Messages like "fwrite() failed: Connection reset by peer" are no help whatsoever, especially since they can be caused simply by a client disconnecting. * Make those WARNINGs DEBUGs. * Check the return from ast_iostream_printf of headers. Change-Id: I17bd5f3621514152a7b2b263c801324c5e96568b
2311 lines
61 KiB
C
2311 lines
61 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 1999 - 2006, Digium, Inc.
|
|
*
|
|
* Mark Spencer <markster@digium.com>
|
|
*
|
|
* See http://www.asterisk.org for more information about
|
|
* the Asterisk project. Please do not directly contact
|
|
* any of the maintainers of this project for assistance;
|
|
* the project provides a web site, mailing lists and IRC
|
|
* channels for your use.
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
* at the top of the source tree.
|
|
*/
|
|
|
|
/*!
|
|
* \file
|
|
* \brief http server for AMI access
|
|
*
|
|
* \author Mark Spencer <markster@digium.com>
|
|
*
|
|
* This program implements a tiny http server
|
|
* and was inspired by micro-httpd by Jef Poskanzer
|
|
*
|
|
* GMime http://spruce.sourceforge.net/gmime/
|
|
*
|
|
* \ref AstHTTP - AMI over the http protocol
|
|
*/
|
|
|
|
/*! \li \ref http.c uses the configuration file \ref http.conf
|
|
* \addtogroup configuration_file
|
|
*/
|
|
|
|
/*! \page http.conf http.conf
|
|
* \verbinclude http.conf.sample
|
|
*/
|
|
|
|
/*** MODULEINFO
|
|
<support_level>core</support_level>
|
|
***/
|
|
|
|
#include "asterisk.h"
|
|
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <sys/stat.h>
|
|
#include <signal.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "asterisk/paths.h" /* use ast_config_AST_DATA_DIR */
|
|
#include "asterisk/cli.h"
|
|
#include "asterisk/tcptls.h"
|
|
#include "asterisk/http.h"
|
|
#include "asterisk/utils.h"
|
|
#include "asterisk/strings.h"
|
|
#include "asterisk/config.h"
|
|
#include "asterisk/stringfields.h"
|
|
#include "asterisk/ast_version.h"
|
|
#include "asterisk/manager.h"
|
|
#include "asterisk/_private.h"
|
|
#include "asterisk/astobj2.h"
|
|
#include "asterisk/netsock2.h"
|
|
#include "asterisk/json.h"
|
|
|
|
#define MAX_PREFIX 80
|
|
#define DEFAULT_PORT 8088
|
|
#define DEFAULT_TLS_PORT 8089
|
|
#define DEFAULT_SESSION_LIMIT 100
|
|
/*! (ms) Idle time waiting for data. */
|
|
#define DEFAULT_SESSION_INACTIVITY 30000
|
|
/*! (ms) Min timeout for initial HTTP request to start coming in. */
|
|
#define MIN_INITIAL_REQUEST_TIMEOUT 10000
|
|
/*! (ms) Idle time between HTTP requests */
|
|
#define DEFAULT_SESSION_KEEP_ALIVE 15000
|
|
/*! Max size for the http server name */
|
|
#define MAX_SERVER_NAME_LENGTH 128
|
|
/*! Max size for the http response header */
|
|
#define DEFAULT_RESPONSE_HEADER_LENGTH 512
|
|
|
|
/*! Maximum application/json or application/x-www-form-urlencoded body content length. */
|
|
#if !defined(LOW_MEMORY)
|
|
#define MAX_CONTENT_LENGTH 4096
|
|
#else
|
|
#define MAX_CONTENT_LENGTH 1024
|
|
#endif /* !defined(LOW_MEMORY) */
|
|
|
|
/*! Maximum line length for HTTP requests. */
|
|
#if !defined(LOW_MEMORY)
|
|
#define MAX_HTTP_LINE_LENGTH 4096
|
|
#else
|
|
#define MAX_HTTP_LINE_LENGTH 1024
|
|
#endif /* !defined(LOW_MEMORY) */
|
|
|
|
static char http_server_name[MAX_SERVER_NAME_LENGTH];
|
|
|
|
static int session_limit = DEFAULT_SESSION_LIMIT;
|
|
static int session_inactivity = DEFAULT_SESSION_INACTIVITY;
|
|
static int session_keep_alive = DEFAULT_SESSION_KEEP_ALIVE;
|
|
static int session_count = 0;
|
|
|
|
static struct ast_tls_config http_tls_cfg;
|
|
|
|
static void *httpd_helper_thread(void *arg);
|
|
|
|
/*!
|
|
* we have up to two accepting threads, one for http, one for https
|
|
*/
|
|
static struct ast_tcptls_session_args http_desc = {
|
|
.accept_fd = -1,
|
|
.master = AST_PTHREADT_NULL,
|
|
.tls_cfg = NULL,
|
|
.poll_timeout = -1,
|
|
.name = "http server",
|
|
.accept_fn = ast_tcptls_server_root,
|
|
.worker_fn = httpd_helper_thread,
|
|
};
|
|
|
|
static struct ast_tcptls_session_args https_desc = {
|
|
.accept_fd = -1,
|
|
.master = AST_PTHREADT_NULL,
|
|
.tls_cfg = &http_tls_cfg,
|
|
.poll_timeout = -1,
|
|
.name = "https server",
|
|
.accept_fn = ast_tcptls_server_root,
|
|
.worker_fn = httpd_helper_thread,
|
|
};
|
|
|
|
static AST_RWLIST_HEAD_STATIC(uris, ast_http_uri); /*!< list of supported handlers */
|
|
|
|
/* all valid URIs must be prepended by the string in prefix. */
|
|
static char prefix[MAX_PREFIX];
|
|
static int enablestatic;
|
|
|
|
/*! \brief Limit the kinds of files we're willing to serve up */
|
|
static struct {
|
|
const char *ext;
|
|
const char *mtype;
|
|
} mimetypes[] = {
|
|
{ "png", "image/png" },
|
|
{ "xml", "text/xml" },
|
|
{ "jpg", "image/jpeg" },
|
|
{ "js", "application/x-javascript" },
|
|
{ "wav", "audio/x-wav" },
|
|
{ "mp3", "audio/mpeg" },
|
|
{ "svg", "image/svg+xml" },
|
|
{ "svgz", "image/svg+xml" },
|
|
{ "gif", "image/gif" },
|
|
{ "html", "text/html" },
|
|
{ "htm", "text/html" },
|
|
{ "css", "text/css" },
|
|
{ "cnf", "text/plain" },
|
|
{ "cfg", "text/plain" },
|
|
{ "bin", "application/octet-stream" },
|
|
{ "sbn", "application/octet-stream" },
|
|
{ "ld", "application/octet-stream" },
|
|
};
|
|
|
|
struct http_uri_redirect {
|
|
AST_LIST_ENTRY(http_uri_redirect) entry;
|
|
char *dest;
|
|
char target[0];
|
|
};
|
|
|
|
static AST_RWLIST_HEAD_STATIC(uri_redirects, http_uri_redirect);
|
|
|
|
static const struct ast_cfhttp_methods_text {
|
|
enum ast_http_method method;
|
|
const char *text;
|
|
} ast_http_methods_text[] = {
|
|
{ AST_HTTP_UNKNOWN, "UNKNOWN" },
|
|
{ AST_HTTP_GET, "GET" },
|
|
{ AST_HTTP_POST, "POST" },
|
|
{ AST_HTTP_HEAD, "HEAD" },
|
|
{ AST_HTTP_PUT, "PUT" },
|
|
{ AST_HTTP_DELETE, "DELETE" },
|
|
{ AST_HTTP_OPTIONS, "OPTIONS" },
|
|
};
|
|
|
|
const char *ast_get_http_method(enum ast_http_method method)
|
|
{
|
|
int x;
|
|
|
|
for (x = 0; x < ARRAY_LEN(ast_http_methods_text); x++) {
|
|
if (ast_http_methods_text[x].method == method) {
|
|
return ast_http_methods_text[x].text;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
const char *ast_http_ftype2mtype(const char *ftype)
|
|
{
|
|
int x;
|
|
|
|
if (ftype) {
|
|
for (x = 0; x < ARRAY_LEN(mimetypes); x++) {
|
|
if (!strcasecmp(ftype, mimetypes[x].ext)) {
|
|
return mimetypes[x].mtype;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
uint32_t ast_http_manid_from_vars(struct ast_variable *headers)
|
|
{
|
|
uint32_t mngid = 0;
|
|
struct ast_variable *v, *cookies;
|
|
|
|
cookies = ast_http_get_cookies(headers);
|
|
for (v = cookies; v; v = v->next) {
|
|
if (!strcasecmp(v->name, "mansession_id")) {
|
|
sscanf(v->value, "%30x", &mngid);
|
|
break;
|
|
}
|
|
}
|
|
ast_variables_destroy(cookies);
|
|
return mngid;
|
|
}
|
|
|
|
void ast_http_prefix(char *buf, int len)
|
|
{
|
|
if (buf) {
|
|
ast_copy_string(buf, prefix, len);
|
|
}
|
|
}
|
|
|
|
static int static_callback(struct ast_tcptls_session_instance *ser,
|
|
const struct ast_http_uri *urih, const char *uri,
|
|
enum ast_http_method method, struct ast_variable *get_vars,
|
|
struct ast_variable *headers)
|
|
{
|
|
char *path;
|
|
const char *ftype;
|
|
const char *mtype;
|
|
char wkspace[80];
|
|
struct stat st;
|
|
int len;
|
|
int fd;
|
|
struct ast_str *http_header;
|
|
struct timeval tv;
|
|
struct ast_tm tm;
|
|
char timebuf[80], etag[23];
|
|
struct ast_variable *v;
|
|
int not_modified = 0;
|
|
|
|
if (method != AST_HTTP_GET && method != AST_HTTP_HEAD) {
|
|
ast_http_error(ser, 501, "Not Implemented", "Attempt to use unimplemented / unsupported method");
|
|
return 0;
|
|
}
|
|
|
|
/* Yuck. I'm not really sold on this, but if you don't deliver static content it makes your configuration
|
|
substantially more challenging, but this seems like a rather irritating feature creep on Asterisk. */
|
|
if (!enablestatic || ast_strlen_zero(uri)) {
|
|
goto out403;
|
|
}
|
|
|
|
/* Disallow any funny filenames at all (checking first character only??) */
|
|
if ((uri[0] < 33) || strchr("./|~@#$%^&*() \t", uri[0])) {
|
|
goto out403;
|
|
}
|
|
|
|
if (strstr(uri, "/..")) {
|
|
goto out403;
|
|
}
|
|
|
|
if ((ftype = strrchr(uri, '.'))) {
|
|
ftype++;
|
|
}
|
|
|
|
if (!(mtype = ast_http_ftype2mtype(ftype))) {
|
|
snprintf(wkspace, sizeof(wkspace), "text/%s", S_OR(ftype, "plain"));
|
|
mtype = wkspace;
|
|
}
|
|
|
|
/* Cap maximum length */
|
|
if ((len = strlen(uri) + strlen(ast_config_AST_DATA_DIR) + strlen("/static-http/") + 5) > 1024) {
|
|
goto out403;
|
|
}
|
|
|
|
path = ast_alloca(len);
|
|
sprintf(path, "%s/static-http/%s", ast_config_AST_DATA_DIR, uri);
|
|
if (stat(path, &st)) {
|
|
goto out404;
|
|
}
|
|
|
|
if (S_ISDIR(st.st_mode)) {
|
|
goto out404;
|
|
}
|
|
|
|
if (strstr(path, "/private/") && !astman_is_authed(ast_http_manid_from_vars(headers))) {
|
|
goto out403;
|
|
}
|
|
|
|
fd = open(path, O_RDONLY);
|
|
if (fd < 0) {
|
|
goto out403;
|
|
}
|
|
|
|
/* make "Etag:" http header value */
|
|
snprintf(etag, sizeof(etag), "\"%ld\"", (long)st.st_mtime);
|
|
|
|
/* make "Last-Modified:" http header value */
|
|
tv.tv_sec = st.st_mtime;
|
|
tv.tv_usec = 0;
|
|
ast_strftime(timebuf, sizeof(timebuf), "%a, %d %b %Y %H:%M:%S GMT", ast_localtime(&tv, &tm, "GMT"));
|
|
|
|
/* check received "If-None-Match" request header and Etag value for file */
|
|
for (v = headers; v; v = v->next) {
|
|
if (!strcasecmp(v->name, "If-None-Match")) {
|
|
if (!strcasecmp(v->value, etag)) {
|
|
not_modified = 1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
http_header = ast_str_create(255);
|
|
if (!http_header) {
|
|
ast_http_request_close_on_completion(ser);
|
|
ast_http_error(ser, 500, "Server Error", "Out of memory");
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
|
|
ast_str_set(&http_header, 0, "Content-type: %s\r\n"
|
|
"ETag: %s\r\n"
|
|
"Last-Modified: %s\r\n",
|
|
mtype,
|
|
etag,
|
|
timebuf);
|
|
|
|
/* ast_http_send() frees http_header, so we don't need to do it before returning */
|
|
if (not_modified) {
|
|
ast_http_send(ser, method, 304, "Not Modified", http_header, NULL, 0, 1);
|
|
} else {
|
|
ast_http_send(ser, method, 200, NULL, http_header, NULL, fd, 1); /* static content flag is set */
|
|
}
|
|
close(fd);
|
|
return 0;
|
|
|
|
out404:
|
|
ast_http_error(ser, 404, "Not Found", "The requested URL was not found on this server.");
|
|
return 0;
|
|
|
|
out403:
|
|
ast_http_request_close_on_completion(ser);
|
|
ast_http_error(ser, 403, "Access Denied", "You do not have permission to access the requested URL.");
|
|
return 0;
|
|
}
|
|
|
|
static int httpstatus_callback(struct ast_tcptls_session_instance *ser,
|
|
const struct ast_http_uri *urih, const char *uri,
|
|
enum ast_http_method method, struct ast_variable *get_vars,
|
|
struct ast_variable *headers)
|
|
{
|
|
struct ast_str *out;
|
|
struct ast_variable *v, *cookies = NULL;
|
|
|
|
if (method != AST_HTTP_GET && method != AST_HTTP_HEAD) {
|
|
ast_http_error(ser, 501, "Not Implemented", "Attempt to use unimplemented / unsupported method");
|
|
return 0;
|
|
}
|
|
|
|
out = ast_str_create(512);
|
|
if (!out) {
|
|
ast_http_request_close_on_completion(ser);
|
|
ast_http_error(ser, 500, "Server Error", "Out of memory");
|
|
return 0;
|
|
}
|
|
|
|
ast_str_append(&out, 0,
|
|
"<html><title>Asterisk HTTP Status</title>\r\n"
|
|
"<body bgcolor=\"#ffffff\">\r\n"
|
|
"<table bgcolor=\"#f1f1f1\" align=\"center\"><tr><td bgcolor=\"#e0e0ff\" colspan=\"2\" width=\"500\">\r\n"
|
|
"<h2> Asterisk™ HTTP Status</h2></td></tr>\r\n");
|
|
|
|
ast_str_append(&out, 0, "<tr><td><i>Server</i></td><td><b>%s</b></td></tr>\r\n", http_server_name);
|
|
ast_str_append(&out, 0, "<tr><td><i>Prefix</i></td><td><b>%s</b></td></tr>\r\n", prefix);
|
|
ast_str_append(&out, 0, "<tr><td><i>Bind Address</i></td><td><b>%s</b></td></tr>\r\n",
|
|
ast_sockaddr_stringify_addr(&http_desc.old_address));
|
|
ast_str_append(&out, 0, "<tr><td><i>Bind Port</i></td><td><b>%s</b></td></tr>\r\n",
|
|
ast_sockaddr_stringify_port(&http_desc.old_address));
|
|
if (http_tls_cfg.enabled) {
|
|
ast_str_append(&out, 0, "<tr><td><i>SSL Bind Port</i></td><td><b>%s</b></td></tr>\r\n",
|
|
ast_sockaddr_stringify_port(&https_desc.old_address));
|
|
}
|
|
ast_str_append(&out, 0, "<tr><td colspan=\"2\"><hr></td></tr>\r\n");
|
|
for (v = get_vars; v; v = v->next) {
|
|
ast_str_append(&out, 0, "<tr><td><i>Submitted GET Variable '%s'</i></td><td>%s</td></tr>\r\n", v->name, v->value);
|
|
}
|
|
ast_str_append(&out, 0, "<tr><td colspan=\"2\"><hr></td></tr>\r\n");
|
|
|
|
cookies = ast_http_get_cookies(headers);
|
|
for (v = cookies; v; v = v->next) {
|
|
ast_str_append(&out, 0, "<tr><td><i>Cookie '%s'</i></td><td>%s</td></tr>\r\n", v->name, v->value);
|
|
}
|
|
ast_variables_destroy(cookies);
|
|
|
|
ast_str_append(&out, 0, "</table><center><font size=\"-1\"><i>Asterisk and Digium are registered trademarks of Digium, Inc.</i></font></center></body></html>\r\n");
|
|
ast_http_send(ser, method, 200, NULL, NULL, out, 0, 0);
|
|
return 0;
|
|
}
|
|
|
|
static struct ast_http_uri statusuri = {
|
|
.callback = httpstatus_callback,
|
|
.description = "Asterisk HTTP General Status",
|
|
.uri = "httpstatus",
|
|
.has_subtree = 0,
|
|
.data = NULL,
|
|
.key = __FILE__,
|
|
};
|
|
|
|
static struct ast_http_uri staticuri = {
|
|
.callback = static_callback,
|
|
.description = "Asterisk HTTP Static Delivery",
|
|
.uri = "static",
|
|
.has_subtree = 1,
|
|
.data = NULL,
|
|
.key= __FILE__,
|
|
};
|
|
|
|
enum http_private_flags {
|
|
/*! TRUE if the HTTP request has a body. */
|
|
HTTP_FLAG_HAS_BODY = (1 << 0),
|
|
/*! TRUE if the HTTP request body has been read. */
|
|
HTTP_FLAG_BODY_READ = (1 << 1),
|
|
/*! TRUE if the HTTP request must close when completed. */
|
|
HTTP_FLAG_CLOSE_ON_COMPLETION = (1 << 2),
|
|
};
|
|
|
|
/*! HTTP tcptls worker_fn private data. */
|
|
struct http_worker_private_data {
|
|
/*! Body length or -1 if chunked. Valid if HTTP_FLAG_HAS_BODY is TRUE. */
|
|
int body_length;
|
|
/*! HTTP body tracking flags */
|
|
struct ast_flags flags;
|
|
};
|
|
|
|
void ast_http_send(struct ast_tcptls_session_instance *ser,
|
|
enum ast_http_method method, int status_code, const char *status_title,
|
|
struct ast_str *http_header, struct ast_str *out, int fd,
|
|
unsigned int static_content)
|
|
{
|
|
struct timeval now = ast_tvnow();
|
|
struct ast_tm tm;
|
|
char timebuf[80];
|
|
char buf[256];
|
|
int len;
|
|
int content_length = 0;
|
|
int close_connection;
|
|
struct ast_str *server_header_field = ast_str_create(MAX_SERVER_NAME_LENGTH);
|
|
int send_content;
|
|
|
|
if (!ser || !server_header_field) {
|
|
/* The connection is not open. */
|
|
ast_free(http_header);
|
|
ast_free(out);
|
|
ast_free(server_header_field);
|
|
return;
|
|
}
|
|
|
|
if(!ast_strlen_zero(http_server_name)) {
|
|
ast_str_set(&server_header_field,
|
|
0,
|
|
"Server: %s\r\n",
|
|
http_server_name);
|
|
}
|
|
|
|
/*
|
|
* We shouldn't be sending non-final status codes to this
|
|
* function because we may close the connection before
|
|
* returning.
|
|
*/
|
|
ast_assert(200 <= status_code);
|
|
|
|
if (session_keep_alive <= 0) {
|
|
close_connection = 1;
|
|
} else {
|
|
struct http_worker_private_data *request;
|
|
|
|
request = ser->private_data;
|
|
if (!request
|
|
|| ast_test_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION)
|
|
|| ast_http_body_discard(ser)) {
|
|
close_connection = 1;
|
|
} else {
|
|
close_connection = 0;
|
|
}
|
|
}
|
|
|
|
ast_strftime(timebuf, sizeof(timebuf), "%a, %d %b %Y %H:%M:%S GMT", ast_localtime(&now, &tm, "GMT"));
|
|
|
|
/* calc content length */
|
|
if (out) {
|
|
content_length += ast_str_strlen(out);
|
|
}
|
|
|
|
if (fd) {
|
|
content_length += lseek(fd, 0, SEEK_END);
|
|
lseek(fd, 0, SEEK_SET);
|
|
}
|
|
|
|
send_content = method != AST_HTTP_HEAD || status_code >= 400;
|
|
|
|
/* send http header */
|
|
if (ast_iostream_printf(ser->stream,
|
|
"HTTP/1.1 %d %s\r\n"
|
|
"%s"
|
|
"Date: %s\r\n"
|
|
"%s"
|
|
"%s"
|
|
"%s"
|
|
"Content-Length: %d\r\n"
|
|
"\r\n"
|
|
"%s",
|
|
status_code, status_title ? status_title : "OK",
|
|
ast_str_buffer(server_header_field),
|
|
timebuf,
|
|
close_connection ? "Connection: close\r\n" : "",
|
|
static_content ? "" : "Cache-Control: no-cache, no-store\r\n",
|
|
http_header ? ast_str_buffer(http_header) : "",
|
|
content_length,
|
|
send_content && out && ast_str_strlen(out) ? ast_str_buffer(out) : ""
|
|
) <= 0) {
|
|
ast_debug(1, "ast_iostream_printf() failed: %s\n", strerror(errno));
|
|
close_connection = 1;
|
|
}
|
|
|
|
/* send content */
|
|
if (!close_connection && send_content && fd) {
|
|
while ((len = read(fd, buf, sizeof(buf))) > 0) {
|
|
if (ast_iostream_write(ser->stream, buf, len) != len) {
|
|
ast_debug(1, "ast_iostream_write() failed: %s\n", strerror(errno));
|
|
close_connection = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
ast_free(http_header);
|
|
ast_free(out);
|
|
ast_free(server_header_field);
|
|
|
|
if (close_connection) {
|
|
ast_debug(1, "HTTP closing session. status_code:%d\n", status_code);
|
|
ast_tcptls_close_session_file(ser);
|
|
} else {
|
|
ast_debug(1, "HTTP keeping session open. status_code:%d\n", status_code);
|
|
}
|
|
}
|
|
|
|
void ast_http_create_response(struct ast_tcptls_session_instance *ser, int status_code,
|
|
const char *status_title, struct ast_str *http_header_data, const char *text)
|
|
{
|
|
char server_name[MAX_SERVER_NAME_LENGTH];
|
|
struct ast_str *server_address = ast_str_create(MAX_SERVER_NAME_LENGTH);
|
|
struct ast_str *out = ast_str_create(MAX_CONTENT_LENGTH);
|
|
|
|
if (!http_header_data || !server_address || !out) {
|
|
ast_free(http_header_data);
|
|
ast_free(server_address);
|
|
ast_free(out);
|
|
if (ser) {
|
|
ast_debug(1, "HTTP closing session. OOM.\n");
|
|
ast_tcptls_close_session_file(ser);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if(!ast_strlen_zero(http_server_name)) {
|
|
ast_xml_escape(http_server_name, server_name, sizeof(server_name));
|
|
ast_str_set(&server_address,
|
|
0,
|
|
"<address>%s</address>\r\n",
|
|
server_name);
|
|
}
|
|
|
|
ast_str_set(&out,
|
|
0,
|
|
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\r\n"
|
|
"<html><head>\r\n"
|
|
"<title>%d %s</title>\r\n"
|
|
"</head><body>\r\n"
|
|
"<h1>%s</h1>\r\n"
|
|
"<p>%s</p>\r\n"
|
|
"<hr />\r\n"
|
|
"%s"
|
|
"</body></html>\r\n",
|
|
status_code,
|
|
status_title,
|
|
status_title,
|
|
text ? text : "",
|
|
ast_str_buffer(server_address));
|
|
|
|
ast_free(server_address);
|
|
|
|
ast_http_send(ser,
|
|
AST_HTTP_UNKNOWN,
|
|
status_code,
|
|
status_title,
|
|
http_header_data,
|
|
out,
|
|
0,
|
|
0);
|
|
}
|
|
|
|
void ast_http_auth(struct ast_tcptls_session_instance *ser, const char *realm,
|
|
const unsigned long nonce, const unsigned long opaque, int stale,
|
|
const char *text)
|
|
{
|
|
int status_code = 401;
|
|
char *status_title = "Unauthorized";
|
|
struct ast_str *http_header_data = ast_str_create(DEFAULT_RESPONSE_HEADER_LENGTH);
|
|
|
|
if (http_header_data) {
|
|
ast_str_set(&http_header_data,
|
|
0,
|
|
"WWW-authenticate: Digest algorithm=MD5, realm=\"%s\", nonce=\"%08lx\", qop=\"auth\", opaque=\"%08lx\"%s\r\n"
|
|
"Content-type: text/html\r\n",
|
|
realm ? realm : "Asterisk",
|
|
nonce,
|
|
opaque,
|
|
stale ? ", stale=true" : "");
|
|
}
|
|
|
|
ast_http_create_response(ser,
|
|
status_code,
|
|
status_title,
|
|
http_header_data,
|
|
text);
|
|
}
|
|
|
|
void ast_http_error(struct ast_tcptls_session_instance *ser, int status_code,
|
|
const char *status_title, const char *text)
|
|
{
|
|
struct ast_str *http_header_data = ast_str_create(DEFAULT_RESPONSE_HEADER_LENGTH);
|
|
|
|
if (http_header_data) {
|
|
ast_str_set(&http_header_data, 0, "Content-type: text/html\r\n");
|
|
}
|
|
|
|
ast_http_create_response(ser,
|
|
status_code,
|
|
status_title,
|
|
http_header_data,
|
|
text);
|
|
}
|
|
|
|
/*!
|
|
* \brief Link the new uri into the list.
|
|
*
|
|
* They are sorted by length of
|
|
* the string, not alphabetically. Duplicate entries are not replaced,
|
|
* but the insertion order (using <= and not just <) makes sure that
|
|
* more recent insertions hide older ones.
|
|
* On a lookup, we just scan the list and stop at the first matching entry.
|
|
*/
|
|
int ast_http_uri_link(struct ast_http_uri *urih)
|
|
{
|
|
struct ast_http_uri *uri;
|
|
int len = strlen(urih->uri);
|
|
|
|
AST_RWLIST_WRLOCK(&uris);
|
|
|
|
urih->prefix = prefix;
|
|
|
|
if ( AST_RWLIST_EMPTY(&uris) || strlen(AST_RWLIST_FIRST(&uris)->uri) <= len ) {
|
|
AST_RWLIST_INSERT_HEAD(&uris, urih, entry);
|
|
AST_RWLIST_UNLOCK(&uris);
|
|
return 0;
|
|
}
|
|
|
|
AST_RWLIST_TRAVERSE(&uris, uri, entry) {
|
|
if (AST_RWLIST_NEXT(uri, entry) &&
|
|
strlen(AST_RWLIST_NEXT(uri, entry)->uri) <= len) {
|
|
AST_RWLIST_INSERT_AFTER(&uris, uri, urih, entry);
|
|
AST_RWLIST_UNLOCK(&uris);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
AST_RWLIST_INSERT_TAIL(&uris, urih, entry);
|
|
|
|
AST_RWLIST_UNLOCK(&uris);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ast_http_uri_unlink(struct ast_http_uri *urih)
|
|
{
|
|
AST_RWLIST_WRLOCK(&uris);
|
|
AST_RWLIST_REMOVE(&uris, urih, entry);
|
|
AST_RWLIST_UNLOCK(&uris);
|
|
}
|
|
|
|
void ast_http_uri_unlink_all_with_key(const char *key)
|
|
{
|
|
struct ast_http_uri *urih;
|
|
AST_RWLIST_WRLOCK(&uris);
|
|
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&uris, urih, entry) {
|
|
if (!strcmp(urih->key, key)) {
|
|
AST_RWLIST_REMOVE_CURRENT(entry);
|
|
if (urih->dmallocd) {
|
|
ast_free(urih->data);
|
|
}
|
|
if (urih->mallocd) {
|
|
ast_free(urih);
|
|
}
|
|
}
|
|
}
|
|
AST_RWLIST_TRAVERSE_SAFE_END;
|
|
AST_RWLIST_UNLOCK(&uris);
|
|
}
|
|
|
|
/*!
|
|
* \brief Retrieves the header with the given field name.
|
|
*
|
|
* \param headers Headers to search.
|
|
* \param field_name Name of the header to find.
|
|
* \return Associated header value.
|
|
* \return \c NULL if header is not present.
|
|
*/
|
|
static const char *get_header(struct ast_variable *headers, const char *field_name)
|
|
{
|
|
struct ast_variable *v;
|
|
|
|
for (v = headers; v; v = v->next) {
|
|
if (!strcasecmp(v->name, field_name)) {
|
|
return v->value;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*!
|
|
* \brief Retrieves the content type specified in the "Content-Type" header.
|
|
*
|
|
* This function only returns the "type/subtype" and any trailing parameter is
|
|
* not included.
|
|
*
|
|
* \note the return value is an allocated string that needs to be freed.
|
|
*
|
|
* \retval the content type/subtype or NULL if the header is not found.
|
|
*/
|
|
static char *get_content_type(struct ast_variable *headers)
|
|
{
|
|
const char *content_type = get_header(headers, "Content-Type");
|
|
const char *param;
|
|
size_t size;
|
|
|
|
if (!content_type) {
|
|
return NULL;
|
|
}
|
|
|
|
param = strchr(content_type, ';');
|
|
size = param ? param - content_type : strlen(content_type);
|
|
|
|
return ast_strndup(content_type, size);
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the value of the Content-Length header.
|
|
*
|
|
* \param headers HTTP headers.
|
|
*
|
|
* \retval length Value of the Content-Length header.
|
|
* \retval 0 if header is not present.
|
|
* \retval -1 if header is invalid.
|
|
*/
|
|
static int get_content_length(struct ast_variable *headers)
|
|
{
|
|
const char *content_length = get_header(headers, "Content-Length");
|
|
int length;
|
|
|
|
if (!content_length) {
|
|
/* Missing content length; assume zero */
|
|
return 0;
|
|
}
|
|
|
|
length = 0;
|
|
if (sscanf(content_length, "%30d", &length) != 1) {
|
|
/* Invalid Content-Length value */
|
|
length = -1;
|
|
}
|
|
return length;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the value of the Transfer-Encoding header.
|
|
*
|
|
* \param headers HTTP headers.
|
|
* \retval string Value of the Transfer-Encoding header.
|
|
* \retval NULL if header is not present.
|
|
*/
|
|
static const char *get_transfer_encoding(struct ast_variable *headers)
|
|
{
|
|
return get_header(headers, "Transfer-Encoding");
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Determine if the HTTP peer wants the connection closed.
|
|
*
|
|
* \param headers List of HTTP headers
|
|
*
|
|
* \retval 0 keep connection open.
|
|
* \retval -1 close connection.
|
|
*/
|
|
static int http_check_connection_close(struct ast_variable *headers)
|
|
{
|
|
const char *connection = get_header(headers, "Connection");
|
|
int close_connection = 0;
|
|
|
|
if (connection && !strcasecmp(connection, "close")) {
|
|
close_connection = -1;
|
|
}
|
|
return close_connection;
|
|
}
|
|
|
|
void ast_http_request_close_on_completion(struct ast_tcptls_session_instance *ser)
|
|
{
|
|
struct http_worker_private_data *request = ser->private_data;
|
|
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Initialize the request tracking information in case of early failure.
|
|
* \since 12.4.0
|
|
*
|
|
* \param request Request tracking information.
|
|
*
|
|
* \return Nothing
|
|
*/
|
|
static void http_request_tracking_init(struct http_worker_private_data *request)
|
|
{
|
|
ast_set_flags_to(&request->flags,
|
|
HTTP_FLAG_HAS_BODY | HTTP_FLAG_BODY_READ | HTTP_FLAG_CLOSE_ON_COMPLETION,
|
|
/* Assume close in case request fails early */
|
|
HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Setup the HTTP request tracking information.
|
|
* \since 12.4.0
|
|
*
|
|
* \param ser HTTP TCP/TLS session object.
|
|
* \param headers List of HTTP headers.
|
|
*
|
|
* \retval 0 on success.
|
|
* \retval -1 on error.
|
|
*/
|
|
static int http_request_tracking_setup(struct ast_tcptls_session_instance *ser, struct ast_variable *headers)
|
|
{
|
|
struct http_worker_private_data *request = ser->private_data;
|
|
const char *transfer_encoding;
|
|
|
|
ast_set_flags_to(&request->flags,
|
|
HTTP_FLAG_HAS_BODY | HTTP_FLAG_BODY_READ | HTTP_FLAG_CLOSE_ON_COMPLETION,
|
|
http_check_connection_close(headers) ? HTTP_FLAG_CLOSE_ON_COMPLETION : 0);
|
|
|
|
transfer_encoding = get_transfer_encoding(headers);
|
|
if (transfer_encoding && !strcasecmp(transfer_encoding, "chunked")) {
|
|
request->body_length = -1;
|
|
ast_set_flag(&request->flags, HTTP_FLAG_HAS_BODY);
|
|
return 0;
|
|
}
|
|
|
|
request->body_length = get_content_length(headers);
|
|
if (0 < request->body_length) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_HAS_BODY);
|
|
} else if (request->body_length < 0) {
|
|
/* Invalid Content-Length */
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
ast_http_error(ser, 400, "Bad Request", "Invalid Content-Length in request!");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void ast_http_body_read_status(struct ast_tcptls_session_instance *ser, int read_success)
|
|
{
|
|
struct http_worker_private_data *request;
|
|
|
|
request = ser->private_data;
|
|
if (!ast_test_flag(&request->flags, HTTP_FLAG_HAS_BODY)
|
|
|| ast_test_flag(&request->flags, HTTP_FLAG_BODY_READ)) {
|
|
/* No body to read. */
|
|
return;
|
|
}
|
|
ast_set_flag(&request->flags, HTTP_FLAG_BODY_READ);
|
|
if (!read_success) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Read the next length bytes from the HTTP body.
|
|
* \since 12.4.0
|
|
*
|
|
* \param ser HTTP TCP/TLS session object.
|
|
* \param buf Where to put the contents reading.
|
|
* \param length How much contents to read.
|
|
* \param what_getting Name of the contents reading.
|
|
*
|
|
* \retval 0 on success.
|
|
* \retval -1 on error.
|
|
*/
|
|
static int http_body_read_contents(struct ast_tcptls_session_instance *ser, char *buf, int length, const char *what_getting)
|
|
{
|
|
int res;
|
|
|
|
/* Stream is in exclusive mode so we get it all if possible. */
|
|
res = ast_iostream_read(ser->stream, buf, length);
|
|
if (res < length) {
|
|
ast_log(LOG_WARNING, "Short HTTP request %s (Wanted %d)\n",
|
|
what_getting, length);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Read and discard the next length bytes from the HTTP body.
|
|
* \since 12.4.0
|
|
*
|
|
* \param ser HTTP TCP/TLS session object.
|
|
* \param length How much contents to discard
|
|
* \param what_getting Name of the contents discarding.
|
|
*
|
|
* \retval 0 on success.
|
|
* \retval -1 on error.
|
|
*/
|
|
static int http_body_discard_contents(struct ast_tcptls_session_instance *ser, int length, const char *what_getting)
|
|
{
|
|
ssize_t res;
|
|
|
|
res = ast_iostream_discard(ser->stream, length);
|
|
if (res < length) {
|
|
ast_log(LOG_WARNING, "Short HTTP request %s (Wanted %d but got %zd)\n",
|
|
what_getting, length, res);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief decode chunked mode hexadecimal value
|
|
*
|
|
* \param s string to decode
|
|
* \param len length of string
|
|
*
|
|
* \retval length on success.
|
|
* \retval -1 on error.
|
|
*/
|
|
static int chunked_atoh(const char *s, int len)
|
|
{
|
|
int value = 0;
|
|
char c;
|
|
|
|
if (*s < '0') {
|
|
/* zero value must be 0\n not just \n */
|
|
return -1;
|
|
}
|
|
|
|
while (len--) {
|
|
c = *s++;
|
|
if (c == '\x0D') {
|
|
return value;
|
|
}
|
|
if (c == ';') {
|
|
/* We have a chunk-extension that we don't care about. */
|
|
while (len--) {
|
|
if (*s++ == '\x0D') {
|
|
return value;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
value <<= 4;
|
|
if (c >= '0' && c <= '9') {
|
|
value += c - '0';
|
|
continue;
|
|
}
|
|
if (c >= 'a' && c <= 'f') {
|
|
value += 10 + c - 'a';
|
|
continue;
|
|
}
|
|
if (c >= 'A' && c <= 'F') {
|
|
value += 10 + c - 'A';
|
|
continue;
|
|
}
|
|
/* invalid character */
|
|
return -1;
|
|
}
|
|
/* end of string */
|
|
return -1;
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Read and convert the chunked body header length.
|
|
* \since 12.4.0
|
|
*
|
|
* \param ser HTTP TCP/TLS session object.
|
|
*
|
|
* \retval length Size of chunk to expect.
|
|
* \retval -1 on error.
|
|
*/
|
|
static int http_body_get_chunk_length(struct ast_tcptls_session_instance *ser)
|
|
{
|
|
int length;
|
|
char header_line[MAX_HTTP_LINE_LENGTH];
|
|
|
|
/* get the line of hexadecimal giving chunk-size w/ optional chunk-extension */
|
|
if (ast_iostream_gets(ser->stream, header_line, sizeof(header_line)) <= 0) {
|
|
ast_log(LOG_WARNING, "Short HTTP read of chunked header\n");
|
|
return -1;
|
|
}
|
|
length = chunked_atoh(header_line, strlen(header_line));
|
|
if (length < 0) {
|
|
ast_log(LOG_WARNING, "Invalid HTTP chunk size\n");
|
|
return -1;
|
|
}
|
|
return length;
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Read and check the chunk contents line termination.
|
|
* \since 12.4.0
|
|
*
|
|
* \param ser HTTP TCP/TLS session object.
|
|
*
|
|
* \retval 0 on success.
|
|
* \retval -1 on error.
|
|
*/
|
|
static int http_body_check_chunk_sync(struct ast_tcptls_session_instance *ser)
|
|
{
|
|
int res;
|
|
char chunk_sync[2];
|
|
|
|
/* Stay in fread until get the expected CRLF or timeout. */
|
|
res = ast_iostream_read(ser->stream, chunk_sync, sizeof(chunk_sync));
|
|
if (res < sizeof(chunk_sync)) {
|
|
ast_log(LOG_WARNING, "Short HTTP chunk sync read (Wanted %zu)\n",
|
|
sizeof(chunk_sync));
|
|
return -1;
|
|
}
|
|
if (chunk_sync[0] != 0x0D || chunk_sync[1] != 0x0A) {
|
|
ast_log(LOG_WARNING, "HTTP chunk sync bytes wrong (0x%02hhX, 0x%02hhX)\n",
|
|
(unsigned char) chunk_sync[0], (unsigned char) chunk_sync[1]);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Read and discard any chunked trailer entity-header lines.
|
|
* \since 12.4.0
|
|
*
|
|
* \param ser HTTP TCP/TLS session object.
|
|
*
|
|
* \retval 0 on success.
|
|
* \retval -1 on error.
|
|
*/
|
|
static int http_body_discard_chunk_trailer_headers(struct ast_tcptls_session_instance *ser)
|
|
{
|
|
char header_line[MAX_HTTP_LINE_LENGTH];
|
|
|
|
for (;;) {
|
|
if (ast_iostream_gets(ser->stream, header_line, sizeof(header_line)) <= 0) {
|
|
ast_log(LOG_WARNING, "Short HTTP read of chunked trailer header\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Trim trailing whitespace */
|
|
ast_trim_blanks(header_line);
|
|
if (ast_strlen_zero(header_line)) {
|
|
/* A blank line ends the chunked-body */
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ast_http_body_discard(struct ast_tcptls_session_instance *ser)
|
|
{
|
|
struct http_worker_private_data *request;
|
|
|
|
request = ser->private_data;
|
|
if (!ast_test_flag(&request->flags, HTTP_FLAG_HAS_BODY)
|
|
|| ast_test_flag(&request->flags, HTTP_FLAG_BODY_READ)) {
|
|
/* No body to read or it has already been read. */
|
|
return 0;
|
|
}
|
|
ast_set_flag(&request->flags, HTTP_FLAG_BODY_READ);
|
|
|
|
ast_debug(1, "HTTP discarding unused request body\n");
|
|
|
|
ast_assert(request->body_length != 0);
|
|
if (0 < request->body_length) {
|
|
if (http_body_discard_contents(ser, request->body_length, "body")) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* parse chunked-body */
|
|
for (;;) {
|
|
int length;
|
|
|
|
length = http_body_get_chunk_length(ser);
|
|
if (length < 0) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
return -1;
|
|
}
|
|
if (length == 0) {
|
|
/* parsed last-chunk */
|
|
break;
|
|
}
|
|
|
|
if (http_body_discard_contents(ser, length, "chunk-data")
|
|
|| http_body_check_chunk_sync(ser)) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* Read and discard any trailer entity-header lines. */
|
|
if (http_body_discard_chunk_trailer_headers(ser)) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the contents (body) of the HTTP request
|
|
*
|
|
* \param return_length ptr to int that returns content length
|
|
* \param ser HTTP TCP/TLS session object
|
|
* \param headers List of HTTP headers
|
|
* \return ptr to content (zero terminated) or NULL on failure
|
|
* \note Since returned ptr is malloc'd, it should be free'd by caller
|
|
*/
|
|
static char *ast_http_get_contents(int *return_length,
|
|
struct ast_tcptls_session_instance *ser, struct ast_variable *headers)
|
|
{
|
|
struct http_worker_private_data *request;
|
|
int content_length;
|
|
int bufsize;
|
|
char *buf;
|
|
|
|
request = ser->private_data;
|
|
if (!ast_test_flag(&request->flags, HTTP_FLAG_HAS_BODY)) {
|
|
/* no content - not an error */
|
|
return NULL;
|
|
}
|
|
if (ast_test_flag(&request->flags, HTTP_FLAG_BODY_READ)) {
|
|
/* Already read the body. Cannot read again. Assume no content. */
|
|
ast_assert(0);
|
|
return NULL;
|
|
}
|
|
ast_set_flag(&request->flags, HTTP_FLAG_BODY_READ);
|
|
|
|
ast_debug(2, "HTTP consuming request body\n");
|
|
|
|
ast_assert(request->body_length != 0);
|
|
if (0 < request->body_length) {
|
|
/* handle regular non-chunked content */
|
|
content_length = request->body_length;
|
|
if (content_length > MAX_CONTENT_LENGTH) {
|
|
ast_log(LOG_WARNING, "Excessively long HTTP content. (%d > %d)\n",
|
|
content_length, MAX_CONTENT_LENGTH);
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
errno = EFBIG;
|
|
return NULL;
|
|
}
|
|
buf = ast_malloc(content_length + 1);
|
|
if (!buf) {
|
|
/* Malloc sets ENOMEM */
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
return NULL;
|
|
}
|
|
|
|
if (http_body_read_contents(ser, buf, content_length, "body")) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
errno = EIO;
|
|
ast_free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
buf[content_length] = 0;
|
|
*return_length = content_length;
|
|
return buf;
|
|
}
|
|
|
|
/* pre-allocate buffer */
|
|
bufsize = 250;
|
|
buf = ast_malloc(bufsize);
|
|
if (!buf) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
return NULL;
|
|
}
|
|
|
|
/* parse chunked-body */
|
|
content_length = 0;
|
|
for (;;) {
|
|
int chunk_length;
|
|
|
|
chunk_length = http_body_get_chunk_length(ser);
|
|
if (chunk_length < 0) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
errno = EIO;
|
|
ast_free(buf);
|
|
return NULL;
|
|
}
|
|
if (chunk_length == 0) {
|
|
/* parsed last-chunk */
|
|
break;
|
|
}
|
|
if (content_length + chunk_length > MAX_CONTENT_LENGTH) {
|
|
ast_log(LOG_WARNING,
|
|
"Excessively long HTTP accumulated chunked body. (%d + %d > %d)\n",
|
|
content_length, chunk_length, MAX_CONTENT_LENGTH);
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
errno = EFBIG;
|
|
ast_free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
/* insure buffer is large enough +1 */
|
|
if (content_length + chunk_length >= bufsize) {
|
|
char *new_buf;
|
|
|
|
/* Increase bufsize until it can handle the expected data. */
|
|
do {
|
|
bufsize *= 2;
|
|
} while (content_length + chunk_length >= bufsize);
|
|
|
|
new_buf = ast_realloc(buf, bufsize);
|
|
if (!new_buf) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
ast_free(buf);
|
|
return NULL;
|
|
}
|
|
buf = new_buf;
|
|
}
|
|
|
|
if (http_body_read_contents(ser, buf + content_length, chunk_length, "chunk-data")
|
|
|| http_body_check_chunk_sync(ser)) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
errno = EIO;
|
|
ast_free(buf);
|
|
return NULL;
|
|
}
|
|
content_length += chunk_length;
|
|
}
|
|
|
|
/*
|
|
* Read and discard any trailer entity-header lines
|
|
* which we don't care about.
|
|
*
|
|
* XXX In the future we may need to add the trailer headers
|
|
* to the passed in headers list rather than discarding them.
|
|
*/
|
|
if (http_body_discard_chunk_trailer_headers(ser)) {
|
|
ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
|
|
errno = EIO;
|
|
ast_free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
buf[content_length] = 0;
|
|
*return_length = content_length;
|
|
return buf;
|
|
}
|
|
|
|
struct ast_json *ast_http_get_json(
|
|
struct ast_tcptls_session_instance *ser, struct ast_variable *headers)
|
|
{
|
|
int content_length = 0;
|
|
struct ast_json *body;
|
|
RAII_VAR(char *, buf, NULL, ast_free);
|
|
RAII_VAR(char *, type, get_content_type(headers), ast_free);
|
|
|
|
/* Use errno to distinguish errors from no body */
|
|
errno = 0;
|
|
|
|
if (ast_strlen_zero(type) || strcasecmp(type, "application/json")) {
|
|
/* Content type is not JSON. Don't read the body. */
|
|
return NULL;
|
|
}
|
|
|
|
buf = ast_http_get_contents(&content_length, ser, headers);
|
|
if (!buf || !content_length) {
|
|
/*
|
|
* errno already set
|
|
* or it is not an error to have zero content
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
body = ast_json_load_buf(buf, content_length, NULL);
|
|
if (!body) {
|
|
/* Failed to parse JSON; treat as an I/O error */
|
|
errno = EIO;
|
|
return NULL;
|
|
}
|
|
|
|
return body;
|
|
}
|
|
|
|
/*
|
|
* get post variables from client Request Entity-Body, if content type is
|
|
* application/x-www-form-urlencoded
|
|
*/
|
|
struct ast_variable *ast_http_get_post_vars(
|
|
struct ast_tcptls_session_instance *ser, struct ast_variable *headers)
|
|
{
|
|
int content_length = 0;
|
|
struct ast_variable *v, *post_vars=NULL, *prev = NULL;
|
|
char *var, *val;
|
|
RAII_VAR(char *, buf, NULL, ast_free);
|
|
RAII_VAR(char *, type, get_content_type(headers), ast_free);
|
|
|
|
/* Use errno to distinguish errors from no params */
|
|
errno = 0;
|
|
|
|
if (ast_strlen_zero(type) ||
|
|
strcasecmp(type, "application/x-www-form-urlencoded")) {
|
|
/* Content type is not form data. Don't read the body. */
|
|
return NULL;
|
|
}
|
|
|
|
buf = ast_http_get_contents(&content_length, ser, headers);
|
|
if (!buf || !content_length) {
|
|
/*
|
|
* errno already set
|
|
* or it is not an error to have zero content
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
while ((val = strsep(&buf, "&"))) {
|
|
var = strsep(&val, "=");
|
|
if (val) {
|
|
ast_uri_decode(val, ast_uri_http_legacy);
|
|
} else {
|
|
val = "";
|
|
}
|
|
ast_uri_decode(var, ast_uri_http_legacy);
|
|
if ((v = ast_variable_new(var, val, ""))) {
|
|
if (post_vars) {
|
|
prev->next = v;
|
|
} else {
|
|
post_vars = v;
|
|
}
|
|
prev = v;
|
|
}
|
|
}
|
|
|
|
return post_vars;
|
|
}
|
|
|
|
static int handle_uri(struct ast_tcptls_session_instance *ser, char *uri,
|
|
enum ast_http_method method, struct ast_variable *headers)
|
|
{
|
|
char *c;
|
|
int res = 0;
|
|
char *params = uri;
|
|
struct ast_http_uri *urih = NULL;
|
|
int l;
|
|
struct ast_variable *get_vars = NULL, *v, *prev = NULL;
|
|
struct http_uri_redirect *redirect;
|
|
|
|
ast_debug(2, "HTTP Request URI is %s \n", uri);
|
|
|
|
strsep(¶ms, "?");
|
|
/* Extract arguments from the request and store them in variables. */
|
|
if (params) {
|
|
char *var, *val;
|
|
|
|
while ((val = strsep(¶ms, "&"))) {
|
|
var = strsep(&val, "=");
|
|
if (val) {
|
|
ast_uri_decode(val, ast_uri_http_legacy);
|
|
} else {
|
|
val = "";
|
|
}
|
|
ast_uri_decode(var, ast_uri_http_legacy);
|
|
if ((v = ast_variable_new(var, val, ""))) {
|
|
if (get_vars) {
|
|
prev->next = v;
|
|
} else {
|
|
get_vars = v;
|
|
}
|
|
prev = v;
|
|
}
|
|
}
|
|
}
|
|
|
|
AST_RWLIST_RDLOCK(&uri_redirects);
|
|
AST_RWLIST_TRAVERSE(&uri_redirects, redirect, entry) {
|
|
if (!strcasecmp(uri, redirect->target)) {
|
|
struct ast_str *http_header = ast_str_create(128);
|
|
|
|
if (!http_header) {
|
|
ast_http_request_close_on_completion(ser);
|
|
ast_http_error(ser, 500, "Server Error", "Out of memory");
|
|
break;
|
|
}
|
|
ast_str_set(&http_header, 0, "Location: %s\r\n", redirect->dest);
|
|
ast_http_send(ser, method, 302, "Moved Temporarily", http_header, NULL, 0, 0);
|
|
break;
|
|
}
|
|
}
|
|
AST_RWLIST_UNLOCK(&uri_redirects);
|
|
if (redirect) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/* We want requests to start with the (optional) prefix and '/' */
|
|
l = strlen(prefix);
|
|
if (!strncasecmp(uri, prefix, l) && uri[l] == '/') {
|
|
uri += l + 1;
|
|
/* scan registered uris to see if we match one. */
|
|
AST_RWLIST_RDLOCK(&uris);
|
|
AST_RWLIST_TRAVERSE(&uris, urih, entry) {
|
|
l = strlen(urih->uri);
|
|
c = uri + l; /* candidate */
|
|
ast_debug(2, "match request [%s] with handler [%s] len %d\n", uri, urih->uri, l);
|
|
if (strncasecmp(urih->uri, uri, l) /* no match */
|
|
|| (*c && *c != '/')) { /* substring */
|
|
continue;
|
|
}
|
|
if (*c == '/') {
|
|
c++;
|
|
}
|
|
if (!*c || urih->has_subtree) {
|
|
uri = c;
|
|
break;
|
|
}
|
|
}
|
|
AST_RWLIST_UNLOCK(&uris);
|
|
}
|
|
if (urih) {
|
|
ast_debug(1, "Match made with [%s]\n", urih->uri);
|
|
if (!urih->no_decode_uri) {
|
|
ast_uri_decode(uri, ast_uri_http_legacy);
|
|
}
|
|
res = urih->callback(ser, urih, uri, method, get_vars, headers);
|
|
} else {
|
|
ast_debug(1, "Requested URI [%s] has no handler\n", uri);
|
|
ast_http_error(ser, 404, "Not Found", "The requested URL was not found on this server.");
|
|
}
|
|
|
|
cleanup:
|
|
ast_variables_destroy(get_vars);
|
|
return res;
|
|
}
|
|
|
|
static struct ast_variable *parse_cookies(const char *cookies)
|
|
{
|
|
char *parse = ast_strdupa(cookies);
|
|
char *cur;
|
|
struct ast_variable *vars = NULL, *var;
|
|
|
|
while ((cur = strsep(&parse, ";"))) {
|
|
char *name, *val;
|
|
|
|
name = val = cur;
|
|
strsep(&val, "=");
|
|
|
|
if (ast_strlen_zero(name) || ast_strlen_zero(val)) {
|
|
continue;
|
|
}
|
|
|
|
name = ast_strip(name);
|
|
val = ast_strip_quoted(val, "\"", "\"");
|
|
|
|
if (ast_strlen_zero(name) || ast_strlen_zero(val)) {
|
|
continue;
|
|
}
|
|
|
|
ast_debug(1, "HTTP Cookie, Name: '%s' Value: '%s'\n", name, val);
|
|
|
|
var = ast_variable_new(name, val, __FILE__);
|
|
var->next = vars;
|
|
vars = var;
|
|
}
|
|
|
|
return vars;
|
|
}
|
|
|
|
/* get cookie from Request headers */
|
|
struct ast_variable *ast_http_get_cookies(struct ast_variable *headers)
|
|
{
|
|
struct ast_variable *v, *cookies = NULL;
|
|
|
|
for (v = headers; v; v = v->next) {
|
|
if (!strcasecmp(v->name, "Cookie")) {
|
|
ast_variables_destroy(cookies);
|
|
cookies = parse_cookies(v->value);
|
|
}
|
|
}
|
|
return cookies;
|
|
}
|
|
|
|
static struct ast_http_auth *auth_create(const char *userid, const char *password)
|
|
{
|
|
struct ast_http_auth *auth;
|
|
size_t userid_len;
|
|
size_t password_len;
|
|
|
|
if (!userid || !password) {
|
|
ast_log(LOG_ERROR, "Invalid userid/password\n");
|
|
return NULL;
|
|
}
|
|
|
|
userid_len = strlen(userid) + 1;
|
|
password_len = strlen(password) + 1;
|
|
|
|
/* Allocate enough room to store everything in one memory block */
|
|
auth = ao2_alloc(sizeof(*auth) + userid_len + password_len, NULL);
|
|
if (!auth) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Put the userid right after the struct */
|
|
auth->userid = (char *)(auth + 1);
|
|
strcpy(auth->userid, userid);
|
|
|
|
/* Put the password right after the userid */
|
|
auth->password = auth->userid + userid_len;
|
|
strcpy(auth->password, password);
|
|
|
|
return auth;
|
|
}
|
|
|
|
#define BASIC_PREFIX "Basic "
|
|
#define BASIC_LEN 6 /*!< strlen(BASIC_PREFIX) */
|
|
|
|
struct ast_http_auth *ast_http_get_auth(struct ast_variable *headers)
|
|
{
|
|
struct ast_variable *v;
|
|
|
|
for (v = headers; v; v = v->next) {
|
|
const char *base64;
|
|
char decoded[256] = {};
|
|
char *username;
|
|
char *password;
|
|
#ifdef AST_DEVMODE
|
|
int cnt;
|
|
#endif /* AST_DEVMODE */
|
|
|
|
if (strcasecmp("Authorization", v->name) != 0) {
|
|
continue;
|
|
}
|
|
|
|
if (!ast_begins_with(v->value, BASIC_PREFIX)) {
|
|
ast_log(LOG_DEBUG,
|
|
"Unsupported Authorization scheme\n");
|
|
continue;
|
|
}
|
|
|
|
/* Basic auth header parsing. RFC 2617, section 2.
|
|
* credentials = "Basic" basic-credentials
|
|
* basic-credentials = base64-user-pass
|
|
* base64-user-pass = <base64 encoding of user-pass,
|
|
* except not limited to 76 char/line>
|
|
* user-pass = userid ":" password
|
|
*/
|
|
|
|
base64 = v->value + BASIC_LEN;
|
|
|
|
/* This will truncate "userid:password" lines to
|
|
* sizeof(decoded). The array is long enough that this shouldn't
|
|
* be a problem */
|
|
#ifdef AST_DEVMODE
|
|
cnt =
|
|
#endif /* AST_DEVMODE */
|
|
ast_base64decode((unsigned char*)decoded, base64,
|
|
sizeof(decoded) - 1);
|
|
ast_assert(cnt < sizeof(decoded));
|
|
|
|
/* Split the string at the colon */
|
|
password = decoded;
|
|
username = strsep(&password, ":");
|
|
if (!password) {
|
|
ast_log(LOG_WARNING, "Invalid Authorization header\n");
|
|
return NULL;
|
|
}
|
|
|
|
return auth_create(username, password);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int ast_http_response_status_line(const char *buf, const char *version, int code)
|
|
{
|
|
int status_code;
|
|
size_t size = strlen(version);
|
|
|
|
if (strncmp(buf, version, size) || buf[size] != ' ') {
|
|
ast_log(LOG_ERROR, "HTTP version not supported - "
|
|
"expected %s\n", version);
|
|
return -1;
|
|
}
|
|
|
|
/* skip to status code (version + space) */
|
|
buf += size + 1;
|
|
|
|
if (sscanf(buf, "%d", &status_code) != 1) {
|
|
ast_log(LOG_ERROR, "Could not read HTTP status code - "
|
|
"%s\n", buf);
|
|
return -1;
|
|
}
|
|
|
|
return status_code;
|
|
}
|
|
|
|
static void remove_excess_lws(char *s)
|
|
{
|
|
char *p, *res = s;
|
|
char *buf = ast_malloc(strlen(s) + 1);
|
|
char *buf_end;
|
|
|
|
if (!buf) {
|
|
return;
|
|
}
|
|
|
|
buf_end = buf;
|
|
|
|
while (*s && *(s = ast_skip_blanks(s))) {
|
|
p = s;
|
|
s = ast_skip_nonblanks(s);
|
|
|
|
if (buf_end != buf) {
|
|
*buf_end++ = ' ';
|
|
}
|
|
|
|
memcpy(buf_end, p, s - p);
|
|
buf_end += s - p;
|
|
}
|
|
*buf_end = '\0';
|
|
/* safe since buf will always be less than or equal to res */
|
|
strcpy(res, buf);
|
|
ast_free(buf);
|
|
}
|
|
|
|
int ast_http_header_parse(char *buf, char **name, char **value)
|
|
{
|
|
ast_trim_blanks(buf);
|
|
if (ast_strlen_zero(buf)) {
|
|
return -1;
|
|
}
|
|
|
|
*value = buf;
|
|
*name = strsep(value, ":");
|
|
if (!*value) {
|
|
return 1;
|
|
}
|
|
|
|
*value = ast_skip_blanks(*value);
|
|
if (ast_strlen_zero(*value) || ast_strlen_zero(*name)) {
|
|
return 1;
|
|
}
|
|
|
|
remove_excess_lws(*value);
|
|
return 0;
|
|
}
|
|
|
|
int ast_http_header_match(const char *name, const char *expected_name,
|
|
const char *value, const char *expected_value)
|
|
{
|
|
if (strcasecmp(name, expected_name)) {
|
|
/* no value to validate if names don't match */
|
|
return 0;
|
|
}
|
|
|
|
if (strcasecmp(value, expected_value)) {
|
|
ast_log(LOG_ERROR, "Invalid header value - expected %s "
|
|
"received %s", value, expected_value);
|
|
return -1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int ast_http_header_match_in(const char *name, const char *expected_name,
|
|
const char *value, const char *expected_value)
|
|
{
|
|
if (strcasecmp(name, expected_name)) {
|
|
/* no value to validate if names don't match */
|
|
return 0;
|
|
}
|
|
|
|
if (!strcasestr(expected_value, value)) {
|
|
ast_log(LOG_ERROR, "Header '%s' - could not locate '%s' "
|
|
"in '%s'\n", name, value, expected_value);
|
|
return -1;
|
|
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*! Limit the number of request headers in case the sender is being ridiculous. */
|
|
#define MAX_HTTP_REQUEST_HEADERS 100
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Read the request headers.
|
|
* \since 12.4.0
|
|
*
|
|
* \param ser HTTP TCP/TLS session object.
|
|
* \param headers Where to put the request headers list pointer.
|
|
*
|
|
* \retval 0 on success.
|
|
* \retval -1 on error.
|
|
*/
|
|
static int http_request_headers_get(struct ast_tcptls_session_instance *ser, struct ast_variable **headers)
|
|
{
|
|
struct ast_variable *tail = *headers;
|
|
int remaining_headers;
|
|
char header_line[MAX_HTTP_LINE_LENGTH];
|
|
|
|
remaining_headers = MAX_HTTP_REQUEST_HEADERS;
|
|
for (;;) {
|
|
char *name;
|
|
char *value;
|
|
|
|
if (ast_iostream_gets(ser->stream, header_line, sizeof(header_line)) <= 0) {
|
|
ast_http_error(ser, 400, "Bad Request", "Timeout");
|
|
return -1;
|
|
}
|
|
|
|
/* Trim trailing characters */
|
|
ast_trim_blanks(header_line);
|
|
if (ast_strlen_zero(header_line)) {
|
|
/* A blank line ends the request header section. */
|
|
break;
|
|
}
|
|
|
|
value = header_line;
|
|
name = strsep(&value, ":");
|
|
if (!value) {
|
|
continue;
|
|
}
|
|
|
|
value = ast_skip_blanks(value);
|
|
if (ast_strlen_zero(value) || ast_strlen_zero(name)) {
|
|
continue;
|
|
}
|
|
|
|
ast_trim_blanks(name);
|
|
|
|
if (!remaining_headers--) {
|
|
/* Too many headers. */
|
|
ast_http_error(ser, 413, "Request Entity Too Large", "Too many headers");
|
|
return -1;
|
|
}
|
|
if (!*headers) {
|
|
*headers = ast_variable_new(name, value, __FILE__);
|
|
tail = *headers;
|
|
} else {
|
|
tail->next = ast_variable_new(name, value, __FILE__);
|
|
tail = tail->next;
|
|
}
|
|
if (!tail) {
|
|
/*
|
|
* Variable allocation failure.
|
|
* Try to make some room.
|
|
*/
|
|
ast_variables_destroy(*headers);
|
|
*headers = NULL;
|
|
|
|
ast_http_error(ser, 500, "Server Error", "Out of memory");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Process a HTTP request.
|
|
* \since 12.4.0
|
|
*
|
|
* \param ser HTTP TCP/TLS session object.
|
|
*
|
|
* \retval 0 Continue and process the next HTTP request.
|
|
* \retval -1 Fatal HTTP connection error. Force the HTTP connection closed.
|
|
*/
|
|
static int httpd_process_request(struct ast_tcptls_session_instance *ser)
|
|
{
|
|
RAII_VAR(struct ast_variable *, headers, NULL, ast_variables_destroy);
|
|
char *uri;
|
|
char *method;
|
|
const char *transfer_encoding;
|
|
struct http_worker_private_data *request;
|
|
enum ast_http_method http_method = AST_HTTP_UNKNOWN;
|
|
int res;
|
|
char request_line[MAX_HTTP_LINE_LENGTH];
|
|
|
|
if (ast_iostream_gets(ser->stream, request_line, sizeof(request_line)) <= 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* Re-initialize the request body tracking data. */
|
|
request = ser->private_data;
|
|
http_request_tracking_init(request);
|
|
|
|
/* Get method */
|
|
method = ast_skip_blanks(request_line);
|
|
uri = ast_skip_nonblanks(method);
|
|
if (*uri) {
|
|
*uri++ = '\0';
|
|
}
|
|
|
|
if (!strcasecmp(method,"GET")) {
|
|
http_method = AST_HTTP_GET;
|
|
} else if (!strcasecmp(method,"POST")) {
|
|
http_method = AST_HTTP_POST;
|
|
} else if (!strcasecmp(method,"HEAD")) {
|
|
http_method = AST_HTTP_HEAD;
|
|
} else if (!strcasecmp(method,"PUT")) {
|
|
http_method = AST_HTTP_PUT;
|
|
} else if (!strcasecmp(method,"DELETE")) {
|
|
http_method = AST_HTTP_DELETE;
|
|
} else if (!strcasecmp(method,"OPTIONS")) {
|
|
http_method = AST_HTTP_OPTIONS;
|
|
}
|
|
|
|
uri = ast_skip_blanks(uri); /* Skip white space */
|
|
if (*uri) { /* terminate at the first blank */
|
|
char *c = ast_skip_nonblanks(uri);
|
|
|
|
if (*c) {
|
|
*c = '\0';
|
|
}
|
|
} else {
|
|
ast_http_error(ser, 400, "Bad Request", "Invalid Request");
|
|
return -1;
|
|
}
|
|
|
|
if (ast_shutdown_final()) {
|
|
ast_http_error(ser, 503, "Service Unavailable", "Shutdown in progress");
|
|
return -1;
|
|
}
|
|
|
|
/* process "Request Headers" lines */
|
|
if (http_request_headers_get(ser, &headers)) {
|
|
return -1;
|
|
}
|
|
|
|
transfer_encoding = get_transfer_encoding(headers);
|
|
/* Transfer encoding defaults to identity */
|
|
if (!transfer_encoding) {
|
|
transfer_encoding = "identity";
|
|
}
|
|
|
|
/*
|
|
* RFC 2616, section 3.6, we should respond with a 501 for any transfer-
|
|
* codings we don't understand.
|
|
*/
|
|
if (strcasecmp(transfer_encoding, "identity") != 0 &&
|
|
strcasecmp(transfer_encoding, "chunked") != 0) {
|
|
/* Transfer encodings not supported */
|
|
ast_http_error(ser, 501, "Unimplemented", "Unsupported Transfer-Encoding.");
|
|
return -1;
|
|
}
|
|
|
|
if (http_request_tracking_setup(ser, headers)
|
|
|| handle_uri(ser, uri, http_method, headers)
|
|
|| ast_test_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION)) {
|
|
res = -1;
|
|
} else {
|
|
res = 0;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static void *httpd_helper_thread(void *data)
|
|
{
|
|
struct ast_tcptls_session_instance *ser = data;
|
|
int timeout;
|
|
int arg = 1;
|
|
|
|
if (!ser) {
|
|
ao2_cleanup(ser);
|
|
return NULL;
|
|
}
|
|
|
|
if (ast_atomic_fetchadd_int(&session_count, +1) >= session_limit) {
|
|
ast_log(LOG_WARNING, "HTTP session count exceeded %d sessions.\n",
|
|
session_limit);
|
|
goto done;
|
|
}
|
|
ast_debug(1, "HTTP opening session. Top level\n");
|
|
|
|
/*
|
|
* Here we set TCP_NODELAY on the socket to disable Nagle's algorithm.
|
|
* This is necessary to prevent delays (caused by buffering) as we
|
|
* write to the socket in bits and pieces.
|
|
*/
|
|
if (setsockopt(ast_iostream_get_fd(ser->stream), IPPROTO_TCP, TCP_NODELAY, (char *) &arg, sizeof(arg)) < 0) {
|
|
ast_log(LOG_WARNING, "Failed to set TCP_NODELAY on HTTP connection: %s\n", strerror(errno));
|
|
}
|
|
ast_iostream_nonblock(ser->stream);
|
|
|
|
/* Setup HTTP worker private data to keep track of request body reading. */
|
|
ao2_cleanup(ser->private_data);
|
|
ser->private_data = ao2_alloc_options(sizeof(struct http_worker_private_data), NULL,
|
|
AO2_ALLOC_OPT_LOCK_NOLOCK);
|
|
if (!ser->private_data) {
|
|
ast_http_error(ser, 500, "Server Error", "Out of memory");
|
|
goto done;
|
|
}
|
|
http_request_tracking_init(ser->private_data);
|
|
|
|
/* Determine initial HTTP request wait timeout. */
|
|
timeout = session_keep_alive;
|
|
if (timeout <= 0) {
|
|
/* Persistent connections not enabled. */
|
|
timeout = session_inactivity;
|
|
}
|
|
if (timeout < MIN_INITIAL_REQUEST_TIMEOUT) {
|
|
timeout = MIN_INITIAL_REQUEST_TIMEOUT;
|
|
}
|
|
|
|
/* We can let the stream wait for data to arrive. */
|
|
ast_iostream_set_exclusive_input(ser->stream, 1);
|
|
|
|
for (;;) {
|
|
/* Wait for next potential HTTP request message. */
|
|
ast_iostream_set_timeout_idle_inactivity(ser->stream, timeout, session_inactivity);
|
|
if (httpd_process_request(ser)) {
|
|
/* Break the connection or the connection closed */
|
|
break;
|
|
}
|
|
if (!ser->stream) {
|
|
/* Web-socket or similar that took the connection */
|
|
break;
|
|
}
|
|
|
|
timeout = session_keep_alive;
|
|
if (timeout <= 0) {
|
|
/* Persistent connections not enabled. */
|
|
break;
|
|
}
|
|
}
|
|
|
|
done:
|
|
ast_atomic_fetchadd_int(&session_count, -1);
|
|
|
|
ast_debug(1, "HTTP closing session. Top level\n");
|
|
ast_tcptls_close_session_file(ser);
|
|
|
|
ao2_ref(ser, -1);
|
|
return NULL;
|
|
}
|
|
|
|
/*!
|
|
* \brief Add a new URI redirect
|
|
* The entries in the redirect list are sorted by length, just like the list
|
|
* of URI handlers.
|
|
*/
|
|
static void add_redirect(const char *value)
|
|
{
|
|
char *target, *dest;
|
|
struct http_uri_redirect *redirect, *cur;
|
|
unsigned int target_len;
|
|
unsigned int total_len;
|
|
|
|
dest = ast_strdupa(value);
|
|
dest = ast_skip_blanks(dest);
|
|
target = strsep(&dest, " ");
|
|
target = ast_skip_blanks(target);
|
|
target = strsep(&target, " "); /* trim trailing whitespace */
|
|
|
|
if (!dest) {
|
|
ast_log(LOG_WARNING, "Invalid redirect '%s'\n", value);
|
|
return;
|
|
}
|
|
|
|
target_len = strlen(target) + 1;
|
|
total_len = sizeof(*redirect) + target_len + strlen(dest) + 1;
|
|
|
|
if (!(redirect = ast_calloc(1, total_len))) {
|
|
return;
|
|
}
|
|
redirect->dest = redirect->target + target_len;
|
|
strcpy(redirect->target, target);
|
|
strcpy(redirect->dest, dest);
|
|
|
|
AST_RWLIST_WRLOCK(&uri_redirects);
|
|
|
|
target_len--; /* So we can compare directly with strlen() */
|
|
if (AST_RWLIST_EMPTY(&uri_redirects)
|
|
|| strlen(AST_RWLIST_FIRST(&uri_redirects)->target) <= target_len ) {
|
|
AST_RWLIST_INSERT_HEAD(&uri_redirects, redirect, entry);
|
|
AST_RWLIST_UNLOCK(&uri_redirects);
|
|
|
|
return;
|
|
}
|
|
|
|
AST_RWLIST_TRAVERSE(&uri_redirects, cur, entry) {
|
|
if (AST_RWLIST_NEXT(cur, entry)
|
|
&& strlen(AST_RWLIST_NEXT(cur, entry)->target) <= target_len ) {
|
|
AST_RWLIST_INSERT_AFTER(&uri_redirects, cur, redirect, entry);
|
|
AST_RWLIST_UNLOCK(&uri_redirects);
|
|
return;
|
|
}
|
|
}
|
|
|
|
AST_RWLIST_INSERT_TAIL(&uri_redirects, redirect, entry);
|
|
|
|
AST_RWLIST_UNLOCK(&uri_redirects);
|
|
}
|
|
|
|
static int __ast_http_load(int reload)
|
|
{
|
|
struct ast_config *cfg;
|
|
struct ast_variable *v;
|
|
int enabled=0;
|
|
int newenablestatic=0;
|
|
char newprefix[MAX_PREFIX] = "";
|
|
char server_name[MAX_SERVER_NAME_LENGTH];
|
|
struct http_uri_redirect *redirect;
|
|
struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
|
|
uint32_t bindport = DEFAULT_PORT;
|
|
RAII_VAR(struct ast_sockaddr *, addrs, NULL, ast_free);
|
|
int num_addrs = 0;
|
|
int http_tls_was_enabled = 0;
|
|
|
|
cfg = ast_config_load2("http.conf", "http", config_flags);
|
|
if (!cfg || cfg == CONFIG_STATUS_FILEUNCHANGED || cfg == CONFIG_STATUS_FILEINVALID) {
|
|
return 0;
|
|
}
|
|
|
|
http_tls_was_enabled = (reload && http_tls_cfg.enabled);
|
|
|
|
http_tls_cfg.enabled = 0;
|
|
|
|
ast_free(http_tls_cfg.certfile);
|
|
http_tls_cfg.certfile = ast_strdup(AST_CERTFILE);
|
|
|
|
ast_free(http_tls_cfg.capath);
|
|
http_tls_cfg.capath = ast_strdup("");
|
|
|
|
ast_free(http_tls_cfg.pvtfile);
|
|
http_tls_cfg.pvtfile = ast_strdup("");
|
|
|
|
/* Apply modern intermediate settings according to the Mozilla OpSec team as of July 30th, 2015 but disable TLSv1 */
|
|
ast_set_flag(&http_tls_cfg.flags, AST_SSL_DISABLE_TLSV1 | AST_SSL_SERVER_CIPHER_ORDER);
|
|
|
|
ast_free(http_tls_cfg.cipher);
|
|
http_tls_cfg.cipher = ast_strdup("ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA");
|
|
|
|
AST_RWLIST_WRLOCK(&uri_redirects);
|
|
while ((redirect = AST_RWLIST_REMOVE_HEAD(&uri_redirects, entry))) {
|
|
ast_free(redirect);
|
|
}
|
|
AST_RWLIST_UNLOCK(&uri_redirects);
|
|
|
|
ast_sockaddr_setnull(&https_desc.local_address);
|
|
|
|
session_limit = DEFAULT_SESSION_LIMIT;
|
|
session_inactivity = DEFAULT_SESSION_INACTIVITY;
|
|
session_keep_alive = DEFAULT_SESSION_KEEP_ALIVE;
|
|
|
|
snprintf(server_name, sizeof(server_name), "Asterisk/%s", ast_get_version());
|
|
|
|
v = ast_variable_browse(cfg, "general");
|
|
for (; v; v = v->next) {
|
|
/* read tls config options while preventing unsupported options from being set */
|
|
if (strcasecmp(v->name, "tlscafile")
|
|
&& strcasecmp(v->name, "tlscapath")
|
|
&& strcasecmp(v->name, "tlscadir")
|
|
&& strcasecmp(v->name, "tlsverifyclient")
|
|
&& strcasecmp(v->name, "tlsdontverifyserver")
|
|
&& strcasecmp(v->name, "tlsclientmethod")
|
|
&& strcasecmp(v->name, "sslclientmethod")
|
|
&& !ast_tls_read_conf(&http_tls_cfg, &https_desc, v->name, v->value)) {
|
|
continue;
|
|
}
|
|
|
|
if (!strcasecmp(v->name, "servername")) {
|
|
if (!ast_strlen_zero(v->value)) {
|
|
ast_copy_string(server_name, v->value, sizeof(server_name));
|
|
} else {
|
|
server_name[0] = '\0';
|
|
}
|
|
} else if (!strcasecmp(v->name, "enabled")) {
|
|
enabled = ast_true(v->value);
|
|
} else if (!strcasecmp(v->name, "enablestatic")) {
|
|
newenablestatic = ast_true(v->value);
|
|
} else if (!strcasecmp(v->name, "bindport")) {
|
|
if (ast_parse_arg(v->value, PARSE_UINT32 | PARSE_IN_RANGE | PARSE_DEFAULT,
|
|
&bindport, DEFAULT_PORT, 0, 65535)) {
|
|
ast_log(LOG_WARNING, "Invalid port %s specified. Using default port %" PRId32 "\n",
|
|
v->value, DEFAULT_PORT);
|
|
}
|
|
} else if (!strcasecmp(v->name, "bindaddr")) {
|
|
if (!(num_addrs = ast_sockaddr_resolve(&addrs, v->value, 0, AST_AF_UNSPEC))) {
|
|
ast_log(LOG_WARNING, "Invalid bind address %s\n", v->value);
|
|
}
|
|
} else if (!strcasecmp(v->name, "prefix")) {
|
|
if (!ast_strlen_zero(v->value)) {
|
|
newprefix[0] = '/';
|
|
ast_copy_string(newprefix + 1, v->value, sizeof(newprefix) - 1);
|
|
} else {
|
|
newprefix[0] = '\0';
|
|
}
|
|
} else if (!strcasecmp(v->name, "redirect")) {
|
|
add_redirect(v->value);
|
|
} else if (!strcasecmp(v->name, "sessionlimit")) {
|
|
if (ast_parse_arg(v->value, PARSE_INT32 | PARSE_DEFAULT | PARSE_IN_RANGE,
|
|
&session_limit, DEFAULT_SESSION_LIMIT, 1, INT_MAX)) {
|
|
ast_log(LOG_WARNING, "Invalid %s '%s' at line %d of http.conf\n",
|
|
v->name, v->value, v->lineno);
|
|
}
|
|
} else if (!strcasecmp(v->name, "session_inactivity")) {
|
|
if (ast_parse_arg(v->value, PARSE_INT32 | PARSE_DEFAULT | PARSE_IN_RANGE,
|
|
&session_inactivity, DEFAULT_SESSION_INACTIVITY, 1, INT_MAX)) {
|
|
ast_log(LOG_WARNING, "Invalid %s '%s' at line %d of http.conf\n",
|
|
v->name, v->value, v->lineno);
|
|
}
|
|
} else if (!strcasecmp(v->name, "session_keep_alive")) {
|
|
if (sscanf(v->value, "%30d", &session_keep_alive) != 1
|
|
|| session_keep_alive < 0) {
|
|
session_keep_alive = DEFAULT_SESSION_KEEP_ALIVE;
|
|
ast_log(LOG_WARNING, "Invalid %s '%s' at line %d of http.conf\n",
|
|
v->name, v->value, v->lineno);
|
|
}
|
|
} else {
|
|
ast_log(LOG_WARNING, "Ignoring unknown option '%s' in http.conf\n", v->name);
|
|
}
|
|
}
|
|
|
|
ast_config_destroy(cfg);
|
|
|
|
if (strcmp(prefix, newprefix)) {
|
|
ast_copy_string(prefix, newprefix, sizeof(prefix));
|
|
}
|
|
|
|
ast_copy_string(http_server_name, server_name, sizeof(http_server_name));
|
|
enablestatic = newenablestatic;
|
|
|
|
if (num_addrs && enabled) {
|
|
int i;
|
|
for (i = 0; i < num_addrs; ++i) {
|
|
ast_sockaddr_copy(&http_desc.local_address, &addrs[i]);
|
|
if (!ast_sockaddr_port(&http_desc.local_address)) {
|
|
ast_sockaddr_set_port(&http_desc.local_address, bindport);
|
|
}
|
|
ast_tcptls_server_start(&http_desc);
|
|
if (http_desc.accept_fd == -1) {
|
|
ast_log(LOG_WARNING, "Failed to start HTTP server for address %s\n", ast_sockaddr_stringify(&addrs[i]));
|
|
ast_sockaddr_setnull(&http_desc.local_address);
|
|
} else {
|
|
ast_verb(1, "Bound HTTP server to address %s\n", ast_sockaddr_stringify(&addrs[i]));
|
|
break;
|
|
}
|
|
}
|
|
/* When no specific TLS bindaddr is specified, we just use
|
|
* the non-TLS bindaddress here.
|
|
*/
|
|
if (ast_sockaddr_isnull(&https_desc.local_address) && http_desc.accept_fd != -1) {
|
|
ast_sockaddr_copy(&https_desc.local_address, &http_desc.local_address);
|
|
/* Of course, we can't use the same port though.
|
|
* Since no bind address was specified, we just use the
|
|
* default TLS port
|
|
*/
|
|
ast_sockaddr_set_port(&https_desc.local_address, DEFAULT_TLS_PORT);
|
|
}
|
|
}
|
|
if (http_tls_was_enabled && !http_tls_cfg.enabled) {
|
|
ast_tcptls_server_stop(&https_desc);
|
|
} else if (http_tls_cfg.enabled && !ast_sockaddr_isnull(&https_desc.local_address)) {
|
|
/* We can get here either because a TLS-specific address was specified
|
|
* or because we copied the non-TLS address here. In the case where
|
|
* we read an explicit address from the config, there may have been
|
|
* no port specified, so we'll just use the default TLS port.
|
|
*/
|
|
if (!ast_sockaddr_port(&https_desc.local_address)) {
|
|
ast_sockaddr_set_port(&https_desc.local_address, DEFAULT_TLS_PORT);
|
|
}
|
|
if (ast_ssl_setup(https_desc.tls_cfg)) {
|
|
ast_tcptls_server_start(&https_desc);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static char *handle_show_http(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
|
|
{
|
|
struct ast_http_uri *urih;
|
|
struct http_uri_redirect *redirect;
|
|
|
|
switch (cmd) {
|
|
case CLI_INIT:
|
|
e->command = "http show status";
|
|
e->usage =
|
|
"Usage: http show status\n"
|
|
" Lists status of internal HTTP engine\n";
|
|
return NULL;
|
|
case CLI_GENERATE:
|
|
return NULL;
|
|
}
|
|
|
|
if (a->argc != 3) {
|
|
return CLI_SHOWUSAGE;
|
|
}
|
|
ast_cli(a->fd, "HTTP Server Status:\n");
|
|
ast_cli(a->fd, "Prefix: %s\n", prefix);
|
|
ast_cli(a->fd, "Server: %s\n", http_server_name);
|
|
if (ast_sockaddr_isnull(&http_desc.old_address)) {
|
|
ast_cli(a->fd, "Server Disabled\n\n");
|
|
} else {
|
|
ast_cli(a->fd, "Server Enabled and Bound to %s\n\n",
|
|
ast_sockaddr_stringify(&http_desc.old_address));
|
|
if (http_tls_cfg.enabled) {
|
|
ast_cli(a->fd, "HTTPS Server Enabled and Bound to %s\n\n",
|
|
ast_sockaddr_stringify(&https_desc.old_address));
|
|
}
|
|
}
|
|
|
|
ast_cli(a->fd, "Enabled URI's:\n");
|
|
AST_RWLIST_RDLOCK(&uris);
|
|
if (AST_RWLIST_EMPTY(&uris)) {
|
|
ast_cli(a->fd, "None.\n");
|
|
} else {
|
|
AST_RWLIST_TRAVERSE(&uris, urih, entry)
|
|
ast_cli(a->fd, "%s/%s%s => %s\n", prefix, urih->uri, (urih->has_subtree ? "/..." : "" ), urih->description);
|
|
}
|
|
AST_RWLIST_UNLOCK(&uris);
|
|
|
|
ast_cli(a->fd, "\nEnabled Redirects:\n");
|
|
AST_RWLIST_RDLOCK(&uri_redirects);
|
|
AST_RWLIST_TRAVERSE(&uri_redirects, redirect, entry)
|
|
ast_cli(a->fd, " %s => %s\n", redirect->target, redirect->dest);
|
|
if (AST_RWLIST_EMPTY(&uri_redirects)) {
|
|
ast_cli(a->fd, " None.\n");
|
|
}
|
|
AST_RWLIST_UNLOCK(&uri_redirects);
|
|
|
|
return CLI_SUCCESS;
|
|
}
|
|
|
|
int ast_http_reload(void)
|
|
{
|
|
return __ast_http_load(1);
|
|
}
|
|
|
|
static struct ast_cli_entry cli_http[] = {
|
|
AST_CLI_DEFINE(handle_show_http, "Display HTTP server status"),
|
|
};
|
|
|
|
static void http_shutdown(void)
|
|
{
|
|
struct http_uri_redirect *redirect;
|
|
ast_cli_unregister_multiple(cli_http, ARRAY_LEN(cli_http));
|
|
|
|
ast_tcptls_server_stop(&http_desc);
|
|
if (http_tls_cfg.enabled) {
|
|
ast_tcptls_server_stop(&https_desc);
|
|
}
|
|
ast_free(http_tls_cfg.certfile);
|
|
ast_free(http_tls_cfg.capath);
|
|
ast_free(http_tls_cfg.pvtfile);
|
|
ast_free(http_tls_cfg.cipher);
|
|
|
|
ast_http_uri_unlink(&statusuri);
|
|
ast_http_uri_unlink(&staticuri);
|
|
|
|
AST_RWLIST_WRLOCK(&uri_redirects);
|
|
while ((redirect = AST_RWLIST_REMOVE_HEAD(&uri_redirects, entry))) {
|
|
ast_free(redirect);
|
|
}
|
|
AST_RWLIST_UNLOCK(&uri_redirects);
|
|
}
|
|
|
|
int ast_http_init(void)
|
|
{
|
|
ast_http_uri_link(&statusuri);
|
|
ast_http_uri_link(&staticuri);
|
|
ast_cli_register_multiple(cli_http, ARRAY_LEN(cli_http));
|
|
ast_register_cleanup(http_shutdown);
|
|
|
|
return __ast_http_load(0);
|
|
}
|