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471 lines
12 KiB
471 lines
12 KiB
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/*
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* Copyright (C) Roman Arutyunyan
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include "ngx_rtmp.h"
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#include "ngx_rtmp_cmd_module.h"
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static ngx_rtmp_publish_pt next_publish;
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static ngx_rtmp_play_pt next_play;
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#define NGX_RTMP_ACCESS_PUBLISH 0x01
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#define NGX_RTMP_ACCESS_PLAY 0x02
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static char * ngx_rtmp_access_rule(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static ngx_int_t ngx_rtmp_access_postconfiguration(ngx_conf_t *cf);
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static void * ngx_rtmp_access_create_app_conf(ngx_conf_t *cf);
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static char * ngx_rtmp_access_merge_app_conf(ngx_conf_t *cf,
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void *parent, void *child);
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typedef struct {
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in_addr_t mask;
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in_addr_t addr;
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ngx_uint_t deny;
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ngx_uint_t flags;
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} ngx_rtmp_access_rule_t;
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#if (NGX_HAVE_INET6)
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typedef struct {
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struct in6_addr addr;
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struct in6_addr mask;
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ngx_uint_t deny;
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ngx_uint_t flags;
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} ngx_rtmp_access_rule6_t;
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#endif
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typedef struct {
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ngx_array_t rules; /* array of ngx_rtmp_access_rule_t */
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#if (NGX_HAVE_INET6)
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ngx_array_t rules6; /* array of ngx_rtmp_access_rule6_t */
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#endif
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} ngx_rtmp_access_app_conf_t;
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static ngx_command_t ngx_rtmp_access_commands[] = {
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{ ngx_string("allow"),
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NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE12,
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ngx_rtmp_access_rule,
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NGX_RTMP_APP_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("deny"),
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NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE12,
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ngx_rtmp_access_rule,
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NGX_RTMP_APP_CONF_OFFSET,
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0,
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NULL },
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ngx_null_command
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};
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static ngx_rtmp_module_t ngx_rtmp_access_module_ctx = {
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NULL, /* preconfiguration */
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ngx_rtmp_access_postconfiguration, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_rtmp_access_create_app_conf, /* create app configuration */
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ngx_rtmp_access_merge_app_conf, /* merge app configuration */
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};
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ngx_module_t ngx_rtmp_access_module = {
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NGX_MODULE_V1,
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&ngx_rtmp_access_module_ctx, /* module context */
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ngx_rtmp_access_commands, /* module directives */
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NGX_RTMP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static void *
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ngx_rtmp_access_create_app_conf(ngx_conf_t *cf)
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{
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ngx_rtmp_access_app_conf_t *aacf;
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aacf = ngx_pcalloc(cf->pool, sizeof(ngx_rtmp_access_app_conf_t));
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if (aacf == NULL) {
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return NULL;
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}
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if (ngx_array_init(&aacf->rules, cf->pool, 1,
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sizeof(ngx_rtmp_access_rule_t))
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!= NGX_OK)
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{
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return NULL;
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}
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#if (NGX_HAVE_INET6)
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if (ngx_array_init(&aacf->rules6, cf->pool, 1,
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sizeof(ngx_rtmp_access_rule6_t))
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!= NGX_OK)
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{
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return NULL;
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}
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#endif
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return aacf;
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}
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static ngx_int_t
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ngx_rtmp_access_merge_rules(ngx_array_t *prev, ngx_array_t *rules)
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{
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void *p;
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if (prev->nelts == 0) {
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return NGX_OK;
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}
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if (rules->nelts == 0) {
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*rules = *prev;
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return NGX_OK;
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}
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p = ngx_array_push_n(rules, prev->nelts);
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if (p == NULL) {
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return NGX_ERROR;
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}
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ngx_memcpy(p, prev->elts, prev->size * prev->nelts);
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return NGX_OK;
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}
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static char *
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ngx_rtmp_access_merge_app_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_rtmp_access_app_conf_t *prev = parent;
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ngx_rtmp_access_app_conf_t *conf = child;
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if (ngx_rtmp_access_merge_rules(&prev->rules, &conf->rules) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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#if (NGX_HAVE_INET6)
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if (ngx_rtmp_access_merge_rules(&prev->rules6, &conf->rules6) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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#endif
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return NGX_CONF_OK;
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}
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static ngx_int_t
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ngx_rtmp_access_found(ngx_rtmp_session_t *s, ngx_uint_t deny)
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{
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if (deny) {
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ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
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"access forbidden by rule");
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return NGX_ERROR;
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}
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_access_inet(ngx_rtmp_session_t *s, in_addr_t addr, ngx_uint_t flag)
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{
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ngx_uint_t i;
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ngx_rtmp_access_rule_t *rule;
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ngx_rtmp_access_app_conf_t *ascf;
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ascf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_access_module);
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rule = ascf->rules.elts;
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for (i = 0; i < ascf->rules.nelts; i++) {
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ngx_log_debug3(NGX_LOG_DEBUG_HTTP, s->connection->log, 0,
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"access: %08XD %08XD %08XD",
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addr, rule[i].mask, rule[i].addr);
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if ((addr & rule[i].mask) == rule[i].addr && (flag & rule[i].flags)) {
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return ngx_rtmp_access_found(s, rule[i].deny);
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}
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}
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return NGX_OK;
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}
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#if (NGX_HAVE_INET6)
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static ngx_int_t
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ngx_rtmp_access_inet6(ngx_rtmp_session_t *s, u_char *p, ngx_uint_t flag)
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{
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ngx_uint_t n;
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ngx_uint_t i;
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ngx_rtmp_access_rule6_t *rule6;
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ngx_rtmp_access_app_conf_t *ascf;
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ascf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_access_module);
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rule6 = ascf->rules6.elts;
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for (i = 0; i < ascf->rules6.nelts; i++) {
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#if (NGX_DEBUG)
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{
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size_t cl, ml, al;
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u_char ct[NGX_INET6_ADDRSTRLEN];
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u_char mt[NGX_INET6_ADDRSTRLEN];
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u_char at[NGX_INET6_ADDRSTRLEN];
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cl = ngx_inet6_ntop(p, ct, NGX_INET6_ADDRSTRLEN);
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ml = ngx_inet6_ntop(rule6[i].mask.s6_addr, mt, NGX_INET6_ADDRSTRLEN);
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al = ngx_inet6_ntop(rule6[i].addr.s6_addr, at, NGX_INET6_ADDRSTRLEN);
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ngx_log_debug6(NGX_LOG_DEBUG_HTTP, s->connection->log, 0,
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"access: %*s %*s %*s", cl, ct, ml, mt, al, at);
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}
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#endif
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for (n = 0; n < 16; n++) {
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if ((p[n] & rule6[i].mask.s6_addr[n]) != rule6[i].addr.s6_addr[n]) {
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goto next;
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}
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}
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if (flag & rule6[i].flags) {
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return ngx_rtmp_access_found(s, rule6[i].deny);
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}
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next:
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continue;
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}
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return NGX_OK;
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}
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#endif
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static ngx_int_t
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ngx_rtmp_access(ngx_rtmp_session_t *s, ngx_uint_t flag)
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{
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struct sockaddr_in *sin;
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ngx_rtmp_access_app_conf_t *ascf;
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#if (NGX_HAVE_INET6)
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u_char *p;
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in_addr_t addr;
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struct sockaddr_in6 *sin6;
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#endif
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ascf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_access_module);
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if (ascf == NULL) {
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, s->connection->log, 0,
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"access: NULL app conf");
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return NGX_ERROR;
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}
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/* relay etc */
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if (s->connection->sockaddr == NULL) {
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return NGX_OK;
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}
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switch (s->connection->sockaddr->sa_family) {
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case AF_INET:
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sin = (struct sockaddr_in *) s->connection->sockaddr;
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return ngx_rtmp_access_inet(s, sin->sin_addr.s_addr, flag);
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#if (NGX_HAVE_INET6)
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case AF_INET6:
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sin6 = (struct sockaddr_in6 *) s->connection->sockaddr;
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p = sin6->sin6_addr.s6_addr;
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if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
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addr = p[12] << 24;
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addr += p[13] << 16;
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addr += p[14] << 8;
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addr += p[15];
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return ngx_rtmp_access_inet(s, htonl(addr), flag);
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}
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return ngx_rtmp_access_inet6(s, p, flag);
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#endif
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}
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return NGX_OK;
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}
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static char *
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ngx_rtmp_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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{
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ngx_rtmp_access_app_conf_t *ascf = conf;
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ngx_int_t rc;
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ngx_uint_t all;
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ngx_str_t *value;
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ngx_cidr_t cidr;
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ngx_rtmp_access_rule_t *rule;
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#if (NGX_HAVE_INET6)
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ngx_rtmp_access_rule6_t *rule6;
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#endif
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size_t n;
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ngx_uint_t flags;
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ngx_memzero(&cidr, sizeof(ngx_cidr_t));
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value = cf->args->elts;
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n = 1;
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flags = 0;
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if (cf->args->nelts == 2) {
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flags = NGX_RTMP_ACCESS_PUBLISH | NGX_RTMP_ACCESS_PLAY;
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} else {
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for(; n < cf->args->nelts - 1; ++n) {
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if (value[n].len == sizeof("publish") - 1 &&
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ngx_strcmp(value[1].data, "publish") == 0)
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{
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flags |= NGX_RTMP_ACCESS_PUBLISH;
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continue;
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}
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if (value[n].len == sizeof("play") - 1 &&
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ngx_strcmp(value[1].data, "play") == 0)
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{
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flags |= NGX_RTMP_ACCESS_PLAY;
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continue;
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}
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ngx_log_error(NGX_LOG_ERR, cf->log, 0,
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"unexpected access specified: '%V'", &value[n]);
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return NGX_CONF_ERROR;
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}
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}
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all = (value[n].len == 3 && ngx_strcmp(value[n].data, "all") == 0);
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if (!all) {
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rc = ngx_ptocidr(&value[n], &cidr);
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if (rc == NGX_ERROR) {
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ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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"invalid parameter \"%V\"", &value[1]);
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return NGX_CONF_ERROR;
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}
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if (rc == NGX_DONE) {
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ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
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"low address bits of %V are meaningless",
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&value[1]);
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}
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}
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switch (cidr.family) {
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#if (NGX_HAVE_INET6)
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case AF_INET6:
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case 0: /* all */
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rule6 = ngx_array_push(&ascf->rules6);
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if (rule6 == NULL) {
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return NGX_CONF_ERROR;
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}
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rule6->mask = cidr.u.in6.mask;
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rule6->addr = cidr.u.in6.addr;
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rule6->deny = (value[0].data[0] == 'd') ? 1 : 0;
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rule6->flags = flags;
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if (!all) {
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break;
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}
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#endif
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/* fall through */
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default: /* AF_INET */
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rule = ngx_array_push(&ascf->rules);
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if (rule == NULL) {
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return NGX_CONF_ERROR;
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}
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rule->mask = cidr.u.in.mask;
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rule->addr = cidr.u.in.addr;
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rule->deny = (value[0].data[0] == 'd') ? 1 : 0;
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rule->flags = flags;
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}
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return NGX_CONF_OK;
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}
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static ngx_int_t
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ngx_rtmp_access_publish(ngx_rtmp_session_t *s, ngx_rtmp_publish_t *v)
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{
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if (s->auto_pushed) {
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goto next;
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}
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if (ngx_rtmp_access(s, NGX_RTMP_ACCESS_PUBLISH) != NGX_OK) {
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return NGX_ERROR;
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}
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next:
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return next_publish(s, v);
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}
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static ngx_int_t
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ngx_rtmp_access_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
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{
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if (ngx_rtmp_access(s, NGX_RTMP_ACCESS_PLAY) != NGX_OK) {
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return NGX_ERROR;
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}
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return next_play(s, v);
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}
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static ngx_int_t
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ngx_rtmp_access_postconfiguration(ngx_conf_t *cf)
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{
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/* chain handlers */
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next_publish = ngx_rtmp_publish;
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ngx_rtmp_publish = ngx_rtmp_access_publish;
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next_play = ngx_rtmp_play;
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ngx_rtmp_play = ngx_rtmp_access_play;
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return NGX_OK;
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}
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