Disable the Nagle algorithm and send back responses in small chunks in an (8d1239c0) · Commits · CYBER - Cyber Security / TS 103 523 MSP / TLMSP / TLMSP curl

tests/server/sws.c

+25 −2

Original line number	Diff line number	Diff line
		@@ -55,6 +55,9 @@
		#ifdef HAVE_NETDB_H
		#include <netdb.h>
		#endif
		#ifdef HAVE_NETINET_TCP_H
		#include <netinet/tcp.h> /* for TCP_NODELAY */
		#endif

		#define ENABLE_CURLX_PRINTF
		/* make the curlx header define all printf() functions to use the curlx_*
		@@ -705,11 +708,20 @@ static int send_doc(curl_socket_t sock, struct httprequest *req)

		responsesize = count;
		do {
		written = swrite(sock, buffer, count);
		/* Ok, we send no more than 200 bytes at a time, just to make sure that
		larger chunks are split up so that the client will need to do multiple
		recv() calls to get it and thus we exercise that code better */
		int num = count;
		if(num > 200)
		num = 200;
		written = swrite(sock, buffer, num);
		if (written < 0) {
		logmsg("Sending response failed and we bailed out!");
		return -1;
		}
		else {
		logmsg("Sent off %d bytes", written);
		}
		/* write to file as well */
		fwrite(buffer, 1, written, dump);

		@@ -776,6 +788,7 @@ int main(int argc, char *argv[])
		#ifdef CURL_SWS_FORK_ENABLED
		bool use_fork = FALSE;
		#endif
		int opt;

		while(argc>arg) {
		if(!strcmp("--version", argv[arg])) {
		@@ -938,6 +951,16 @@ int main(int argc, char *argv[])
		#endif
		logmsg("====> Client connect");

		/*
		* Disable the Nagle algorithm to make it easier to send out a large
		* response in many small segments to torture the clients more.
		*/
		opt = 1;
		if (setsockopt(msgsock, IPPROTO_TCP, TCP_NODELAY,
		(void *)&opt, sizeof(opt)) == -1) {
		logmsg("====> TCP_NODELAY failed");
		}

		do {
		if(get_request(msgsock, &req))
		/* non-zero means error, break out of loop */