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// SPDX-License-Identifier: GPL-3.0-or-later
#define WEB_SERVER_INTERNALS 1
#include "web_server.h"
// this file includes 3 web servers:
//
// 1. single-threaded, based on select()
// 2. multi-threaded, based on poll() that spawns threads to handle the requests, based on select()
// 3. static-threaded, based on poll() using a fixed number of threads (configured at netdata.conf)
WEB_SERVER_MODE web_server_mode = WEB_SERVER_MODE_STATIC_THREADED;
// --------------------------------------------------------------------------------------
WEB_SERVER_MODE web_server_mode_id(const char *mode) {
if(!strcmp(mode, "none"))
return WEB_SERVER_MODE_NONE;
else if(!strcmp(mode, "single") || !strcmp(mode, "single-threaded"))
return WEB_SERVER_MODE_SINGLE_THREADED;
else if(!strcmp(mode, "static") || !strcmp(mode, "static-threaded"))
return WEB_SERVER_MODE_STATIC_THREADED;
else // if(!strcmp(mode, "multi") || !strcmp(mode, "multi-threaded"))
return WEB_SERVER_MODE_MULTI_THREADED;
}
const char *web_server_mode_name(WEB_SERVER_MODE id) {
switch(id) {
case WEB_SERVER_MODE_NONE:
return "none";
case WEB_SERVER_MODE_SINGLE_THREADED:
return "single-threaded";
case WEB_SERVER_MODE_STATIC_THREADED:
return "static-threaded";
default:
case WEB_SERVER_MODE_MULTI_THREADED:
return "multi-threaded";
}
}
// --------------------------------------------------------------------------------------
// API sockets
LISTEN_SOCKETS api_sockets = {
.config = &netdata_config,
.config_section = CONFIG_SECTION_WEB,
.default_bind_to = "*",
.default_port = API_LISTEN_PORT,
.backlog = API_LISTEN_BACKLOG
};
int api_listen_sockets_setup(void) {
int socks = listen_sockets_setup(&api_sockets);
if(!socks)
fatal("LISTENER: Cannot listen on any API socket. Exiting...");
return socks;
}
// --------------------------------------------------------------------------------------
// access lists
SIMPLE_PATTERN *web_allow_connections_from = NULL;
SIMPLE_PATTERN *web_allow_streaming_from = NULL;
SIMPLE_PATTERN *web_allow_netdataconf_from = NULL;
// WEB_CLIENT_ACL
SIMPLE_PATTERN *web_allow_dashboard_from = NULL;
SIMPLE_PATTERN *web_allow_registry_from = NULL;
SIMPLE_PATTERN *web_allow_badges_from = NULL;
void web_client_update_acl_matches(struct web_client *w) {
w->acl = WEB_CLIENT_ACL_NONE;
if(!web_allow_dashboard_from || simple_pattern_matches(web_allow_dashboard_from, w->client_ip))
w->acl |= WEB_CLIENT_ACL_DASHBOARD;
if(!web_allow_registry_from || simple_pattern_matches(web_allow_registry_from, w->client_ip))
w->acl |= WEB_CLIENT_ACL_REGISTRY;
if(!web_allow_badges_from || simple_pattern_matches(web_allow_badges_from, w->client_ip))
w->acl |= WEB_CLIENT_ACL_BADGE;
}
// --------------------------------------------------------------------------------------
void web_server_log_connection(struct web_client *w, const char *msg) {
log_access("%llu: %d '[%s]:%s' '%s'", w->id, gettid(), w->client_ip, w->client_port, msg);
}
// --------------------------------------------------------------------------------------
void web_client_initialize_connection(struct web_client *w) {
int flag = 1;
if(unlikely(web_client_check_tcp(w) && setsockopt(w->ifd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int)) != 0))
debug(D_WEB_CLIENT, "%llu: failed to enable TCP_NODELAY on socket fd %d.", w->id, w->ifd);
flag = 1;
if(unlikely(setsockopt(w->ifd, SOL_SOCKET, SO_KEEPALIVE, (char *) &flag, sizeof(int)) != 0))
debug(D_WEB_CLIENT, "%llu: failed to enable SO_KEEPALIVE on socket fd %d.", w->id, w->ifd);
web_client_update_acl_matches(w);
w->origin[0] = '*'; w->origin[1] = '\0';
w->cookie1[0] = '\0'; w->cookie2[0] = '\0';
freez(w->user_agent); w->user_agent = NULL;
web_client_enable_wait_receive(w);
web_server_log_connection(w, "CONNECTED");
web_client_cache_verify(0);
}
struct web_client *web_client_create_on_listenfd(int listener) {
struct web_client *w;
w = web_client_get_from_cache_or_allocate();
w->ifd = w->ofd = accept_socket(listener, SOCK_NONBLOCK, w->client_ip, sizeof(w->client_ip), w->client_port, sizeof(w->client_port), web_allow_connections_from);
if(unlikely(!*w->client_ip)) strcpy(w->client_ip, "-");
if(unlikely(!*w->client_port)) strcpy(w->client_port, "-");
if (w->ifd == -1) {
if(errno == EPERM)
web_server_log_connection(w, "ACCESS DENIED");
else {
web_server_log_connection(w, "CONNECTION FAILED");
error("%llu: Failed to accept new incoming connection.", w->id);
}
web_client_release(w);
return NULL;
}
web_client_initialize_connection(w);
return(w);
}
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