*
* Usage: echo -h give all info's
*
- * $Id: TCP_echo.c,v 1.11 2003/10/20 22:44:16 piccardi Exp $
- *
****************************************************************/
/*
* Include needed headers
*/
-#include <sys/types.h> /* predefined types */
-#include <unistd.h> /* include unix standard library */
-#include <arpa/inet.h> /* IP addresses conversion utiliites */
-#include <sys/socket.h> /* socket library */
-#include <stdio.h> /* include standard I/O library */
-#include <errno.h> /* include error codes */
-#include <string.h> /* include erroro strings definitions */
+#include <sys/types.h> /* primitive system data types */
+#include <unistd.h> /* unix standard library */
+#include <arpa/inet.h> /* IP addresses conversion utilities */
+#include <sys/socket.h> /* socket constants, types and functions */
+#include <stdio.h> /* standard I/O library */
+#include <errno.h> /* error definitions and routines */
+#include <string.h> /* C strings library */
+#include <stdlib.h> /* C standard library */
+#include <netinet/tcp.h> /* TCP constants and types */
+
+/* still not defined in some include, because too new ... */
+#ifndef TCP_CONGESTION
+#define TCP_CONGESTION 13
+#endif
#include "Gapil.h"
#include "macros.h"
* Variables definition
*/
int sock, i;
+ socklen_t len;
int reset = 0;
+ int verbosity = 0;
+ char buffer[MAXLINE];
struct linger ling;
/*
* Input section: decode parameters passed in the calling
* Use getopt function
*/
opterr = 0; /* don't want writing to stderr */
- while ( (i = getopt(argc, argv, "hr")) != -1) {
+ while ( (i = getopt(argc, argv, "hrv")) != -1) {
switch (i) {
/*
* Handling options
usage();
return(1);
break;
+ case 'v':
+ verbosity = 1;
+ break;
case 'r':
reset = 1;
break;
* Main code beginning
*
* ***********************************************************/
- /* call sockaddr to get a connected socket */
+ /* call sockconn to get a connected socket */
if ( (sock = sockconn(argv[optind], "echo", 6, SOCK_STREAM)) < 0) {
if (errno) perror("Socket creation error");
return 1;
}
+ /* print some info about the socket, used to test some TCP_* options */
+ if (verbosity) {
+ len = sizeof(buffer);
+ if (getsockopt(sock, SOL_TCP, TCP_CONGESTION, buffer, &len) < 0) {
+ perror("Cannot read congestion algorithm");
+ } else {
+ buffer[len]=0;
+ printf("Congestion algorithm %s\n", buffer);
+ }
+ }
/* check if resetting on close is required */
if (reset) {
printf("Setting reset on close \n");