Mercurial > hg > nginx
annotate src/stream/ngx_stream_upstream_round_robin.h @ 6749:f88a145b093e stable-1.10
HTTP/2: the "421 Misdirected Request" response (closes #848).
Since 4fbef397c753 nginx rejects with the 400 error any attempts of
requesting different host over the same connection, if the relevant
virtual server requires verification of a client certificate.
While requesting hosts other than negotiated isn't something legal
in HTTP/1.x, the HTTP/2 specification explicitly permits such requests
for connection reuse and has introduced a special response code 421.
According to RFC 7540 Section 9.1.2 this code can be sent by a server
that is not configured to produce responses for the combination of
scheme and authority that are included in the request URI. And the
client may retry the request over a different connection.
Now this code is used for requests that aren't authorized in current
connection. After receiving the 421 response a client will be able
to open a new connection, provide the required certificate and retry
the request.
Unfortunately, not all clients currently are able to handle it well.
Notably Chrome just shows an error, while at least the latest version
of Firefox retries the request over a new connection.
| author | Valentin Bartenev <vbart@nginx.com> |
|---|---|
| date | Fri, 20 May 2016 18:41:17 +0300 |
| parents | 311d232ad803 |
| children | 9757cffc1e2f |
| rev | line source |
|---|---|
| 6115 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 * Copyright (C) Nginx, Inc. | |
| 5 */ | |
| 6 | |
| 7 | |
| 8 #ifndef _NGX_STREAM_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ | |
| 9 #define _NGX_STREAM_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ | |
| 10 | |
| 11 | |
| 12 #include <ngx_config.h> | |
| 13 #include <ngx_core.h> | |
| 14 #include <ngx_stream.h> | |
| 15 | |
| 16 | |
| 17 typedef struct ngx_stream_upstream_rr_peer_s ngx_stream_upstream_rr_peer_t; | |
| 18 | |
| 19 struct ngx_stream_upstream_rr_peer_s { | |
| 20 struct sockaddr *sockaddr; | |
| 21 socklen_t socklen; | |
| 22 ngx_str_t name; | |
| 23 ngx_str_t server; | |
| 24 | |
| 25 ngx_int_t current_weight; | |
| 26 ngx_int_t effective_weight; | |
| 27 ngx_int_t weight; | |
| 28 | |
| 29 ngx_uint_t conns; | |
| 30 | |
| 31 ngx_uint_t fails; | |
| 32 time_t accessed; | |
| 33 time_t checked; | |
| 34 | |
| 35 ngx_uint_t max_fails; | |
| 36 time_t fail_timeout; | |
| 37 | |
| 38 ngx_uint_t down; /* unsigned down:1; */ | |
| 39 | |
| 40 #if (NGX_STREAM_SSL) | |
| 41 void *ssl_session; | |
| 42 int ssl_session_len; | |
| 43 #endif | |
| 44 | |
| 45 ngx_stream_upstream_rr_peer_t *next; | |
| 46 | |
| 47 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 48 ngx_atomic_t lock; | |
| 49 #endif | |
| 50 }; | |
| 51 | |
| 52 | |
| 53 typedef struct ngx_stream_upstream_rr_peers_s ngx_stream_upstream_rr_peers_t; | |
| 54 | |
| 55 struct ngx_stream_upstream_rr_peers_s { | |
| 56 ngx_uint_t number; | |
| 57 | |
| 58 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 59 ngx_slab_pool_t *shpool; | |
| 60 ngx_atomic_t rwlock; | |
|
6198
311d232ad803
Upstream: fixed shared upstreams on win32.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
61 ngx_stream_upstream_rr_peers_t *zone_next; |
| 6115 | 62 #endif |
| 63 | |
| 64 ngx_uint_t total_weight; | |
| 65 | |
| 66 unsigned single:1; | |
| 67 unsigned weighted:1; | |
| 68 | |
| 69 ngx_str_t *name; | |
| 70 | |
| 71 ngx_stream_upstream_rr_peers_t *next; | |
| 72 | |
| 73 ngx_stream_upstream_rr_peer_t *peer; | |
| 74 }; | |
| 75 | |
| 76 | |
| 77 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 78 | |
| 79 #define ngx_stream_upstream_rr_peers_rlock(peers) \ | |
| 80 \ | |
| 81 if (peers->shpool) { \ | |
| 82 ngx_rwlock_rlock(&peers->rwlock); \ | |
| 83 } | |
| 84 | |
| 85 #define ngx_stream_upstream_rr_peers_wlock(peers) \ | |
| 86 \ | |
| 87 if (peers->shpool) { \ | |
| 88 ngx_rwlock_wlock(&peers->rwlock); \ | |
| 89 } | |
| 90 | |
| 91 #define ngx_stream_upstream_rr_peers_unlock(peers) \ | |
| 92 \ | |
| 93 if (peers->shpool) { \ | |
| 94 ngx_rwlock_unlock(&peers->rwlock); \ | |
| 95 } | |
| 96 | |
| 97 | |
| 98 #define ngx_stream_upstream_rr_peer_lock(peers, peer) \ | |
| 99 \ | |
| 100 if (peers->shpool) { \ | |
| 101 ngx_rwlock_wlock(&peer->lock); \ | |
| 102 } | |
| 103 | |
| 104 #define ngx_stream_upstream_rr_peer_unlock(peers, peer) \ | |
| 105 \ | |
| 106 if (peers->shpool) { \ | |
| 107 ngx_rwlock_unlock(&peer->lock); \ | |
| 108 } | |
| 109 | |
| 110 #else | |
| 111 | |
| 112 #define ngx_stream_upstream_rr_peers_rlock(peers) | |
| 113 #define ngx_stream_upstream_rr_peers_wlock(peers) | |
| 114 #define ngx_stream_upstream_rr_peers_unlock(peers) | |
| 115 #define ngx_stream_upstream_rr_peer_lock(peers, peer) | |
| 116 #define ngx_stream_upstream_rr_peer_unlock(peers, peer) | |
| 117 | |
| 118 #endif | |
| 119 | |
| 120 | |
| 121 typedef struct { | |
| 122 ngx_stream_upstream_rr_peers_t *peers; | |
| 123 ngx_stream_upstream_rr_peer_t *current; | |
| 124 uintptr_t *tried; | |
| 125 uintptr_t data; | |
| 126 } ngx_stream_upstream_rr_peer_data_t; | |
| 127 | |
| 128 | |
| 129 ngx_int_t ngx_stream_upstream_init_round_robin(ngx_conf_t *cf, | |
| 130 ngx_stream_upstream_srv_conf_t *us); | |
| 131 ngx_int_t ngx_stream_upstream_init_round_robin_peer(ngx_stream_session_t *s, | |
| 132 ngx_stream_upstream_srv_conf_t *us); | |
| 133 ngx_int_t ngx_stream_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, | |
| 134 void *data); | |
| 135 void ngx_stream_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, | |
| 136 void *data, ngx_uint_t state); | |
| 137 | |
| 138 | |
| 139 #endif /* _NGX_STREAM_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ */ |