Mercurial > hg > nginx
view src/stream/ngx_stream_upstream_random_module.c @ 9156:36b59521a41c
QUIC: refined sending CONNECTION_CLOSE in various packet types.
As per RFC 9000, section 10.2.3, to ensure that peer successfully removed
packet protection, CONNECTION_CLOSE can be sent in multiple packets using
different packet protection levels.
Now it is sent in all protection levels available.
This roughly corresponds to the following paragraph:
* Prior to confirming the handshake, a peer might be unable to process 1-RTT
packets, so an endpoint SHOULD send a CONNECTION_CLOSE frame in both Handshake
and 1-RTT packets. A server SHOULD also send a CONNECTION_CLOSE frame in an
Initial packet.
In practice, this change allows to avoid sending an Initial packet when we know
the client has handshake keys, by checking if we have discarded initial keys.
Also, this fixes sending CONNECTION_CLOSE when using QuicTLS with old QUIC API,
where TLS stack releases application read keys before handshake confirmation;
it is fixed by sending CONNECTION_CLOSE additionally in a Handshake packet.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Fri, 01 Sep 2023 20:31:46 +0400 |
parents | f2396ecf608b |
children |
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/* * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { ngx_stream_upstream_rr_peer_t *peer; ngx_uint_t range; } ngx_stream_upstream_random_range_t; typedef struct { ngx_uint_t two; ngx_stream_upstream_random_range_t *ranges; } ngx_stream_upstream_random_srv_conf_t; typedef struct { /* the round robin data must be first */ ngx_stream_upstream_rr_peer_data_t rrp; ngx_stream_upstream_random_srv_conf_t *conf; u_char tries; } ngx_stream_upstream_random_peer_data_t; static ngx_int_t ngx_stream_upstream_init_random(ngx_conf_t *cf, ngx_stream_upstream_srv_conf_t *us); static ngx_int_t ngx_stream_upstream_update_random(ngx_pool_t *pool, ngx_stream_upstream_srv_conf_t *us); static ngx_int_t ngx_stream_upstream_init_random_peer(ngx_stream_session_t *s, ngx_stream_upstream_srv_conf_t *us); static ngx_int_t ngx_stream_upstream_get_random_peer(ngx_peer_connection_t *pc, void *data); static ngx_int_t ngx_stream_upstream_get_random2_peer(ngx_peer_connection_t *pc, void *data); static ngx_uint_t ngx_stream_upstream_peek_random_peer( ngx_stream_upstream_rr_peers_t *peers, ngx_stream_upstream_random_peer_data_t *rp); static void *ngx_stream_upstream_random_create_conf(ngx_conf_t *cf); static char *ngx_stream_upstream_random(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_command_t ngx_stream_upstream_random_commands[] = { { ngx_string("random"), NGX_STREAM_UPS_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE12, ngx_stream_upstream_random, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_stream_module_t ngx_stream_upstream_random_module_ctx = { NULL, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ ngx_stream_upstream_random_create_conf, /* create server configuration */ NULL /* merge server configuration */ }; ngx_module_t ngx_stream_upstream_random_module = { NGX_MODULE_V1, &ngx_stream_upstream_random_module_ctx, /* module context */ ngx_stream_upstream_random_commands, /* module directives */ NGX_STREAM_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_int_t ngx_stream_upstream_init_random(ngx_conf_t *cf, ngx_stream_upstream_srv_conf_t *us) { ngx_log_debug0(NGX_LOG_DEBUG_STREAM, cf->log, 0, "init random"); if (ngx_stream_upstream_init_round_robin(cf, us) != NGX_OK) { return NGX_ERROR; } us->peer.init = ngx_stream_upstream_init_random_peer; #if (NGX_STREAM_UPSTREAM_ZONE) if (us->shm_zone) { return NGX_OK; } #endif return ngx_stream_upstream_update_random(cf->pool, us); } static ngx_int_t ngx_stream_upstream_update_random(ngx_pool_t *pool, ngx_stream_upstream_srv_conf_t *us) { size_t size; ngx_uint_t i, total_weight; ngx_stream_upstream_rr_peer_t *peer; ngx_stream_upstream_rr_peers_t *peers; ngx_stream_upstream_random_range_t *ranges; ngx_stream_upstream_random_srv_conf_t *rcf; rcf = ngx_stream_conf_upstream_srv_conf(us, ngx_stream_upstream_random_module); peers = us->peer.data; size = peers->number * sizeof(ngx_stream_upstream_random_range_t); ranges = pool ? ngx_palloc(pool, size) : ngx_alloc(size, ngx_cycle->log); if (ranges == NULL) { return NGX_ERROR; } total_weight = 0; for (peer = peers->peer, i = 0; peer; peer = peer->next, i++) { ranges[i].peer = peer; ranges[i].range = total_weight; total_weight += peer->weight; } rcf->ranges = ranges; return NGX_OK; } static ngx_int_t ngx_stream_upstream_init_random_peer(ngx_stream_session_t *s, ngx_stream_upstream_srv_conf_t *us) { ngx_stream_upstream_random_srv_conf_t *rcf; ngx_stream_upstream_random_peer_data_t *rp; ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "init random peer"); rcf = ngx_stream_conf_upstream_srv_conf(us, ngx_stream_upstream_random_module); rp = ngx_palloc(s->connection->pool, sizeof(ngx_stream_upstream_random_peer_data_t)); if (rp == NULL) { return NGX_ERROR; } s->upstream->peer.data = &rp->rrp; if (ngx_stream_upstream_init_round_robin_peer(s, us) != NGX_OK) { return NGX_ERROR; } if (rcf->two) { s->upstream->peer.get = ngx_stream_upstream_get_random2_peer; } else { s->upstream->peer.get = ngx_stream_upstream_get_random_peer; } rp->conf = rcf; rp->tries = 0; ngx_stream_upstream_rr_peers_rlock(rp->rrp.peers); #if (NGX_STREAM_UPSTREAM_ZONE) if (rp->rrp.peers->shpool && rcf->ranges == NULL) { if (ngx_stream_upstream_update_random(NULL, us) != NGX_OK) { ngx_stream_upstream_rr_peers_unlock(rp->rrp.peers); return NGX_ERROR; } } #endif ngx_stream_upstream_rr_peers_unlock(rp->rrp.peers); return NGX_OK; } static ngx_int_t ngx_stream_upstream_get_random_peer(ngx_peer_connection_t *pc, void *data) { ngx_stream_upstream_random_peer_data_t *rp = data; time_t now; uintptr_t m; ngx_uint_t i, n; ngx_stream_upstream_rr_peer_t *peer; ngx_stream_upstream_rr_peers_t *peers; ngx_stream_upstream_rr_peer_data_t *rrp; ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, "get random peer, try: %ui", pc->tries); rrp = &rp->rrp; peers = rrp->peers; ngx_stream_upstream_rr_peers_rlock(peers); if (rp->tries > 20 || peers->single) { ngx_stream_upstream_rr_peers_unlock(peers); return ngx_stream_upstream_get_round_robin_peer(pc, rrp); } pc->cached = 0; pc->connection = NULL; now = ngx_time(); for ( ;; ) { i = ngx_stream_upstream_peek_random_peer(peers, rp); peer = rp->conf->ranges[i].peer; n = i / (8 * sizeof(uintptr_t)); m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); if (rrp->tried[n] & m) { goto next; } ngx_stream_upstream_rr_peer_lock(peers, peer); if (peer->down) { ngx_stream_upstream_rr_peer_unlock(peers, peer); goto next; } if (peer->max_fails && peer->fails >= peer->max_fails && now - peer->checked <= peer->fail_timeout) { ngx_stream_upstream_rr_peer_unlock(peers, peer); goto next; } if (peer->max_conns && peer->conns >= peer->max_conns) { ngx_stream_upstream_rr_peer_unlock(peers, peer); goto next; } break; next: if (++rp->tries > 20) { ngx_stream_upstream_rr_peers_unlock(peers); return ngx_stream_upstream_get_round_robin_peer(pc, rrp); } } rrp->current = peer; if (now - peer->checked > peer->fail_timeout) { peer->checked = now; } pc->sockaddr = peer->sockaddr; pc->socklen = peer->socklen; pc->name = &peer->name; peer->conns++; ngx_stream_upstream_rr_peer_unlock(peers, peer); ngx_stream_upstream_rr_peers_unlock(peers); rrp->tried[n] |= m; return NGX_OK; } static ngx_int_t ngx_stream_upstream_get_random2_peer(ngx_peer_connection_t *pc, void *data) { ngx_stream_upstream_random_peer_data_t *rp = data; time_t now; uintptr_t m; ngx_uint_t i, n, p; ngx_stream_upstream_rr_peer_t *peer, *prev; ngx_stream_upstream_rr_peers_t *peers; ngx_stream_upstream_rr_peer_data_t *rrp; ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, "get random2 peer, try: %ui", pc->tries); rrp = &rp->rrp; peers = rrp->peers; ngx_stream_upstream_rr_peers_wlock(peers); if (rp->tries > 20 || peers->single) { ngx_stream_upstream_rr_peers_unlock(peers); return ngx_stream_upstream_get_round_robin_peer(pc, rrp); } pc->cached = 0; pc->connection = NULL; now = ngx_time(); prev = NULL; #if (NGX_SUPPRESS_WARN) p = 0; #endif for ( ;; ) { i = ngx_stream_upstream_peek_random_peer(peers, rp); peer = rp->conf->ranges[i].peer; if (peer == prev) { goto next; } n = i / (8 * sizeof(uintptr_t)); m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); if (rrp->tried[n] & m) { goto next; } if (peer->down) { goto next; } if (peer->max_fails && peer->fails >= peer->max_fails && now - peer->checked <= peer->fail_timeout) { goto next; } if (peer->max_conns && peer->conns >= peer->max_conns) { goto next; } if (prev) { if (peer->conns * prev->weight > prev->conns * peer->weight) { peer = prev; n = p / (8 * sizeof(uintptr_t)); m = (uintptr_t) 1 << p % (8 * sizeof(uintptr_t)); } break; } prev = peer; p = i; next: if (++rp->tries > 20) { ngx_stream_upstream_rr_peers_unlock(peers); return ngx_stream_upstream_get_round_robin_peer(pc, rrp); } } rrp->current = peer; if (now - peer->checked > peer->fail_timeout) { peer->checked = now; } pc->sockaddr = peer->sockaddr; pc->socklen = peer->socklen; pc->name = &peer->name; peer->conns++; ngx_stream_upstream_rr_peers_unlock(peers); rrp->tried[n] |= m; return NGX_OK; } static ngx_uint_t ngx_stream_upstream_peek_random_peer(ngx_stream_upstream_rr_peers_t *peers, ngx_stream_upstream_random_peer_data_t *rp) { ngx_uint_t i, j, k, x; x = ngx_random() % peers->total_weight; i = 0; j = peers->number; while (j - i > 1) { k = (i + j) / 2; if (x < rp->conf->ranges[k].range) { j = k; } else { i = k; } } return i; } static void * ngx_stream_upstream_random_create_conf(ngx_conf_t *cf) { ngx_stream_upstream_random_srv_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_random_srv_conf_t)); if (conf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * conf->two = 0; */ return conf; } static char * ngx_stream_upstream_random(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_stream_upstream_random_srv_conf_t *rcf = conf; ngx_str_t *value; ngx_stream_upstream_srv_conf_t *uscf; uscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_upstream_module); if (uscf->peer.init_upstream) { ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "load balancing method redefined"); } uscf->peer.init_upstream = ngx_stream_upstream_init_random; uscf->flags = NGX_STREAM_UPSTREAM_CREATE |NGX_STREAM_UPSTREAM_WEIGHT |NGX_STREAM_UPSTREAM_MAX_CONNS |NGX_STREAM_UPSTREAM_MAX_FAILS |NGX_STREAM_UPSTREAM_FAIL_TIMEOUT |NGX_STREAM_UPSTREAM_DOWN; if (cf->args->nelts == 1) { return NGX_CONF_OK; } value = cf->args->elts; if (ngx_strcmp(value[1].data, "two") == 0) { rcf->two = 1; } else { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[1]); return NGX_CONF_ERROR; } if (cf->args->nelts == 2) { return NGX_CONF_OK; } if (ngx_strcmp(value[2].data, "least_conn") != 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[2]); return NGX_CONF_ERROR; } return NGX_CONF_OK; }