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#include "port/netdb.h" /* for getaddrinfo */
#include "port/stdlib.h" /* for EXIT_XXX */
#include "port/stdio.h" /* for fprintf */
#include "port/string.h" /* for memset */
#include "port/stdbool.h" /* for bool, true, false */
#include <unistd.h> /* for close */
#include <errno.h> /* for errno */
#include <fcntl.h> /* for fcntl */
#include <sys/select.h> /* for select */
static void wolf_network_sock_nonblocking( int fd ) {
int flags;
flags = fcntl( fd, F_GETFL, 0 /* ignored */ );
flags |= O_NONBLOCK;
flags = fcntl( fd, F_SETFL, flags );
}
#define MAX_IDLE_TIMEOUT 10
#define max(a,b) ((a) < (b) ? (b) : (a))
int main( int argc, char *argv[] ) {
char *host;
char *service;
struct addrinfo hints;
struct addrinfo *result;
int error;
int fd;
int res;
int idle_secs;
if( argc != 3 ) {
fprintf( stderr, "usage: test1 <host> <port>\n" );
goto FAIL;
}
host = argv[1];
service = argv[2];
#ifdef _WIN32
WSADATA wsa_data;
WSAStartup( MAKEWORD( 2, 2 ), &wsa_data );
#endif
/* tell getaddrinfo what we want */
memset( &hints, 0, sizeof( struct addrinfo ) );
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
/* resolve the domain name into a list of addresses */
error = getaddrinfo( host, service, &hints, &result );
if( error != 0 ) {
fprintf( stderr, "getaddrinfo failed: %s (%d)\n",
gai_strerror( error ), error );
goto FAIL;
}
fd = socket( result->ai_family, result->ai_socktype, result->ai_protocol );
if( fd < 0 ) {
fprintf( stderr, "socket failed: %s (%d)\n", strerror( errno ), errno );
goto FAIL;
}
res = connect( fd, result->ai_addr, result->ai_addrlen );
if( res < 0 ) {
(void)close( fd );
fprintf( stderr, "connect failed: %s (%d)\n", strerror( errno ), errno );
goto FAIL;
}
wolf_network_sock_nonblocking( STDIN_FILENO );
wolf_network_sock_nonblocking( STDOUT_FILENO );
wolf_network_sock_nonblocking( fd );
idle_secs = 0;
do {
int max_fd;
fd_set read_set;
fd_set write_set;
fd_set error_set;
struct timeval timeout;
FD_ZERO( &read_set );
FD_ZERO( &write_set );
FD_ZERO( &error_set );
timeout.tv_sec = 1;
timeout.tv_usec = 0;
/* set up select mask and compute highest file descriptor number */
max_fd = 0;
max_fd = max( max_fd, STDIN_FILENO );
max_fd = max( max_fd, STDOUT_FILENO );
max_fd = max( max_fd, fd );
FD_SET( STDIN_FILENO, &read_set );
FD_SET( fd, &read_set );
FD_SET( STDOUT_FILENO, &write_set );
FD_SET( fd, &write_set );
FD_SET( STDIN_FILENO, &error_set );
FD_SET( STDOUT_FILENO, &error_set );
FD_SET( fd, &error_set );
res = select( max_fd + 1, &read_set, &write_set, &error_set, &timeout );
if( res < 0 ) {
if( errno == EINTR || errno == EAGAIN ) {
/* skip */
} else {
/* fatal errors */
fprintf( stderr, "select failed: %s (%d)\n",
strerror( errno ), errno );
(void)close( fd );
goto FAIL;
}
} else if( res == 0 ) {
/* timeout */
idle_secs++;
if( idle_secs > MAX_IDLE_TIMEOUT ) {
fprintf( stderr, "Idle connection after %d seconds..terminating\n",
idle_secs );
goto END;
}
} else {
/* something happened */
idle_secs = 0;
if( FD_ISSET( STDOUT_FILENO, &write_set ) ) {
// res = write( STDOUT_FILENO, write_buf
}
}
} while( true );
END:
res = close( fd );
if( res < 0 ) {
fprintf( stderr, "close failed: %s (%d)\n", strerror( errno ), errno );
goto FAIL;
}
freeaddrinfo( result );
goto OK;
FAIL:
#ifdef _WIN32
WSACleanup( );
#endif
return EXIT_FAILURE;
OK:
return EXIT_SUCCESS;
}
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