#include <stdio.h> /* include standard I/O library */
#include <errno.h> /* include error codes */
#include <string.h> /* include erroro strings definitions */
+#include <stdlib.h>
+#include <netinet/tcp.h>
+/* still not defined in some include, because too new ... */
+#ifndef TCP_CONGESTION
+#define TCP_CONGESTION 13
+#endif
+
+
+
+#include "Gapil.h"
#include "macros.h"
#define MAXLINE 256
* Variables definition
*/
int sock, i;
+ socklen_t len;
int reset = 0;
- struct sockaddr_in serv_add;
+ 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
*
* ***********************************************************/
- /* create socket */
- if ( (sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- perror("Socket creation error");
+ /* 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;
}
- /* initialize address */
- memset((void *) &serv_add, 0, sizeof(serv_add)); /* clear server address */
- serv_add.sin_family = AF_INET; /* address type is INET */
- serv_add.sin_port = htons(7); /* echo port is 7 */
- /* build address using inet_pton */
- if ( (inet_pton(AF_INET, argv[optind], &serv_add.sin_addr)) <= 0) {
- perror("Address creation error");
- return 1;
- }
- /* extablish connection */
- if (connect(sock, (struct sockaddr *)&serv_add, sizeof(serv_add)) < 0) {
- perror("Connection 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) {