[SOLVED] simple server in C recive probblem

end · 01-20-2020, 03:21 PM

Quote:

Is it really solved, though?

yes now its working to me. i only changed if(conn=accept...) to conn=accept. like we elaborate. Nothing else. check and working with netcat, like: nc 127.0.0.1 80

complite working code

SIMPLE SOCKET SERVER

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h> 
#include <sys/socket.h>
#include <netinet/in.h>
#include<arpa/inet.h>
#include <errno.h>
int main()
{
	int sockett,conn;
	char sndmsg[1024]="hi client";
	char rcvmsg[1024];
	struct sockaddr_in server, connstorage;
	int len;	
	int opt=1;
	
	
	sockett=socket(AF_INET,SOCK_STREAM,0);
	if(sockett<0)
	{
		printf("sock_create_probblem\n");
		printf("%d\n",errno);
                printf("err desc: %s\n",strerror(errno));
  
	}
	else
		printf("socket created\n");

	setsockopt(sockett,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt)    );
	

	server.sin_family=AF_INET;
	server.sin_port=htons(80);
	server.sin_addr.s_addr=inet_addr("127.0.0.1");
	
	

	if (bind(sockett,(struct sockaddr *) &server,sizeof(server)) != 0)
	{
		printf("Bind failed\n");
		printf("%d\n",errno);
                printf("err desc: %s\n",strerror(errno));

	
	}

	else
		printf("Bind success\n");
			
	

	if (listen(sockett,5) < 0)
	{
		printf("Listen failed\n");
	}

	else 
		printf("Listen success\n");	


	len=sizeof(connstorage);

       	
	conn=accept(sockett,(struct sockaddr *)&connstorage,&len);
	if(conn>0)
	{
		printf("Accepted\n");
	}
	else
		printf("Notaccepted\n");

	int rcv;
	rcv=recv(conn, rcvmsg, 1024,0 );
	if(rcv<0)
	{
		printf("RCV_PROBLLEM\n");
		printf("%d\n",errno);
		printf("err desc: %s\n",strerror(errno));
	}
	else
		printf("%s\n",rcvmsg);
	send(conn,sndmsg,sizeof(sndmsg),0);	
	

}

SIMPLE CLIENT

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include<arpa/inet.h> 
#include <fcntl.h>


int main(int argc , char *argv[]  )
{
	int sockett;
	struct sockaddr_in server;
	char buffer[1024];	
	char bufferr[1024]="hi server";	
	

	sockett=socket(AF_INET,SOCK_STREAM   ,0);

	

	server.sin_family=AF_INET;
	server.sin_port= htons(atoi(argv[2]));
	server.sin_addr.s_addr =inet_addr(argv[1]);	


	 int ret=-1;
	ret= connect(sockett, (struct sockaddr *)&server, sizeof(struct sockaddr_in));         

	if (sockett<0)
		printf("SOCKET ERROR\n");

	if (ret<0)
		printf("CONNECT ERROR\n\n");
		
	
	send(sockett,bufferr,1024,0);		
	recv(sockett, buffer, 1024, 0);
	printf("%s\n",buffer);
	
	
}