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src/stream/ngx_stream_access_module.c - nginx source code
Global variables defined
Data types defined
Functions defined
Source code
- #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;
- } ngx_stream_access_rule_t;
- #if (NGX_HAVE_INET6)
- typedef struct {
- struct in6_addr addr;
- struct in6_addr mask;
- ngx_uint_t deny;
- } ngx_stream_access_rule6_t;
- #endif
- #if (NGX_HAVE_UNIX_DOMAIN)
- typedef struct {
- ngx_uint_t deny;
- } ngx_stream_access_rule_un_t;
- #endif
- typedef struct {
- ngx_array_t *rules;
- #if (NGX_HAVE_INET6)
- ngx_array_t *rules6;
- #endif
- #if (NGX_HAVE_UNIX_DOMAIN)
- ngx_array_t *rules_un;
- #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,
- ngx_stream_access_init,
- NULL,
- NULL,
- ngx_stream_access_create_srv_conf,
- ngx_stream_access_merge_srv_conf
- };
- ngx_module_t ngx_stream_access_module = {
- NGX_MODULE_V1,
- &ngx_stream_access_module_ctx,
- ngx_stream_access_commands,
- NGX_STREAM_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- 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 = (in_addr_t) 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
- 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;
- }
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