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[ale] IPv6 programming question



On Fri, 2007-11-02 at 10:14 +0530, Srikanth Pokkuluri wrote:
> 
> Hi All, 
> I have written client server program on linux using ipv6
> programming ... (stream sockets) 
> 
> But when  i am sending data ...The data is not been received at
> server .... please correct where the error is thanks 
> 
> int main() 
> { 
> int s,r; int ret; 
> uint16_t val=0; 
> char *buff; 
> struct sockaddr_in6 ser; 
> 
> s = socket(AF_INET6,SOCK_STREAM,PF_INET6); 
> if ( s <0) 
> 
>     perror ("socket 6 error"); 
> else 
>     /* ser.sin6_addr.s6_addr="fe02::1";  IN6ADDR_ANY_INIT; */ 
>     ser.sin6_port=htons(2000); 
>     ser.sin6_family=AF_INET6; 
>     ser.sin6_flowinfo=0; 
>     ser.sin6_scope_id=0; 
> 
> inet_pton(AF_INET6,"::1"/*IN6ADDR_LOOPBACK_INIT*/,&(ser.sin6_addr)); 
> buff = (char *) malloc (20* sizeof(char)); 
> strcpy(buff,"srikanth"); 
> ret = connect(s,(struct sockaddr*)&ser,sizeof(struct sockaddr_in6)); 
> if( ret <0) 
> perror ( " coonect error "); 
> else 
> r = send(s,buff,20,0); 
> if ( r <= 0) 
> perror ("send error"); 
> close(s); 
> 
> 
> 
> SERVER PROGRAM 
> int main() 
> { 
> int s,consd; int ret; 
> uint16_t val=0; 
> char buff[20]; 
> struct sockaddr_in6 ser,cli;  char ipAddr[128]; 
> socklen_t   t,clilen; 
> s = socket(AF_INET6,SOCK_STREAM,IPPROTO_TCP6); 
> if ( s <0) 
> 
>     perror ("socket 6 error"); 
> else 
>     ser.sin6_port=htons(2000); 
>     ser.sin6_family=AF_INET6; 
>     ser.sin6_flowinfo=0; 
>     ser.sin6_scope_id=0; 
> 
>   //inet_pton(AF_INET6,"fe80000000000000020795fffee4801f",&(ser.sin6_addr)); 
>     inet_pton(AF_INET6,"::1",&(ser.sin6_addr)); 
>     t = sizeof(struct sockaddr_in6); 
>     ret = bind(s,(struct sockaddr*)&ser,(struct sockaddr*)t); 
>     if( ret <0) 
> listen(s,5); 
> clilen = sizeof(struct sockaddr_in6); 
> memset(buff,'\0',sizeof(buff)); 
> ipAddr[0]='\0'; 
> 
> inet_ntop(int af, const void *src, char *dst, socklen_t cnt */ 

	I agree with what Jim pointed out.  What's up with the line above?

> 
> while(1) 
> { 
> printf("Server waiting :) \n\n "); 
> consd = accept(s,(struct sockaddr*)&cli,(socklen_t*)&(clilen)); 

	Accept returns the file descriptor to the accepted socket.

>         if( consd <-1 ) 
>             perror("accept error"); 
>         else 
>         { 
>         recv(s,buff,sizeof(buff),0); 

	You're doing a recv on the wrong socket.  You should be recv'ing on
consd.  Socket "s" is your listening socket.

>         printf("Received from client data =%s",buff); 
>         printf("Received from client port =%d",ntohs(cli.sin6_port)); 
>         break; 
>         } 
> } 
> close(s) 
> } 

> Thanks in advance 

	Mike
-- 
Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
   /\/\|=mhw=|\/\/          | (678) 463-0932 |  http://www.wittsend.com/mhw/
   NIC whois: MHW9          | An optimist believes we live in the best of all
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