[tproxy] [PATCH] [TPROXY] implementedIP_RECVORIGDSTADDRsocketoption

[Balazs Scheidler]

Hi,

You were right, sendto() wasn't working properly, but not because of my
last patch, it never really worked in IP_TRANSPARENT mode.

I've attached two patches I've just submitted to netdev, which should
solve your problem.

I'm Ccing the tproxy list as well.

On Mon, 2008-11-17 at 21:21 +0200, elyasaf wrote:
> You are right that in my isolate example was a bug
> Now I add transparenty and its continue to be "Invalid argument" (but
> without transparenty it work fine)
> Its some how really work before the patch, and I cant see any reason why,
> the patch seen clean and not related...
> 
> int main(int argc, char *argv[]) {
> 	char buf[5]="aaaa";
> 	struct sockaddr_in source,destination;
> 	source.sin_family = AF_INET;
> 	source.sin_addr.s_addr = inet_addr("10.0.0.26");
> 	source.sin_port = htons(INADDR_ANY);
> 
> 	destination.sin_family = AF_INET;
> 	destination.sin_port = htons(1500);
> 	destination.sin_addr.s_addr = inet_addr("10.0.0.2");
> 	send_to_transparenty(buf,4,&source,&destination);
> }
> 
> int send_to_transparenty(char *buf,int len,struct sockaddr_in *source,struct
> sockaddr_in *destination){
> 	int fd=socket(AF_INET, SOCK_DGRAM, 0);
> 	int flags=1;
> 	if (setsockopt(fd, SOL_IP,  IP_TRANSPARENT, &flags, sizeof(int)) ==
> -1){
> 		perror("destination-setsockopt()  IP_TRANSPARENT error!");
> 		return;
> 	}else{
> 		printf("destination-setsockopt IP_TRANSPARENT is OK...\n");
> 	}
> 	setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &flags, sizeof(flags));
> 	setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &flags, sizeof(flags)); 
> 	if(bind (fd, (struct sockaddr *) source,sizeof(*source))==-1){
> 		perror("destination-bind() error!");
> 		return;
> 	}
> 	flags=0;
> 	if(sendto(fd,buf,len,flags,(struct sockaddr
> *)destination,sizeof(*destination))==-1){
> 		perror("destination-sendto() error!");
> 		return;
> 	}
> 	close(fd);
> }
> 
> execve("./udpserver", ["./udpserver"], [/* 31 vars */]) = 0
> brk(0)                                  = 0x602000

-- 
Bazsi
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