GopherProxy

	Another hack for SO_LINGER in Linux. - geomyidae - A small C-based gopherd.
	git clone git://bitreich.org/geomyidae/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfri…
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	---
	commit 1908f14b2d4df2a0530fc4c7ca308220c89871c0
	parent 2c95cfddd2b4d2aca43bdcad09cdadd3214a10c9
	Author: Christoph Lohmann <[email protected]>
	Date: Sun, 18 Feb 2018 09:33:39 +0100

	Another hack for SO_LINGER in Linux.

	In case some connection stalled, wait 30 seconds until it is closed.
	DDoS is still possible, but that is not geomyidae's fault.

	Diffstat:
	M ind.c \| 40 ++++++++++++++++++++++++++++-…

	1 file changed, 36 insertions(+), 4 deletions(-)
	---
	diff --git a/ind.c b/ind.c
	@@ -57,12 +57,22 @@ filetype type[] = {
	int
	pendingbytes(int sock)
	{
	- int pending;
	+ int pending, rval;

	pending = 0;
	+ rval = 0;
	#ifdef TIOCOUTQ
	- ioctl(sock, TIOCOUTQ, &pending);
	+ rval = ioctl(sock, TIOCOUTQ, &pending);
	+#else
	+#ifdef SIOCOUTQ
	+ rval = ioctl(sock, SIOCOUTQ, &pending);
	#endif
	+#endif
	+
	+ if (rval != 0) {
	+ printf("rval = %d\n", rval);
	+ return 0;
	+ }

	return pending;
	}
	@@ -70,8 +80,30 @@ pendingbytes(int sock)
	void
	waitforpendingbytes(int sock)
	{
	- while (pendingbytes(sock) > 0)
	- usleep(10);
	+ int npending, opending, tries;
	+
	+ npending = opending = tries = 0;
	+
	+ /*
	+ * Wait until there is nothing pending or the connection stalled for
	+ * 30 seconds.
	+ */
	+ while ((npending = pendingbytes(sock)) > 0 && tries < 30000000) {
	+ if (opending != 0) {
	+ if (opending != npending) {
	+ tries = 0;
	+ } else {
	+ if (tries == 0) {
	+ tries = 1;
	+ } else {
	+ tries += tries;
	+ }
	+ }
	+ }
	+ opending = npending;
	+
	+ usleep(tries);
	+ }
	}

	int