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wanpipe/api/mpapi/x25/svc_client.c

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/*****************************************************************************
* svc_client.c X25 API: SVC Client Application
*
* Author(s): Nenad Corbic <ncorbic@sangoma.com>
*
* Copyright: (c) 1995-2003 Sangoma Technologies Inc.
*
* This program 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.
* ============================================================================
*
* Description:
*
* The svc_utility utility will establish, user defined number, of
* outgoing calls and tx/rx, user defined number, of packets on each
* active svc.
*
* This utility should be used as an architectual model. It is up to
* the user to handle all conditions of x25. Please refer to the
* X25API programming manual for futher details.
*/
/*===========================================================
* Header Files: Includes
*==========================================================*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <time.h>
#include <netinet/in.h>
#include <linux/if_wanpipe.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <wait.h>
#include <linux/wanpipe.h>
#include <linux/wanpipe_x25_kernel.h>
#include <linux/if_ether.h>
#include "lib_api.h"
/*===========================================================
* Defines
*==========================================================*/
#define FALSE 0
#define TRUE 1
#define TX_PACKET_LEN 5000
#define MAX_RX_PKT_LEN 5000
#define MAX_X25_ADDR_SIZE 16
#define MAX_X25_DATA_SIZE 129
#define MAX_X25_FACL_SIZE 110
#define MAX_SOCK_NUM 255
#define TIMEOUT 10
#define NOWAIT_ON_CONNECT 1
#define APP_NAME "svc_client"
/*===========================================================
* Global Variables
*==========================================================*/
/* A single packet will be used to simulate tx data */
unsigned char Tx_data[TX_PACKET_LEN];
/* A singel Rx buffer will be used to accept incoming
* data. The buffer will be overwritten with each new
* packet. */
unsigned char Rx_data[MAX_RX_PKT_LEN];
/* For each socket created, we will keep the
* socket file descriptor and tx/rx pkt counts */
typedef struct sock_api {
int sock;
int tx;
int rx;
int mtu;
int mru;
}sock_api_t;
sock_api_t sock_fd[MAX_SOCK_NUM];
int max_sock_fd=0;
/* X25 tx/rx header structure. This structure will
* be used to send commands down to the driver, as
* well as read/insert header information from/into
* rx and tx data respectively.
*
* Defined globaly so it would only get allocated once.
*/
x25api_t api_cmd;
unsigned char prognamed[100];
/*============================================================
Function Prototypes
*===========================================================*/
int MakeConnection( char * );
void tx_rx_data( void);
void setup_signal_handlers (void);
void quit (int);
int decode_oob_event(x25api_t* api_hdr, int sk_index);
int issue_clear_call(int i, int opt, int cause, int diagn);
void sig_chld (int sigio);
void sig_hnd (int sigio);
int rx_data_act(int i);
int tx_data_act(int i,int Tx_lgth);
int handle_oob_event(int sk_index);
void close_connection(int i);
/*=============================================================
* Main:
*
* o Make a socket connection to the driver.
* o Call tx_rx_data() to transmit/receive data
*
*============================================================*/
int main(int argc, char* argv[])
{
int proceed;
pid_t pid;
int stat;
int i;
sprintf(prognamed,"%s[%i]",APP_NAME,getpid());
card_cnt=1;
if (init_args(argc,argv) == 0){
usage(argv[0]);
return -EINVAL;
}
signal(SIGCHLD,&sig_chld);
signal(SIGINT,&sig_hnd);
signal(SIGTERM,&sig_hnd);
memset(sock_fd,0,sizeof(sock_fd));
printf("\n%s: Attempting to establish %i calls, and tx %i (%i bytes) packets \n",
prognamed, tx_channels, tx_cnt, tx_size);
proceed = MakeConnection(if_name);
if (proceed == TRUE){
tx_rx_data();
/* Wait for the clear call children */
while ((pid=waitpid(-1,&stat,WUNTRACED)) > 0){
//printf("Child %d terminated\n",pid);
}
}
for (i=0;i<tx_channels;i++){
if (!sock_fd[i].sock)
continue;
close(sock_fd[i].sock);
sock_fd[i].sock=0;
}
return 0;
};
/*===========================================================
* MakeConnection
*
* For user defined number of connections
* o Create a Socket
* o Bind a socket to a wanpipe network interface
* o Setup x25 place call information
* o Place call using connect()
* o Read out the lcn used for that connection
*==========================================================*/
int MakeConnection (char *i_name )
{
int len = sizeof(struct wan_sockaddr_ll);
int err = 0;
struct wan_sockaddr_ll sa;
int i;
int calls_issued=0;
pid_t pid;
for (i=0; i<tx_channels; i++){
memset(&sa,0,sizeof(struct wan_sockaddr_ll));
/* Create a new socket */
sock_fd[i].sock = socket( AF_WANPIPE, SOCK_RAW, AF_WANPIPE);
if( sock_fd[i].sock < 0 ) {
perror("Socket: ");
sock_fd[i].sock=0;
return FALSE;
}
/* Fill in binding information
* before we use connect() system call
* a socket must be binded into a virtual
* network interface svc_connect.
*
* Card name must be supplied as well. In
* this case the user supplies the name
* eg: wanpipe1.
*/
sa.sll_family = AF_WANPIPE;
sa.sll_protocol = htons(ETH_P_X25);
strcpy(sa.sll_device, "svc_connect");
strcpy(sa.sll_card, i_name);
/* Bind a sock using the above address structure */
if(bind(sock_fd[i].sock, (struct sockaddr *)&sa, sizeof(struct wan_sockaddr_ll)) == -1){
perror("Bind: ");
printf("Failed to bind socket to %s interface\n",i_name);
close(sock_fd[i].sock);
sock_fd[i].sock=0;
continue;
}
/* Reset the api command structure */
memset(&api_cmd, 0, sizeof(x25api_t));
/* Write the call data into the command structure.
* Note: -u data must be have even number of characters.
* -f field cannot be set to zero (i.e. -f0)
* Refer to x25.pdf hardware manual.
*/
sprintf(api_cmd.data,"-d%s -s%s -u%s",
daddr,
saddr,
udata);
api_cmd.hdr.length = strlen(api_cmd.data);
/* Write the call data into a socket mail box using
* the following ioctl call. This must be one before
* the connect system call
*/
if ((err=ioctl(sock_fd[i].sock,SIOC_X25_SET_CALL_DATA,&api_cmd)) != 0){
perror("Set Call Data: ");
printf ("%s: Setting call data Failed 0x%X!\n",
prognamed,SIOC_X25_SET_CALL_DATA);
close(sock_fd[i].sock);
sock_fd[i].sock=0;
continue;
}
/* Set the pid information used by the wanpipe
* proc file system: /proc/net/wanrouter/map
* (Optional) */
pid=getpid();
if ((err=ioctl(sock_fd[i].sock,SIOC_X25_SET_LCN_PID,&pid))){
perror("Set LCN PID: ");
printf("Failed to sending down my pid %i\n",pid);
close(sock_fd[i].sock);
sock_fd[i].sock=0;
continue;
}
/* Set the label information used by the wanpipe
* proc file system: /proc/net/wanrouter/map
* (Optional) */
sprintf(prognamed,"%s",APP_NAME);
if ((err=ioctl(sock_fd[i].sock,SIOC_X25_SET_LCN_LABEL,prognamed))){
perror("Label: ");
printf("%s: Failed to configure label\n",prognamed);
close(sock_fd[i].sock);
sock_fd[i].sock=0;
continue;
}
sprintf(prognamed,"%s[%i]",APP_NAME,getpid());
/* Now we are ready to place a call. The address
* structure is optional. The sa structure will contain
* a network interface name on which the connection was
* established
*/
if (connect(sock_fd[i].sock, (struct sockaddr *)&sa, len) != 0){
perror("Connect: ");
printf("%s: Failed to place call !\n",prognamed);
close(sock_fd[i].sock);
sock_fd[i].sock=0;
continue;
}
/* In order to see what lcn we have established connection on,
* run GET CALL DATA ioctl call, which will return the
* appropriate information into api_cmd structure
*/
if ((err=ioctl(sock_fd[i].sock,SIOC_X25_GET_CALL_DATA,&api_cmd)) != 0){
perror("Get Call Data: ");
printf("%s: Failed to obtain call data!\n",prognamed);
close(sock_fd[i].sock);
sock_fd[i].sock=0;
continue;
}
/* Determine the negotiated values such as lcn number
* mtu and mru */
sock_fd[i].mtu=api_cmd.hdr.mtu;
sock_fd[i].mru=api_cmd.hdr.mru;
printf("%s: Call Bounded to LCN=%i MTU=%i MRU=%i \n",
prognamed,
api_cmd.hdr.lcn,
api_cmd.hdr.mtu,
api_cmd.hdr.mru);
calls_issued++;
if (sock_fd[i].sock > max_sock_fd){
max_sock_fd=sock_fd[i].sock;
}
/* Flush all pending print statements to screen */
fflush(stdout);
}
/* At this point all the calls has been placed. If the connect() function
* has been used in blocking mode, then we will wait in select() for
* the accept calls to come in. Otherwise, the calls have been accepted,
* and can proceed to tx and rx data. */
printf("%s: Issued %i Calls, Requested %i\n\n\n",
prognamed,calls_issued,tx_channels);
return TRUE;
}
/*=================================================================
* TX_RX_DATA
*
* o Send and Receive data via socket
* o Create a tx packet using x25api_t data type.
* o Both the tx and rx packets contains 16 bytes headers
* in front of the real data. It is the responsibility
* of the applicatino to insert this 16 bytes on tx, and
* remove the 16 bytes on rx.
*
* ------------------------------------------
* | 16 bytes | X bytes ...
* ------------------------------------------
* Header Data
*
* o 16 byte Header: data structure:
*
* typedef struct {
* unsigned char qdm PACKED; Q/D/M bits
* unsigned char cause PACKED; cause field
* unsigned char diagn PACKED; diagnostics
* unsigned char pktType PACKED;
* unsigned short length PACKED;
* unsigned char result PACKED;
* unsigned short lcn PACKED;
* char reserved[7] PACKED;
* }x25api_hdr_t;
*
* typedef struct {
* x25api_hdr_t hdr PACKED;
* char data[X25_MAX_DATA] PACKED;
* }x25api_t;
*
* TX DATA:
* --------
* Each tx data packet must contain the above 16 byte header!
*
* Only relevant byte in the 16 byte tx header, is the
* QDM byte. The driver will look at this byte to determine
* if the Mbit (more data bit) should be set.
*
* QDM: byte is a bit map of three bits:
*
* Q bit: Bit 2 : Qualifier bit, special kind of packet.
* Can be used as control packet.
* D bit: Bit 1 : Data acknolwedge bit. The remote will
* acknowledge every packet sent.
* M bit: Bit 0 : If your packet is greater than x25 MTU,
* i.e 1024 bytes, than cut the packet to MTU size
* and set the M bit to indicate more data.
*
* RX DATA:
* --------
* Each rx data will contain the above 16 byte header!
*
* Relevant bytes in the 16 byte rx header, are the
* LCN and QDM bytes.
*
* QDM: byte is a bit map of three bits:
*
* Q bit: Bit 2 : Qualifier bit, special kind of packet.
* Can be used as control packet.
* D bit: Bit 1 : Data acknolwedge bit. The remote will
* acknowledge every packet sent.
* M bit: Bit 0 : If your packet is greater than x25 MTU,
* i.e 1024 bytes, than cut the packet to MTU size
* and set the M bit to indicate more data.
*
* LCN = contains the lcn number for the rx frame.
*
* OOB DATA:
* ---------
* The OOB (out of band) data is used by the driver to
* indicate x25 events for the active channel:
* clear call, or restarts.
*
* Each OOB packet contains the above 16 byte header!
*
* Relevant bytes in the 16 byte oob header, are the
* pktType, cause and diagn bytes.
*
* pktType = event type (ex Clear Call, Restart ...)
* cause = x25 cause of the event
* diagn = x25 diagnostic information used to determine
* the cause of the event.
*
* Upon receiving an event, the sock should be considered
* DEAD!!! Meaning it must be closed using the close()
* function.
*/
void tx_rx_data(void)
{
unsigned short timeout=0;
int err=0, i;
struct timeval tv;
x25api_t* api_tx_el;
fd_set writeset,readset,oobset;
/* Setup a timeout value for the select statement, which is
* going to block until the socket(s) are/is ready to tx/rx
* or oob. In this case we will timeout afte 10 seconds of
* inactivity */
tv.tv_usec = 0;
tv.tv_sec = 10;
/* Cast the x25 16 byte header to the begining
* of the tx packet. Using the pointer fill
* in appropriate header information such as
* QDM bits */
api_tx_el = (x25api_t *)Tx_data;
/* Initialize the 16 byte header */
memset(api_tx_el, 0, sizeof(x25api_hdr_t));
/* Set the Mbit (more bit)
* currently this option is disabled */
#ifdef MORE_BIT_SET
api_tx_el->hdr.qdm = 0x01
#endif
/* Fill in the tx packet data with arbitrary
* information */
for (i=0; i<tx_size ; i++){
api_tx_el->data[i] = (unsigned char) i;
}
/* Start an infinite loop which will tx/rx data
* over connected x25 svc's */
for(;;) {
tv.tv_usec = 0;
tv.tv_sec = 10;
/* Initialize select() flags */
FD_ZERO(&readset);
FD_ZERO(&oobset);
FD_ZERO(&writeset);
/* For all connected sockets, tell the select
* what to wait for. Tx, Rx and OOB */
for (i=0;i<tx_channels;i++){
if (!sock_fd[i].sock)
continue;
FD_SET(sock_fd[i].sock,&readset);
FD_SET(sock_fd[i].sock,&oobset);
if (write_enable){
FD_SET(sock_fd[i].sock,&writeset);
}
}
/* The select function must be used to implement flow control.
* WANPIPE socket will block the user if the socket cannot send
* or there is nothing to receive.
*
* By using the last socket file descriptor +1 select will wait
* for all active x25 sockets.
*
* If the NONBLOCKING option has been used during connect()
* the select will wait untill the channel is connected
* (i.e. accept has been received). Once the channel is connected
* the tx and rx will start. However, if the call is cleared for
* any reason, the OOB message will indicate that event.
*/
if((err=select(max_sock_fd + 1,&readset, &writeset, &oobset, &tv))){
/* One of the sockets returned OK for tx rx or oob
* Thus, for all waiting connections, check each flag */
for (i=0;i<tx_channels;i++){
if (!sock_fd[i].sock)
continue;
/* First check for OOB messages */
if (FD_ISSET(sock_fd[i].sock,&oobset)){
if (handle_oob_event(i)){
close_connection(i);
}
goto svc_action;
}
if (FD_ISSET(sock_fd[i].sock,&readset)){
if (rx_data_act(i)){
close_connection(i);
goto svc_action;
}
}
if (FD_ISSET(sock_fd[i].sock,&writeset)){
tx_data_act(i,tx_size);
/* In this example I am clearing the connection
* after I sent user specified number of packets */
if (tx_delay)
sleep(tx_delay);
//if (sock_fd[i].tx == 10){
// ioctl(sock_fd[i].sock,SIOC_X25_RESET_CALL,0);
//}
if (sock_fd[i].tx >= tx_cnt){
issue_clear_call(i, CLEAR_WAIT_FOR_DATA, cause, diagn);
close_connection(i);
}
}
}
svc_action:
/* All channels are down ! */
if (!max_sock_fd){
break;
}
}else{
/* select timeout occured. The svc could be
* waiting for the accept, or there is something wrong
* with the x25 configuration.
*
* It is up to the user to handle this condition
* as they see fit */
if (err == 0){
if (++timeout == 5){
printf("Select() timeout exceeded MAXIMUM\n");
break;
}
printf("Select() timeout try again !!!\n");
}else{
printf("Error in Select() !!!\n");
break;
}
}//if select
}//for
for (i=0;i<tx_channels;i++){
if (!sock_fd[i].sock)
continue;
close(sock_fd[i].sock);
sock_fd[i].sock=0;
}
}
int tx_data_act(int i, int Tx_lgth)
{
int err;
x25api_t* api_tx_el = (x25api_t *)Tx_data;
/* This socket is ready to tx */
#if 0
if (Tx_lgth > sock_fd[i].mtu){
printf("%s: Tx warning: Tx length %i > MTU %i, using MTU!\n",
prognamed,Tx_lgth,sock_fd[i].mtu);
Tx_lgth=sock_fd[i].mtu;
}
#endif
/* The tx packet length contains the 16 byte
* header. The tx packet was created above. */
err = send(sock_fd[i].sock, Tx_data,
Tx_lgth + sizeof(x25api_hdr_t), 0);
/* err contains number of bytes transmited */
if (err>0){
++sock_fd[i].tx;
if (verbose){
printf("%s: SockId=%i : TX : size=%i, qdm=0x%02X, cnt=%i\n",
prognamed,
sock_fd[i].sock,
Tx_lgth,
api_tx_el->hdr.qdm,
sock_fd[i].tx);
}
}else{
if (errno != EBUSY){
perror("Send");
}
}
/* If err<=0 it means that the send failed and that
* driver is busy. Thus, the packet should be
* requeued for re-transmission on the next
* try !!!!
*/
return 0;
}
int rx_data_act(int i)
{
int err;
/* This socket has received a packet. */
err = recv(sock_fd[i].sock, Rx_data, sizeof(Rx_data), 0);
/* err contains number of bytes transmited */
if(err < 0 ) {
perror("Recv");
/* This should never happen. However, check the sock state:
* if we are still connected, proceed with normal operation.
*/
if ((err=ioctl(sock_fd[i].sock,SIOC_WANPIPE_SOCK_STATE,0)) == X25_OK){
return 0;
}
printf("%s: Sockid=%i : Failed to rcv packet %i\n",
prognamed,
sock_fd[i].sock,
err);
return 1;
}else{
/* Packet received OK !
*
* Every received packet comes with the 16
* bytes of header which driver adds on.
* Header is structured as x25api_hdr_t.
* (same as above)
*/
x25api_hdr_t *api_data =
(x25api_hdr_t *)Rx_data;
if (!read_enable){
return 0;
}
err-=sizeof(x25api_hdr_t);
if (err > sock_fd[i].mru){
/* This should never happen, sanity check */
printf("%s: Rx warning: Rx len %i > MRU %i\n",
prognamed,
err,sock_fd[i].mru);
}
if (api_data->qdm & 0x01){
/* More bit is set, thus
* handle it accordingly
* FIXME */
}
++sock_fd[i].rx;
if (verbose){
printf("%s: SockId=%i : RX : size=%i, qdm=0x%02X, cnt=%i\n",
prognamed,
sock_fd[i].sock,
err,
api_data->qdm,
sock_fd[i].rx);
}
}
return 0;
}
int handle_oob_event(int i)
{
int err;
x25api_t* api_tx_el;
/* The OOB Message will indicate that an
* asynchronous event occured. The applicaton
* must stop everything and check the state of
* the link. Since link might
* have gone down */
/* In this example I just exit. A real
* application would check the state of the
* sock first by reading the header information.
*/
/* IMPORTANT:
* If we fail to read the OOB message, we can
* assume that the link is down. Thus, close
* the socket and continue !!! */
err = recv(sock_fd[i].sock, Rx_data, sizeof(Rx_data), MSG_OOB);
/* err contains number of bytes transmited */
if (err < 0){
/* The state of the socket is disconnected.
* We must close the socket and continue with
* operatio */
if ((err=ioctl(sock_fd[i].sock,SIOC_WANPIPE_SOCK_STATE,0)) == X25_OK){
return 0;
}
printf("%s: SockId=%i : OOB Event : State = %s\n",
prognamed,sock_fd[i].sock,
err == 1 ? "Disconnected" : "(Dis/Con)necting");
memset(&api_cmd,0,sizeof(api_cmd));
if ((err=ioctl(sock_fd[i].sock,SIOC_X25_GET_CALL_DATA,&api_cmd)) == 0){
if (decode_oob_event(&api_cmd, i) == 0){
return 1;
}
}else{
return 1;
}
/* Do what ever you have to do to handle
* this condiditon */
}else{
/* OOB packet received OK ! */
api_tx_el = (x25api_t *)Rx_data;
#if 0
printf("%s: SockId=%i : OOB : Packet type 0x%02X, Cause 0x%02X,"
" Diagn 0x%02X, Result 0x%02X, Len %i, LCN %i\n",
prognamed,
sock_fd[i].sock,
api_tx_el->hdr.pktType,
api_tx_el->hdr.cause,
api_tx_el->hdr.diagn,
api_tx_el->hdr.result,
api_tx_el->hdr.length,
api_tx_el->hdr.lcn);
#endif
if (decode_oob_event(api_tx_el, i) == 0){
return 0;
}else{
return 1;
}
}
return 0;
}
int decode_oob_event(x25api_t* api_hdr, int sk_index)
{
switch (api_hdr->hdr.pktType){
case RESET_REQUEST_PKT:
printf("%s: SockId=%i : OOB : Rx Reset Call : Lcn=%i : diag=0x%02X : cause=0x%02X\n",
prognamed,
sock_fd[sk_index].sock,
api_hdr->hdr.lcn,
api_hdr->hdr.diagn,
api_hdr->hdr.cause);
/* NOTE: we don't have to close the socket,
* since the reset doesn't clear the call
* however, it means that there is something really
* wrong and that data has been lost */
return 1;
case CLEAR_REQUEST_PKT:
printf("%s: SockId=%i : OOB : Rx Clear Call : Lcn=%i : diag=0x%02X : cause=0x%02X\n",
prognamed,
sock_fd[sk_index].sock,
api_hdr->hdr.lcn,
api_hdr->hdr.diagn,
api_hdr->hdr.cause);
break;
case RESTART_REQUEST_PKT:
printf("%s: SockId=%i : OOB : Rx Restart Req : Lcn=%i : diag=0x%02X : cause=0x%02X\n",
prognamed,
sock_fd[sk_index].sock,
api_hdr->hdr.lcn,
api_hdr->hdr.diagn,
api_hdr->hdr.cause);
break;
case INTERRUPT_PKT:
printf("%s: SockId=%i : OOB : Rx Interrupt Req : Lcn=%i : diag=0x%02X : cause=0x%02X\n",
prognamed,
sock_fd[sk_index].sock,
api_hdr->hdr.lcn,
api_hdr->hdr.diagn,
api_hdr->hdr.cause);
break;
default:
printf("%s: SockId=%i : OOB : Rx Type=0x%02X : Lcn=%i : diag=0x%02X : cause=0x%02X\n",
prognamed,
sock_fd[sk_index].sock,
api_hdr->hdr.pktType,
api_hdr->hdr.lcn,
api_hdr->hdr.diagn,
api_hdr->hdr.cause);
break;
}
return 0;
}
/* ============================================================
* issue_clear_call
*
* Input options (opt):
* CLEAR_WAIT_FOR_DATA : Fail the clear call if data is
* still pending the transmisstion.
* This way tx data is not lost
* due to the clear call.
* CLEAR_NO_WAIT: Clear call regardless of current
* pending data.
*
* NOTE: This function can block, which can cause buffer
* overrun on other lcn's. Thus, it should be executed
* in a separate process.
*/
int issue_clear_call(int i, int opt, int cause, int diag)
{
//FIXME: Fork is expensive use Pthread
if (fork() == 0){
sprintf(prognamed,"%s[%i]",APP_NAME,getpid());
if (opt){
int cnt=0;
while(ioctl(sock_fd[i].sock,SIOC_WANPIPE_CHECK_TX,NULL)){
++cnt;
}
//printf("%s: Wait Count %i\n",prognamed,cnt);
}
memset(&api_cmd,0,sizeof(x25api_t));
api_cmd.hdr.cause=cause;
api_cmd.hdr.diagn=diag;
printf("\n%s: Issuing Clear Call: SockId=%i, Cause=%d Diagn=%d\n\n",
prognamed, sock_fd[i].sock, cause, diag);
if (ioctl(sock_fd[i].sock,SIOC_X25_CLEAR_CALL,&api_cmd)){
perror("Clear Call: ");
}
close(sock_fd[i].sock);
sock_fd[i].sock=0;
exit(0);
}
return 0;
}
void sig_chld (int sigio)
{
pid_t pid;
int stat;
while ((pid=waitpid(-1,&stat,WNOHANG)) > 0){
//printf("Child %d terminated\n",pid);
}
return;
}
void sig_hnd (int sigio)
{
int i;
for (i=0;i<tx_channels;i++){
if (!sock_fd[i].sock)
continue;
close(sock_fd[i].sock);
sock_fd[i].sock=0;
}
exit (0);
}
void new_max_sock_fd(void)
{
int i;
max_sock_fd=0;
for (i=0;i<tx_channels;i++){
if (sock_fd[i].sock > max_sock_fd){
max_sock_fd=sock_fd[i].sock;
}
}
}
void close_connection(int i)
{
close(sock_fd[i].sock);
printf("%s: Connection SockId=%i closed: Tx=%i Rx=%i\n",
prognamed,
sock_fd[i].sock,
sock_fd[i].tx,
sock_fd[i].rx);
if (max_sock_fd == sock_fd[i].sock){
sock_fd[i].sock=0;
new_max_sock_fd();
//printf("%s: Finding new max sock %i\n",prognamed,max_sock_fd);
}
sock_fd[i].sock=0;
}
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