat, sizeof(cmts->name));
 }
 if (host) {
 ast_copy_string(cmts->host, host, sizeof(cmts->host));
 }
 if (port) {
 ast_copy_string(cmts->port, port, sizeof(cmts->port));
 } else {
 ast_copy_string(cmts->port, DEFAULT_COPS_PORT, sizeof(cmts->port));
 }

 cmts->t1 = t1_temp;
 cmts->t7 = t7_temp;
 cmts->t8 = t8_temp;
 cmts->keepalive = keepalive_temp;
 if (!update) {
 cmts->state = 0;
 cmts->sfd = -1;
 }
 cmts->need_delete = 0;
 for (v = ast_variable_browse(config, cat); v; v = v->next) {
 /* parse ipppol when we have cmts ptr */
 if (!strcasecmp(v->name, "pool")) {
 if (sscanf(v->value, "%3u.%3u.%3u.%3u %3u.%3u.%3u.%3u", &a, &b, &c, &d, &e, &f, &g, &h) == 8) {
 new_ippool = ast_calloc(1, sizeof(*new_ippool));
 if (!new_ippool) {
 res = -1;
 break;
 }
 new_ippool->start = a << 24 | b << 16 | c << 8 | d;
 new_ippool->stop = e << 24 | f << 16 | g << 8 | h;
 new_ippool->cmts = cmts;
 pktccops_add_ippool(new_ippool);
 } else {
 ast_log(LOG_WARNING, "Invalid ip pool format in res_pktccops.conf\n");
 }
 }
 }
 }
 }
 ast_config_destroy(config);
 return res;
}

static char *pktccops_show_cmtses(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 struct cops_cmts *cmts;
 char statedesc[16];
 int katimer;

 switch(cmd) {
 case CLI_INIT:
 e->command = "pktccops show cmtses";
 e->usage =
 "Usage: pktccops show cmtses\n"
 " List PacketCable COPS CMTSes.\n";

 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

 ast_cli(a->fd, "%-16s %-24s %-12s %7s\n", "Name ", "Host ", "Status ", "KA timer ");
 ast_cli(a->fd, "%-16s %-24s %-12s %7s\n", "------------", "--------------------", "----------", "-----------");
 AST_LIST_LOCK(&cmts_list);
 AST_LIST_TRAVERSE(&cmts_list, cmts, list) {
 katimer = -1;
 if (cmts->state == 2) {
 ast_copy_string(statedesc, "Connected", sizeof(statedesc));
 katimer = (int) (time(NULL) - cmts->katimer);
 } else if (cmts->state == 1) {
 ast_copy_string(statedesc, "Connecting", sizeof(statedesc));
 } else {
 ast_copy_string(statedesc, "N/A", sizeof(statedesc));
 }
 ast_cli(a->fd, "%-16s %-15s:%-8s %-12s %-7d\n", cmts->name, cmts->host, cmts->port, statedesc, katimer);
 }
 AST_LIST_UNLOCK(&cmts_list);
 return CLI_SUCCESS;
}

static char *pktccops_show_gates(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 struct cops_gate *gate;
 char state_desc[16];

 switch(cmd) {
 case CLI_INIT:
 e->command = "pktccops show gates";
 e->usage =
 "Usage: pktccops show gates\n"
 " List PacketCable COPS GATEs.\n";

 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

 ast_cli(a->fd, "%-16s %-12s %-12s %-10s %-10s %-10s\n" ,"CMTS", "Gate-Id","MTA", "Status", "AllocTime", "CheckTime");
 ast_cli(a->fd, "%-16s %-12s %-12s %-10s %-10s %-10s\n" ,"--------------" ,"----------", "----------", "--------", "--------", "--------\n");
 AST_LIST_LOCK(&cmts_list);
 AST_LIST_LOCK(&gate_list);
 AST_LIST_TRAVERSE(&gate_list, gate, list) {
 if (gate->state == GATE_ALLOC_FAILED) {
 ast_copy_string(state_desc, "Failed", sizeof(state_desc));
 } else if (gate->state == GATE_ALLOC_PROGRESS) {
 ast_copy_string(state_desc, "In Progress", sizeof(state_desc));
 } else if (gate->state == GATE_ALLOCATED) {
 ast_copy_string(state_desc, "Allocated", sizeof(state_desc));
 } else if (gate->state == GATE_CLOSED) {
 ast_copy_string(state_desc, "Closed", sizeof(state_desc));
 } else if (gate->state == GATE_CLOSED_ERR) {
 ast_copy_string(state_desc, "ClosedErr", sizeof(state_desc));
 } else if (gate->state == GATE_OPEN) {
 ast_copy_string(state_desc, "Open", sizeof(state_desc));
 } else if (gate->state == GATE_DELETED) {
 ast_copy_string(state_desc, "Deleted", sizeof(state_desc));
 } else {
 ast_copy_string(state_desc, "N/A", sizeof(state_desc));
 }

 ast_cli(a->fd, "%-16s 0x%.8x 0x%08x %-10s %10i %10i %u\n", (gate->cmts) ? gate->cmts->name : "null" , gate->gateid, gate->mta,
 state_desc, (int) (time(NULL) - gate->allocated), (gate->checked) ? (int) (time(NULL) - gate->checked) : 0, (unsigned int) gate->in_transaction);
 }
 AST_LIST_UNLOCK(&cmts_list);
 AST_LIST_UNLOCK(&gate_list);
 return CLI_SUCCESS;
}

static char *pktccops_show_pools(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 struct cops_ippool *ippool;
 char start[32];
 char stop[32];

 switch(cmd) {
 case CLI_INIT:
 e->command = "pktccops show pools";
 e->usage =
 "Usage: pktccops show pools\n"
 " List PacketCable COPS ip pools of MTAs.\n";

 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

 ast_cli(a->fd, "%-16s %-18s %-7s\n", "Start ", "Stop ", "CMTS ");
 ast_cli(a->fd, "%-16s %-18s %-7s\n", "----------", "----------", "--------");
 AST_LIST_LOCK(&ippool_list);
 AST_LIST_TRAVERSE(&ippool_list, ippool, list) {
 snprintf(start, sizeof(start), "%3u.%3u.%3u.%3u", ippool->start >> 24, (ippool->start >> 16) & 0x000000ff, (ippool->start >> 8) & 0x000000ff, ippool->start & 0x000000ff);

 snprintf(stop, sizeof(stop), "%3u.%3u.%3u.%3u", ippool->stop >> 24, (ippool->stop >> 16) & 0x000000ff, (ippool->stop >> 8) & 0x000000ff, ippool->stop & 0x000000ff);
 ast_cli(a->fd, "%-16s %-18s %-16s\n", start, stop, ippool->cmts->name);
 }
 AST_LIST_UNLOCK(&ippool_list);
 return CLI_SUCCESS;
}

static char *pktccops_gatedel(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 int found = 0;
 int trid;
 uint32_t gateid;
 struct cops_gate *gate;
 struct cops_cmts *cmts;

 switch (cmd) {
 case CLI_INIT:
 e->command = "pktccops gatedel";
 e->usage =
 "Usage: pktccops gatedel <cmts> <gateid>\n"
 " Send Gate-Del to cmts.\n";
 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

 if (a->argc < 4)
 return CLI_SHOWUSAGE;

 AST_LIST_LOCK(&cmts_list);
 AST_LIST_TRAVERSE(&cmts_list, cmts, list) {
 if (!strcmp(cmts->name, a->argv[2])) {
 ast_cli(a->fd, "Found cmts: %s\n", cmts->name);
 found = 1;
 break;
 }
 }
 AST_LIST_UNLOCK(&cmts_list);

 if (!found)
 return CLI_SHOWUSAGE;

 trid = cops_trid++;
 if (!sscanf(a->argv[3], "%x", &gateid)) {
 ast_cli(a->fd, "bad gate specification (%s)\n", a->argv[3]);
 return CLI_SHOWUSAGE;
 }

 found = 0;
 AST_LIST_LOCK(&gate_list);
 AST_LIST_TRAVERSE(&gate_list, gate, list) {
 if (gate->gateid == gateid && gate->cmts == cmts) {
 found = 1;
 break;
 }
 }

 if (!found) {
 ast_cli(a->fd, "gate not found: %s\n", a->argv[3]);
 return CLI_SHOWUSAGE;
 }

 AST_LIST_UNLOCK(&gate_list);
 cops_gate_cmd(GATE_DEL, cmts, trid, 0, 0, 0, 0, 0, 0, gate);
 return CLI_SUCCESS;
}

static char *pktccops_gateset(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 int foundcmts = 0;
 int trid;
 unsigned int an,bn,cn,dn;
 uint32_t mta, ssip;
 struct cops_cmts *cmts;

 switch (cmd) {
 case CLI_INIT:
 e->command = "pktccops gateset";
 e->usage =
 "Usage: pktccops gateset <cmts> <mta> <acctcount> <bitrate> <packet size> <switch ip> <switch port>\n"
 " Send Gate-Set to cmts.\n";
 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

 if (a->argc < 9)
 return CLI_SHOWUSAGE;

 if (!strcmp(a->argv[2], "null")) {
 cmts = NULL;
 } else {
 AST_LIST_LOCK(&cmts_list);
 AST_LIST_TRAVERSE(&cmts_list, cmts, list) {
 if (!strcmp(cmts->name, a->argv[2])) {
 ast_cli(a->fd, "Found cmts: %s\n", cmts->name);
 foundcmts = 1;
 break;
 }
 }
 AST_LIST_UNLOCK(&cmts_list);
 if (!foundcmts) {
 ast_cli(a->fd, "CMTS not found: %s\n", a->argv[2]);
 return CLI_SHOWUSAGE;
 }
 }

 trid = cops_trid++;
 if (sscanf(a->argv[3], "%3u.%3u.%3u.%3u", &an, &bn, &cn, &dn) != 4) {
 ast_cli(a->fd, "MTA specification (%s) does not look like an ipaddr\n", a->argv[3]);
 return CLI_SHOWUSAGE;
 }
 mta = an << 24 | bn << 16 | cn << 8 | dn;

 if (sscanf(a->argv[7], "%3u.%3u.%3u.%3u", &an, &bn, &cn, &dn) != 4) {
 ast_cli(a->fd, "SSIP specification (%s) does not look like an ipaddr\n", a->argv[7]);
 return CLI_SHOWUSAGE;
 }
 ssip = an << 24 | bn << 16 | cn << 8 | dn;

 cops_gate_cmd(GATE_SET, cmts, trid, mta, atoi(a->argv[4]), atof(a->argv[5]), atoi(a->argv[6]), ssip, atoi(a->argv[8]), NULL);
 return CLI_SUCCESS;
}

static char *pktccops_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 switch (cmd) {
 case CLI_INIT:
 e->command = "pktccops set debug {on|off}";
 e->usage =
 "Usage: pktccops set debug {on|off}\n"
 " Turn on/off debuging\n";
 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

 if (a->argc != e->args)
 return CLI_SHOWUSAGE;
 if (!strncasecmp(a->argv[e->args - 1], "on", 2)) {
 pktccopsdebug = 1;
 ast_cli(a->fd, "PktcCOPS Debugging Enabled\n");
 } else if (!strncasecmp(a->argv[e->args - 1], "off", 2)) {
 pktccopsdebug = 0;
 ast_cli(a->fd, "PktcCOPS Debugging Disabled\n");
 } else {
 return CLI_SHOWUSAGE;
 }
 return CLI_SUCCESS;

}

static struct ast_cli_entry cli_pktccops[] = {
 AST_CLI_DEFINE(pktccops_show_cmtses, "List PacketCable COPS CMTSes"),
 AST_CLI_DEFINE(pktccops_show_gates, "List PacketCable COPS GATEs"),
 AST_CLI_DEFINE(pktccops_show_pools, "List PacketCable MTA pools"),
 AST_CLI_DEFINE(pktccops_gateset, "Send Gate-Set to cmts"),
 AST_CLI_DEFINE(pktccops_gatedel, "Send Gate-Det to cmts"),
 AST_CLI_DEFINE(pktccops_debug, "Enable/Disable COPS debugging")
};

static int pktccops_add_ippool(struct cops_ippool *ippool)
{
 if (ippool) {
 AST_LIST_LOCK(&ippool_list);
 AST_LIST_INSERT_HEAD(&ippool_list, ippool, list);
 AST_LIST_UNLOCK(&ippool_list);
 return 0;
 } else {
 ast_log(LOG_WARNING, "Attempted to register NULL ippool?\n");
 return -1;
 }
}

static void pktccops_unregister_cmtses(void)
{
 struct cops_cmts *cmts;
 struct cops_gate *gate;
 AST_LIST_LOCK(&cmts_list);
 while ((cmts = AST_LIST_REMOVE_HEAD(&cmts_list, list))) {
 if (cmts->sfd > 0) {
 close(cmts->sfd);
 }
 ast_free(cmts);
 }
 AST_LIST_UNLOCK(&cmts_list);

 AST_LIST_LOCK(&gate_list);
 while ((gate = AST_LIST_REMOVE_HEAD(&gate_list, list))) {
 ast_free(gate);
 }
 AST_LIST_UNLOCK(&gate_list);
}

static void pktccops_unregister_ippools(void)
{
 struct cops_ippool *ippool;
 AST_LIST_LOCK(&ippool_list);
 while ((ippool = AST_LIST_REMOVE_HEAD(&ippool_list, list))) {
 ast_free(ippool);
 }
 AST_LIST_UNLOCK(&ippool_list);
}

static int load_module(void)
{
 int res;
 AST_LIST_LOCK(&cmts_list);
 res = load_pktccops_config();
 AST_LIST_UNLOCK(&cmts_list);
 if (res == -1) {
 return AST_MODULE_LOAD_DECLINE;
 }
 ast_cli_register_multiple(cli_pktccops, sizeof(cli_pktccops) / sizeof(struct ast_cli_entry));
 restart_pktc_thread();

 return 0;
}

static int unload_module(void)
{
 if (!ast_mutex_lock(&pktccops_lock)) {
 if ((pktccops_thread != AST_PTHREADT_NULL) && (pktccops_thread != AST_PTHREADT_STOP)) {
 pthread_cancel(pktccops_thread);
 pthread_kill(pktccops_thread, SIGURG);
 pthread_join(pktccops_thread, NULL);
 }
 pktccops_thread = AST_PTHREADT_STOP;
 ast_mutex_unlock(&pktccops_lock);
 } else {
 ast_log(LOG_ERROR, "Unable to lock the pktccops_thread\n");
 return -1;
 }

 ast_cli_unregister_multiple(cli_pktccops, sizeof(cli_pktccops) / sizeof(struct ast_cli_entry));
 pktccops_unregister_cmtses();
 pktccops_unregister_ippools();
 pktccops_thread = AST_PTHREADT_NULL;
 return 0;
}

static int reload_module(void)
{
 /* Prohibit unloading */
 if (pktcreload) {
 ast_log(LOG_NOTICE, "Previous reload in progress, please wait!\n");
 return -1;
 }
 pktcreload = 1;
 return 0;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS, "PktcCOPS manager for MGCP",
 .support_level = AST_MODULE_SUPPORT_EXTENDED,
 .load = load_module,
 .unload = unload_module,
 .reload = reload_module,
);