client.c

金浪ARM9开发板DEMO程序

/*
* client.c
*/

#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <error.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>

char *host_name ="192.168.10.100";//local host
int port = 8000;

void main(int argc,char *argv[]){
	char buf[8192];
	char message[256];
	int socket_descriptor;
	struct sockaddr_in pin;
	struct socet_descriptor;
	struct hostent *server_host_name;

	char *str = "A default test string";

	if(argc < 2){
		printf("Usage:'test\"Any test string\"\n");
		printf("we will send a default test string.\n");
	} else {
		str = argv[1];
	}
	if((server_host_name = gethostbyname(host_name)) == 0){
		perror("error resolving local host\n");
		exit(1);
	}
	
	bzero(&pin,sizeof(pin));
	pin.sin_family = AF_INET;
	pin.sin_addr.s_addr = htonl(INADDR_ANY);
	pin.sin_addr.s_addr = ((struct in_addr*)(server_host_name->
						h_addr))->s_addr;
	pin.sin_port = htons(port);
	if((socket_descriptor = socket(AF_INET,SOCK_STREAM,0))
					== -1){
	perror("error opening socket\n");
	exit(1);
	}
	if(connect(socket_descriptor,(void*)&pin,sizeof(pin)) == -1){
	perror("error connecting to socket\n");
	exit(1);
	}
	printf("Sending message %s to server...\n",str);
	
	if(send(socket_descriptor,str,strlen(str),0) == -1){
	perror("error in send\n");
	exit(1);
	}

	printf("...sent message...wait for response...\n");
	if(recv(socket_descriptor,buf,8192,0) == -1){
	perror("error in receiving response from server\n");
	exit(1);	
	}

	printf("\nResponse from server:\n\n%s\n",buf);

	close(socket_descriptor);
}