Socket.cxx File Reference

#include <cassert>
#include <fcntl.h>
#include <errno.h>
#include "rutil/compat.hxx"
#include "rutil/Socket.hxx"
#include "rutil/Logger.hxx"
#include <unistd.h>
#include <sys/resource.h>

Include dependency graph for Socket.cxx:

Go to the source code of this file.

Defines
#define	RESIPROCATE_SUBSYSTEM   Subsystem::TRANSPORT
Functions
static int	trySetRcvBuf (Socket fd, int buflen)
	Some OSs (Linux in particular) silently ignore requests to set too big and do not return an error code.

---

Define Documentation

#define RESIPROCATE_SUBSYSTEM   Subsystem::TRANSPORT

Definition at line 18 of file Socket.cxx.

---

Function Documentation

static int trySetRcvBuf	(	Socket	fd,
		int	buflen
	)		[static]

Some OSs (Linux in particular) silently ignore requests to set too big and do not return an error code.

Thus we always check. Also, the returned value (getsockopt) can be larger than the requested value (kernel internally doubles). manpage says sockopt uses integer as data-type If {buflen} is negative, we skip the set and just read Return the get size or -1 if the set didn't work

Definition at line 198 of file Socket.cxx.

Referenced by resip::setSocketRcvBufLen().

{
   if (buflen > 0)
   {
      int wbuflen = buflen;
#if !defined(WIN32)
      if (::setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &wbuflen, sizeof(wbuflen)) == -1)
#else
      if (::setsockopt (fd, SOL_SOCKET, SO_RCVBUF, (const char*)&wbuflen, sizeof(wbuflen)) == -1)
#endif
      {
         return -1;
      }
   }
   int rbuflen = 0;
   unsigned optlen = sizeof(rbuflen);
   if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, (char *)&rbuflen, (socklen_t *)&optlen) == -1)
   {
      return -1;
   }
   assert(optlen == sizeof(rbuflen));
   if (rbuflen < buflen)
   {
      return -1;
   }
   return rbuflen;
}