changeset 5549:39d7eef2e332

SPDY: protocol implementation switched to spdy/3.1.
author Valentin Bartenev <vbart@nginx.com>
date Fri, 31 Jan 2014 19:17:26 +0400
parents 4d47722d76b2
children 3c5ddf0575d8
files src/http/ngx_http_spdy.c src/http/ngx_http_spdy.h src/http/ngx_http_spdy_filter_module.c src/http/ngx_http_spdy_module.c
diffstat 4 files changed, 820 insertions(+), 140 deletions(-) [+]
line wrap: on
line diff
--- a/src/http/ngx_http_spdy.c	Fri Jan 31 14:18:52 2014 +0400
+++ b/src/http/ngx_http_spdy.c	Fri Jan 31 19:17:26 2014 +0400
@@ -42,6 +42,8 @@
 
 #define ngx_spdy_frame_parse_sid(p)                                           \
     (ngx_spdy_frame_parse_uint32(p) & 0x7fffffff)
+#define ngx_spdy_frame_parse_delta(p)                                         \
+    (ngx_spdy_frame_parse_uint32(p) & 0x7fffffff)
 
 
 #define ngx_spdy_ctl_frame_check(h)                                           \
@@ -52,6 +54,7 @@
 #define ngx_spdy_ctl_frame_type(h)   ((h) & 0x000000ff)
 #define ngx_spdy_frame_flags(p)      ((p) >> 24)
 #define ngx_spdy_frame_length(p)     ((p) & 0x00ffffff)
+#define ngx_spdy_frame_id(p)         ((p) & 0x00ffffff)
 
 
 #define NGX_SPDY_SKIP_HEADERS_BUFFER_SIZE  4096
@@ -64,10 +67,21 @@
 #define NGX_SPDY_CANCEL                    5
 #define NGX_SPDY_INTERNAL_ERROR            6
 #define NGX_SPDY_FLOW_CONTROL_ERROR        7
+#define NGX_SPDY_STREAM_IN_USE             8
+#define NGX_SPDY_STREAM_ALREADY_CLOSED     9
+/* deprecated                              10 */
+#define NGX_SPDY_FRAME_TOO_LARGE           11
 
 #define NGX_SPDY_SETTINGS_MAX_STREAMS      4
+#define NGX_SPDY_SETTINGS_INIT_WINDOW      7
 
 #define NGX_SPDY_SETTINGS_FLAG_PERSIST     0x01
+#define NGX_SPDY_SETTINGS_FLAG_PERSISTED   0x02
+
+#define NGX_SPDY_MAX_WINDOW                NGX_MAX_INT32_VALUE
+#define NGX_SPDY_CONNECTION_WINDOW         65536
+#define NGX_SPDY_INIT_STREAM_WINDOW        65536
+#define NGX_SPDY_STREAM_WINDOW             NGX_SPDY_MAX_WINDOW
 
 typedef struct {
     ngx_uint_t    hash;
@@ -91,20 +105,20 @@
     u_char *pos, u_char *end);
 static u_char *ngx_http_spdy_state_headers_skip(ngx_http_spdy_connection_t *sc,
     u_char *pos, u_char *end);
+static u_char *ngx_http_spdy_state_window_update(ngx_http_spdy_connection_t *sc,
+    u_char *pos, u_char *end);
 static u_char *ngx_http_spdy_state_data(ngx_http_spdy_connection_t *sc,
     u_char *pos, u_char *end);
+static u_char *ngx_http_spdy_state_read_data(ngx_http_spdy_connection_t *sc,
+    u_char *pos, u_char *end);
 static u_char *ngx_http_spdy_state_rst_stream(ngx_http_spdy_connection_t *sc,
     u_char *pos, u_char *end);
 static u_char *ngx_http_spdy_state_ping(ngx_http_spdy_connection_t *sc,
     u_char *pos, u_char *end);
 static u_char *ngx_http_spdy_state_skip(ngx_http_spdy_connection_t *sc,
     u_char *pos, u_char *end);
-#if 0
 static u_char *ngx_http_spdy_state_settings(ngx_http_spdy_connection_t *sc,
     u_char *pos, u_char *end);
-#endif
-static u_char *ngx_http_spdy_state_noop(ngx_http_spdy_connection_t *sc,
-    u_char *pos, u_char *end);
 static u_char *ngx_http_spdy_state_complete(ngx_http_spdy_connection_t *sc,
     u_char *pos, u_char *end);
 static u_char *ngx_http_spdy_state_save(ngx_http_spdy_connection_t *sc,
@@ -114,6 +128,8 @@
 static u_char *ngx_http_spdy_state_internal_error(
     ngx_http_spdy_connection_t *sc);
 
+static ngx_int_t ngx_http_spdy_send_window_update(
+    ngx_http_spdy_connection_t *sc, ngx_uint_t sid, ngx_uint_t delta);
 static ngx_int_t ngx_http_spdy_send_rst_stream(ngx_http_spdy_connection_t *sc,
     ngx_uint_t sid, ngx_uint_t status, ngx_uint_t priority);
 static ngx_int_t ngx_http_spdy_send_settings(ngx_http_spdy_connection_t *sc);
@@ -138,13 +154,17 @@
 static ngx_int_t ngx_http_spdy_handle_request_header(ngx_http_request_t *r);
 static ngx_int_t ngx_http_spdy_parse_method(ngx_http_request_t *r);
 static ngx_int_t ngx_http_spdy_parse_scheme(ngx_http_request_t *r);
-static ngx_int_t ngx_http_spdy_parse_url(ngx_http_request_t *r);
+static ngx_int_t ngx_http_spdy_parse_host(ngx_http_request_t *r);
+static ngx_int_t ngx_http_spdy_parse_path(ngx_http_request_t *r);
 static ngx_int_t ngx_http_spdy_parse_version(ngx_http_request_t *r);
 
 static ngx_int_t ngx_http_spdy_construct_request_line(ngx_http_request_t *r);
 static void ngx_http_spdy_run_request(ngx_http_request_t *r);
 static ngx_int_t ngx_http_spdy_init_request_body(ngx_http_request_t *r);
 
+static ngx_int_t ngx_http_spdy_terminate_stream(ngx_http_spdy_connection_t *sc,
+    ngx_http_spdy_stream_t *stream, ngx_uint_t status);
+
 static void ngx_http_spdy_close_stream_handler(ngx_event_t *ev);
 
 static void ngx_http_spdy_handle_connection_handler(ngx_event_t *rev);
@@ -152,43 +172,202 @@
 static void ngx_http_spdy_finalize_connection(ngx_http_spdy_connection_t *sc,
     ngx_int_t rc);
 
+static ngx_int_t ngx_http_spdy_adjust_windows(ngx_http_spdy_connection_t *sc,
+    ssize_t delta);
+
 static void ngx_http_spdy_pool_cleanup(void *data);
 
 static void *ngx_http_spdy_zalloc(void *opaque, u_int items, u_int size);
 static void ngx_http_spdy_zfree(void *opaque, void *address);
 
 
-static const u_char ngx_http_spdy_dict[] =
-    "options" "get" "head" "post" "put" "delete" "trace"
-    "accept" "accept-charset" "accept-encoding" "accept-language"
-    "authorization" "expect" "from" "host"
-    "if-modified-since" "if-match" "if-none-match" "if-range"
-    "if-unmodifiedsince" "max-forwards" "proxy-authorization"
-    "range" "referer" "te" "user-agent"
-    "100" "101" "200" "201" "202" "203" "204" "205" "206"
-    "300" "301" "302" "303" "304" "305" "306" "307"
-    "400" "401" "402" "403" "404" "405" "406" "407" "408" "409" "410"
-    "411" "412" "413" "414" "415" "416" "417"
-    "500" "501" "502" "503" "504" "505"
-    "accept-ranges" "age" "etag" "location" "proxy-authenticate" "public"
-    "retry-after" "server" "vary" "warning" "www-authenticate" "allow"
-    "content-base" "content-encoding" "cache-control" "connection" "date"
-    "trailer" "transfer-encoding" "upgrade" "via" "warning"
-    "content-language" "content-length" "content-location"
-    "content-md5" "content-range" "content-type" "etag" "expires"
-    "last-modified" "set-cookie"
-    "Monday" "Tuesday" "Wednesday" "Thursday" "Friday" "Saturday" "Sunday"
-    "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"
-    "chunked" "text/html" "image/png" "image/jpg" "image/gif"
-    "application/xml" "application/xhtml" "text/plain" "public" "max-age"
-    "charset=iso-8859-1" "utf-8" "gzip" "deflate" "HTTP/1.1" "status"
-    "version" "url";
+static const u_char ngx_http_spdy_dict[] = {
+    0x00, 0x00, 0x00, 0x07, 0x6f, 0x70, 0x74, 0x69,   /* - - - - o p t i */
+    0x6f, 0x6e, 0x73, 0x00, 0x00, 0x00, 0x04, 0x68,   /* o n s - - - - h */
+    0x65, 0x61, 0x64, 0x00, 0x00, 0x00, 0x04, 0x70,   /* e a d - - - - p */
+    0x6f, 0x73, 0x74, 0x00, 0x00, 0x00, 0x03, 0x70,   /* o s t - - - - p */
+    0x75, 0x74, 0x00, 0x00, 0x00, 0x06, 0x64, 0x65,   /* u t - - - - d e */
+    0x6c, 0x65, 0x74, 0x65, 0x00, 0x00, 0x00, 0x05,   /* l e t e - - - - */
+    0x74, 0x72, 0x61, 0x63, 0x65, 0x00, 0x00, 0x00,   /* t r a c e - - - */
+    0x06, 0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x00,   /* - a c c e p t - */
+    0x00, 0x00, 0x0e, 0x61, 0x63, 0x63, 0x65, 0x70,   /* - - - a c c e p */
+    0x74, 0x2d, 0x63, 0x68, 0x61, 0x72, 0x73, 0x65,   /* t - c h a r s e */
+    0x74, 0x00, 0x00, 0x00, 0x0f, 0x61, 0x63, 0x63,   /* t - - - - a c c */
+    0x65, 0x70, 0x74, 0x2d, 0x65, 0x6e, 0x63, 0x6f,   /* e p t - e n c o */
+    0x64, 0x69, 0x6e, 0x67, 0x00, 0x00, 0x00, 0x0f,   /* d i n g - - - - */
+    0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x2d, 0x6c,   /* a c c e p t - l */
+    0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x00,   /* a n g u a g e - */
+    0x00, 0x00, 0x0d, 0x61, 0x63, 0x63, 0x65, 0x70,   /* - - - a c c e p */
+    0x74, 0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x73,   /* t - r a n g e s */
+    0x00, 0x00, 0x00, 0x03, 0x61, 0x67, 0x65, 0x00,   /* - - - - a g e - */
+    0x00, 0x00, 0x05, 0x61, 0x6c, 0x6c, 0x6f, 0x77,   /* - - - a l l o w */
+    0x00, 0x00, 0x00, 0x0d, 0x61, 0x75, 0x74, 0x68,   /* - - - - a u t h */
+    0x6f, 0x72, 0x69, 0x7a, 0x61, 0x74, 0x69, 0x6f,   /* o r i z a t i o */
+    0x6e, 0x00, 0x00, 0x00, 0x0d, 0x63, 0x61, 0x63,   /* n - - - - c a c */
+    0x68, 0x65, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72,   /* h e - c o n t r */
+    0x6f, 0x6c, 0x00, 0x00, 0x00, 0x0a, 0x63, 0x6f,   /* o l - - - - c o */
+    0x6e, 0x6e, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e,   /* n n e c t i o n */
+    0x00, 0x00, 0x00, 0x0c, 0x63, 0x6f, 0x6e, 0x74,   /* - - - - c o n t */
+    0x65, 0x6e, 0x74, 0x2d, 0x62, 0x61, 0x73, 0x65,   /* e n t - b a s e */
+    0x00, 0x00, 0x00, 0x10, 0x63, 0x6f, 0x6e, 0x74,   /* - - - - c o n t */
+    0x65, 0x6e, 0x74, 0x2d, 0x65, 0x6e, 0x63, 0x6f,   /* e n t - e n c o */
+    0x64, 0x69, 0x6e, 0x67, 0x00, 0x00, 0x00, 0x10,   /* d i n g - - - - */
+    0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d,   /* c o n t e n t - */
+    0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65,   /* l a n g u a g e */
+    0x00, 0x00, 0x00, 0x0e, 0x63, 0x6f, 0x6e, 0x74,   /* - - - - c o n t */
+    0x65, 0x6e, 0x74, 0x2d, 0x6c, 0x65, 0x6e, 0x67,   /* e n t - l e n g */
+    0x74, 0x68, 0x00, 0x00, 0x00, 0x10, 0x63, 0x6f,   /* t h - - - - c o */
+    0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x6c, 0x6f,   /* n t e n t - l o */
+    0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00,   /* c a t i o n - - */
+    0x00, 0x0b, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e,   /* - - c o n t e n */
+    0x74, 0x2d, 0x6d, 0x64, 0x35, 0x00, 0x00, 0x00,   /* t - m d 5 - - - */
+    0x0d, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74,   /* - c o n t e n t */
+    0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x00, 0x00,   /* - r a n g e - - */
+    0x00, 0x0c, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e,   /* - - c o n t e n */
+    0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x00, 0x00,   /* t - t y p e - - */
+    0x00, 0x04, 0x64, 0x61, 0x74, 0x65, 0x00, 0x00,   /* - - d a t e - - */
+    0x00, 0x04, 0x65, 0x74, 0x61, 0x67, 0x00, 0x00,   /* - - e t a g - - */
+    0x00, 0x06, 0x65, 0x78, 0x70, 0x65, 0x63, 0x74,   /* - - e x p e c t */
+    0x00, 0x00, 0x00, 0x07, 0x65, 0x78, 0x70, 0x69,   /* - - - - e x p i */
+    0x72, 0x65, 0x73, 0x00, 0x00, 0x00, 0x04, 0x66,   /* r e s - - - - f */
+    0x72, 0x6f, 0x6d, 0x00, 0x00, 0x00, 0x04, 0x68,   /* r o m - - - - h */
+    0x6f, 0x73, 0x74, 0x00, 0x00, 0x00, 0x08, 0x69,   /* o s t - - - - i */
+    0x66, 0x2d, 0x6d, 0x61, 0x74, 0x63, 0x68, 0x00,   /* f - m a t c h - */
+    0x00, 0x00, 0x11, 0x69, 0x66, 0x2d, 0x6d, 0x6f,   /* - - - i f - m o */
+    0x64, 0x69, 0x66, 0x69, 0x65, 0x64, 0x2d, 0x73,   /* d i f i e d - s */
+    0x69, 0x6e, 0x63, 0x65, 0x00, 0x00, 0x00, 0x0d,   /* i n c e - - - - */
+    0x69, 0x66, 0x2d, 0x6e, 0x6f, 0x6e, 0x65, 0x2d,   /* i f - n o n e - */
+    0x6d, 0x61, 0x74, 0x63, 0x68, 0x00, 0x00, 0x00,   /* m a t c h - - - */
+    0x08, 0x69, 0x66, 0x2d, 0x72, 0x61, 0x6e, 0x67,   /* - i f - r a n g */
+    0x65, 0x00, 0x00, 0x00, 0x13, 0x69, 0x66, 0x2d,   /* e - - - - i f - */
+    0x75, 0x6e, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69,   /* u n m o d i f i */
+    0x65, 0x64, 0x2d, 0x73, 0x69, 0x6e, 0x63, 0x65,   /* e d - s i n c e */
+    0x00, 0x00, 0x00, 0x0d, 0x6c, 0x61, 0x73, 0x74,   /* - - - - l a s t */
+    0x2d, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69, 0x65,   /* - m o d i f i e */
+    0x64, 0x00, 0x00, 0x00, 0x08, 0x6c, 0x6f, 0x63,   /* d - - - - l o c */
+    0x61, 0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00,   /* a t i o n - - - */
+    0x0c, 0x6d, 0x61, 0x78, 0x2d, 0x66, 0x6f, 0x72,   /* - m a x - f o r */
+    0x77, 0x61, 0x72, 0x64, 0x73, 0x00, 0x00, 0x00,   /* w a r d s - - - */
+    0x06, 0x70, 0x72, 0x61, 0x67, 0x6d, 0x61, 0x00,   /* - p r a g m a - */
+    0x00, 0x00, 0x12, 0x70, 0x72, 0x6f, 0x78, 0x79,   /* - - - p r o x y */
+    0x2d, 0x61, 0x75, 0x74, 0x68, 0x65, 0x6e, 0x74,   /* - a u t h e n t */
+    0x69, 0x63, 0x61, 0x74, 0x65, 0x00, 0x00, 0x00,   /* i c a t e - - - */
+    0x13, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2d, 0x61,   /* - p r o x y - a */
+    0x75, 0x74, 0x68, 0x6f, 0x72, 0x69, 0x7a, 0x61,   /* u t h o r i z a */
+    0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x05,   /* t i o n - - - - */
+    0x72, 0x61, 0x6e, 0x67, 0x65, 0x00, 0x00, 0x00,   /* r a n g e - - - */
+    0x07, 0x72, 0x65, 0x66, 0x65, 0x72, 0x65, 0x72,   /* - r e f e r e r */
+    0x00, 0x00, 0x00, 0x0b, 0x72, 0x65, 0x74, 0x72,   /* - - - - r e t r */
+    0x79, 0x2d, 0x61, 0x66, 0x74, 0x65, 0x72, 0x00,   /* y - a f t e r - */
+    0x00, 0x00, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65,   /* - - - s e r v e */
+    0x72, 0x00, 0x00, 0x00, 0x02, 0x74, 0x65, 0x00,   /* r - - - - t e - */
+    0x00, 0x00, 0x07, 0x74, 0x72, 0x61, 0x69, 0x6c,   /* - - - t r a i l */
+    0x65, 0x72, 0x00, 0x00, 0x00, 0x11, 0x74, 0x72,   /* e r - - - - t r */
+    0x61, 0x6e, 0x73, 0x66, 0x65, 0x72, 0x2d, 0x65,   /* a n s f e r - e */
+    0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x00,   /* n c o d i n g - */
+    0x00, 0x00, 0x07, 0x75, 0x70, 0x67, 0x72, 0x61,   /* - - - u p g r a */
+    0x64, 0x65, 0x00, 0x00, 0x00, 0x0a, 0x75, 0x73,   /* d e - - - - u s */
+    0x65, 0x72, 0x2d, 0x61, 0x67, 0x65, 0x6e, 0x74,   /* e r - a g e n t */
+    0x00, 0x00, 0x00, 0x04, 0x76, 0x61, 0x72, 0x79,   /* - - - - v a r y */
+    0x00, 0x00, 0x00, 0x03, 0x76, 0x69, 0x61, 0x00,   /* - - - - v i a - */
+    0x00, 0x00, 0x07, 0x77, 0x61, 0x72, 0x6e, 0x69,   /* - - - w a r n i */
+    0x6e, 0x67, 0x00, 0x00, 0x00, 0x10, 0x77, 0x77,   /* n g - - - - w w */
+    0x77, 0x2d, 0x61, 0x75, 0x74, 0x68, 0x65, 0x6e,   /* w - a u t h e n */
+    0x74, 0x69, 0x63, 0x61, 0x74, 0x65, 0x00, 0x00,   /* t i c a t e - - */
+    0x00, 0x06, 0x6d, 0x65, 0x74, 0x68, 0x6f, 0x64,   /* - - m e t h o d */
+    0x00, 0x00, 0x00, 0x03, 0x67, 0x65, 0x74, 0x00,   /* - - - - g e t - */
+    0x00, 0x00, 0x06, 0x73, 0x74, 0x61, 0x74, 0x75,   /* - - - s t a t u */
+    0x73, 0x00, 0x00, 0x00, 0x06, 0x32, 0x30, 0x30,   /* s - - - - 2 0 0 */
+    0x20, 0x4f, 0x4b, 0x00, 0x00, 0x00, 0x07, 0x76,   /* - O K - - - - v */
+    0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x00, 0x00,   /* e r s i o n - - */
+    0x00, 0x08, 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31,   /* - - H T T P - 1 */
+    0x2e, 0x31, 0x00, 0x00, 0x00, 0x03, 0x75, 0x72,   /* - 1 - - - - u r */
+    0x6c, 0x00, 0x00, 0x00, 0x06, 0x70, 0x75, 0x62,   /* l - - - - p u b */
+    0x6c, 0x69, 0x63, 0x00, 0x00, 0x00, 0x0a, 0x73,   /* l i c - - - - s */
+    0x65, 0x74, 0x2d, 0x63, 0x6f, 0x6f, 0x6b, 0x69,   /* e t - c o o k i */
+    0x65, 0x00, 0x00, 0x00, 0x0a, 0x6b, 0x65, 0x65,   /* e - - - - k e e */
+    0x70, 0x2d, 0x61, 0x6c, 0x69, 0x76, 0x65, 0x00,   /* p - a l i v e - */
+    0x00, 0x00, 0x06, 0x6f, 0x72, 0x69, 0x67, 0x69,   /* - - - o r i g i */
+    0x6e, 0x31, 0x30, 0x30, 0x31, 0x30, 0x31, 0x32,   /* n 1 0 0 1 0 1 2 */
+    0x30, 0x31, 0x32, 0x30, 0x32, 0x32, 0x30, 0x35,   /* 0 1 2 0 2 2 0 5 */
+    0x32, 0x30, 0x36, 0x33, 0x30, 0x30, 0x33, 0x30,   /* 2 0 6 3 0 0 3 0 */
+    0x32, 0x33, 0x30, 0x33, 0x33, 0x30, 0x34, 0x33,   /* 2 3 0 3 3 0 4 3 */
+    0x30, 0x35, 0x33, 0x30, 0x36, 0x33, 0x30, 0x37,   /* 0 5 3 0 6 3 0 7 */
+    0x34, 0x30, 0x32, 0x34, 0x30, 0x35, 0x34, 0x30,   /* 4 0 2 4 0 5 4 0 */
+    0x36, 0x34, 0x30, 0x37, 0x34, 0x30, 0x38, 0x34,   /* 6 4 0 7 4 0 8 4 */
+    0x30, 0x39, 0x34, 0x31, 0x30, 0x34, 0x31, 0x31,   /* 0 9 4 1 0 4 1 1 */
+    0x34, 0x31, 0x32, 0x34, 0x31, 0x33, 0x34, 0x31,   /* 4 1 2 4 1 3 4 1 */
+    0x34, 0x34, 0x31, 0x35, 0x34, 0x31, 0x36, 0x34,   /* 4 4 1 5 4 1 6 4 */
+    0x31, 0x37, 0x35, 0x30, 0x32, 0x35, 0x30, 0x34,   /* 1 7 5 0 2 5 0 4 */
+    0x35, 0x30, 0x35, 0x32, 0x30, 0x33, 0x20, 0x4e,   /* 5 0 5 2 0 3 - N */
+    0x6f, 0x6e, 0x2d, 0x41, 0x75, 0x74, 0x68, 0x6f,   /* o n - A u t h o */
+    0x72, 0x69, 0x74, 0x61, 0x74, 0x69, 0x76, 0x65,   /* r i t a t i v e */
+    0x20, 0x49, 0x6e, 0x66, 0x6f, 0x72, 0x6d, 0x61,   /* - I n f o r m a */
+    0x74, 0x69, 0x6f, 0x6e, 0x32, 0x30, 0x34, 0x20,   /* t i o n 2 0 4 - */
+    0x4e, 0x6f, 0x20, 0x43, 0x6f, 0x6e, 0x74, 0x65,   /* N o - C o n t e */
+    0x6e, 0x74, 0x33, 0x30, 0x31, 0x20, 0x4d, 0x6f,   /* n t 3 0 1 - M o */
+    0x76, 0x65, 0x64, 0x20, 0x50, 0x65, 0x72, 0x6d,   /* v e d - P e r m */
+    0x61, 0x6e, 0x65, 0x6e, 0x74, 0x6c, 0x79, 0x34,   /* a n e n t l y 4 */
+    0x30, 0x30, 0x20, 0x42, 0x61, 0x64, 0x20, 0x52,   /* 0 0 - B a d - R */
+    0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x34, 0x30,   /* e q u e s t 4 0 */
+    0x31, 0x20, 0x55, 0x6e, 0x61, 0x75, 0x74, 0x68,   /* 1 - U n a u t h */
+    0x6f, 0x72, 0x69, 0x7a, 0x65, 0x64, 0x34, 0x30,   /* o r i z e d 4 0 */
+    0x33, 0x20, 0x46, 0x6f, 0x72, 0x62, 0x69, 0x64,   /* 3 - F o r b i d */
+    0x64, 0x65, 0x6e, 0x34, 0x30, 0x34, 0x20, 0x4e,   /* d e n 4 0 4 - N */
+    0x6f, 0x74, 0x20, 0x46, 0x6f, 0x75, 0x6e, 0x64,   /* o t - F o u n d */
+    0x35, 0x30, 0x30, 0x20, 0x49, 0x6e, 0x74, 0x65,   /* 5 0 0 - I n t e */
+    0x72, 0x6e, 0x61, 0x6c, 0x20, 0x53, 0x65, 0x72,   /* r n a l - S e r */
+    0x76, 0x65, 0x72, 0x20, 0x45, 0x72, 0x72, 0x6f,   /* v e r - E r r o */
+    0x72, 0x35, 0x30, 0x31, 0x20, 0x4e, 0x6f, 0x74,   /* r 5 0 1 - N o t */
+    0x20, 0x49, 0x6d, 0x70, 0x6c, 0x65, 0x6d, 0x65,   /* - I m p l e m e */
+    0x6e, 0x74, 0x65, 0x64, 0x35, 0x30, 0x33, 0x20,   /* n t e d 5 0 3 - */
+    0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x20,   /* S e r v i c e - */
+    0x55, 0x6e, 0x61, 0x76, 0x61, 0x69, 0x6c, 0x61,   /* U n a v a i l a */
+    0x62, 0x6c, 0x65, 0x4a, 0x61, 0x6e, 0x20, 0x46,   /* b l e J a n - F */
+    0x65, 0x62, 0x20, 0x4d, 0x61, 0x72, 0x20, 0x41,   /* e b - M a r - A */
+    0x70, 0x72, 0x20, 0x4d, 0x61, 0x79, 0x20, 0x4a,   /* p r - M a y - J */
+    0x75, 0x6e, 0x20, 0x4a, 0x75, 0x6c, 0x20, 0x41,   /* u n - J u l - A */
+    0x75, 0x67, 0x20, 0x53, 0x65, 0x70, 0x74, 0x20,   /* u g - S e p t - */
+    0x4f, 0x63, 0x74, 0x20, 0x4e, 0x6f, 0x76, 0x20,   /* O c t - N o v - */
+    0x44, 0x65, 0x63, 0x20, 0x30, 0x30, 0x3a, 0x30,   /* D e c - 0 0 - 0 */
+    0x30, 0x3a, 0x30, 0x30, 0x20, 0x4d, 0x6f, 0x6e,   /* 0 - 0 0 - M o n */
+    0x2c, 0x20, 0x54, 0x75, 0x65, 0x2c, 0x20, 0x57,   /* - - T u e - - W */
+    0x65, 0x64, 0x2c, 0x20, 0x54, 0x68, 0x75, 0x2c,   /* e d - - T h u - */
+    0x20, 0x46, 0x72, 0x69, 0x2c, 0x20, 0x53, 0x61,   /* - F r i - - S a */
+    0x74, 0x2c, 0x20, 0x53, 0x75, 0x6e, 0x2c, 0x20,   /* t - - S u n - - */
+    0x47, 0x4d, 0x54, 0x63, 0x68, 0x75, 0x6e, 0x6b,   /* G M T c h u n k */
+    0x65, 0x64, 0x2c, 0x74, 0x65, 0x78, 0x74, 0x2f,   /* e d - t e x t - */
+    0x68, 0x74, 0x6d, 0x6c, 0x2c, 0x69, 0x6d, 0x61,   /* h t m l - i m a */
+    0x67, 0x65, 0x2f, 0x70, 0x6e, 0x67, 0x2c, 0x69,   /* g e - p n g - i */
+    0x6d, 0x61, 0x67, 0x65, 0x2f, 0x6a, 0x70, 0x67,   /* m a g e - j p g */
+    0x2c, 0x69, 0x6d, 0x61, 0x67, 0x65, 0x2f, 0x67,   /* - i m a g e - g */
+    0x69, 0x66, 0x2c, 0x61, 0x70, 0x70, 0x6c, 0x69,   /* i f - a p p l i */
+    0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x78,   /* c a t i o n - x */
+    0x6d, 0x6c, 0x2c, 0x61, 0x70, 0x70, 0x6c, 0x69,   /* m l - a p p l i */
+    0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x78,   /* c a t i o n - x */
+    0x68, 0x74, 0x6d, 0x6c, 0x2b, 0x78, 0x6d, 0x6c,   /* h t m l - x m l */
+    0x2c, 0x74, 0x65, 0x78, 0x74, 0x2f, 0x70, 0x6c,   /* - t e x t - p l */
+    0x61, 0x69, 0x6e, 0x2c, 0x74, 0x65, 0x78, 0x74,   /* a i n - t e x t */
+    0x2f, 0x6a, 0x61, 0x76, 0x61, 0x73, 0x63, 0x72,   /* - j a v a s c r */
+    0x69, 0x70, 0x74, 0x2c, 0x70, 0x75, 0x62, 0x6c,   /* i p t - p u b l */
+    0x69, 0x63, 0x70, 0x72, 0x69, 0x76, 0x61, 0x74,   /* i c p r i v a t */
+    0x65, 0x6d, 0x61, 0x78, 0x2d, 0x61, 0x67, 0x65,   /* e m a x - a g e */
+    0x3d, 0x67, 0x7a, 0x69, 0x70, 0x2c, 0x64, 0x65,   /* - g z i p - d e */
+    0x66, 0x6c, 0x61, 0x74, 0x65, 0x2c, 0x73, 0x64,   /* f l a t e - s d */
+    0x63, 0x68, 0x63, 0x68, 0x61, 0x72, 0x73, 0x65,   /* c h c h a r s e */
+    0x74, 0x3d, 0x75, 0x74, 0x66, 0x2d, 0x38, 0x63,   /* t - u t f - 8 c */
+    0x68, 0x61, 0x72, 0x73, 0x65, 0x74, 0x3d, 0x69,   /* h a r s e t - i */
+    0x73, 0x6f, 0x2d, 0x38, 0x38, 0x35, 0x39, 0x2d,   /* s o - 8 8 5 9 - */
+    0x31, 0x2c, 0x75, 0x74, 0x66, 0x2d, 0x2c, 0x2a,   /* 1 - u t f - - - */
+    0x2c, 0x65, 0x6e, 0x71, 0x3d, 0x30, 0x2e          /* - e n q - 0 -   */
+};
 
 
 static ngx_http_spdy_request_header_t ngx_http_spdy_request_headers[] = {
     { 0, 6, "method", ngx_http_spdy_parse_method },
     { 0, 6, "scheme", ngx_http_spdy_parse_scheme },
-    { 0, 3, "url", ngx_http_spdy_parse_url },
+    { 0, 4, "host", ngx_http_spdy_parse_host },
+    { 0, 4, "path", ngx_http_spdy_parse_path },
     { 0, 7, "version", ngx_http_spdy_parse_version },
 };
 
@@ -235,6 +414,11 @@
     sc->connection = c;
     sc->http_connection = hc;
 
+    sc->send_window = NGX_SPDY_CONNECTION_WINDOW;
+    sc->recv_window = NGX_SPDY_CONNECTION_WINDOW;
+
+    sc->init_window = NGX_SPDY_INIT_STREAM_WINDOW;
+
     sc->handler = ngx_http_spdy_state_head;
 
     sc->zstream_in.zalloc = ngx_http_spdy_zalloc;
@@ -302,6 +486,17 @@
         return;
     }
 
+    if (ngx_http_spdy_send_window_update(sc, 0, NGX_SPDY_MAX_WINDOW
+                                                - sc->recv_window)
+        == NGX_ERROR)
+    {
+        ngx_http_close_connection(c);
+        return;
+    }
+
+    sc->recv_window = NGX_SPDY_MAX_WINDOW;
+
+    ngx_queue_init(&sc->waiting);
     ngx_queue_init(&sc->posted);
 
     c->data = sc;
@@ -653,10 +848,7 @@
             return ngx_http_spdy_state_rst_stream(sc, pos, end);
 
         case NGX_SPDY_SETTINGS:
-            return ngx_http_spdy_state_skip(sc, pos, end);
-
-        case NGX_SPDY_NOOP:
-            return ngx_http_spdy_state_noop(sc, pos, end);
+            return ngx_http_spdy_state_settings(sc, pos, end);
 
         case NGX_SPDY_PING:
             return ngx_http_spdy_state_ping(sc, pos, end);
@@ -667,6 +859,9 @@
         case NGX_SPDY_HEADERS:
             return ngx_http_spdy_state_protocol_error(sc);
 
+        case NGX_SPDY_WINDOW_UPDATE:
+            return ngx_http_spdy_state_window_update(sc, pos, end);
+
         default: /* TODO logging */
             return ngx_http_spdy_state_skip(sc, pos, end);
         }
@@ -835,7 +1030,7 @@
                                             ngx_http_spdy_state_headers);
         }
 
-        sc->entries = ngx_spdy_frame_parse_uint16(buf->pos);
+        sc->entries = ngx_spdy_frame_parse_uint32(buf->pos);
 
         buf->pos += NGX_SPDY_NV_NUM_SIZE;
 
@@ -1053,9 +1248,220 @@
 
 
 static u_char *
+ngx_http_spdy_state_window_update(ngx_http_spdy_connection_t *sc, u_char *pos,
+    u_char *end)
+{
+    size_t                   delta;
+    ngx_uint_t               sid;
+    ngx_event_t             *wev;
+    ngx_queue_t             *q;
+    ngx_http_spdy_stream_t  *stream;
+
+    if (end - pos < NGX_SPDY_WINDOW_UPDATE_SIZE) {
+        return ngx_http_spdy_state_save(sc, pos, end,
+                                        ngx_http_spdy_state_window_update);
+    }
+
+    if (sc->length != NGX_SPDY_WINDOW_UPDATE_SIZE) {
+        ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
+                      "client sent WINDOW_UPDATE frame "
+                      "with incorrect length %uz", sc->length);
+
+        return ngx_http_spdy_state_protocol_error(sc);
+    }
+
+    sid = ngx_spdy_frame_parse_sid(pos);
+
+    pos += NGX_SPDY_SID_SIZE;
+
+    delta = ngx_spdy_frame_parse_delta(pos);
+
+    pos += NGX_SPDY_DELTA_SIZE;
+
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
+                   "spdy WINDOW_UPDATE sid:%ui delta:%ui", sid, delta);
+
+    if (sid) {
+        stream = ngx_http_spdy_get_stream_by_id(sc, sid);
+
+        if (stream == NULL) {
+            ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
+                          "client sent WINDOW_UPDATE frame "
+                          "for unknown stream %ui", sid);
+
+            if (ngx_http_spdy_send_rst_stream(sc, sid, NGX_SPDY_INVALID_STREAM,
+                                              NGX_SPDY_LOWEST_PRIORITY)
+                == NGX_ERROR)
+            {
+                return ngx_http_spdy_state_internal_error(sc);
+            }
+
+            return ngx_http_spdy_state_complete(sc, pos, end);
+        }
+
+        if (stream->send_window > (ssize_t) (NGX_SPDY_MAX_WINDOW - delta)) {
+
+            ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
+                          "client violated flow control for stream %ui: "
+                          "received WINDOW_UPDATE frame with delta %uz "
+                          "that is not allowed for window %z",
+                          sid, delta, stream->send_window);
+
+            if (ngx_http_spdy_terminate_stream(sc, stream,
+                                               NGX_SPDY_FLOW_CONTROL_ERROR)
+                == NGX_ERROR)
+            {
+                return ngx_http_spdy_state_internal_error(sc);
+            }
+
+            return ngx_http_spdy_state_complete(sc, pos, end);
+        }
+
+        stream->send_window += delta;
+
+        if (stream->exhausted) {
+            stream->exhausted = 0;
+
+            wev = stream->request->connection->write;
+
+            if (!wev->timer_set) {
+                wev->delayed = 0;
+                wev->handler(wev);
+            }
+        }
+
+    } else {
+        sc->send_window += delta;
+
+        if (sc->send_window > NGX_SPDY_MAX_WINDOW) {
+            ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
+                          "client violated connection flow control: "
+                          "received WINDOW_UPDATE frame with delta %uz "
+                          "that is not allowed for window %uz",
+                          delta, sc->send_window);
+
+            return ngx_http_spdy_state_protocol_error(sc);
+        }
+
+        while (!ngx_queue_empty(&sc->waiting)) {
+            q = ngx_queue_head(&sc->waiting);
+
+            ngx_queue_remove(q);
+
+            stream = ngx_queue_data(q, ngx_http_spdy_stream_t, queue);
+
+            stream->handled = 0;
+
+            wev = stream->request->connection->write;
+
+            if (!wev->timer_set) {
+                wev->delayed = 0;
+                wev->handler(wev);
+
+                if (sc->send_window == 0) {
+                    break;
+                }
+            }
+        }
+    }
+
+    return ngx_http_spdy_state_complete(sc, pos, end);
+}
+
+
+static u_char *
 ngx_http_spdy_state_data(ngx_http_spdy_connection_t *sc, u_char *pos,
     u_char *end)
 {
+    ngx_http_spdy_stream_t  *stream;
+
+    stream = sc->stream;
+
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
+                   "spdy DATA frame");
+
+    if (sc->length > sc->recv_window) {
+        ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
+                      "client violated connection flow control: length of "
+                      "received DATA frame %uz, while available window %uz",
+                      stream->id, sc->length, sc->recv_window);
+
+        return ngx_http_spdy_state_protocol_error(sc);
+    }
+
+    sc->recv_window -= sc->length;
+
+    if (sc->recv_window < NGX_SPDY_MAX_WINDOW / 4) {
+
+        if (ngx_http_spdy_send_window_update(sc, 0,
+                                             NGX_SPDY_MAX_WINDOW
+                                             - sc->recv_window)
+            == NGX_ERROR)
+        {
+            return ngx_http_spdy_state_internal_error(sc);
+        }
+
+        sc->recv_window = NGX_SPDY_MAX_WINDOW;
+    }
+
+    if (stream == NULL) {
+        return ngx_http_spdy_state_skip(sc, pos, end);
+    }
+
+    if (sc->length > stream->recv_window) {
+        ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
+                      "client violated flow control for stream %ui: length of "
+                      "received DATA frame %uz, while available window %uz",
+                      stream->id, sc->length, stream->recv_window);
+
+        if (ngx_http_spdy_terminate_stream(sc, stream,
+                                           NGX_SPDY_FLOW_CONTROL_ERROR)
+            == NGX_ERROR)
+        {
+            return ngx_http_spdy_state_internal_error(sc);
+        }
+
+        return ngx_http_spdy_state_skip(sc, pos, end);
+    }
+
+    stream->recv_window -= sc->length;
+
+    if (stream->recv_window < NGX_SPDY_STREAM_WINDOW / 4) {
+
+        if (ngx_http_spdy_send_window_update(sc, stream->id,
+                                             NGX_SPDY_STREAM_WINDOW
+                                             - stream->recv_window)
+            == NGX_ERROR)
+        {
+            return ngx_http_spdy_state_internal_error(sc);
+        }
+
+        stream->recv_window = NGX_SPDY_STREAM_WINDOW;
+    }
+
+    if (stream->in_closed) {
+        ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
+                      "client sent DATA frame for half closed stream %ui",
+                      stream->id);
+
+        if (ngx_http_spdy_terminate_stream(sc, stream,
+                                           NGX_SPDY_STREAM_ALREADY_CLOSED)
+            == NGX_ERROR)
+        {
+            return ngx_http_spdy_state_internal_error(sc);
+        }
+
+        return ngx_http_spdy_state_skip(sc, pos, end);
+    }
+
+    return ngx_http_spdy_state_read_data(sc, pos, end);
+}
+
+
+static u_char *
+ngx_http_spdy_state_read_data(ngx_http_spdy_connection_t *sc, u_char *pos,
+    u_char *end)
+{
     size_t                     size;
     ssize_t                    n;
     ngx_buf_t                 *buf;
@@ -1069,18 +1475,10 @@
 
     stream = sc->stream;
 
-    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
-                   "spdy DATA frame");
-
     if (stream == NULL) {
         return ngx_http_spdy_state_skip(sc, pos, end);
     }
 
-    if (stream->in_closed) {
-        /* TODO log */
-        return ngx_http_spdy_state_protocol_error(sc);
-    }
-
     if (stream->skip_data) {
 
         if (sc->flags & NGX_SPDY_FLAG_FIN) {
@@ -1171,7 +1569,7 @@
 
     if (!complete) {
         return ngx_http_spdy_state_save(sc, pos, end,
-                                        ngx_http_spdy_state_data);
+                                        ngx_http_spdy_state_read_data);
     }
 
     if (sc->flags & NGX_SPDY_FLAG_FIN) {
@@ -1357,12 +1755,12 @@
 }
 
 
-#if 0
-
 static u_char *
 ngx_http_spdy_state_settings(ngx_http_spdy_connection_t *sc, u_char *pos,
     u_char *end)
 {
+    ngx_uint_t  fid, val;
+
     if (sc->entries == 0) {
 
         if (end - pos < NGX_SPDY_SETTINGS_NUM_SIZE) {
@@ -1392,24 +1790,46 @@
         }
 
         sc->entries--;
-
-        pos += NGX_SPDY_SETTINGS_PAIR_SIZE;
         sc->length -= NGX_SPDY_SETTINGS_PAIR_SIZE;
-    }
-
-    return ngx_http_spdy_state_complete(sc, pos, end);
-}
-
-#endif
-
-
-static u_char *
-ngx_http_spdy_state_noop(ngx_http_spdy_connection_t *sc, u_char *pos,
-    u_char *end)
-{
-    if (sc->length) {
-        /* TODO logging */
-        return ngx_http_spdy_state_protocol_error(sc);
+
+        fid = ngx_spdy_frame_parse_uint32(pos);
+
+        pos += NGX_SPDY_SETTINGS_FID_SIZE;
+
+        val = ngx_spdy_frame_parse_uint32(pos);
+
+        pos += NGX_SPDY_SETTINGS_VAL_SIZE;
+
+        ngx_log_debug3(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
+                       "spdy SETTINGS entry fl:%ui id:%ui val:%ui",
+                       ngx_spdy_frame_flags(fid), ngx_spdy_frame_id(fid), val);
+
+        if (ngx_spdy_frame_flags(fid) == NGX_SPDY_SETTINGS_FLAG_PERSISTED) {
+            continue;
+        }
+
+        switch (ngx_spdy_frame_id(fid)) {
+
+        case NGX_SPDY_SETTINGS_INIT_WINDOW:
+
+            if (val > NGX_SPDY_MAX_WINDOW) {
+                ngx_log_error(NGX_LOG_INFO, sc->connection->log, 0,
+                              "client sent SETTINGS frame with "
+                              "incorrect INIT_WINDOW value: %ui", val);
+
+                return ngx_http_spdy_state_protocol_error(sc);
+            }
+
+            if (ngx_http_spdy_adjust_windows(sc, val - sc->init_window)
+                != NGX_OK)
+            {
+                return ngx_http_spdy_state_internal_error(sc);
+            }
+
+            sc->init_window = val;
+
+            continue;
+        }
     }
 
     return ngx_http_spdy_state_complete(sc, pos, end);
@@ -1473,6 +1893,41 @@
 
 
 static ngx_int_t
+ngx_http_spdy_send_window_update(ngx_http_spdy_connection_t *sc, ngx_uint_t sid,
+    ngx_uint_t delta)
+{
+    u_char                     *p;
+    ngx_buf_t                  *buf;
+    ngx_http_spdy_out_frame_t  *frame;
+
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
+                   "spdy write WINDOW_UPDATE sid:%ui delta:%ui", sid, delta);
+
+    frame = ngx_http_spdy_get_ctl_frame(sc, NGX_SPDY_WINDOW_UPDATE_SIZE,
+                                        NGX_SPDY_HIGHEST_PRIORITY);
+    if (frame == NULL) {
+        return NGX_ERROR;
+    }
+
+    buf = frame->first->buf;
+
+    p = buf->pos;
+
+    p = ngx_spdy_frame_write_head(p, NGX_SPDY_WINDOW_UPDATE);
+    p = ngx_spdy_frame_write_flags_and_len(p, 0, NGX_SPDY_WINDOW_UPDATE_SIZE);
+
+    p = ngx_spdy_frame_write_sid(p, sid);
+    p = ngx_spdy_frame_aligned_write_uint32(p, delta);
+
+    buf->last = p;
+
+    ngx_http_spdy_queue_frame(sc, frame);
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
 ngx_http_spdy_send_rst_stream(ngx_http_spdy_connection_t *sc, ngx_uint_t sid,
     ngx_uint_t status, ngx_uint_t priority)
 {
@@ -1570,7 +2025,7 @@
 
     buf = ngx_create_temp_buf(sc->pool, NGX_SPDY_FRAME_HEADER_SIZE
                                         + NGX_SPDY_SETTINGS_NUM_SIZE
-                                        + NGX_SPDY_SETTINGS_PAIR_SIZE);
+                                        + 2 * NGX_SPDY_SETTINGS_PAIR_SIZE);
     if (buf == NULL) {
         return NGX_ERROR;
     }
@@ -1585,7 +2040,8 @@
     frame->handler = ngx_http_spdy_settings_frame_handler;
     frame->stream = NULL;
 #if (NGX_DEBUG)
-    frame->length = NGX_SPDY_SETTINGS_NUM_SIZE + NGX_SPDY_SETTINGS_PAIR_SIZE;
+    frame->length = NGX_SPDY_SETTINGS_NUM_SIZE
+                    + 2 * NGX_SPDY_SETTINGS_PAIR_SIZE;
 #endif
     frame->priority = NGX_SPDY_HIGHEST_PRIORITY;
     frame->blocked = 0;
@@ -1594,18 +2050,20 @@
 
     p = ngx_spdy_frame_write_head(p, NGX_SPDY_SETTINGS);
     p = ngx_spdy_frame_write_flags_and_len(p, NGX_SPDY_FLAG_CLEAR_SETTINGS,
-                                              NGX_SPDY_SETTINGS_NUM_SIZE
-                                              + NGX_SPDY_SETTINGS_PAIR_SIZE);
-
-    p = ngx_spdy_frame_aligned_write_uint32(p, 1);
-    p = ngx_spdy_frame_aligned_write_uint32(p,
-                                          NGX_SPDY_SETTINGS_MAX_STREAMS << 24);
+                                           NGX_SPDY_SETTINGS_NUM_SIZE
+                                           + 2 * NGX_SPDY_SETTINGS_PAIR_SIZE);
+
+    p = ngx_spdy_frame_aligned_write_uint32(p, 2);
 
     sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
                                         ngx_http_spdy_module);
 
+    p = ngx_spdy_frame_write_flags_and_id(p, 0, NGX_SPDY_SETTINGS_MAX_STREAMS);
     p = ngx_spdy_frame_aligned_write_uint32(p, sscf->concurrent_streams);
 
+    p = ngx_spdy_frame_write_flags_and_id(p, 0, NGX_SPDY_SETTINGS_INIT_WINDOW);
+    p = ngx_spdy_frame_aligned_write_uint32(p, NGX_SPDY_STREAM_WINDOW);
+
     buf->last = p;
 
     ngx_http_spdy_queue_frame(sc, frame);
@@ -1820,6 +2278,10 @@
     stream->id = id;
     stream->request = r;
     stream->connection = sc;
+
+    stream->send_window = sc->init_window;
+    stream->recv_window = NGX_SPDY_STREAM_WINDOW;
+
     stream->priority = priority;
 
     sscf = ngx_http_get_module_srv_conf(r, ngx_http_spdy_module);
@@ -1886,7 +2348,7 @@
             return NGX_AGAIN;
         }
 
-        len = ngx_spdy_frame_parse_uint16(p);
+        len = ngx_spdy_frame_parse_uint32(p);
 
         if (!len) {
             return NGX_HTTP_PARSE_INVALID_HEADER;
@@ -1915,6 +2377,11 @@
 
         r->header_name_start = p;
 
+        if (p[0] == ':') {
+            r->lowcase_index--;
+            p++;
+        }
+
         hash = 0;
 
         for ( /* void */ ; p != r->header_name_end; p++) {
@@ -1958,7 +2425,7 @@
             break;
         }
 
-        len = ngx_spdy_frame_parse_uint16(p);
+        len = ngx_spdy_frame_parse_uint32(p);
 
         /* null-terminate header name */
         *p = '\0';
@@ -2093,13 +2560,15 @@
             return NGX_OK;
         }
 
-    } else {
+    }
+
+    if (r->header_name_start[0] == ':') {
         for (i = 0; i < NGX_SPDY_REQUEST_HEADERS; i++) {
             sh = &ngx_http_spdy_request_headers[i];
 
             if (sh->hash != r->header_hash
                 || sh->len != r->lowcase_index
-                || ngx_strncmp(sh->header, r->header_name_start,
+                || ngx_strncmp(sh->header, &r->header_name_start[1],
                                r->lowcase_index)
                    != 0)
             {
@@ -2108,6 +2577,8 @@
 
             return sh->handler(r);
         }
+
+        return NGX_HTTP_PARSE_INVALID_REQUEST;
     }
 
     h = ngx_list_push(&r->headers_in.headers);
@@ -2243,7 +2714,39 @@
 
 
 static ngx_int_t
-ngx_http_spdy_parse_url(ngx_http_request_t *r)
+ngx_http_spdy_parse_host(ngx_http_request_t *r)
+{
+    ngx_table_elt_t  *h;
+
+    if (r->headers_in.host) {
+        return NGX_HTTP_PARSE_INVALID_HEADER;
+    }
+
+    h = ngx_list_push(&r->headers_in.headers);
+    if (h == NULL) {
+        ngx_http_spdy_close_stream(r->spdy_stream,
+                                   NGX_HTTP_INTERNAL_SERVER_ERROR);
+        return NGX_ERROR;
+    }
+
+    r->headers_in.host = h;
+
+    h->hash = r->header_hash;
+
+    h->key.len = r->lowcase_index;
+    h->key.data = &r->header_name_start[1];
+
+    h->value.len = r->header_size;
+    h->value.data = r->header_start;
+
+    h->lowcase_key = h->key.data;
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_http_spdy_parse_path(ngx_http_request_t *r)
 {
     if (r->unparsed_uri.len) {
         return NGX_HTTP_PARSE_INVALID_HEADER;
@@ -2560,6 +3063,32 @@
 }
 
 
+static ngx_int_t
+ngx_http_spdy_terminate_stream(ngx_http_spdy_connection_t *sc,
+    ngx_http_spdy_stream_t *stream, ngx_uint_t status)
+{
+    ngx_event_t       *rev;
+    ngx_connection_t  *fc;
+
+    if (ngx_http_spdy_send_rst_stream(sc, stream->id, status,
+                                      NGX_SPDY_HIGHEST_PRIORITY)
+        == NGX_ERROR)
+    {
+        return NGX_ERROR;
+    }
+
+    stream->out_closed = 1;
+
+    fc = stream->request->connection;
+    fc->error = 1;
+
+    rev = fc->read;
+    rev->handler(rev);
+
+    return NGX_OK;
+}
+
+
 static void
 ngx_http_spdy_close_stream_handler(ngx_event_t *ev)
 {
@@ -2591,11 +3120,6 @@
                    "spdy close stream %ui, queued %ui, processing %ui",
                    stream->id, stream->queued, sc->processing);
 
-    if (stream->handled) {
-        stream->handled = 0;
-        ngx_queue_remove(&stream->queue);
-    }
-
     fc = stream->request->connection;
 
     if (stream->queued) {
@@ -2838,6 +3362,61 @@
 }
 
 
+static ngx_int_t
+ngx_http_spdy_adjust_windows(ngx_http_spdy_connection_t *sc, ssize_t delta)
+{
+    ngx_uint_t                 i, size;
+    ngx_event_t               *wev;
+    ngx_http_spdy_stream_t    *stream, *sn;
+    ngx_http_spdy_srv_conf_t  *sscf;
+
+    sscf = ngx_http_get_module_srv_conf(sc->http_connection->conf_ctx,
+                                        ngx_http_spdy_module);
+
+    size = ngx_http_spdy_streams_index_size(sscf);
+
+    for (i = 0; i < size; i++) {
+
+        for (stream = sc->streams_index[i]; stream; stream = sn) {
+            sn = stream->index;
+
+            if (delta > 0
+                && stream->send_window
+                      > (ssize_t) (NGX_SPDY_MAX_WINDOW - delta))
+            {
+                if (ngx_http_spdy_terminate_stream(sc, stream,
+                                                   NGX_SPDY_FLOW_CONTROL_ERROR)
+                    == NGX_ERROR)
+                {
+                    return NGX_ERROR;
+                }
+
+                continue;
+            }
+
+            stream->send_window += delta;
+
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, sc->connection->log, 0,
+                           "spdy:%ui adjust window:%z",
+                           stream->id, stream->send_window);
+
+            if (stream->send_window > 0 && stream->exhausted) {
+                stream->exhausted = 0;
+
+                wev = stream->request->connection->write;
+
+                if (!wev->timer_set) {
+                    wev->delayed = 0;
+                    wev->handler(wev);
+                }
+            }
+        }
+    }
+
+    return NGX_OK;
+}
+
+
 static void
 ngx_http_spdy_pool_cleanup(void *data)
 {
--- a/src/http/ngx_http_spdy.h	Fri Jan 31 14:18:52 2014 +0400
+++ b/src/http/ngx_http_spdy.h	Fri Jan 31 19:17:26 2014 +0400
@@ -15,10 +15,10 @@
 #include <zlib.h>
 
 
-#define NGX_SPDY_VERSION              2
+#define NGX_SPDY_VERSION              3
 
-#define NGX_SPDY_NPN_ADVERTISE        "\x06spdy/2"
-#define NGX_SPDY_NPN_NEGOTIATED       "spdy/2"
+#define NGX_SPDY_NPN_ADVERTISE        "\x08spdy/3.1"
+#define NGX_SPDY_NPN_NEGOTIATED       "spdy/3.1"
 
 #define NGX_SPDY_STATE_BUFFER_SIZE    16
 
@@ -28,32 +28,34 @@
 #define NGX_SPDY_SYN_REPLY            2
 #define NGX_SPDY_RST_STREAM           3
 #define NGX_SPDY_SETTINGS             4
-#define NGX_SPDY_NOOP                 5
 #define NGX_SPDY_PING                 6
 #define NGX_SPDY_GOAWAY               7
 #define NGX_SPDY_HEADERS              8
+#define NGX_SPDY_WINDOW_UPDATE        9
 
 #define NGX_SPDY_FRAME_HEADER_SIZE    8
 
 #define NGX_SPDY_SID_SIZE             4
+#define NGX_SPDY_DELTA_SIZE           4
 
 #define NGX_SPDY_SYN_STREAM_SIZE      10
-#define NGX_SPDY_SYN_REPLY_SIZE       6
+#define NGX_SPDY_SYN_REPLY_SIZE       4
 #define NGX_SPDY_RST_STREAM_SIZE      8
 #define NGX_SPDY_PING_SIZE            4
-#define NGX_SPDY_GOAWAY_SIZE          4
-#define NGX_SPDY_NV_NUM_SIZE          2
-#define NGX_SPDY_NV_NLEN_SIZE         2
-#define NGX_SPDY_NV_VLEN_SIZE         2
+#define NGX_SPDY_GOAWAY_SIZE          8
+#define NGX_SPDY_WINDOW_UPDATE_SIZE   8
+#define NGX_SPDY_NV_NUM_SIZE          4
+#define NGX_SPDY_NV_NLEN_SIZE         4
+#define NGX_SPDY_NV_VLEN_SIZE         4
 #define NGX_SPDY_SETTINGS_NUM_SIZE    4
-#define NGX_SPDY_SETTINGS_IDF_SIZE    4
+#define NGX_SPDY_SETTINGS_FID_SIZE    4
 #define NGX_SPDY_SETTINGS_VAL_SIZE    4
 
 #define NGX_SPDY_SETTINGS_PAIR_SIZE                                           \
-    (NGX_SPDY_SETTINGS_IDF_SIZE + NGX_SPDY_SETTINGS_VAL_SIZE)
+    (NGX_SPDY_SETTINGS_FID_SIZE + NGX_SPDY_SETTINGS_VAL_SIZE)
 
 #define NGX_SPDY_HIGHEST_PRIORITY     0
-#define NGX_SPDY_LOWEST_PRIORITY      3
+#define NGX_SPDY_LOWEST_PRIORITY      7
 
 #define NGX_SPDY_FLAG_FIN             0x01
 #define NGX_SPDY_FLAG_UNIDIRECTIONAL  0x02
@@ -79,6 +81,12 @@
 
     ngx_uint_t                       processing;
 
+    size_t                           send_window;
+    size_t                           recv_window;
+    size_t                           init_window;
+
+    ngx_queue_t                      waiting;
+
     u_char                           buffer[NGX_SPDY_STATE_BUFFER_SIZE];
     size_t                           buffer_used;
     ngx_http_spdy_handler_pt         handler;
@@ -119,15 +127,23 @@
     ngx_uint_t                       header_buffers;
     ngx_uint_t                       queued;
 
+    /*
+     * A change to SETTINGS_INITIAL_WINDOW_SIZE could cause the
+     * send_window to become negative, hence it's signed.
+     */
+    ssize_t                          send_window;
+    size_t                           recv_window;
+
     ngx_http_spdy_out_frame_t       *free_frames;
     ngx_chain_t                     *free_data_headers;
     ngx_chain_t                     *free_bufs;
 
     ngx_queue_t                      queue;
 
-    unsigned                         priority:2;
+    unsigned                         priority:3;
     unsigned                         handled:1;
     unsigned                         blocked:1;
+    unsigned                         exhausted:1;
     unsigned                         in_closed:1;
     unsigned                         out_closed:1;
     unsigned                         skip_data:2;
@@ -230,7 +246,10 @@
 
 #define ngx_spdy_frame_write_flags_and_len(p, f, l)                           \
     ngx_spdy_frame_aligned_write_uint32(p, (f) << 24 | (l))
+#define ngx_spdy_frame_write_flags_and_id(p, f, i)                            \
+    ngx_spdy_frame_aligned_write_uint32(p, (f) << 24 | (i))
 
-#define ngx_spdy_frame_write_sid  ngx_spdy_frame_aligned_write_uint32
+#define ngx_spdy_frame_write_sid     ngx_spdy_frame_aligned_write_uint32
+#define ngx_spdy_frame_write_window  ngx_spdy_frame_aligned_write_uint32
 
 #endif /* _NGX_HTTP_SPDY_H_INCLUDED_ */
--- a/src/http/ngx_http_spdy_filter_module.c	Fri Jan 31 14:18:52 2014 +0400
+++ b/src/http/ngx_http_spdy_filter_module.c	Fri Jan 31 19:17:26 2014 +0400
@@ -17,9 +17,9 @@
 #define ngx_http_spdy_nv_nsize(h)  (NGX_SPDY_NV_NLEN_SIZE + sizeof(h) - 1)
 #define ngx_http_spdy_nv_vsize(h)  (NGX_SPDY_NV_VLEN_SIZE + sizeof(h) - 1)
 
-#define ngx_http_spdy_nv_write_num   ngx_spdy_frame_write_uint16
-#define ngx_http_spdy_nv_write_nlen  ngx_spdy_frame_write_uint16
-#define ngx_http_spdy_nv_write_vlen  ngx_spdy_frame_write_uint16
+#define ngx_http_spdy_nv_write_num   ngx_spdy_frame_write_uint32
+#define ngx_http_spdy_nv_write_nlen  ngx_spdy_frame_write_uint32
+#define ngx_http_spdy_nv_write_vlen  ngx_spdy_frame_write_uint32
 
 #define ngx_http_spdy_nv_write_name(p, h)                                     \
     ngx_cpymem(ngx_http_spdy_nv_write_nlen(p, sizeof(h) - 1), h, sizeof(h) - 1)
@@ -33,6 +33,10 @@
 
 static ngx_inline ngx_int_t ngx_http_spdy_filter_send(
     ngx_connection_t *fc, ngx_http_spdy_stream_t *stream);
+static ngx_inline ngx_int_t ngx_http_spdy_flow_control(
+    ngx_http_spdy_connection_t *sc, ngx_http_spdy_stream_t *stream);
+static void ngx_http_spdy_waiting_queue(ngx_http_spdy_connection_t *sc,
+    ngx_http_spdy_stream_t *stream);
 
 static ngx_chain_t *ngx_http_spdy_filter_get_shadow(
     ngx_http_spdy_stream_t *stream, ngx_buf_t *buf, off_t offset, off_t size);
@@ -162,9 +166,9 @@
     }
 
     len = NGX_SPDY_NV_NUM_SIZE
-          + ngx_http_spdy_nv_nsize("version")
+          + ngx_http_spdy_nv_nsize(":version")
           + ngx_http_spdy_nv_vsize("HTTP/1.1")
-          + ngx_http_spdy_nv_nsize("status")
+          + ngx_http_spdy_nv_nsize(":status")
           + (r->headers_out.status_line.len
              ? NGX_SPDY_NV_VLEN_SIZE + r->headers_out.status_line.len
              : ngx_http_spdy_nv_vsize("418"));
@@ -305,10 +309,10 @@
 
     last = buf + NGX_SPDY_NV_NUM_SIZE;
 
-    last = ngx_http_spdy_nv_write_name(last, "version");
+    last = ngx_http_spdy_nv_write_name(last, ":version");
     last = ngx_http_spdy_nv_write_val(last, "HTTP/1.1");
 
-    last = ngx_http_spdy_nv_write_name(last, "status");
+    last = ngx_http_spdy_nv_write_name(last, ":status");
 
     if (r->headers_out.status_line.len) {
         last = ngx_http_spdy_nv_write_vlen(last,
@@ -457,17 +461,6 @@
             continue;
         }
 
-        if ((header[i].key.len == 6
-             && ngx_strncasecmp(header[i].key.data,
-                                (u_char *) "status", 6) == 0)
-            || (header[i].key.len == 7
-                && ngx_strncasecmp(header[i].key.data,
-                                   (u_char *) "version", 7) == 0))
-        {
-            header[i].hash = 0;
-            continue;
-        }
-
         last = ngx_http_spdy_nv_write_nlen(last, header[i].key.len);
 
         ngx_strlow(last, header[i].key.data, header[i].key.len);
@@ -620,13 +613,14 @@
 static ngx_chain_t *
 ngx_http_spdy_send_chain(ngx_connection_t *fc, ngx_chain_t *in, off_t limit)
 {
-    off_t                       size, offset;
-    size_t                      rest, frame_size;
-    ngx_chain_t                *cl, *out, **ln;
-    ngx_http_request_t         *r;
-    ngx_http_spdy_stream_t     *stream;
-    ngx_http_spdy_loc_conf_t   *slcf;
-    ngx_http_spdy_out_frame_t  *frame;
+    off_t                        size, offset;
+    size_t                       rest, frame_size;
+    ngx_chain_t                 *cl, *out, **ln;
+    ngx_http_request_t          *r;
+    ngx_http_spdy_stream_t      *stream;
+    ngx_http_spdy_loc_conf_t    *slcf;
+    ngx_http_spdy_out_frame_t   *frame;
+    ngx_http_spdy_connection_t  *sc;
 
     r = fc->data;
     stream = r->spdy_stream;
@@ -642,8 +636,23 @@
         return NULL;
     }
 
+    sc = stream->connection;
+
     size = ngx_buf_size(in->buf);
 
+    if (size && ngx_http_spdy_flow_control(sc, stream) == NGX_DECLINED) {
+        fc->write->delayed = 1;
+        return in;
+    }
+
+    if (limit == 0 || limit > (off_t) sc->send_window) {
+        limit = sc->send_window;
+    }
+
+    if (limit > stream->send_window) {
+        limit = (stream->send_window > 0) ? stream->send_window : 0;
+    }
+
     if (in->buf->tag == (ngx_buf_tag_t) &ngx_http_spdy_filter_get_shadow) {
         cl = ngx_alloc_chain_link(r->pool);
         if (cl == NULL) {
@@ -670,9 +679,8 @@
 
     slcf = ngx_http_get_module_loc_conf(r, ngx_http_spdy_module);
 
-    frame_size = (limit && limit <= (off_t) slcf->chunk_size)
-                 ? (size_t) limit
-                 : slcf->chunk_size;
+    frame_size = (limit <= (off_t) slcf->chunk_size) ? (size_t) limit
+                                                     : slcf->chunk_size;
 
     for ( ;; ) {
         ln = &out;
@@ -735,24 +743,25 @@
             return NGX_CHAIN_ERROR;
         }
 
-        ngx_http_spdy_queue_frame(stream->connection, frame);
+        ngx_http_spdy_queue_frame(sc, frame);
 
+        sc->send_window -= frame_size;
+
+        stream->send_window -= frame_size;
         stream->queued++;
 
         if (in == NULL) {
             break;
         }
 
-        if (limit) {
-            limit -= frame_size;
+        limit -= frame_size;
 
-            if (limit == 0) {
-                break;
-            }
+        if (limit == 0) {
+            break;
+        }
 
-            if (limit < (off_t) slcf->chunk_size) {
-                frame_size = (size_t) limit;
-            }
+        if (limit < (off_t) slcf->chunk_size) {
+            frame_size = (size_t) limit;
         }
     }
 
@@ -770,6 +779,10 @@
         return NGX_CHAIN_ERROR;
     }
 
+    if (in && ngx_http_spdy_flow_control(sc, stream) == NGX_DECLINED) {
+        fc->write->delayed = 1;
+    }
+
     return in;
 }
 
@@ -876,6 +889,8 @@
 
         cl->next = first;
         first = cl;
+
+        last->buf->flush = 1;
     }
 
     frame->first = first;
@@ -915,6 +930,52 @@
 }
 
 
+static ngx_inline ngx_int_t
+ngx_http_spdy_flow_control(ngx_http_spdy_connection_t *sc,
+    ngx_http_spdy_stream_t *stream)
+{
+    if (stream->send_window <= 0) {
+        stream->exhausted = 1;
+        return NGX_DECLINED;
+    }
+
+    if (sc->send_window == 0) {
+        ngx_http_spdy_waiting_queue(sc, stream);
+        return NGX_DECLINED;
+    }
+
+    return NGX_OK;
+}
+
+
+static void
+ngx_http_spdy_waiting_queue(ngx_http_spdy_connection_t *sc,
+    ngx_http_spdy_stream_t *stream)
+{
+    ngx_queue_t             *q;
+    ngx_http_spdy_stream_t  *s;
+
+    if (stream->handled) {
+        return;
+    }
+
+    stream->handled = 1;
+
+    for (q = ngx_queue_last(&sc->waiting);
+         q != ngx_queue_sentinel(&sc->waiting);
+         q = ngx_queue_prev(q))
+    {
+        s = ngx_queue_data(q, ngx_http_spdy_stream_t, queue);
+
+        if (s->priority >= stream->priority) {
+            break;
+        }
+    }
+
+    ngx_queue_insert_after(q, &stream->queue);
+}
+
+
 static ngx_int_t
 ngx_http_spdy_syn_frame_handler(ngx_http_spdy_connection_t *sc,
     ngx_http_spdy_out_frame_t *frame)
@@ -1063,7 +1124,7 @@
 {
     ngx_event_t  *wev;
 
-    if (stream->handled || stream->blocked) {
+    if (stream->handled || stream->blocked || stream->exhausted) {
         return;
     }
 
@@ -1083,13 +1144,22 @@
 {
     ngx_http_spdy_stream_t *stream = data;
 
-    ngx_http_spdy_out_frame_t  *frame, **fn;
+    size_t                       delta;
+    ngx_http_spdy_out_frame_t   *frame, **fn;
+    ngx_http_spdy_connection_t  *sc;
+
+    if (stream->handled) {
+        stream->handled = 0;
+        ngx_queue_remove(&stream->queue);
+    }
 
     if (stream->queued == 0) {
         return;
     }
 
-    fn = &stream->connection->last_out;
+    delta = 0;
+    sc = stream->connection;
+    fn = &sc->last_out;
 
     for ( ;; ) {
         frame = *fn;
@@ -1099,14 +1169,26 @@
         }
 
         if (frame->stream == stream && !frame->blocked) {
-            stream->queued--;
+            *fn = frame->next;
 
-            *fn = frame->next;
+            delta += frame->length;
+
+            if (--stream->queued == 0) {
+                break;
+            }
+
             continue;
         }
 
         fn = &frame->next;
     }
+
+    if (sc->send_window == 0 && delta && !ngx_queue_empty(&sc->waiting)) {
+        ngx_queue_add(&sc->posted, &sc->waiting);
+        ngx_queue_init(&sc->waiting);
+    }
+
+    sc->send_window += delta;
 }
 
 
--- a/src/http/ngx_http_spdy_module.c	Fri Jan 31 14:18:52 2014 +0400
+++ b/src/http/ngx_http_spdy_module.c	Fri Jan 31 19:17:26 2014 +0400
@@ -180,11 +180,11 @@
     ngx_http_variable_value_t *v, uintptr_t data)
 {
     if (r->spdy_stream) {
-        v->len = 1;
+        v->len = sizeof("3.1") - 1;
         v->valid = 1;
         v->no_cacheable = 0;
         v->not_found = 0;
-        v->data = (u_char *) "2";
+        v->data = (u_char *) "3.1";
 
         return NGX_OK;
     }