ul_fifo.c

用来作为linux中SIP SERVER,完成VOIP网络电话中服务器的功能

/*
 * $Id: ul_fifo.c,v 1.33.2.1 2005/03/29 11:54:35 janakj Exp $
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of ser, a free SIP server.
 *
 * ser 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 2 of the License, or
 * (at your option) any later version
 *
 * For a license to use the ser software under conditions
 * other than those described here, or to purchase support for this
 * software, please contact iptel.org by e-mail at the following addresses:
 *    [e-mail]
 *
 * ser 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, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * History:
 * ---------
 * 2003-03-12 added support for replication mark
 */


#include <string.h>
#include <stdio.h>
#include "../../fifo_server.h"
#include "../../dprint.h"
#include "../../ut.h"
#include "../../qvalue.h"
#include "ul_fifo.h"
#include "dlist.h"
#include "udomain.h"
#include "utime.h"
#include "ul_mod.h"

#define MAX_CONTACT_LEN 128
#define MAX_EXPIRES_LEN 20
#define MAX_Q_LEN 20
#define MAX_REPLICATE_LEN 12
#define MAX_FLAGS_LEN 12


/*
 * Dedicated to Douglas Adams, don't panic !
 */
#define FIFO_CALLID "The-Answer-To-The-Ultimate-Question-Of-Life-Universe-And-Everything"
#define FIFO_CALLID_LEN (sizeof(FIFO_CALLID)-1)
#define FIFO_CSEQ 42
#define FIFO_UA "SIP Express Router FIFO"
#define FIFO_UA_LEN 23



static int print_ul_stats(FILE *reply_file)
{
	dlist_t* ptr;
	
	fprintf(reply_file, "Domain Registered Expired\n");
	
	ptr = root;
	while(ptr) {

		fprintf(reply_file, "'%.*s' %d %d\n",
			ptr->d->name->len, ZSW(ptr->d->name->s),
			ptr->d->users,
			ptr->d->expired
			);
		ptr = ptr->next;
	}

	return 1;
}

int static ul_stats_cmd( FILE *pipe, char *response_file )
{
	FILE *reply_file;
	
	reply_file=open_reply_pipe(response_file);
	if (reply_file==0) {
		LOG(L_ERR, "ERROR: ul_stats: file not opened\n");
		return -1;
	}
	fputs( "200 ok\n", reply_file );
	print_ul_stats( reply_file );
	fclose(reply_file);
	return 1;
}


int static ul_dump(FILE* pipe, char* response_file)
{
	FILE* reply_file;

	reply_file=open_reply_pipe(response_file);
	if (reply_file==0) {
		LOG(L_ERR, "ERROR: ul_dump: file not opened\n");
		return -1;
	}
	fputs( "200 ok\n", reply_file);
	print_all_udomains(reply_file);
	fclose(reply_file);
	return 1;
}

int static ul_flush(FILE* pipe, char* response_file)
{
	synchronize_all_udomains();
	fifo_reply(response_file, "200 ul_flush completed" );
	return 1;
}


static inline void fifo_find_domain(str* _name, udomain_t** _d)
{
	dlist_t* ptr;

	ptr = root;
	while(ptr) {
		if ((ptr->name.len == _name->len) &&
		    !memcmp(ptr->name.s, _name->s, _name->len)) {
			break;
		}
		ptr = ptr->next;
	}
	
	if (ptr) {
		*_d = ptr->d;
	} else {
		*_d = 0;
	}
}


static inline int add_contact(udomain_t* _d, str* _u, str* _c, time_t _e, qvalue_t _q, int _f)
{
	urecord_t* r;
	ucontact_t* c = 0;
	int res;
	str cid;
	str ua;
	
	if (_e == 0 && !(_f & FL_PERMANENT)) {
		LOG(L_ERR, "fifo_add_contact(): expires == 0 and not persistent contact, giving up\n");
		return -1;
	}

	get_act_time();

	res = get_urecord(_d, _u, &r);
	if (res < 0) {
		LOG(L_ERR, "fifo_add_contact(): Error while getting record\n");
		return -2;
	}

	if (res >  0) { /* Record not found */
		if (insert_urecord(_d, _u, &r) < 0) {
			LOG(L_ERR, "fifo_add_contact(): Error while creating new urecord\n");
			return -3;
		}
	} else {
		if (get_ucontact(r, _c, &c) < 0) {
			LOG(L_ERR, "fifo_add_contact(): Error while obtaining ucontact\n");
			return -4;
		}
	}
		
	cid.s = FIFO_CALLID;
	cid.len = FIFO_CALLID_LEN;

	ua.s = FIFO_UA;
	ua.len = FIFO_UA_LEN;

	if (c) {
		if (update_ucontact(c, _e + act_time, _q, &cid, FIFO_CSEQ, _f, FL_NONE, &ua, 0) < 0) {
			LOG(L_ERR, "fifo_add_contact(): Error while updating contact\n");
			release_urecord(r);
			return -5;
		}
	} else {
		if (insert_ucontact(r, _c, _e + act_time, _q, &cid, FIFO_CSEQ, _f, &c, &ua, 0) < 0) {
			LOG(L_ERR, "fifo_add_contact(): Error while inserting contact\n");
			release_urecord(r);
			return -6;
		}
	}
	
	release_urecord(r);
	return 0;
}


static int ul_add(FILE* pipe, char* response_file)
{
	char table_s[MAX_TABLE];
	char user_s[MAX_USER];
	char contact_s[MAX_CONTACT_LEN];
	char expires_s[MAX_EXPIRES_LEN];
	char q_s[MAX_Q_LEN];
	char rep_s[MAX_REPLICATE_LEN];
	char flags_s[MAX_FLAGS_LEN];
	udomain_t* d;
	int exp_i, flags_i;
	char* at;
	qvalue_t qval;

	str table, user, contact, expires, q, rep, flags;

	if (!read_line(table_s, MAX_TABLE, pipe, &table.len) || table.len == 0) {
		fifo_reply(response_file,
			   "400 ul_add: table name expected\n");
		LOG(L_ERR, "ERROR: ul_add: table name expected\n");
		return 1;
	}
	
	if (!read_line(user_s, MAX_USER, pipe, &user.len) || user.len  == 0) {
		fifo_reply(response_file,
			   "400 ul_add: aor name expected\n");
		LOG(L_ERR, "ERROR: ul_add: aor expected\n");
		return 1;
	}

	at = memchr(user_s, '@', user.len);

	if (use_domain) {
		if (!at) {
			fifo_reply(response_file,
				   "400 ul_add: username@domain expected\n");
			LOG(L_ERR, "ERROR: ul_add: Domain missing\n");
			return 1;
		}
	} else {
		if (at) {
			user.len = at - user_s;
		}
	}

	if (!read_line(contact_s, MAX_CONTACT_LEN, pipe, &contact.len) || contact.len == 0) {
		fifo_reply(response_file,
			   "400 ul_add: contact expected\n");
		LOG(L_ERR, "ERROR: ul_add: contact expected\n");
		return 1;
	}
	
	if (!read_line(expires_s, MAX_EXPIRES_LEN, pipe, &expires.len) || expires.len == 0) {
		fifo_reply(response_file,
			   "400 ul_add: expires expected\n");
		LOG(L_ERR, "ERROR: ul_add: expires expected\n");
		return 1;
	}
	
	if (!read_line(q_s, MAX_Q, pipe, &q.len) || q.len == 0) {
		fifo_reply(response_file,
			   "400 ul_add: q expected\n");
		LOG(L_ERR, "ERROR: ul_add: q expected\n");
		return 1;
	}

	     /* Kept for backwards compatibility */
	if (!read_line(rep_s, MAX_REPLICATE_LEN, pipe, &rep.len) || rep.len == 0) {
		fifo_reply(response_file,
			   "400 ul_add: replicate expected\n");
		LOG(L_ERR, "ERROR: ul_add: replicate expected\n");
		return 1;
	}

	if (!read_line(flags_s, MAX_FLAGS_LEN, pipe, &flags.len) || flags.len == 0) {
		fifo_reply(response_file,
			   "400 ul_add: flags expected\n");
		LOG(L_ERR, "ERROR: ul_add: flags expected\n");
		return 1;
	}
	
	table.s = table_s;
	user.s = user_s;
	strlower(&user);

	contact.s = contact_s;
	expires.s = expires_s;
	q.s = q_s;
	flags.s = flags_s;
	
	fifo_find_domain(&table, &d);
	
	if (d) {
		if (str2int(&expires, (unsigned int*)&exp_i) < 0) {
			fifo_reply(response_file, "400 Invalid expires format\n");
			return 1;
		}

		if (str2q(&qval, q.s, q.len) < 0) {
			fifo_reply(response_file, "400 Invalid q value\n");
			return 1;
		}

		if (str2int(&flags, (unsigned int*)&flags_i) < 0) {
			fifo_reply(response_file, "400 Invalid flags format\n");
			return 1;
		}
		
		lock_udomain(d);
		
		if (add_contact(d, &user, &contact, exp_i, qval, flags_i) < 0) {
			unlock_udomain(d);
			LOG(L_ERR, "ul_add(): Error while adding contact ('%.*s','%.*s') in table '%.*s'\n",
			    user.len, ZSW(user.s), contact.len, ZSW(contact.s), table.len, ZSW(table.s));
			fifo_reply(response_file, "500 Error while adding contact\n"
				   " ('%.*s','%.*s') in table '%.*s'\n",
				   user.len, ZSW(user.s), contact.len, ZSW(contact.s), table.len, ZSW(table.s));
			return 1;
		}
		unlock_udomain(d);
		
		fifo_reply(response_file, "200 Added to table\n"
				"('%.*s','%.*s') to '%.*s'\n",
			   user.len, ZSW(user.s), contact.len, ZSW(contact.s), table.len, ZSW(table.s));
		return 1;
	} else {
		fifo_reply(response_file, "400 Table '%.*s' not found in memory, use save(\"%.*s\") or lookup(\"%.*s\") in the configuration script first\n", 
			table.len, ZSW(table.s), table.len, ZSW(table.s), table.len, ZSW(table.s));
		return 1;
	}
}