tcp_main.c
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 /*
  * $Id$
  *
  * 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:
  *    info@iptel.org
  *
  * 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
  */
 
 
 #ifdef USE_TCP
 
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 #ifndef SHM_MEM
 #error "shared memory support needed (add -DSHM_MEM to Makefile.defs)"
 #endif
 
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 #include <sys/select.h>
 
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 
 #include <unistd.h>
 
 #include <errno.h>
 #include <string.h>
 
 
 
 #include "ip_addr.h"
 #include "pass_fd.h"
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 #include "tcp_conn.h"
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 #include "globals.h"
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 #include "pt.h"
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 #include "locking.h"
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 #include "mem/mem.h"
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 #include "mem/shm_mem.h"
 #include "timer.h"
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 #include "tcp_server.h"
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 #include "tcp_init.h"
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 #define local_malloc pkg_malloc
 #define local_free   pkg_free
 
 #define MAX_TCP_CHILDREN 100
 
 struct tcp_child{
 	pid_t pid;
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 	int unix_sock; /* unix sock fd, copied from pt*/
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 	int busy;
 	int n_reqs; /* number of requests serviced so far */
 };
 
 
 
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 /* connection hash table (after ip&port) */
 struct tcp_connection** tcpconn_addr_hash=0;
 /* connection hash table (after connection id) */
 struct tcp_connection** tcpconn_id_hash=0;
 lock_t* tcpconn_lock=0;
 
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 struct tcp_child tcp_children[MAX_TCP_CHILDREN];
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 static int connection_id=1; /*  unique for each connection, used for 
 								quickly finding the corresponding connection
 								for a reply */
 int unix_tcp_sock;
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 struct tcp_connection* tcpconn_new(int sock, union sockaddr_union* su,
 									struct socket_info* ba)
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 {
 	struct tcp_connection *c;
 	
 
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 	c=(struct tcp_connection*)shm_malloc(sizeof(struct tcp_connection));
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 	if (c==0){
 		LOG(L_ERR, "ERROR: tcpconn_add: mem. allocation failure\n");
 		goto error;
 	}
 	c->s=sock;
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 	c->fd=-1; /* not initialized */
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 	c->rcv.src_su=*su;
 	
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 	c->refcnt=0;
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 	su2ip_addr(&c->rcv.src_ip, su);
 	c->rcv.src_port=su_getport(su);
 	c->rcv.proto=PROTO_TCP;
 	c->rcv.bind_address=ba;
 	if (ba){
 		c->rcv.dst_ip=ba->address;
 		c->rcv.dst_port=ba->port_no;
 	}
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 	init_tcp_req(&c->req);
 	c->timeout=get_ticks()+TCP_CON_TIMEOUT;
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 	c->id=connection_id++;
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 	c->rcv.proto_reserved1=0; /* this will be filled before receive_message*/
 	c->rcv.proto_reserved2=0;
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 	return c;
 	
 error:
 	return 0;
 }
 
 
 
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 struct tcp_connection* tcpconn_connect(union sockaddr_union* server)
 {
 	int s;
 
 	s=socket(AF2PF(server->s.sa_family), SOCK_STREAM, 0);
 	if (s<0){
 		LOG(L_ERR, "ERROR: tcpconn_connect: socket: (%d) %s\n",
 				errno, strerror(errno));
 		goto error;
 	}
 	if (connect(s, &server->s, sockaddru_len(*server))<0){
 		LOG(L_ERR, "ERROR: tcpconn_connect: connect: (%d) %s\n",
 				errno, strerror(errno));
 		goto error;
 	}
 	return tcpconn_new(s, server, 0); /*FIXME: set sock idx! */
 error:
 	return 0;
 }
 
 
 
 struct tcp_connection*  tcpconn_add(struct tcp_connection *c)
 {
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 	unsigned hash;
 
 	if (c){
 		TCPCONN_LOCK;
 		/* add it at the begining of the list*/
 		hash=tcp_addr_hash(&c->rcv.src_ip, c->rcv.src_port);
 		c->addr_hash=hash;
 		tcpconn_listadd(tcpconn_addr_hash[hash], c, next, prev);
 		hash=tcp_id_hash(c->id);
 		c->id_hash=hash;
 		tcpconn_listadd(tcpconn_id_hash[hash], c, id_next, id_prev);
 		TCPCONN_UNLOCK;
 		DBG("tcpconn_add: hashes: %d, %d\n", c->addr_hash, c->id_hash);
 		return c;
 	}else{
 		LOG(L_CRIT, "tcpconn_add: BUG: null connection pointer\n");
 		return 0;
 	}
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 }
 
 
 
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 void tcpconn_rm(struct tcp_connection* c)
 {
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 	TCPCONN_LOCK;
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 	tcpconn_listrm(tcpconn_addr_hash[c->addr_hash], c, next, prev);
 	tcpconn_listrm(tcpconn_id_hash[c->id_hash], c, id_next, id_prev);
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 	TCPCONN_UNLOCK;
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 	shm_free(c);
 }
 
 
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 /* finds a connection, if id=0 uses the ip addr & port
  * WARNING: unprotected (locks) use tcpconn_get unless you really
  * know what you are doing */
 struct tcp_connection* _tcpconn_find(int id, struct ip_addr* ip, int port)
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 {
 
 	struct tcp_connection *c;
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 	unsigned hash;
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 	DBG("tcpconn_find: %d ",id ); print_ip(ip); DBG(" %d\n", ntohs(port));
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 	if (id){
 		hash=tcp_id_hash(id);
 		for (c=tcpconn_id_hash[hash]; c; c=c->id_next){
 			DBG("c=%p, c->id=%d, ip=",c, c->id);
 			print_ip(&c->rcv.src_ip);
 			DBG(" port=%d\n", ntohs(c->rcv.src_port));
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 			if (id==c->id) return c;
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 		}
 	}else if (ip){
 		hash=tcp_addr_hash(ip, port);
 		for (c=tcpconn_addr_hash[hash]; c; c=c->next){
 			DBG("c=%p, c->id=%d, ip=",c, c->id);
 			print_ip(&c->rcv.src_ip);
 			DBG(" port=%d\n", ntohs(c->rcv.src_port));
 			if ( (port==c->rcv.src_port) && (ip_addr_cmp(ip, &c->rcv.src_ip)) )
 				return c;
 		}
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 	}
 	return 0;
 }
 
 
 
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 /* _tcpconn_find with locks */
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 struct tcp_connection* tcpconn_get(int id, struct ip_addr* ip, int port)
 {
 	struct tcp_connection* c;
 	TCPCONN_LOCK;
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 	c=_tcpconn_find(id, ip, port);
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 	if (c) c->refcnt++;
 	TCPCONN_UNLOCK;
 	return c;
 }
 
 
 
 void tcpconn_put(struct tcp_connection* c)
 {
 	c->refcnt--; /* FIXME: atomic_dec */
 }
 
 
 
 /* finds a tcpconn & sends on it */
 int tcp_send(char* buf, unsigned len, union sockaddr_union* to, int id)
 {
 	struct tcp_connection *c;
 	struct ip_addr ip;
 	int port;
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 	int fd;
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 	long response[2];
 	int n;
 	
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 	port=0;
 	if (to){
 		su2ip_addr(&ip, to);
 		port=su_getport(to);
 		c=tcpconn_get(id, &ip, port); /* lock ;inc refcnt; unlock */
 	}else if (id){
 		c=tcpconn_get(id, 0, 0);
 	}else{
 		LOG(L_CRIT, "BUG: tcp_send called with null id & to\n");
 		return -1;
 	}
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 	if (id){
 		if (c==0) {
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 			if (to){
 				c=tcpconn_get(0, &ip, port); /* try again w/o id */
 				goto no_id;
 			}else{
 				LOG(L_ERR, "ERROR: tcp_send: id %d not found, dropping\n",
 						id);
 				return -1;
 			}
 		}else goto get_fd;
 	}
 no_id:
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 		if (c==0){
 			DBG("tcp_send: no open tcp connection found, opening new one\n");
 			/* create tcp connection */
 			if ((c=tcpconn_connect(to))==0){
 				LOG(L_ERR, "ERROR: tcp_send: connect failed\n");
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 				return -1;
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 			}
 			c->refcnt++;
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 			fd=c->s;
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 			/* send the new tcpconn to "tcp main" */
 			response[0]=(long)c;
 			response[1]=CONN_NEW;
 			n=write(unix_tcp_sock, response, sizeof(response));
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 			if (n<0){
 				LOG(L_ERR, "BUG: tcp_send: failed write: %s (%d)\n",
 						strerror(errno), errno);
 				goto end;
 			}	
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 			n=send_fd(unix_tcp_sock, &c, sizeof(c), c->s);
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 			if (n<0){
 				LOG(L_ERR, "BUG: tcp_send: failed send_fd: %s (%d)\n",
 						strerror(errno), errno);
 				goto end;
 			}
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 			goto send_it;
 		}
 get_fd:
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 			/* todo: see if this is not the same process holding
 			 *  c  and if so send directly on c->fd */
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 			DBG("tcp_send: tcp connection found, acquiring fd\n");
 			/* get the fd */
 			response[0]=(long)c;
 			response[1]=CONN_GET_FD;
 			n=write(unix_tcp_sock, response, sizeof(response));
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 			if (n<0){
 				LOG(L_ERR, "BUG: tcp_send: failed to get fd(write):%s (%d)\n",
 						strerror(errno), errno);
 				goto release_c;
 			}
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 			DBG("tcp_send, c= %p, n=%d\n", c, n);
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 			n=receive_fd(unix_tcp_sock, &c, sizeof(c), &fd);
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 			if (n<0){
 				LOG(L_ERR, "BUG: tcp_send: failed to get fd(receive_fd):"
 							" %s (%d)\n", strerror(errno), errno);
 				goto release_c;
 			}
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 			DBG("tcp_send: after receive_fd: c= %p n=%d fd=%d\n",c, n, fd);
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 send_it:
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 	DBG("tcp_send: sending...\n");
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 	n=write(fd, buf, len);
 	DBG("tcp_send: after write: c= %p n=%d fd=%d\n",c, n, fd);
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 end:
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 	close(fd);
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 release_c:
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 	tcpconn_put(c); /* release c (lock; dec refcnt; unlock) */
 	return n;
 }
 
 
 
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 /* very ineficient for now - FIXME*/
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 void tcpconn_timeout(fd_set* set)
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 {
 	struct tcp_connection *c, *next;
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 	int ticks;
 	unsigned h;;
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 	ticks=get_ticks();
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 	for(h=0; h<TCP_ADDR_HASH_SIZE; h++){
 		c=tcpconn_addr_hash[h];
 		while(c){
 			next=c->next;
 			if ((c->refcnt==0) && (ticks>c->timeout)) {
 				DBG("tcpconn_timeout: timeout for hash=%d - %p (%d > %d)\n",
 						h, c, ticks, c->timeout);
 				if (c->s>0) {
 					FD_CLR(c->s, set);
 					close(c->s);
 				}
 				tcpconn_rm(c);
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 			}
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 			c=next;
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 		}
 	}
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 }
 
 
 
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 int tcp_init(struct socket_info* sock_info)
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 {
 	union sockaddr_union* addr;
 	
 	addr=&sock_info->su;
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 	sock_info->proto=PROTO_TCP;
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 	if (init_su(addr, &sock_info->address, htons(sock_info->port_no))<0){
 		LOG(L_ERR, "ERROR: tcp_init: could no init sockaddr_union\n");
 		goto error;
 	}
 	sock_info->socket=socket(AF2PF(addr->s.sa_family), SOCK_STREAM, 0);
 	if (sock_info->socket==-1){
 		LOG(L_ERR, "ERROR: tcp_init: socket: %s\n", strerror(errno));
 		goto error;
 	}
 	if (bind(sock_info->socket, &addr->s, sockaddru_len(*addr))==-1){
 		LOG(L_ERR, "ERROR: tcp_init: bind(%x, %p, %d) on %s: %s\n",
 				sock_info->socket, &addr->s, 
 				sockaddru_len(*addr),
 				sock_info->address_str.s,
 				strerror(errno));
 		goto error;
 	}
 	if (listen(sock_info->socket, 10)==-1){
 		LOG(L_ERR, "ERROR: tcp_init: listen(%x, %p, %d) on %s: %s\n",
 				sock_info->socket, &addr->s, 
 				sockaddru_len(*addr),
 				sock_info->address_str.s,
 				strerror(errno));
 		goto error;
 	}
 	
 	return 0;
 error:
 	if (sock_info->socket!=-1){
 		close(sock_info->socket);
 		sock_info->socket=-1;
 	}
 	return -1;
 }
 
 
 
 static int send2child(struct tcp_connection* tcpconn)
 {
 	int i;
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 	int min_busy;
 	int idx;
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 	min_busy=tcp_children[0].busy;
 	idx=0;
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 	for (i=0; i<tcp_children_no; i++){
 		if (!tcp_children[i].busy){
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 			idx=i;
 			min_busy=0;
 			break;
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 			return 0;
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 		}else if (min_busy>tcp_children[i].busy){
 			min_busy=tcp_children[i].busy;
 			idx=i;
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 		}
 	}
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 	tcp_children[idx].busy++;
 	tcp_children[idx].n_reqs++;
 	tcpconn->refcnt++;
 	if (min_busy){
 		LOG(L_WARN, "WARNING: send2child:no free tcp receiver, "
 				" connection passed to the least busy one (%d)\n",
 				min_busy);
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 	}
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 	DBG("send2child: to child %d, %ld\n", idx, (long)tcpconn);
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 	send_fd(tcp_children[idx].unix_sock, &tcpconn, sizeof(tcpconn),
 			tcpconn->s);
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 	return 0; /* just to fix a warning*/
 }
 
 
 void tcp_main_loop()
 {
 	int r;
 	int n;
 	fd_set master_set;
 	fd_set sel_set;
 	int maxfd;
 	int new_sock;
 	union sockaddr_union su;
 	struct tcp_connection* tcpconn;
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 	unsigned h;
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 	long response[2];
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 	int cmd;
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 	int bytes;
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 	socklen_t su_len;
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 	struct timeval timeout;
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 	/*init */
 	maxfd=0;
 	FD_ZERO(&master_set);
 	/* set all the listen addresses */
 	for (r=0; r<sock_no; r++){
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 		if ((tcp_info[r].proto==PROTO_TCP) &&(tcp_info[r].socket!=-1)){
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 			FD_SET(tcp_info[r].socket, &master_set);
 			if (tcp_info[r].socket>maxfd) maxfd=tcp_info[r].socket;
 		}
 	}
 	/* set all the unix sockets used for child comm */
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 	for (r=1; r<process_no; r++){
 		if (pt[r].unix_sock>0){ /* we can't have 0, we never close it!*/
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 			FD_SET(pt[r].unix_sock, &master_set);
 			if (pt[r].unix_sock>maxfd) maxfd=pt[r].unix_sock;
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 		}
 	}
 	
 	
 	/* main loop*/
 	
 	while(1){
 		sel_set=master_set;
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 		timeout.tv_sec=TCP_MAIN_SELECT_TIMEOUT;
 		timeout.tv_usec=0;
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 		n=select(maxfd+1, &sel_set, 0 ,0 , &timeout);
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 		if (n<0){
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 			if (errno==EINTR) continue; /* just a signal */
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 			/* errors */
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 			LOG(L_ERR, "ERROR: tcp_main_loop: select:(%d) %s\n", errno,
 					strerror(errno));
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 			n=0;
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 		}
 		
 		for (r=0; r<sock_no && n; r++){
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 			if ((FD_ISSET(tcp_info[r].socket, &sel_set))){
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 				/* got a connection on r */
 				su_len=sizeof(su);
 				new_sock=accept(tcp_info[r].socket, &(su.s), &su_len);
 				n--;
 				if (new_sock<0){
 					LOG(L_ERR,  "WARNING: tcp_main_loop: error while accepting"
 							" connection(%d): %s\n", errno, strerror(errno));
 					continue;
 				}
 				
 				/* add socket to list */
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 				tcpconn=tcpconn_new(new_sock, &su, &tcp_info[r]);
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 				if (tcpconn){
 					tcpconn_add(tcpconn);
 					DBG("tcp_main_loop: new connection: %p %d\n",
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 						tcpconn, tcpconn->s);
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 					/* pass it to a child */
 					if(send2child(tcpconn)<0){
 						LOG(L_ERR,"ERROR: tcp_main_loop: no children "
 								"available\n");
 						close(tcpconn->s);
 						tcpconn_rm(tcpconn);
 					}
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 				}
 			}
 		}
 		
8aeb47e2
 		/* check all the read fds (from the tcpconn_addr_hash ) */
 		for (h=0; h<TCP_ADDR_HASH_SIZE; h++){
 			for(tcpconn=tcpconn_addr_hash[h]; tcpconn && n; 
 					tcpconn=tcpconn->next){
 				if ((tcpconn->refcnt==0)&&(FD_ISSET(tcpconn->s, &sel_set))){
 					/* new data available */
 					n--;
 					/* pass it to child, so remove it from select list */
 					DBG("tcp_main_loop: data available on %p [h:%d] %d\n",
 							tcpconn, h, tcpconn->s);
 					FD_CLR(tcpconn->s, &master_set);
 					if (send2child(tcpconn)<0){
 						LOG(L_ERR,"ERROR: tcp_main_loop: no "
 									"children available\n");
 						close(tcpconn->s);
 						tcpconn_rm(tcpconn);
 					}
5b532c7f
 				}
 			}
 		}
 		/* check unix sockets & listen | destroy connections */
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 		/* start from 1, the "main" process does not transmit anything*/
 		for (r=1; r<process_no && n; r++){
f2f969dd
 			if ( (pt[r].unix_sock>0) && FD_ISSET(pt[r].unix_sock, &sel_set)){
 				/* (we can't have a fd==0, 0 i s never closed )*/
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 				n--;
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 				/* errno==EINTR !!! TODO*/
 read_again:
0c5da34b
 				bytes=read(pt[r].unix_sock, response, sizeof(response));
6a157851
 				if (bytes==0){
6ee62314
 					/* EOF -> bad, child has died */
6a157851
 					LOG(L_CRIT, "BUG: tcp_main_loop: dead child %d\n", r);
0c5da34b
 					/* don't listen on it any more */
 					FD_CLR(pt[r].unix_sock, &master_set);
6ee62314
 					/*exit(-1)*/;
6a157851
 				}else if (bytes<0){
 					if (errno==EINTR) goto read_again;
 					else{
 						LOG(L_CRIT, "ERROR: tcp_main_loop: read from child: "
 								" %s\n", strerror(errno));
 						/* try to continue ? */
 					}
 				}
 					
0c5da34b
 				DBG("tcp_main_loop: read response= %lx, %ld from %d (%d)\n",
 						response[0], response[1], r, pt[r].pid);
 				cmd=response[1];
 				switch(cmd){
 					case CONN_RELEASE:
 						if (pt[r].idx>=0){
 							tcp_children[pt[r].idx].busy--;
 						}else{
 							LOG(L_CRIT, "BUG: tcp_main_loop: CONN_RELEASE\n");
 						}
 						tcpconn=(struct tcp_connection*)response[0];
 						if (tcpconn){
 							tcpconn->refcnt--;
 							DBG("tcp_main_loop: %p refcnt= %d\n", 
 									tcpconn, tcpconn->refcnt);
 								FD_SET(tcpconn->s, &master_set);
 								if (maxfd<tcpconn->s) maxfd=tcpconn->s;
 								/* update the timeout*/
 								tcpconn->timeout=get_ticks()+TCP_CON_TIMEOUT;
 						}
 						break;
 					case CONN_ERROR:
 					case CONN_DESTROY:
 					case CONN_EOF:
 						if (pt[r].idx>=0){
 							tcp_children[pt[r].idx].busy--;
 						}else{
 							LOG(L_CRIT, "BUG: tcp_main_loop: CONN_RELEASE\n");
 						}
 						tcpconn=(struct tcp_connection*)response[0];
 						if (tcpconn){
 							tcpconn->refcnt--;
 							if (tcpconn->refcnt==0){
 								DBG("tcp_main_loop: destroying connection\n");
 								close(tcpconn->s);
 								tcpconn_rm(tcpconn);
 							}else{
 								DBG("tcp_main_loop: delaying ...\n");
 							}
 						}
 						break;
 					case CONN_GET_FD:
 						/* send the requested FD  */
 						tcpconn=(struct tcp_connection*)response[0];
 						/* WARNING: take care of setting refcnt properly to
 						 * avoid race condition */
 						if (tcpconn){
 							send_fd(pt[r].unix_sock, &tcpconn,
 									sizeof(tcpconn), tcpconn->s);
 						}else{
 							LOG(L_CRIT, "BUG: tcp_main_loop: null pointer\n");
 						}
 						break;
 					case CONN_NEW:
 						/* update the fd in the requested tcpconn*/
 						tcpconn=(struct tcp_connection*)response[0];
 						/* WARNING: take care of setting refcnt properly to
 						 * avoid race condition */
 						if (tcpconn){
 							receive_fd(pt[r].unix_sock, &tcpconn,
 										sizeof(tcpconn), &tcpconn->s);
 							/* add tcpconn to the list*/
 							tcpconn_add(tcpconn);
5b532c7f
 							FD_SET(tcpconn->s, &master_set);
 							if (maxfd<tcpconn->s) maxfd=tcpconn->s;
6bc40dea
 							/* update the timeout*/
 							tcpconn->timeout=get_ticks()+TCP_CON_TIMEOUT;
5b532c7f
 						}else{
0c5da34b
 							LOG(L_CRIT, "BUG: tcp_main_loop: null pointer\n");
5b532c7f
 						}
0c5da34b
 						break;
 					default:
 							LOG(L_CRIT, "BUG: tcp_main_loop: unknown cmd %d\n",
 									cmd);
5b532c7f
 				}
 			}
 		}
6bc40dea
 		
 		/* remove old connections */
0c5da34b
 		tcpconn_timeout(&master_set);
5b532c7f
 	
 	}
 }
 
 
 
0c5da34b
 int init_tcp()
 {
8aeb47e2
 	/* init lock */
 	tcpconn_lock=lock_alloc();
 	if (tcpconn_lock==0){
 		LOG(L_CRIT, "ERROR: init_tcp: could not alloc lock\n");
 		goto error;
 	}
 	if (lock_init(tcpconn_lock)==0){
 		LOG(L_CRIT, "ERROR: init_tcp: could not init lock\n");
 		lock_dealloc((void*)tcpconn_lock);
 		tcpconn_lock=0;
 		goto error;
 	}
 	/* alloc hashtables*/
 	tcpconn_addr_hash=(struct tcp_connection**)shm_malloc(TCP_ADDR_HASH_SIZE*
 								sizeof(struct tcp_connection*));
 
 	if (tcpconn_addr_hash==0){
 		LOG(L_CRIT, "ERROR: init_tcp: could not alloc address hashtable\n");
 		lock_destroy(tcpconn_lock);
 		lock_dealloc((void*)tcpconn_lock);
 		tcpconn_lock=0;
 		goto error;
 	}
 	
 	tcpconn_id_hash=(struct tcp_connection**)shm_malloc(TCP_ID_HASH_SIZE*
 								sizeof(struct tcp_connection*));
 	if (tcpconn_id_hash==0){
 		LOG(L_CRIT, "ERROR: init_tcp: could not alloc id hashtable\n");
 		shm_free(tcpconn_addr_hash);
 		tcpconn_addr_hash=0;
 		lock_destroy(tcpconn_lock);
 		lock_dealloc((void*)tcpconn_lock);
 		tcpconn_lock=0;
0c5da34b
 		goto error;
 	}
8aeb47e2
 	/* init hashtables*/
 	memset((void*)tcpconn_addr_hash, 0, 
 			TCP_ADDR_HASH_SIZE * sizeof(struct tcp_connection*));
 	memset((void*)tcpconn_id_hash, 0, 
 			TCP_ID_HASH_SIZE * sizeof(struct tcp_connection*));
0c5da34b
 	return 0;
 error:
 		return -1;
 }
 
 
 
8aeb47e2
 /* cleanup before exit */
 void destroy_tcp()
 {
 	if (tcpconn_lock){
 		lock_destroy(tcpconn_lock);
 		lock_dealloc((void*)tcpconn_lock);
 		tcpconn_lock=0;
 	}
 	if(tcpconn_addr_hash){
 		shm_free(tcpconn_addr_hash);
 		tcpconn_addr_hash=0;
 	}
 	if(tcpconn_id_hash){
 		shm_free(tcpconn_id_hash);
 		tcpconn_id_hash=0;
 	}
 }
 
 
 
5b532c7f
 /* starts the tcp processes */
6ee62314
 int tcp_init_children()
5b532c7f
 {
 	int r;
 	int sockfd[2];
 	pid_t pid;
 	
 	
 	/* create the tcp sock_info structures */
f2f969dd
 	/* copy the sockets --moved to main_loop*/
5b532c7f
 	
 	/* fork children & create the socket pairs*/
 	for(r=0; r<tcp_children_no; r++){
 		if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sockfd)<0){
 			LOG(L_ERR, "ERROR: tcp_main: socketpair failed: %s\n",
 					strerror(errno));
 			goto error;
 		}
 		
6ee62314
 		process_no++;
5b532c7f
 		pid=fork();
 		if (pid<0){
 			LOG(L_ERR, "ERROR: tcp_main: fork failed: %s\n",
 					strerror(errno));
 			goto error;
 		}else if (pid>0){
 			/* parent */
 			close(sockfd[1]);
 			tcp_children[r].pid=pid;
 			tcp_children[r].busy=0;
 			tcp_children[r].n_reqs=0;
0c5da34b
 			tcp_children[r].unix_sock=sockfd[0];
6ee62314
 			pt[process_no].pid=pid;
0c5da34b
 			pt[process_no].unix_sock=sockfd[0];
 			pt[process_no].idx=r;
6ee62314
 			strncpy(pt[process_no].desc, "tcp receiver", MAX_PT_DESC);
5b532c7f
 		}else{
 			/* child */
 			close(sockfd[0]);
0c5da34b
 			unix_tcp_sock=sockfd[1];
5b532c7f
 			tcp_receive_loop(sockfd[1]);
 		}
 	}
6ee62314
 	return 0;
5b532c7f
 error:
 	return -1;
 }
 
 #endif