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/*
* tcpsend [-t timeout] host port [files]
*
* open a TCP/IP connection to port on host and send files
* Super lightweight LPR ???
* tcpsend.c,v 1.1 2000/10/14 21:11:23 papowell Exp
*/
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
char *Prog = "???";
char *msg[] = {
"use: %s [-t timeout] host port [files]",
" -t timeout - try connecting for timeout seconds",
0
};
int max_try = 10;
void do_send( int sock, int fd, char *name );
void Set_linger( int sock, int n );
void usage(void)
{
int i;
fprintf( stderr, msg[0], Prog );
fprintf( stderr, "\n");
for( i = 1; msg[i]; ++i ){
fprintf( stderr, "%s\n", msg[i] );
}
exit(1);
}
char buffer[10*1024];
int main( int argc, char **argv )
{
int n, try;
int sock; /* socket */
char *s, *host, *port;
struct sockaddr_in dest_sin; /* inet socket address */
struct hostent *host_ent = 0;
(void)signal( SIGPIPE, SIG_IGN );
if( argv[0] ) Prog = argv[0];
if( (s = strrchr(Prog,'/')) ){
Prog = s+1;
}
while( (n = getopt(argc, argv, "t:")) != EOF ){
switch(n){
case 't': max_try = atoi(optarg); break;
default: usage(); break;
}
}
if( argc - optind < 2 ) usage();
sock = -1;
memset(&dest_sin, 0, sizeof (dest_sin));
host = argv[optind++];
port = argv[optind++];
if( (host_ent = gethostbyname( host )) ){
dest_sin.sin_family = host_ent->h_addrtype;
if( host_ent->h_length > sizeof( dest_sin.sin_addr ) ){
fprintf(stderr,"%s: address length wrong\n", Prog);
exit(1);
}
memcpy(&dest_sin.sin_addr, host_ent->h_addr_list[0], host_ent->h_length );
} else
/* if( inet_pton( AF_INET, host, &dest_sin.sin_addr ) != 1 ){ */
if( (dest_sin.sin_addr.s_addr = inet_addr( host )) == -1 ){
fprintf(stderr,"%s: cannot find address for '%s'\n", Prog, host );
exit(1);
}
n = atoi(port);
if( n <= 0 ){
fprintf(stderr,"%s: bad port '%s'\n", Prog, port );
exit(1);
}
dest_sin.sin_port = htons(n);
/* we get the printable from the socket address */
#if 0
fprintf(stderr, "connect to '%s',port %d\n",
inet_ntoa( dest_sin.sin_addr )),
(int) ntohs(dest_sin.sin_port) );
#endif
try = 0;
do{
if( sock != -1 ) close(sock );
sock = -1;
sock = socket(AF_INET, SOCK_STREAM, 0 );
if( sock == -1 ){
fprintf(stderr,"%s: socket() failed '%s'\n", Prog, strerror(errno) );
exit(1);
}
n = connect(sock, (void *)&dest_sin, sizeof(dest_sin) );
if( n == -1 && ++try < max_try ){
sleep(1);
} else {
break;
}
}while( n == -1 );
if( n == -1 ){
fprintf(stderr, "%s: connect to '%s',port %d failed after %d tries - %s\n",
Prog,
inet_ntoa( dest_sin.sin_addr),
(int) ntohs(dest_sin.sin_port), try, strerror(errno) );
exit(1);
}
if( optind == argc ){
do_send( sock, 0, "stdin" );
} else for(; optind < argc; ++optind ){
if( (n = open(argv[optind], O_RDONLY, 0)) == -1 ){
fprintf(stderr, "%s: cannot open '%s' - %s\n",
Prog, argv[optind], strerror(errno) );
exit(1);
}
do_send( sock, n, argv[optind] );
close(n);
}
/* we shut down the connection */
shutdown(sock,1);
while( (n = read(sock,&buffer,sizeof(buffer))) > 0 );
close(sock);
return(0);
}
void do_send( int sock, int fd, char *name )
{
int cnt, n, i;
while( (n = read(fd,buffer,sizeof(buffer))) > 0 ){
for( cnt = i = 0; cnt >= 0 && i < n; i += cnt ){
cnt = write(sock,buffer+i,n-i);
}
if( cnt < 0 ){
fprintf(stderr, "%s: cannot write to remote host - %s\n",
Prog, strerror(errno) );
exit(1);
}
}
if( n < 0 ){
fprintf(stderr, "%s: cannot read from '%s' - %s\n",
Prog, name, strerror(errno) );
exit(1);
}
}
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