nginx/src/http/ngx_http.c

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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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#include <ngx_http.h>
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static char *ngx_http_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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int ngx_http_max_module;
ngx_uint_t ngx_http_total_requests;
uint64_t ngx_http_total_sent;
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int (*ngx_http_top_header_filter) (ngx_http_request_t *r);
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int (*ngx_http_top_body_filter) (ngx_http_request_t *r, ngx_chain_t *ch);
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static ngx_str_t http_name = ngx_string("http");
static ngx_command_t ngx_http_commands[] = {
{ngx_string("http"),
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NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
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ngx_http_block,
0,
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0,
NULL},
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ngx_null_command
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};
ngx_module_t ngx_http_module = {
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NGX_MODULE,
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&http_name, /* module context */
ngx_http_commands, /* module directives */
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NGX_CORE_MODULE, /* module type */
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NULL, /* init module */
NULL /* init child */
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};
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static char *ngx_http_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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{
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int mi, m, s, l, p, a, n;
int port_found, addr_found, virtual_names;
char *rv;
struct sockaddr_in *addr_in;
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ngx_conf_t pcf;
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ngx_array_t in_ports;
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ngx_listening_t *ls;
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ngx_http_listen_t *lscf;
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ngx_http_module_t *module;
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ngx_http_handler_pt *h;
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ngx_http_conf_ctx_t *ctx;
ngx_http_in_port_t *in_port, *inport;
ngx_http_in_addr_t *in_addr, *inaddr;
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ngx_http_server_name_t *s_name, *name;
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ngx_http_core_srv_conf_t **cscfp, *cscf;
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ngx_http_core_loc_conf_t **clcfp, *clcf;
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ngx_http_core_main_conf_t *cmcf;
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#if (WIN32)
ngx_iocp_conf_t *iocpcf;
#endif
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/* the main http context */
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ngx_test_null(ctx,
ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t)),
NGX_CONF_ERROR);
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*(ngx_http_conf_ctx_t **) conf = ctx;
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/* count the number of the http modules and set up their indices */
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ngx_http_max_module = 0;
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for (m = 0; ngx_modules[m]; m++) {
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if (ngx_modules[m]->type != NGX_HTTP_MODULE) {
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continue;
}
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ngx_modules[m]->ctx_index = ngx_http_max_module++;
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}
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/* the main http main_conf, it's the same in the all http contexts */
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ngx_test_null(ctx->main_conf,
ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module),
NGX_CONF_ERROR);
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/* the http null srv_conf, it's used to merge the server{}s' srv_conf's */
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ngx_test_null(ctx->srv_conf,
ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module),
NGX_CONF_ERROR);
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/* the http null loc_conf, it's used to merge the server{}s' loc_conf's */
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ngx_test_null(ctx->loc_conf,
ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module),
NGX_CONF_ERROR);
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/* create the main_conf, srv_conf and loc_conf in all http modules */
for (m = 0; ngx_modules[m]; m++) {
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if (ngx_modules[m]->type != NGX_HTTP_MODULE) {
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continue;
}
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module = ngx_modules[m]->ctx;
mi = ngx_modules[m]->ctx_index;
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if (module->pre_conf) {
if (module->pre_conf(cf) != NGX_OK) {
return NGX_CONF_ERROR;
}
}
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if (module->create_main_conf) {
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ngx_test_null(ctx->main_conf[mi], module->create_main_conf(cf),
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NGX_CONF_ERROR);
}
if (module->create_srv_conf) {
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ngx_test_null(ctx->srv_conf[mi], module->create_srv_conf(cf),
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NGX_CONF_ERROR);
}
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if (module->create_loc_conf) {
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ngx_test_null(ctx->loc_conf[mi], module->create_loc_conf(cf),
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NGX_CONF_ERROR);
}
}
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/* parse inside the http{} block */
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pcf = *cf;
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cf->ctx = ctx;
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cf->module_type = NGX_HTTP_MODULE;
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cf->cmd_type = NGX_HTTP_MAIN_CONF;
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rv = ngx_conf_parse(cf, NULL);
if (rv != NGX_CONF_OK) {
*cf = pcf;
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return rv;
}
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/*
* init http{} main_conf's, merge the server{}s' srv_conf's
* and its location{}s' loc_conf's
*/
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cmcf = ctx->main_conf[ngx_http_core_module.ctx_index];
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cscfp = cmcf->servers.elts;
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for (m = 0; ngx_modules[m]; m++) {
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if (ngx_modules[m]->type != NGX_HTTP_MODULE) {
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continue;
}
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module = ngx_modules[m]->ctx;
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mi = ngx_modules[m]->ctx_index;
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/* init http{} main_conf's */
if (module->init_main_conf) {
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rv = module->init_main_conf(cf, ctx->main_conf[mi]);
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if (rv != NGX_CONF_OK) {
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*cf = pcf;
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return rv;
}
}
for (s = 0; s < cmcf->servers.nelts; s++) {
/* merge the server{}s' srv_conf's */
if (module->merge_srv_conf) {
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rv = module->merge_srv_conf(cf,
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ctx->srv_conf[mi],
cscfp[s]->ctx->srv_conf[mi]);
if (rv != NGX_CONF_OK) {
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*cf = pcf;
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return rv;
}
}
if (module->merge_loc_conf) {
/* merge the server{}'s loc_conf */
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rv = module->merge_loc_conf(cf,
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ctx->loc_conf[mi],
cscfp[s]->ctx->loc_conf[mi]);
if (rv != NGX_CONF_OK) {
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*cf = pcf;
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return rv;
}
/* merge the locations{}' loc_conf's */
clcfp = (ngx_http_core_loc_conf_t **)cscfp[s]->locations.elts;
for (l = 0; l < cscfp[s]->locations.nelts; l++) {
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rv = module->merge_loc_conf(cf,
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cscfp[s]->ctx->loc_conf[mi],
clcfp[l]->loc_conf[mi]);
if (rv != NGX_CONF_OK) {
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*cf = pcf;
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return rv;
}
}
}
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}
}
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/* we needed "http"'s cf->ctx while merging configuration */
*cf = pcf;
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/* init lists of the handlers */
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ngx_init_array(cmcf->phases[NGX_HTTP_REWRITE_PHASE].handlers,
cf->cycle->pool, 10, sizeof(ngx_http_handler_pt),
NGX_CONF_ERROR);
cmcf->phases[NGX_HTTP_REWRITE_PHASE].type = NGX_OK;
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ngx_init_array(cmcf->phases[NGX_HTTP_FIND_CONFIG_PHASE].handlers,
cf->cycle->pool, 1, sizeof(ngx_http_handler_pt),
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NGX_CONF_ERROR);
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cmcf->phases[NGX_HTTP_FIND_CONFIG_PHASE].type = NGX_OK;
ngx_test_null(h, ngx_push_array(
&cmcf->phases[NGX_HTTP_FIND_CONFIG_PHASE].handlers),
NGX_CONF_ERROR);
*h = ngx_http_find_location_config;
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ngx_init_array(cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers,
cf->cycle->pool, 10, sizeof(ngx_http_handler_pt),
NGX_CONF_ERROR);
cmcf->phases[NGX_HTTP_CONTENT_PHASE].type = NGX_OK;
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/*
* create the lists of the ports, the addresses and the server names
* to allow quickly find the server core module configuration at run-time
*/
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ngx_init_array(in_ports, cf->pool, 10, sizeof(ngx_http_in_port_t),
NGX_CONF_ERROR);
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/* "server" directives */
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cscfp = cmcf->servers.elts;
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for (s = 0; s < cmcf->servers.nelts; s++) {
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/* "listen" directives */
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lscf = cscfp[s]->listen.elts;
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for (l = 0; l < cscfp[s]->listen.nelts; l++) {
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port_found = 0;
/* AF_INET only */
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in_port = in_ports.elts;
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for (p = 0; p < in_ports.nelts; p++) {
if (lscf[l].port == in_port[p].port) {
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/* the port is already in the port list */
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port_found = 1;
addr_found = 0;
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in_addr = in_port[p].addrs.elts;
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for (a = 0; a < in_port[p].addrs.nelts; a++) {
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if (lscf[l].addr == in_addr[a].addr) {
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/* the address is already bound to this port */
/* "server_name" directives */
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s_name = cscfp[s]->server_names.elts;
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for (n = 0; n < cscfp[s]->server_names.nelts; n++) {
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/*
* add the server name and server core module
* configuration to the address:port
*/
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/* TODO: duplicate names can be checked here */
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ngx_test_null(name,
ngx_push_array(&in_addr[a].names),
NGX_CONF_ERROR);
name->name = s_name[n].name;
name->core_srv_conf = s_name[n].core_srv_conf;
}
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/*
* check duplicate "default" server that
* serves this address:port
*/
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if (lscf[l].flags & NGX_HTTP_DEFAULT_SERVER) {
if (in_addr[a].flags
& NGX_HTTP_DEFAULT_SERVER) {
ngx_log_error(NGX_LOG_ERR, cf->log, 0,
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"duplicate default server in %s:%d",
lscf[l].file_name.data,
lscf[l].line);
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return NGX_CONF_ERROR;
}
in_addr[a].flags |= NGX_HTTP_DEFAULT_SERVER;
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in_addr[a].core_srv_conf = cscfp[s];
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}
addr_found = 1;
break;
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} else if (in_addr[a].addr == INADDR_ANY) {
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/*
* "*:port" must be the last resort so move it
* to the end of the address list and add
* the new address at its place
*/
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ngx_test_null(inaddr,
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ngx_push_array(&in_port[p].addrs),
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NGX_CONF_ERROR);
ngx_memcpy(inaddr, &in_addr[a],
sizeof(ngx_http_in_addr_t));
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in_addr[a].addr = lscf[l].addr;
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in_addr[a].flags = lscf[l].flags;
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in_addr[a].core_srv_conf = cscfp[s];
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/*
* create the empty list of the server names that
* can be served on this address:port
*/
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ngx_init_array(inaddr->names, cf->pool, 10,
sizeof(ngx_http_server_name_t),
NGX_CONF_ERROR);
addr_found = 1;
break;
}
}
if (!addr_found) {
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/*
* add the address to the addresses list that
* bound to this port
*/
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ngx_test_null(inaddr,
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ngx_push_array(&in_port[p].addrs),
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NGX_CONF_ERROR);
inaddr->addr = lscf[l].addr;
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inaddr->flags = lscf[l].flags;
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inaddr->core_srv_conf = cscfp[s];
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/*
* create the empty list of the server names that
* can be served on this address:port
*/
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ngx_init_array(inaddr->names, cf->pool, 10,
sizeof(ngx_http_server_name_t),
NGX_CONF_ERROR);
}
}
}
if (!port_found) {
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/* add the port to the in_port list */
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ngx_test_null(in_port,
ngx_push_array(&in_ports),
NGX_CONF_ERROR);
in_port->port = lscf[l].port;
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ngx_test_null(in_port->port_name.data, ngx_palloc(cf->pool, 7),
NGX_CONF_ERROR);
in_port->port_name.len = ngx_snprintf(in_port->port_name.data,
7, ":%d",
in_port->port);
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/* create list of the addresses that bound to this port ... */
ngx_init_array(in_port->addrs, cf->pool, 10,
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sizeof(ngx_http_in_addr_t),
NGX_CONF_ERROR);
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ngx_test_null(inaddr, ngx_push_array(&in_port->addrs),
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NGX_CONF_ERROR);
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/* ... and add the address to this list */
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inaddr->addr = lscf[l].addr;
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inaddr->flags = lscf[l].flags;
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inaddr->core_srv_conf = cscfp[s];
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/*
* create the empty list of the server names that
* can be served on this address:port
*/
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ngx_init_array(inaddr->names, cf->pool, 10,
sizeof(ngx_http_server_name_t),
NGX_CONF_ERROR);
}
}
}
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/* optimize the lists of the ports, the addresses and the server names */
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/* AF_INET only */
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in_port = in_ports.elts;
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for (p = 0; p < in_ports.nelts; p++) {
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/* check whether the all server names point to the same server */
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in_addr = in_port[p].addrs.elts;
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for (a = 0; a < in_port[p].addrs.nelts; a++) {
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virtual_names = 0;
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name = in_addr[a].names.elts;
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for (n = 0; n < in_addr[a].names.nelts; n++) {
if (in_addr[a].core_srv_conf != name[n].core_srv_conf) {
virtual_names = 1;
break;
}
}
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/*
* if the all server names point to the same server
* then we do not need to check them at run-time
*/
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if (!virtual_names) {
in_addr[a].names.nelts = 0;
}
}
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/*
* if there's the binding to "*:port" then we need to bind()
* to "*:port" only and ignore the other bindings
*/
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if (in_addr[a - 1].addr == INADDR_ANY) {
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a--;
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} else {
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a = 0;
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}
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in_addr = in_port[p].addrs.elts;
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while (a < in_port[p].addrs.nelts) {
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ngx_test_null(ls, ngx_push_array(&cf->cycle->listening),
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NGX_CONF_ERROR);
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ngx_memzero(ls, sizeof(ngx_listening_t));
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ngx_test_null(addr_in,
ngx_pcalloc(cf->pool, sizeof(struct sockaddr_in)),
NGX_CONF_ERROR);
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#if (HAVE_SIN_LEN)
addr_in->sin_len = sizeof(struct sockaddr_in);
#endif
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addr_in->sin_family = AF_INET;
addr_in->sin_addr.s_addr = in_addr[a].addr;
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addr_in->sin_port = htons((u_short) in_port[p].port);
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ngx_test_null(ls->addr_text.data,
ngx_palloc(cf->pool, INET_ADDRSTRLEN + 6),
NGX_CONF_ERROR);
ls->addr_text.len =
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ngx_snprintf(ls->addr_text.data
+ ngx_inet_ntop(AF_INET,
(char *) &in_addr[a].addr,
ls->addr_text.data,
INET_ADDRSTRLEN),
6, ":%d", in_port[p].port);
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ls->fd = -1;
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ls->family = AF_INET;
ls->type = SOCK_STREAM;
ls->protocol = IPPROTO_IP;
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#if (WIN32)
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ls->flags = WSA_FLAG_OVERLAPPED;
#endif
ls->sockaddr = (struct sockaddr *) addr_in;
ls->socklen = sizeof(struct sockaddr_in);
ls->addr = offsetof(struct sockaddr_in, sin_addr);
ls->addr_text_max_len = INET_ADDRSTRLEN;
ls->backlog = -1;
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#if 0
#if 0
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ls->nonblocking = 1;
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#else
ls->nonblocking = 0;
#endif
#endif
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ls->handler = ngx_http_init_connection;
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cscf = in_addr[a].core_srv_conf;
ls->pool_size = cscf->connection_pool_size;
ls->post_accept_timeout = cscf->post_accept_timeout;
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clcf = cscf->ctx->loc_conf[ngx_http_core_module.ctx_index];
ls->log = clcf->err_log;
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#if (WIN32)
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iocpcf = ngx_event_get_conf(cf->cycle->conf_ctx, ngx_iocp_module);
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if (iocpcf->acceptex_read) {
ls->post_accept_buffer_size = cscf->client_header_buffer_size;
}
#endif
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ls->ctx = ctx;
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if (in_port[p].addrs.nelts > 1) {
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in_addr = in_port[p].addrs.elts;
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if (in_addr[in_port[p].addrs.nelts - 1].addr != INADDR_ANY) {
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/*
* if this port has not the "*:port" binding then create
* the separate ngx_http_in_port_t for the all bindings
*/
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ngx_test_null(inport,
ngx_palloc(cf->pool,
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sizeof(ngx_http_in_port_t)),
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NGX_CONF_ERROR);
inport->port = in_port[p].port;
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inport->port_name = in_port[p].port_name;
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/* init list of the addresses ... */
ngx_init_array(inport->addrs, cf->pool, 1,
sizeof(ngx_http_in_addr_t),
NGX_CONF_ERROR);
/* ... and set up it with the first address */
inport->addrs.nelts = 1;
inport->addrs.elts = in_port[p].addrs.elts;
ls->servers = inport;
/* prepare for the next cycle */
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in_port[p].addrs.elts = (char *) in_port[p].addrs.elts
+ in_port[p].addrs.size;
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in_port[p].addrs.nelts--;
in_addr = (ngx_http_in_addr_t *) in_port[p].addrs.elts;
a = 0;
continue;
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}
}
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ls->servers = &in_port[p];
a++;
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}
}
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/* DEBUG STUFF */
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in_port = in_ports.elts;
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for (p = 0; p < in_ports.nelts; p++) {
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ngx_log_debug(cf->log, "port: %d %08x" _ in_port[p].port _ &in_port[p]);
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in_addr = in_port[p].addrs.elts;
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for (a = 0; a < in_port[p].addrs.nelts; a++) {
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char ip[20];
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ngx_inet_ntop(AF_INET, (char *) &in_addr[a].addr, ip, 20);
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ngx_log_debug(cf->log, "%s %08x" _ ip _ in_addr[a].core_srv_conf);
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s_name = in_addr[a].names.elts;
for (n = 0; n < in_addr[a].names.nelts; n++) {
ngx_log_debug(cf->log, "%s %08x" _ s_name[n].name.data _
s_name[n].core_srv_conf);
}
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}
}
/**/
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return NGX_CONF_OK;
}