socket programming recv function

10-29-2001, 01:17 AM

on my lan 192.168.0.1 is running a webserver so when i wrote a simple socket application like

char buffer[32];
SOCKET sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
struct sockaddr_in * address= new (struct sockaddr_in);
address->sin_family=AF_INET;
address->sin_addr.s_addr=inet_addr("192.168.0.1");
address->sin_port=htons(80);
memset(address->sin_zero,'\0',8);
printf("connect %d \n",connect(sock,(struct sockaddr *)address,sizeof(*address)));
printf("%d ",send(sock,"GET /index.htm",14,0));
recv(sock,buffer,32,0);

till send everything is working fine but why i am not able to retreive the index.htm page back .

i have tried the same program on my linux box too but to no avail .what is the prob am i missing something ...

**Salem** · 10-29-2001, 03:04 AM

> printf("%d ",send(sock,"GET /index.htm",14,0));
Do you need to send a newline with this as well?

> recv(sock,buffer,32,0);
This doesn't know how much data will be returned, and in particular, it can return the data in fragments. It's up to you to reassemble the data into its proper form.

Code:

int n;
while ( (n=recv(sock,buffer,32,0)) > 0 ) {
    // do something with n bytes in buffer
}
if ( n == -1 ) {
    perror( "cant recv" );
}

10-29-2001, 03:39 AM

thanx it's working now ... i needed two new line characters ....

10-29-2001, 01:17 AM	#1
vicky Guest Posts: n/a	socket programming recv function on my lan 192.168.0.1 is running a webserver so when i wrote a simple socket application like char buffer[32]; SOCKET sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); struct sockaddr_in * address= new (struct sockaddr_in); address->sin_family=AF_INET; address->sin_addr.s_addr=inet_addr("192.168.0.1"); address->sin_port=htons(80); memset(address->sin_zero,'\0',8); printf("connect %d \n",connect(sock,(struct sockaddr )address,sizeof(address))); printf("%d ",send(sock,"GET /index.htm",14,0)); recv(sock,buffer,32,0); till send everything is working fine but why i am not able to retreive the index.htm page back . i have tried the same program on my linux box too but to no avail .what is the prob am i missing something ...

10-29-2001, 03:04 AM	#2
Salem and the hat of Jobseeking Join Date: Aug 2001 Location: The edge of the known universe Posts: 21,700	> printf("%d ",send(sock,"GET /index.htm",14,0)); Do you need to send a newline with this as well? > recv(sock,buffer,32,0); This doesn't know how much data will be returned, and in particular, it can return the data in fragments. It's up to you to reassemble the data into its proper form. Code: int n; while ( (n=recv(sock,buffer,32,0)) > 0 ) { // do something with n bytes in buffer } if ( n == -1 ) { perror( "cant recv" ); } __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Salem is offline

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10-29-2001, 03:39 AM	#3
vicky Guest Posts: n/a	thanx it's working now ... i needed two new line characters ....