*/
/*!
- * \file
+ * \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
- *
+ * 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"
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+ASTERISK_REGISTER_FILE()
#include <time.h>
#include <sys/time.h>
#include <sys/stat.h>
-#include <sys/signal.h>
+#include <signal.h>
#include <fcntl.h>
#include "asterisk/paths.h" /* use ast_config_AST_DATA_DIR */
-#include "asterisk/network.h"
#include "asterisk/cli.h"
#include "asterisk/tcptls.h"
#include "asterisk/http.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) */
-/* See http.h for more information about the SSL implementation */
-#if defined(HAVE_OPENSSL) && (defined(HAVE_FUNOPEN) || defined(HAVE_FOPENCOOKIE))
-#define DO_SSL /* comment in/out if you want to support ssl */
-#endif
+/*! 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;
/*!
* we have up to two accepting threads, one for http, one for https
*/
-static struct server_args http_desc = {
+static struct ast_tcptls_session_args http_desc = {
.accept_fd = -1,
.master = AST_PTHREADT_NULL,
.tls_cfg = NULL,
.worker_fn = httpd_helper_thread,
};
-static struct server_args https_desc = {
+static struct ast_tcptls_session_args https_desc = {
.accept_fd = -1,
.master = AST_PTHREADT_NULL,
.tls_cfg = &http_tls_cfg,
const char *mtype;
} mimetypes[] = {
{ "png", "image/png" },
+ { "xml", "text/xml" },
{ "jpg", "image/jpeg" },
{ "js", "application/x-javascript" },
{ "wav", "audio/x-wav" },
{ "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 {
static AST_RWLIST_HEAD_STATIC(uri_redirects, http_uri_redirect);
-static const char *ftype2mtype(const char *ftype, char *wkspace, int wkspacelen)
+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;
}
}
}
-
- snprintf(wkspace, wkspacelen, "text/%s", S_OR(ftype, "plain"));
-
- return wkspace;
+ return NULL;
}
-static uint32_t manid_from_vars(struct ast_variable *sid) {
- uint32_t mngid;
+uint32_t ast_http_manid_from_vars(struct ast_variable *headers)
+{
+ uint32_t mngid = 0;
+ struct ast_variable *v, *cookies;
- while (sid && strcmp(sid->name, "mansession_id"))
- sid = sid->next;
-
- if (!sid || sscanf(sid->value, "%x", &mngid) != 1)
- return 0;
-
+ 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;
}
}
}
-static struct ast_str *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 *vars, struct ast_variable *headers, int *status, char **title, int *contentlength)
+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;
- char *ftype;
+ const char *ftype;
const char *mtype;
char wkspace[80];
struct stat st;
int len;
int fd;
- struct timeval tv = ast_tvnow();
- char buf[256];
+ 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
+ /* 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 */
+ /* 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++;
}
- mtype = ftype2mtype(ftype, wkspace, sizeof(wkspace));
-
+ 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 = alloca(len);
+
+ 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 ((fd = open(path, O_RDONLY)) < 0) {
+ if (strstr(path, "/private/") && !astman_is_authed(ast_http_manid_from_vars(headers))) {
goto out403;
}
- if (strstr(path, "/private/") && !astman_is_authed(manid_from_vars(vars))) {
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
goto out403;
}
- ast_strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S %Z", ast_localtime(&tv, &tm, "GMT"));
- fprintf(ser->f, "HTTP/1.1 200 OK\r\n"
- "Server: Asterisk/%s\r\n"
- "Date: %s\r\n"
- "Connection: close\r\n"
- "Cache-Control: no-cache, no-store\r\n"
- "Content-Length: %d\r\n"
- "Content-type: %s\r\n\r\n",
- ast_get_version(), buf, (int) st.st_size, mtype);
+ /* 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"));
- while ((len = read(fd, buf, sizeof(buf))) > 0) {
- fwrite(buf, 1, len, ser->f);
+ /* 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;
+ }
}
- close(fd);
+ 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;
+ }
- return NULL;
+ 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:
- return ast_http_error((*status = 404),
- (*title = ast_strdup("Not Found")),
- NULL, "Nothing to see here. Move along.");
+ ast_http_error(ser, 404, "Not Found", "The requested URL was not found on this server.");
+ return 0;
out403:
- return ast_http_error((*status = 403),
- (*title = ast_strdup("Access Denied")),
- NULL, "Sorry, I cannot let you do that, Dave.");
+ 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 struct ast_str *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 *vars, struct ast_variable *headers, int *status, char **title, int *contentlength)
+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 = ast_str_create(512);
- struct ast_variable *v;
+ 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;
+ }
- if (out == NULL) {
- return out;
+ 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,
- "\r\n"
- "<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");
+ "<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_inet_ntoa(http_desc.oldsin.sin_addr));
- ast_str_append(&out, 0, "<tr><td><i>Bind Port</i></td><td><b>%d</b></td></tr>\r\n",
- ntohs(http_desc.oldsin.sin_port));
-
+ 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>%d</b></td></tr>\r\n",
- ntohs(https_desc.oldsin.sin_port));
+ 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 = vars; v; v = v->next) {
- if (strncasecmp(v->name, "cookie_", 7)) {
- ast_str_append(&out, 0, "<tr><td><i>Submitted Variable '%s'</i></td><td>%s</td></tr>\r\n", v->name, v->value);
- }
+ 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");
- for (v = vars; v; v = v->next) {
- if (!strncasecmp(v->name, "cookie_", 7)) {
- ast_str_append(&out, 0, "<tr><td><i>Cookie '%s'</i></td><td>%s</td></tr>\r\n", v->name, v->value);
- }
+ 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>\r\n");
- return out;
+ 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",
- .supports_get = 1,
+ .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,
- .static_content = 1,
- .supports_get = 1,
.data = NULL,
.key= __FILE__,
};
-
-struct ast_str *ast_http_error(int status, const char *title, const char *extra_header, const char *text)
+
+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];
+ int content_length = 0;
+ int close_connection;
+ struct ast_str *server_header_field = ast_str_create(MAX_SERVER_NAME_LENGTH);
+
+ if (!ser || !ser->f || !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 http header */
+ fprintf(ser->f,
+ "HTTP/1.1 %d %s\r\n"
+ "%s"
+ "Date: %s\r\n"
+ "%s"
+ "%s"
+ "%s"
+ "Content-Length: %d\r\n"
+ "\r\n",
+ 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 */
+ if (method != AST_HTTP_HEAD || status_code >= 400) {
+ if (out && ast_str_strlen(out)) {
+ if (fwrite(ast_str_buffer(out), ast_str_strlen(out), 1, ser->f) != 1) {
+ ast_log(LOG_ERROR, "fwrite() failed: %s\n", strerror(errno));
+ close_connection = 1;
+ }
+ }
+
+ if (fd) {
+ char buf[256];
+ int len;
+
+ while ((len = read(fd, buf, sizeof(buf))) > 0) {
+ if (fwrite(buf, len, 1, ser->f) != 1) {
+ ast_log(LOG_WARNING, "fwrite() 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)
{
- struct ast_str *out = ast_str_create(512);
+ 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 && ser->f) {
+ 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);
+}
- if (out == NULL) {
- return out;
+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_str_set(&out, 0,
- "Content-type: text/html\r\n"
- "%s"
- "\r\n"
- "<!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"
- "<address>Asterisk Server</address>\r\n"
- "</body></html>\r\n",
- (extra_header ? extra_header : ""), status, title, title, text);
+ 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");
+ }
- return out;
+ ast_http_create_response(ser,
+ status_code,
+ status_title,
+ http_header_data,
+ text);
}
-/*! \brief
- * Link the new uri into the list.
+/*!
+ * \brief Link the new uri into the list.
*
* They are sorted by length of
* the string, not alphabetically. Duplicate entries are not replaced,
struct ast_http_uri *uri;
int len = strlen(urih->uri);
- if (!(urih->supports_get || urih->supports_post)) {
- ast_log(LOG_WARNING, "URI handler does not provide either GET or POST method: %s (%s)\n", urih->uri, urih->description);
- return -1;
- }
-
AST_RWLIST_WRLOCK(&uris);
- if (AST_RWLIST_EMPTY(&uris) || strlen(AST_RWLIST_FIRST(&uris)->uri) <= len) {
+ 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) {
+ strlen(AST_RWLIST_NEXT(uri, entry)->uri) <= len) {
AST_RWLIST_INSERT_AFTER(&uris, uri, urih, entry);
- AST_RWLIST_UNLOCK(&uris);
+ 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_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_TRAVERSE_SAFE_END;
+ AST_RWLIST_UNLOCK(&uris);
}
-/*
- * Decode special characters in http uri.
- * We have ast_uri_decode to handle %XX sequences, but spaces
- * are encoded as a '+' so we need to replace them beforehand.
+/*!
+ * \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 void http_decode(char *s)
+static const char *get_header(struct ast_variable *headers, const char *field_name)
{
- char *t;
-
- for (t = s; *t; t++) {
- if (*t == '+')
- *t = ' ';
- }
+ struct ast_variable *v;
- ast_uri_decode(s);
+ for (v = headers; v; v = v->next) {
+ if (!strcasecmp(v->name, field_name)) {
+ return v->value;
+ }
+ }
+ return NULL;
}
-static struct ast_str *handle_uri(struct ast_tcptls_session_instance *ser, char *uri, enum ast_http_method method,
- int *status, char **title, int *contentlength, struct ast_variable **cookies, struct ast_variable *headers,
- unsigned int *static_content)
+/*!
+ * \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)
{
- char *c;
- struct ast_str *out = NULL;
- char *params = uri;
- struct ast_http_uri *urih = NULL;
- int l;
- struct ast_variable *vars = NULL, *v, *prev = NULL;
- struct http_uri_redirect *redirect;
- int saw_method = 0;
-
- /* preserve previous behavior of only support URI parameters on GET requests */
- if (method == AST_HTTP_GET) {
- strsep(¶ms, "?");
-
- /* Extract arguments from the request and store them in variables.
- * Note that a request can have multiple arguments with the same
- * name, and we store them all in the list of variables.
- * It is up to the application to handle multiple values.
- */
- if (params) {
- char *var, *val;
-
- while ((val = strsep(¶ms, "&"))) {
- var = strsep(&val, "=");
- if (val) {
- http_decode(val);
- } else {
- val = "";
- }
- http_decode(var);
- if ((v = ast_variable_new(var, val, ""))) {
- if (vars) {
- prev->next = v;
- } else {
- vars = v;
- }
- prev = v;
- }
- }
- }
- }
+ const char *content_type = get_header(headers, "Content-Type");
+ const char *param;
+ size_t size;
- /*
- * Append the cookies to the list of variables.
- * This saves a pass in the cookies list, but has the side effect
- * that a variable might mask a cookie with the same name if the
- * application stops at the first match.
- * Note that this is the same behaviour as $_REQUEST variables in PHP.
- */
- if (prev) {
- prev->next = *cookies;
- } else {
- vars = *cookies;
+ if (!content_type) {
+ return NULL;
}
- *cookies = NULL;
- http_decode(uri);
+ param = strchr(content_type, ';');
+ size = param ? param - content_type : strlen(content_type);
- AST_RWLIST_RDLOCK(&uri_redirects);
- AST_RWLIST_TRAVERSE(&uri_redirects, redirect, entry) {
- if (!strcasecmp(uri, redirect->target)) {
- char buf[512];
+ return ast_strndup(content_type, size);
+}
- snprintf(buf, sizeof(buf), "Location: %s\r\n", redirect->dest);
- out = ast_http_error((*status = 302),
- (*title = ast_strdup("Moved Temporarily")),
- buf, "There is no spoon...");
+/*!
+ * \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;
- break;
- }
+ if (!content_length) {
+ /* Missing content length; assume zero */
+ return 0;
}
- AST_RWLIST_UNLOCK(&uri_redirects);
- if (redirect) {
- goto cleanup;
+ length = 0;
+ if (sscanf(content_length, "%30d", &length) != 1) {
+ /* Invalid Content-Length value */
+ length = -1;
}
+ return length;
+}
- /* 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) {
- ast_debug(2, "match request [%s] with handler [%s] len %d\n", uri, urih->uri, l);
- if (!saw_method) {
- switch (method) {
- case AST_HTTP_GET:
- if (urih->supports_get) {
- saw_method = 1;
- }
- break;
- case AST_HTTP_POST:
- if (urih->supports_post) {
- saw_method = 1;
- }
- break;
- }
- }
-
- l = strlen(urih->uri);
- c = uri + l; /* candidate */
-
- if (strncasecmp(urih->uri, uri, l) || /* no match */
- (*c && *c != '/')) { /* substring */
- continue;
- }
-
- if (*c == '/') {
- c++;
- }
-
- if (!*c || urih->has_subtree) {
- if (((method == AST_HTTP_GET) && urih->supports_get) ||
- ((method == AST_HTTP_POST) && urih->supports_post)) {
- uri = c;
-
- break;
- }
- }
- }
+/*!
+ * \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");
+}
- if (!urih) {
- AST_RWLIST_UNLOCK(&uris);
- }
- }
+/*!
+ * \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 (method == AST_HTTP_POST && !astman_is_authed(manid_from_vars(vars))) {
- out = ast_http_error((*status = 403),
- (*title = ast_strdup("Access Denied")),
- NULL, "Sorry, I cannot let you do that, Dave.");
- } else if (urih) {
- *static_content = urih->static_content;
- out = urih->callback(ser, urih, uri, method, vars, headers, status, title, contentlength);
- AST_RWLIST_UNLOCK(&uris);
- } else if (saw_method) {
- out = ast_http_error((*status = 404),
- (*title = ast_strdup("Not Found")), NULL,
- "The requested URL was not found on this server.");
- } else {
- out = ast_http_error((*status = 501),
- (*title = ast_strdup("Not Implemented")), NULL,
- "Attempt to use unimplemented / unsupported method");
+ if (connection && !strcasecmp(connection, "close")) {
+ close_connection = -1;
}
+ return close_connection;
+}
-cleanup:
- ast_variables_destroy(vars);
+void ast_http_request_close_on_completion(struct ast_tcptls_session_instance *ser)
+{
+ struct http_worker_private_data *request = ser->private_data;
- return out;
+ ast_set_flag(&request->flags, HTTP_FLAG_CLOSE_ON_COMPLETION);
}
-#ifdef DO_SSL
-#if defined(HAVE_FUNOPEN)
-#define HOOK_T int
-#define LEN_T int
-#else
-#define HOOK_T ssize_t
-#define LEN_T size_t
-#endif
-
/*!
- * replacement read/write functions for SSL support.
- * We use wrappers rather than SSL_read/SSL_write directly so
- * we can put in some debugging.
+ * \internal
+ * \brief Initialize the request tracking information in case of early failure.
+ * \since 12.4.0
+ *
+ * \param request Request tracking information.
+ *
+ * \return Nothing
*/
-/*static HOOK_T ssl_read(void *cookie, char *buf, LEN_T len)
+static void http_request_tracking_init(struct http_worker_private_data *request)
{
- int i = SSL_read(cookie, buf, len-1);
-#if 0
- if (i >= 0)
- buf[i] = '\0';
- ast_verbose("ssl read size %d returns %d <%s>\n", (int)len, i, buf);
-#endif
- return i;
+ 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);
}
-static HOOK_T ssl_write(void *cookie, const char *buf, LEN_T len)
+/*!
+ * \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)
{
-#if 0
- char *s = alloca(len+1);
- strncpy(s, buf, len);
- s[len] = '\0';
- ast_verbose("ssl write size %d <%s>\n", (int)len, s);
-#endif
- return SSL_write(cookie, buf, len);
-}
+ struct http_worker_private_data *request = ser->private_data;
+ const char *transfer_encoding;
-static int ssl_close(void *cookie)
-{
- close(SSL_get_fd(cookie));
- SSL_shutdown(cookie);
- SSL_free(cookie);
+ 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;
-}*/
-#endif /* DO_SSL */
+}
-static struct ast_variable *parse_cookies(char *cookies)
+void ast_http_body_read_status(struct ast_tcptls_session_instance *ser, int read_success)
{
- char *cur;
- struct ast_variable *vars = NULL, *var;
+ 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;
+
+ /* Stay in fread until get all the expected data or timeout. */
+ res = fread(buf, length, 1, ser->f);
+ if (res < 1) {
+ 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)
+{
+ int res;
+ char buf[MAX_HTTP_LINE_LENGTH];/* Discard buffer */
+
+ /* Stay in fread until get all the expected data or timeout. */
+ while (sizeof(buf) < length) {
+ res = fread(buf, sizeof(buf), 1, ser->f);
+ if (res < 1) {
+ ast_log(LOG_WARNING, "Short HTTP request %s (Wanted %zu of remaining %d)\n",
+ what_getting, sizeof(buf), length);
+ return -1;
+ }
+ length -= sizeof(buf);
+ }
+ res = fread(buf, length, 1, ser->f);
+ if (res < 1) {
+ ast_log(LOG_WARNING, "Short HTTP request %s (Wanted %d of remaining %d)\n",
+ what_getting, length, length);
+ 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 (!fgets(header_line, sizeof(header_line), ser->f)) {
+ 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 = fread(chunk_sync, sizeof(chunk_sync), 1, ser->f);
+ if (res < 1) {
+ 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 (!fgets(header_line, sizeof(header_line), ser->f)) {
+ 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;
- /* Skip Cookie: */
- cookies += 8;
-
- while ((cur = strsep(&cookies, ";"))) {
- char *name, *val;
-
name = val = cur;
strsep(&val, "=");
continue;
}
- if (option_debug) {
- ast_log(LOG_DEBUG, "mmm ... cookie! Name: '%s' Value: '%s'\n", name, val);
- }
+ ast_debug(1, "HTTP Cookie, Name: '%s' Value: '%s'\n", name, val);
var = ast_variable_new(name, val, __FILE__);
var->next = vars;
return vars;
}
-static void *httpd_helper_thread(void *data)
+/* get cookie from Request headers */
+struct ast_variable *ast_http_get_cookies(struct ast_variable *headers)
{
- char buf[4096];
- char cookie[4096];
- struct ast_tcptls_session_instance *ser = data;
- struct ast_variable *vars=NULL, *headers = NULL;
- char *uri, *title=NULL;
- int status = 200, contentlength = 0;
- struct ast_str *out = NULL;
- unsigned int static_content = 0;
+ struct ast_variable *v, *cookies = NULL;
- if (!fgets(buf, sizeof(buf), ser->f)) {
- goto done;
+ 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 (!fgets(header_line, sizeof(header_line), ser->f)) {
+ 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 (!fgets(request_line, sizeof(request_line), ser->f)) {
+ return -1;
}
- uri = ast_skip_nonblanks(buf); /* Skip method */
+ /* 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';
}
- uri = ast_skip_blanks(uri); /* Skip white space */
+ 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;
}
- /* process "Cookie: " lines */
- while (fgets(cookie, sizeof(cookie), ser->f)) {
- /* Trim trailing characters */
- ast_trim_blanks(cookie);
- if (ast_strlen_zero(cookie)) {
- break;
- }
- if (!strncasecmp(cookie, "Cookie: ", 8)) {
- vars = parse_cookies(cookie);
- }
+ if (ast_shutdown_final()) {
+ ast_http_error(ser, 503, "Service Unavailable", "Shutdown in progress");
+ return -1;
}
- if (!*uri) {
- out = ast_http_error(400, "Bad Request", NULL, "Invalid Request");
- } else if (strcasecmp(buf, "post") && strcasecmp(buf, "get")) {
- out = ast_http_error(501, "Not Implemented", NULL,
- "Attempt to use unimplemented / unsupported method");
- } else { /* try to serve it */
- out = handle_uri(ser, uri, (!strcasecmp(buf, "get")) ? AST_HTTP_GET : AST_HTTP_POST,
- &status, &title, &contentlength, &vars, headers, &static_content);
+ /* process "Request Headers" lines */
+ if (http_request_headers_get(ser, &headers)) {
+ return -1;
}
- /* If they aren't mopped up already, clean up the cookies */
- if (vars) {
- ast_variables_destroy(vars);
+ transfer_encoding = get_transfer_encoding(headers);
+ /* Transfer encoding defaults to identity */
+ if (!transfer_encoding) {
+ transfer_encoding = "identity";
}
- /* Clean up all the header information pulled as well */
- if (headers) {
- ast_variables_destroy(headers);
+
+ /*
+ * 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 (out) {
- struct timeval tv = ast_tvnow();
- char timebuf[256];
- struct ast_tm tm;
-
- ast_strftime(timebuf, sizeof(timebuf), "%a, %d %b %Y %H:%M:%S %Z", ast_localtime(&tv, &tm, "GMT"));
- fprintf(ser->f,
- "HTTP/1.1 %d %s\r\n"
- "Server: Asterisk/%s\r\n"
- "Date: %s\r\n"
- "Connection: close\r\n"
- "%s",
- status, title ? title : "OK", ast_get_version(), timebuf,
- static_content ? "" : "Cache-Control: no-cache, no-store\r\n");
- /* We set the no-cache headers only for dynamic content.
- * If you want to make sure the static file you requested is not from cache,
- * append a random variable to your GET request. Ex: 'something.html?r=109987734'
- */
- if (!contentlength) { /* opaque body ? just dump it hoping it is properly formatted */
- fprintf(ser->f, "%s", out->str);
- } else {
- char *tmp = strstr(out->str, "\r\n\r\n");
+ 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;
+}
- if (tmp) {
- fprintf(ser->f, "Content-length: %d\r\n", contentlength);
- /* first write the header, then the body */
- fwrite(out->str, 1, (tmp + 4 - out->str), ser->f);
- fwrite(tmp + 4, 1, contentlength, ser->f);
- }
+static void *httpd_helper_thread(void *data)
+{
+ struct ast_tcptls_session_instance *ser = data;
+ struct protoent *p;
+ int flags;
+ int timeout;
+
+ if (!ser || !ser->f) {
+ 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.
+ */
+ p = getprotobyname("tcp");
+ if (p) {
+ int arg = 1;
+
+ if (setsockopt(ser->fd, p->p_proto, TCP_NODELAY, (char *) &arg, sizeof(arg) ) < 0) {
+ ast_log(LOG_WARNING, "Failed to set TCP_NODELAY on HTTP connection: %s\n", strerror(errno));
+ ast_log(LOG_WARNING, "Some HTTP requests may be slow to respond.\n");
}
- ast_free(out);
+ } else {
+ ast_log(LOG_WARNING, "Failed to set TCP_NODELAY on HTTP connection, getprotobyname(\"tcp\") failed\n");
+ ast_log(LOG_WARNING, "Some HTTP requests may be slow to respond.\n");
+ }
+
+ /* make sure socket is non-blocking */
+ flags = fcntl(ser->fd, F_GETFL);
+ flags |= O_NONBLOCK;
+ fcntl(ser->fd, F_SETFL, flags);
+
+ /* 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);
- if (title) {
- ast_free(title);
+ /* 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_tcptls_stream_set_exclusive_input(ser->stream_cookie, 1);
+
+ for (;;) {
+ int ch;
+
+ /* Wait for next potential HTTP request message. */
+ ast_tcptls_stream_set_timeout_inactivity(ser->stream_cookie, timeout);
+ ch = fgetc(ser->f);
+ if (ch == EOF || ungetc(ch, ser->f) == EOF) {
+ /* Between request idle timeout */
+ ast_debug(1, "HTTP idle timeout or peer closed connection.\n");
+ break;
+ }
+
+ ast_tcptls_stream_set_timeout_inactivity(ser->stream_cookie, session_inactivity);
+ if (httpd_process_request(ser) || !ser->f || feof(ser->f)) {
+ /* Break the connection or the connection closed */
+ break;
+ }
+
+ timeout = session_keep_alive;
+ if (timeout <= 0) {
+ /* Persistent connections not enabled. */
+ break;
+ }
}
done:
- fclose(ser->f);
- ao2_ref(ser, -1);
- ser = NULL;
+ ast_atomic_fetchadd_int(&session_count, -1);
+ if (ser->f) {
+ ast_debug(1, "HTTP closing session. Top level\n");
+ ast_tcptls_close_session_file(ser);
+ }
+ ao2_ref(ser, -1);
return NULL;
}
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) {
+ 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);
}
AST_RWLIST_TRAVERSE(&uri_redirects, cur, entry) {
- if (AST_RWLIST_NEXT(cur, entry)
- && strlen(AST_RWLIST_NEXT(cur, entry)->target) <= target_len) {
+ 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);
-
+ AST_RWLIST_UNLOCK(&uri_redirects);
return;
}
}
struct ast_variable *v;
int enabled=0;
int newenablestatic=0;
- struct hostent *hp;
- struct ast_hostent ahp;
char newprefix[MAX_PREFIX] = "";
- int have_sslbindaddr = 0;
+ 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;
- if ((cfg = ast_config_load2("http.conf", "http", config_flags)) == CONFIG_STATUS_FILEUNCHANGED) {
+ cfg = ast_config_load2("http.conf", "http", config_flags);
+ if (!cfg || cfg == CONFIG_STATUS_FILEUNCHANGED || cfg == CONFIG_STATUS_FILEINVALID) {
return 0;
}
- /* default values */
- memset(&http_desc.sin, 0, sizeof(http_desc.sin));
- http_desc.sin.sin_port = htons(8088);
-
- memset(&https_desc.sin, 0, sizeof(https_desc.sin));
- https_desc.sin.sin_port = htons(8089);
+ http_tls_was_enabled = (reload && http_tls_cfg.enabled);
http_tls_cfg.enabled = 0;
if (http_tls_cfg.certfile) {
ast_free(http_tls_cfg.certfile);
}
http_tls_cfg.certfile = ast_strdup(AST_CERTFILE);
+
+ if (http_tls_cfg.pvtfile) {
+ 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);
+
if (http_tls_cfg.cipher) {
ast_free(http_tls_cfg.cipher);
}
- http_tls_cfg.cipher = ast_strdup("");
+ 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_RWLIST_UNLOCK(&uri_redirects);
- if (cfg) {
- v = ast_variable_browse(cfg, "general");
- for (; v; v = v->next) {
- if (!strcasecmp(v->name, "enabled")) {
- enabled = ast_true(v->value);
- } else if (!strcasecmp(v->name, "sslenable")) {
- http_tls_cfg.enabled = ast_true(v->value);
- } else if (!strcasecmp(v->name, "sslbindport")) {
- https_desc.sin.sin_port = htons(atoi(v->value));
- } else if (!strcasecmp(v->name, "sslcert")) {
- ast_free(http_tls_cfg.certfile);
- http_tls_cfg.certfile = ast_strdup(v->value);
- } else if (!strcasecmp(v->name, "sslcipher")) {
- ast_free(http_tls_cfg.cipher);
- http_tls_cfg.cipher = ast_strdup(v->value);
- } else if (!strcasecmp(v->name, "enablestatic")) {
- newenablestatic = ast_true(v->value);
- } else if (!strcasecmp(v->name, "bindport")) {
- http_desc.sin.sin_port = htons(atoi(v->value));
- } else if (!strcasecmp(v->name, "sslbindaddr")) {
- if ((hp = ast_gethostbyname(v->value, &ahp))) {
- memcpy(&https_desc.sin.sin_addr, hp->h_addr, sizeof(https_desc.sin.sin_addr));
- have_sslbindaddr = 1;
- } else {
- ast_log(LOG_WARNING, "Invalid bind address '%s'\n", v->value);
- }
- } else if (!strcasecmp(v->name, "bindaddr")) {
- if ((hp = ast_gethostbyname(v->value, &ahp))) {
- memcpy(&http_desc.sin.sin_addr, hp->h_addr, sizeof(http_desc.sin.sin_addr));
- } else {
- 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);
+ 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 {
- ast_log(LOG_WARNING, "Ignoring unknown option '%s' in http.conf\n", v->name);
+ 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 (!have_sslbindaddr) {
- https_desc.sin.sin_addr = http_desc.sin.sin_addr;
- }
- if (enabled) {
- http_desc.sin.sin_family = https_desc.sin.sin_family = AF_INET;
- }
+ 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;
- ast_tcptls_server_start(&http_desc);
- if (ast_ssl_setup(https_desc.tls_cfg)) {
- ast_tcptls_server_start(&https_desc);
+
+ 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;
switch (cmd) {
case CLI_INIT:
e->command = "http show status";
- e->usage =
+ 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);
- if (!http_desc.oldsin.sin_family) {
+ 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:%d\n\n",
- ast_inet_ntoa(http_desc.oldsin.sin_addr),
- ntohs(http_desc.oldsin.sin_port));
+ 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:%d\n\n",
- ast_inet_ntoa(https_desc.oldsin.sin_addr),
- ntohs(https_desc.oldsin.sin_port));
+ ast_cli(a->fd, "HTTPS Server Enabled and Bound to %s\n\n",
+ ast_sockaddr_stringify(&https_desc.old_address));
}
}
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_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_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_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.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, sizeof(cli_http) / sizeof(struct ast_cli_entry));
+ ast_cli_register_multiple(cli_http, ARRAY_LEN(cli_http));
+ ast_register_cleanup(http_shutdown);
return __ast_http_load(0);
}
projects / asterisk/asterisk.git / blobdiff