This program must be compiled with the -D_BSD and -lbsd options. For example, use the cc prog.c -o prog -D_BSD -lbsd command.
/*
* ATM Sockets PVC Server Example
*
* This program opens a PVC an receives data on it.
*
*/
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/ndd_var.h>
#include <sys/atmsock.h>
#define BUFF_SIZE 8192
char buff[BUFF_SIZE];
main(argc, argv)
int argc;
char *argv[];
{
int s; // Socket file descriptor
int error; // Function return code
sockaddr_ndd_atm_t addr; // ATM Socket Address
// Create a socket in the AF_NDD domain of type SOCK_CONN_DGRAM
// and NDD_PROT_ATM protocol.
s = socket(AF_NDD, SOCK_CONN_DGRAM, NDD_PROT_ATM);
if (s == -1) { // Socket either returns the file descriptor
perror("socket"); // or a -1 to indicate an error.
exit(-1);
}
// The bind command associates this socket with a particular
// ATM device, as specified by addr.sndd_atm_nddname.
addr.sndd_atm_len = sizeof(addr);
addr.sndd_atm_family = AF_NDD;
strcpy( addr.sndd_atm_nddname, "atm0" ); // The name of the ATM device
// which is to be used.
error = bind( s, (struct sockaddr *)&addr, sizeof(addr) );
if (error) { // An error from bind would indicate the
perror("bind"); // requested ATM device is not available.
exit(-1); // Check smitty devices.
} /* endif */
// To open a PVC, the addr.sndd_atm_vc_type field of the
// sockaddr_ndd_atm is set to CONN_PVC. The VPI and VCI are
// specified in the fields sndd_atm_addr.number.addr[0] and
// sndd_atm_addr.number.addr[1].
addr.sndd_atm_vc_type = CONN_PVC; // Indicates PVC
addr.sndd_atm_addr.number.addr[0] = 0; // VPI
addr.sndd_atm_addr.number.addr[1] = 15; // VCI
error = connect( s, (struct sockaddr *)&addr, sizeof(addr) );
if (error) { // A connect error may indicate that
perror("connect"); // the VPI/VCI is already in use.
exit(-1);
} /* endif */
while (1) {
error = recv( s, buff, BUFF_SIZE, 0 );
if (error < 0 ) { // Send returns -1 to
perror("recv"); // to indicate an error.
exit(-1); // The errno is set an can
} else { // be displayed with perror.
printf("received %d bytes\n", error ); // Or it returns the number
} // of bytes received
} /* endwhile */
exit(0);
}