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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#define DEBUG
#ifdef DEBUG
#define DBG(fmt, arg...) do { \
printf(fmt, ##arg); \
} while(0)
#else
#define DBG(fmt, arg...) ((void)0)
#endif
static struct sockaddr_in g_dest;
static struct sockaddr_in g_src;
int srcPort = 0;
int destPort = 0;
int times = 0;
void random_str(char *str, const int len)
{
static const char alphaNum[] =
"abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"0123456789";
int i = 0;
for (i = 0; i < len; i++)
{
str[i] = alphaNum[rand() % (sizeof(alphaNum) - 1)];
}
str[len] = 0;
}
static void setArgsDefault()
{
memset(&g_dest, 0, sizeof(g_dest));
g_dest.sin_family = AF_INET;
g_dest.sin_addr.s_addr = inet_addr("127.0.0.1");
g_dest.sin_port = htons(12345);
bzero(&(g_dest.sin_zero), 8);
memset(&g_src, 0, sizeof(g_src));
g_src.sin_family = AF_INET;
g_src.sin_addr.s_addr = inet_addr("0.0.0.0");
g_src.sin_port = htons(7895);
bzero(&(g_src.sin_zero), 8);
times = 1;
}
static int process_arg(int argc, char *argv[])
{
int opt = 0;
int error = 0;
const char *optstring = "p:d:s:a:t:";
if (argc < 5)
{
DBG("Param info :-p dest_portid; -d dest_serverIP; -a src_portid; -s src_clientIP; -t times; \n");
return -1;
}
setArgsDefault();
while ((opt = getopt(argc, argv, optstring)) != -1)
{
switch (opt)
{
case 'p':
g_dest.sin_port = htons(atoi(optarg));
break;
case 'd':
g_dest.sin_addr.s_addr = inet_addr(optarg);
break;
case 's':
g_src.sin_addr.s_addr = inet_addr(optarg);
break;
case 'a':
g_src.sin_port = htons(atoi(optarg));
break;
case 't':
times = atoi(optarg);
break;
}
}
return 0;
}
int main(int argc, char *argv[])
{
int clientSocket, ret, i;
char sndbuffer[1024];
char rcvbuffer[1024];
int result = 0;
/*
* check command line arguments
*/
if (0 != process_arg(argc, argv))
{
DBG("Error in argument.%d\n", argc);
exit(1);
}
clientSocket = socket(AF_INET, SOCK_STREAM, 0);
if (clientSocket < 0)
{
DBG("Error in connection.\n");
exit(1);
}
DBG("[INFO]Client Socket is created.\n");
ret = bind(clientSocket, (struct sockaddr *) &g_src, sizeof(g_src));
if (ret < 0)
{
DBG("Error in binding.errno=%d\n", errno);
exit(1);
}
DBG("[INFO]Bind to client aaddress port 0\n");
ret = connect(clientSocket, (struct sockaddr *) &g_dest, sizeof(g_dest));
if (ret < 0)
{
DBG("Error in connection.\n");
exit(1);
}
DBG("[INFO]Connected to Server.\n");
memset(sndbuffer, '\0', 1024 * sizeof(char));
memset(rcvbuffer, '\0', 1024 * sizeof(char));
for (i = 1; i <= times; i++)
{
//DBG ("Client: \t");
random_str(sndbuffer, 50);
send(clientSocket, sndbuffer, strlen(sndbuffer), 0);
if (recv(clientSocket, rcvbuffer, 1024, 0) < 0)
{
DBG("Error in receiving data.\n");
}
else
{
//DBG ("Server: \t%s\n", rcvbuffer);
}
if (0 != strcmp(sndbuffer, rcvbuffer))
{
result = -1;
break;
}
}
/* Send exit message to server */
strcpy(sndbuffer, "#exit");
send(clientSocket, sndbuffer, strlen(sndbuffer), 0);
DBG("Result = %s\n", (result == 0) ? "Success" : "Fail");
close(clientSocket);
DBG("Disconnecting from server.\n");
return 0;
}
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