Mercurial > hg > nginx
view src/stream/ngx_stream_access_module.c @ 9138:a90f79792b5d
QUIC: optimized ACK delay.
Previously ACK was not generated if max_ack_delay was not yet expired and the
number of unacknowledged ack-eliciting packets was less than two, as allowed by
RFC 9000 13.2.1-13.2.2. However this only makes sense to avoid sending ACK-only
packets, as explained by the RFC:
On the other hand, reducing the frequency of packets that carry only
acknowledgments reduces packet transmission and processing cost at both
endpoints.
Now ACK is delayed only if output frame queue is empty. Otherwise ACK is sent
immediately, which significantly improves QUIC performance with certain tests.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Thu, 27 Jul 2023 16:37:17 +0400 |
parents | 72188d1bcab5 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { in_addr_t mask; in_addr_t addr; ngx_uint_t deny; /* unsigned deny:1; */ } ngx_stream_access_rule_t; #if (NGX_HAVE_INET6) typedef struct { struct in6_addr addr; struct in6_addr mask; ngx_uint_t deny; /* unsigned deny:1; */ } ngx_stream_access_rule6_t; #endif #if (NGX_HAVE_UNIX_DOMAIN) typedef struct { ngx_uint_t deny; /* unsigned deny:1; */ } ngx_stream_access_rule_un_t; #endif typedef struct { ngx_array_t *rules; /* array of ngx_stream_access_rule_t */ #if (NGX_HAVE_INET6) ngx_array_t *rules6; /* array of ngx_stream_access_rule6_t */ #endif #if (NGX_HAVE_UNIX_DOMAIN) ngx_array_t *rules_un; /* array of ngx_stream_access_rule_un_t */ #endif } ngx_stream_access_srv_conf_t; static ngx_int_t ngx_stream_access_handler(ngx_stream_session_t *s); static ngx_int_t ngx_stream_access_inet(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf, in_addr_t addr); #if (NGX_HAVE_INET6) static ngx_int_t ngx_stream_access_inet6(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf, u_char *p); #endif #if (NGX_HAVE_UNIX_DOMAIN) static ngx_int_t ngx_stream_access_unix(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf); #endif static ngx_int_t ngx_stream_access_found(ngx_stream_session_t *s, ngx_uint_t deny); static char *ngx_stream_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void *ngx_stream_access_create_srv_conf(ngx_conf_t *cf); static char *ngx_stream_access_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_stream_access_init(ngx_conf_t *cf); static ngx_command_t ngx_stream_access_commands[] = { { ngx_string("allow"), NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, ngx_stream_access_rule, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("deny"), NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, ngx_stream_access_rule, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_stream_module_t ngx_stream_access_module_ctx = { NULL, /* preconfiguration */ ngx_stream_access_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ ngx_stream_access_create_srv_conf, /* create server configuration */ ngx_stream_access_merge_srv_conf /* merge server configuration */ }; ngx_module_t ngx_stream_access_module = { NGX_MODULE_V1, &ngx_stream_access_module_ctx, /* module context */ ngx_stream_access_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_access_handler(ngx_stream_session_t *s) { struct sockaddr_in *sin; ngx_stream_access_srv_conf_t *ascf; #if (NGX_HAVE_INET6) u_char *p; in_addr_t addr; struct sockaddr_in6 *sin6; #endif ascf = ngx_stream_get_module_srv_conf(s, ngx_stream_access_module); switch (s->connection->sockaddr->sa_family) { case AF_INET: if (ascf->rules) { sin = (struct sockaddr_in *) s->connection->sockaddr; return ngx_stream_access_inet(s, ascf, sin->sin_addr.s_addr); } break; #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) s->connection->sockaddr; p = sin6->sin6_addr.s6_addr; if (ascf->rules && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { addr = p[12] << 24; addr += p[13] << 16; addr += p[14] << 8; addr += p[15]; return ngx_stream_access_inet(s, ascf, htonl(addr)); } if (ascf->rules6) { return ngx_stream_access_inet6(s, ascf, p); } break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: if (ascf->rules_un) { return ngx_stream_access_unix(s, ascf); } break; #endif } return NGX_DECLINED; } static ngx_int_t ngx_stream_access_inet(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf, in_addr_t addr) { ngx_uint_t i; ngx_stream_access_rule_t *rule; rule = ascf->rules->elts; for (i = 0; i < ascf->rules->nelts; i++) { ngx_log_debug3(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "access: %08XD %08XD %08XD", addr, rule[i].mask, rule[i].addr); if ((addr & rule[i].mask) == rule[i].addr) { return ngx_stream_access_found(s, rule[i].deny); } } return NGX_DECLINED; } #if (NGX_HAVE_INET6) static ngx_int_t ngx_stream_access_inet6(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf, u_char *p) { ngx_uint_t n; ngx_uint_t i; ngx_stream_access_rule6_t *rule6; rule6 = ascf->rules6->elts; for (i = 0; i < ascf->rules6->nelts; i++) { #if (NGX_DEBUG) { size_t cl, ml, al; u_char ct[NGX_INET6_ADDRSTRLEN]; u_char mt[NGX_INET6_ADDRSTRLEN]; u_char at[NGX_INET6_ADDRSTRLEN]; cl = ngx_inet6_ntop(p, ct, NGX_INET6_ADDRSTRLEN); ml = ngx_inet6_ntop(rule6[i].mask.s6_addr, mt, NGX_INET6_ADDRSTRLEN); al = ngx_inet6_ntop(rule6[i].addr.s6_addr, at, NGX_INET6_ADDRSTRLEN); ngx_log_debug6(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "access: %*s %*s %*s", cl, ct, ml, mt, al, at); } #endif for (n = 0; n < 16; n++) { if ((p[n] & rule6[i].mask.s6_addr[n]) != rule6[i].addr.s6_addr[n]) { goto next; } } return ngx_stream_access_found(s, rule6[i].deny); next: continue; } return NGX_DECLINED; } #endif #if (NGX_HAVE_UNIX_DOMAIN) static ngx_int_t ngx_stream_access_unix(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf) { ngx_uint_t i; ngx_stream_access_rule_un_t *rule_un; rule_un = ascf->rules_un->elts; for (i = 0; i < ascf->rules_un->nelts; i++) { /* TODO: check path */ if (1) { return ngx_stream_access_found(s, rule_un[i].deny); } } return NGX_DECLINED; } #endif static ngx_int_t ngx_stream_access_found(ngx_stream_session_t *s, ngx_uint_t deny) { if (deny) { ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, "access forbidden by rule"); return NGX_STREAM_FORBIDDEN; } return NGX_OK; } static char * ngx_stream_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_stream_access_srv_conf_t *ascf = conf; ngx_int_t rc; ngx_uint_t all; ngx_str_t *value; ngx_cidr_t cidr; ngx_stream_access_rule_t *rule; #if (NGX_HAVE_INET6) ngx_stream_access_rule6_t *rule6; #endif #if (NGX_HAVE_UNIX_DOMAIN) ngx_stream_access_rule_un_t *rule_un; #endif all = 0; ngx_memzero(&cidr, sizeof(ngx_cidr_t)); value = cf->args->elts; if (value[1].len == 3 && ngx_strcmp(value[1].data, "all") == 0) { all = 1; #if (NGX_HAVE_UNIX_DOMAIN) } else if (value[1].len == 5 && ngx_strcmp(value[1].data, "unix:") == 0) { cidr.family = AF_UNIX; #endif } else { rc = ngx_ptocidr(&value[1], &cidr); if (rc == NGX_ERROR) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[1]); return NGX_CONF_ERROR; } if (rc == NGX_DONE) { ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "low address bits of %V are meaningless", &value[1]); } } if (cidr.family == AF_INET || all) { if (ascf->rules == NULL) { ascf->rules = ngx_array_create(cf->pool, 4, sizeof(ngx_stream_access_rule_t)); if (ascf->rules == NULL) { return NGX_CONF_ERROR; } } rule = ngx_array_push(ascf->rules); if (rule == NULL) { return NGX_CONF_ERROR; } rule->mask = cidr.u.in.mask; rule->addr = cidr.u.in.addr; rule->deny = (value[0].data[0] == 'd') ? 1 : 0; } #if (NGX_HAVE_INET6) if (cidr.family == AF_INET6 || all) { if (ascf->rules6 == NULL) { ascf->rules6 = ngx_array_create(cf->pool, 4, sizeof(ngx_stream_access_rule6_t)); if (ascf->rules6 == NULL) { return NGX_CONF_ERROR; } } rule6 = ngx_array_push(ascf->rules6); if (rule6 == NULL) { return NGX_CONF_ERROR; } rule6->mask = cidr.u.in6.mask; rule6->addr = cidr.u.in6.addr; rule6->deny = (value[0].data[0] == 'd') ? 1 : 0; } #endif #if (NGX_HAVE_UNIX_DOMAIN) if (cidr.family == AF_UNIX || all) { if (ascf->rules_un == NULL) { ascf->rules_un = ngx_array_create(cf->pool, 1, sizeof(ngx_stream_access_rule_un_t)); if (ascf->rules_un == NULL) { return NGX_CONF_ERROR; } } rule_un = ngx_array_push(ascf->rules_un); if (rule_un == NULL) { return NGX_CONF_ERROR; } rule_un->deny = (value[0].data[0] == 'd') ? 1 : 0; } #endif return NGX_CONF_OK; } static void * ngx_stream_access_create_srv_conf(ngx_conf_t *cf) { ngx_stream_access_srv_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_access_srv_conf_t)); if (conf == NULL) { return NULL; } return conf; } static char * ngx_stream_access_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_stream_access_srv_conf_t *prev = parent; ngx_stream_access_srv_conf_t *conf = child; if (conf->rules == NULL #if (NGX_HAVE_INET6) && conf->rules6 == NULL #endif #if (NGX_HAVE_UNIX_DOMAIN) && conf->rules_un == NULL #endif ) { conf->rules = prev->rules; #if (NGX_HAVE_INET6) conf->rules6 = prev->rules6; #endif #if (NGX_HAVE_UNIX_DOMAIN) conf->rules_un = prev->rules_un; #endif } return NGX_CONF_OK; } static ngx_int_t ngx_stream_access_init(ngx_conf_t *cf) { ngx_stream_handler_pt *h; ngx_stream_core_main_conf_t *cmcf; cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module); h = ngx_array_push(&cmcf->phases[NGX_STREAM_ACCESS_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_stream_access_handler; return NGX_OK; }