Respect remote MAX_FRAME_SIZE

bin/varnishd/http2/cache_http2.h

@@ -50,7 +50,12 @@ enum h2_stream_e {
 #define H2_FRAME_FLAGS(l,u,v)   extern const uint8_t H2FF_##u;
 #include "tbl/h2_frames.h"
 
-#define H2_SETTINGS_N			7
+enum h2setting {
+#define H2_SETTINGS(n,v,d) H2S_##n = v,
+#include "tbl/h2_settings.h"
+#undef H2_SETTINGS
+	H2_SETTINGS_N
+};
 
 struct h2_req {
 	unsigned			magic;

bin/varnishd/http2/cache_http2_deliver.c

@@ -44,7 +44,6 @@
 #include "../cache/cache_filter.h"
 #include "../cache/cache_transport.h"
 
-#include "../http1/cache_http1.h"
 #include "../http2/cache_http2.h"
 
 #include "vct.h"

bin/varnishd/http2/cache_http2_panic.c

@@ -47,8 +47,6 @@
 
 #include "vend.h"
 #include "vsb.h"
-#include "vtcp.h"
-#include "vtim.h"
 
 void
 h2_sess_panic(struct vsb *vsb, const struct sess *sp)

bin/varnishd/http2/cache_http2_proto.c

@@ -55,12 +55,6 @@ enum h2frame {
 #include "tbl/h2_frames.h"
 };
 
-enum h2setting {
-#define H2_SETTINGS(n,v,d) H2S_##n = v,
-#include "tbl/h2_settings.h"
-#undef H2_SETTINGS
-};
-
 static const char *
 h2_framename(enum h2frame h2f)
 {

bin/varnishd/http2/cache_http2_send.c

@@ -100,15 +100,36 @@ H2_Send(struct worker *wrk, struct h2_req *r2, int flush,
 {
 	int retval;
 	struct h2_sess *h2;
+	uint32_t mfs, tf;
+	const char *p;
 
 	(void)flush;
 
+	AN(ptr);
 	CHECK_OBJ_NOTNULL(r2, H2_REQ_MAGIC);
 	h2 = r2->h2sess;
 	CHECK_OBJ_NOTNULL(h2, H2_SESS_MAGIC);
 
 	Lck_Lock(&h2->sess->mtx);
-	retval = H2_Send_Frame(wrk, h2, type, flags, len, r2->stream, ptr);
+	mfs = h2->their_settings[H2S_MAX_FRAME_SIZE];
+	if (len < mfs) {
+		retval = H2_Send_Frame(wrk, h2,
+		    type, flags, len, r2->stream, ptr);
+	} else if (type == H2_FRAME_DATA) {
+		p = ptr;
+		do {
+			tf = mfs;
+			if (tf > len)
+				tf = len;
+			retval = H2_Send_Frame(wrk, h2, type,
+			    tf == len ? flags : 0,
+			    tf, r2->stream, p);
+			p += tf;
+			len -= tf;
+		} while (len > 0);
+	} else {
+		INCOMPL();
+	}
 	Lck_Unlock(&h2->sess->mtx);
 	return (retval);
 }