Bump uhttpd version 2016-10-25
This commit is contained in:
jbnadal
656
src/3P/uhttpd/client.c
Normal file
656
src/3P/uhttpd/client.c
Normal file
@@ -0,0 +1,656 @@
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/*
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* uhttpd - Tiny single-threaded httpd
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*
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* Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
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* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <libubox/blobmsg.h>
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#include <ctype.h>
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#include "uhttpd.h"
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#include "tls.h"
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static LIST_HEAD(clients);
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static bool client_done = false;
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int n_clients = 0;
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struct config conf = {};
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const char * const http_versions[] = {
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[UH_HTTP_VER_0_9] = "HTTP/0.9",
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[UH_HTTP_VER_1_0] = "HTTP/1.0",
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[UH_HTTP_VER_1_1] = "HTTP/1.1",
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};
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const char * const http_methods[] = {
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[UH_HTTP_MSG_GET] = "GET",
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[UH_HTTP_MSG_POST] = "POST",
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[UH_HTTP_MSG_HEAD] = "HEAD",
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[UH_HTTP_MSG_OPTIONS] = "OPTIONS",
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};
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void uh_http_header(struct client *cl, int code, const char *summary)
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{
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struct http_request *r = &cl->request;
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struct blob_attr *cur;
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const char *enc = "Transfer-Encoding: chunked\r\n";
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const char *conn;
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int rem;
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cl->http_code = code;
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if (!uh_use_chunked(cl))
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enc = "";
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if (r->connection_close)
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conn = "Connection: close";
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else
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conn = "Connection: Keep-Alive";
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ustream_printf(cl->us, "%s %03i %s\r\n%s\r\n%s",
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http_versions[cl->request.version],
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code, summary, conn, enc);
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if (!r->connection_close)
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ustream_printf(cl->us, "Keep-Alive: timeout=%d\r\n", conf.http_keepalive);
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blobmsg_for_each_attr(cur, cl->hdr_response.head, rem)
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ustream_printf(cl->us, "%s: %s\r\n", blobmsg_name(cur),
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blobmsg_get_string(cur));
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}
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static void uh_connection_close(struct client *cl)
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{
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cl->state = CLIENT_STATE_CLOSE;
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cl->us->eof = true;
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ustream_state_change(cl->us);
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}
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static void uh_dispatch_done(struct client *cl)
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{
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if (cl->dispatch.free)
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cl->dispatch.free(cl);
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if (cl->dispatch.req_free)
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cl->dispatch.req_free(cl);
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}
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static void client_timeout(struct uloop_timeout *timeout)
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{
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struct client *cl = container_of(timeout, struct client, timeout);
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cl->state = CLIENT_STATE_CLOSE;
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uh_connection_close(cl);
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}
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static void uh_set_client_timeout(struct client *cl, int timeout)
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{
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cl->timeout.cb = client_timeout;
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uloop_timeout_set(&cl->timeout, timeout * 1000);
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}
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static void uh_keepalive_poll_cb(struct uloop_timeout *timeout)
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{
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struct client *cl = container_of(timeout, struct client, timeout);
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int sec = cl->requests > 0 ? conf.http_keepalive : conf.network_timeout;
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uh_set_client_timeout(cl, sec);
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cl->us->notify_read(cl->us, 0);
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}
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static void uh_poll_connection(struct client *cl)
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{
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cl->timeout.cb = uh_keepalive_poll_cb;
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uloop_timeout_set(&cl->timeout, 1);
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}
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void uh_request_done(struct client *cl)
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{
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uh_chunk_eof(cl);
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uh_dispatch_done(cl);
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blob_buf_init(&cl->hdr_response, 0);
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memset(&cl->dispatch, 0, sizeof(cl->dispatch));
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if (!conf.http_keepalive || cl->request.connection_close)
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return uh_connection_close(cl);
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cl->state = CLIENT_STATE_INIT;
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cl->requests++;
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uh_poll_connection(cl);
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}
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void __printf(4, 5)
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uh_client_error(struct client *cl, int code, const char *summary, const char *fmt, ...)
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{
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va_list arg;
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uh_http_header(cl, code, summary);
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ustream_printf(cl->us, "Content-Type: text/html\r\n\r\n");
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uh_chunk_printf(cl, "<h1>%s</h1>", summary);
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if (fmt) {
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va_start(arg, fmt);
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uh_chunk_vprintf(cl, fmt, arg);
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va_end(arg);
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}
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uh_request_done(cl);
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}
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static void uh_header_error(struct client *cl, int code, const char *summary)
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{
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uh_client_error(cl, code, summary, NULL);
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uh_connection_close(cl);
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}
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static int find_idx(const char * const *list, int max, const char *str)
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{
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int i;
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for (i = 0; i < max; i++)
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if (!strcmp(list[i], str))
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return i;
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return -1;
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}
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static int client_parse_request(struct client *cl, char *data)
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{
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struct http_request *req = &cl->request;
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char *type, *path, *version;
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int h_method, h_version;
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type = strtok(data, " ");
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path = strtok(NULL, " ");
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version = strtok(NULL, " ");
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if (!type || !path || !version)
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return CLIENT_STATE_DONE;
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blobmsg_add_string(&cl->hdr, "URL", path);
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memset(&cl->request, 0, sizeof(cl->request));
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h_method = find_idx(http_methods, ARRAY_SIZE(http_methods), type);
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h_version = find_idx(http_versions, ARRAY_SIZE(http_versions), version);
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if (h_method < 0 || h_version < 0) {
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req->version = UH_HTTP_VER_1_0;
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return CLIENT_STATE_DONE;
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}
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req->method = h_method;
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req->version = h_version;
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if (req->version < UH_HTTP_VER_1_1 || req->method == UH_HTTP_MSG_POST ||
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!conf.http_keepalive)
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req->connection_close = true;
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return CLIENT_STATE_HEADER;
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}
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static bool client_init_cb(struct client *cl, char *buf, int len)
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{
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char *newline;
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newline = strstr(buf, "\r\n");
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if (!newline)
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return false;
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if (newline == buf) {
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ustream_consume(cl->us, 2);
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return true;
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}
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*newline = 0;
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blob_buf_init(&cl->hdr, 0);
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cl->state = client_parse_request(cl, buf);
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ustream_consume(cl->us, newline + 2 - buf);
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if (cl->state == CLIENT_STATE_DONE)
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uh_header_error(cl, 400, "Bad Request");
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return true;
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}
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static bool rfc1918_filter_check(struct client *cl)
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{
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if (!conf.rfc1918_filter)
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return true;
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if (!uh_addr_rfc1918(&cl->peer_addr) || uh_addr_rfc1918(&cl->srv_addr))
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return true;
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uh_client_error(cl, 403, "Forbidden",
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"Rejected request from RFC1918 IP "
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"to public server address");
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return false;
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}
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static bool tls_redirect_check(struct client *cl)
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{
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int rem, port;
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struct blob_attr *cur;
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char *ptr, *url = NULL, *host = NULL;
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if (cl->tls || !conf.tls_redirect)
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return true;
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if ((port = uh_first_tls_port(cl->srv_addr.family)) == -1)
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return true;
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blob_for_each_attr(cur, cl->hdr.head, rem) {
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if (!strcmp(blobmsg_name(cur), "host"))
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host = blobmsg_get_string(cur);
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if (!strcmp(blobmsg_name(cur), "URL"))
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url = blobmsg_get_string(cur);
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if (url && host)
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break;
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}
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if (!url || !host)
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return true;
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if ((ptr = strchr(host, ']')) != NULL)
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*(ptr+1) = 0;
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else if ((ptr = strchr(host, ':')) != NULL)
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*ptr = 0;
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cl->request.disable_chunked = true;
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cl->request.connection_close = true;
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uh_http_header(cl, 307, "Temporary Redirect");
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if (port != 443)
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ustream_printf(cl->us, "Location: https://%s:%d%s\r\n\r\n", host, port, url);
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else
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ustream_printf(cl->us, "Location: https://%s%s\r\n\r\n", host, url);
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uh_request_done(cl);
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return false;
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}
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static void client_header_complete(struct client *cl)
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{
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struct http_request *r = &cl->request;
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if (!rfc1918_filter_check(cl))
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return;
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if (!tls_redirect_check(cl))
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return;
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if (r->expect_cont)
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ustream_printf(cl->us, "HTTP/1.1 100 Continue\r\n\r\n");
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switch(r->ua) {
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case UH_UA_MSIE_OLD:
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if (r->method != UH_HTTP_MSG_POST)
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break;
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/* fall through */
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case UH_UA_SAFARI:
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r->connection_close = true;
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break;
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default:
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break;
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}
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uh_handle_request(cl);
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}
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static void client_parse_header(struct client *cl, char *data)
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{
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struct http_request *r = &cl->request;
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char *err;
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char *name;
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char *val;
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if (!*data) {
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uloop_timeout_cancel(&cl->timeout);
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cl->state = CLIENT_STATE_DATA;
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client_header_complete(cl);
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return;
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}
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val = uh_split_header(data);
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if (!val) {
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cl->state = CLIENT_STATE_DONE;
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return;
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}
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for (name = data; *name; name++)
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if (isupper(*name))
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*name = tolower(*name);
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if (!strcmp(data, "expect")) {
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if (!strcasecmp(val, "100-continue"))
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r->expect_cont = true;
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else {
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uh_header_error(cl, 412, "Precondition Failed");
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return;
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}
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} else if (!strcmp(data, "content-length")) {
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r->content_length = strtoul(val, &err, 0);
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if (err && *err) {
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uh_header_error(cl, 400, "Bad Request");
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return;
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}
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} else if (!strcmp(data, "transfer-encoding")) {
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if (!strcmp(val, "chunked"))
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r->transfer_chunked = true;
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} else if (!strcmp(data, "connection")) {
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if (!strcasecmp(val, "close"))
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r->connection_close = true;
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} else if (!strcmp(data, "user-agent")) {
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char *str;
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if (strstr(val, "Opera"))
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r->ua = UH_UA_OPERA;
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else if ((str = strstr(val, "MSIE ")) != NULL) {
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r->ua = UH_UA_MSIE_NEW;
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if (str[5] && str[6] == '.') {
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switch (str[5]) {
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case '6':
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if (strstr(str, "SV1"))
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break;
|
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/* fall through */
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case '5':
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||||
case '4':
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r->ua = UH_UA_MSIE_OLD;
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break;
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}
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}
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}
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else if (strstr(val, "Chrome/"))
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r->ua = UH_UA_CHROME;
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else if (strstr(val, "Safari/") && strstr(val, "Mac OS X"))
|
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r->ua = UH_UA_SAFARI;
|
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else if (strstr(val, "Gecko/"))
|
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r->ua = UH_UA_GECKO;
|
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else if (strstr(val, "Konqueror"))
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r->ua = UH_UA_KONQUEROR;
|
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}
|
||||
|
||||
|
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blobmsg_add_string(&cl->hdr, data, val);
|
||||
|
||||
cl->state = CLIENT_STATE_HEADER;
|
||||
}
|
||||
|
||||
void client_poll_post_data(struct client *cl)
|
||||
{
|
||||
struct dispatch *d = &cl->dispatch;
|
||||
struct http_request *r = &cl->request;
|
||||
char *buf;
|
||||
int len;
|
||||
|
||||
if (cl->state == CLIENT_STATE_DONE)
|
||||
return;
|
||||
|
||||
while (1) {
|
||||
char *sep;
|
||||
int offset = 0;
|
||||
int cur_len;
|
||||
|
||||
buf = ustream_get_read_buf(cl->us, &len);
|
||||
if (!buf || !len)
|
||||
break;
|
||||
|
||||
if (!d->data_send)
|
||||
return;
|
||||
|
||||
cur_len = min(r->content_length, len);
|
||||
if (cur_len) {
|
||||
if (d->data_blocked)
|
||||
break;
|
||||
|
||||
if (d->data_send)
|
||||
cur_len = d->data_send(cl, buf, cur_len);
|
||||
|
||||
r->content_length -= cur_len;
|
||||
ustream_consume(cl->us, cur_len);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!r->transfer_chunked)
|
||||
break;
|
||||
|
||||
if (r->transfer_chunked > 1)
|
||||
offset = 2;
|
||||
|
||||
sep = strstr(buf + offset, "\r\n");
|
||||
if (!sep)
|
||||
break;
|
||||
|
||||
*sep = 0;
|
||||
|
||||
r->content_length = strtoul(buf + offset, &sep, 16);
|
||||
r->transfer_chunked++;
|
||||
ustream_consume(cl->us, sep + 2 - buf);
|
||||
|
||||
/* invalid chunk length */
|
||||
if (sep && *sep) {
|
||||
r->content_length = 0;
|
||||
r->transfer_chunked = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
/* empty chunk == eof */
|
||||
if (!r->content_length) {
|
||||
r->transfer_chunked = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
buf = ustream_get_read_buf(cl->us, &len);
|
||||
if (!r->content_length && !r->transfer_chunked &&
|
||||
cl->state != CLIENT_STATE_DONE) {
|
||||
if (cl->dispatch.data_done)
|
||||
cl->dispatch.data_done(cl);
|
||||
|
||||
cl->state = CLIENT_STATE_DONE;
|
||||
}
|
||||
}
|
||||
|
||||
static bool client_data_cb(struct client *cl, char *buf, int len)
|
||||
{
|
||||
client_poll_post_data(cl);
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool client_header_cb(struct client *cl, char *buf, int len)
|
||||
{
|
||||
char *newline;
|
||||
int line_len;
|
||||
|
||||
newline = strstr(buf, "\r\n");
|
||||
if (!newline)
|
||||
return false;
|
||||
|
||||
*newline = 0;
|
||||
client_parse_header(cl, buf);
|
||||
line_len = newline + 2 - buf;
|
||||
ustream_consume(cl->us, line_len);
|
||||
if (cl->state == CLIENT_STATE_DATA)
|
||||
return client_data_cb(cl, newline + 2, len - line_len);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
typedef bool (*read_cb_t)(struct client *cl, char *buf, int len);
|
||||
static read_cb_t read_cbs[] = {
|
||||
[CLIENT_STATE_INIT] = client_init_cb,
|
||||
[CLIENT_STATE_HEADER] = client_header_cb,
|
||||
[CLIENT_STATE_DATA] = client_data_cb,
|
||||
};
|
||||
|
||||
void uh_client_read_cb(struct client *cl)
|
||||
{
|
||||
struct ustream *us = cl->us;
|
||||
char *str;
|
||||
int len;
|
||||
|
||||
client_done = false;
|
||||
do {
|
||||
str = ustream_get_read_buf(us, &len);
|
||||
if (!str || !len)
|
||||
break;
|
||||
|
||||
if (cl->state >= array_size(read_cbs) || !read_cbs[cl->state])
|
||||
break;
|
||||
|
||||
if (!read_cbs[cl->state](cl, str, len)) {
|
||||
if (len == us->r.buffer_len &&
|
||||
cl->state != CLIENT_STATE_DATA)
|
||||
uh_header_error(cl, 413, "Request Entity Too Large");
|
||||
break;
|
||||
}
|
||||
} while (!client_done);
|
||||
}
|
||||
|
||||
static void client_close(struct client *cl)
|
||||
{
|
||||
if (cl->refcount) {
|
||||
cl->state = CLIENT_STATE_CLEANUP;
|
||||
return;
|
||||
}
|
||||
|
||||
client_done = true;
|
||||
n_clients--;
|
||||
uh_dispatch_done(cl);
|
||||
uloop_timeout_cancel(&cl->timeout);
|
||||
if (cl->tls)
|
||||
uh_tls_client_detach(cl);
|
||||
ustream_free(&cl->sfd.stream);
|
||||
close(cl->sfd.fd.fd);
|
||||
list_del(&cl->list);
|
||||
blob_buf_free(&cl->hdr);
|
||||
blob_buf_free(&cl->hdr_response);
|
||||
free(cl);
|
||||
|
||||
uh_unblock_listeners();
|
||||
}
|
||||
|
||||
void uh_client_notify_state(struct client *cl)
|
||||
{
|
||||
struct ustream *s = cl->us;
|
||||
|
||||
if (!s->write_error && cl->state != CLIENT_STATE_CLEANUP) {
|
||||
if (cl->state == CLIENT_STATE_DATA)
|
||||
return;
|
||||
|
||||
if (!s->eof || s->w.data_bytes)
|
||||
return;
|
||||
}
|
||||
|
||||
return client_close(cl);
|
||||
}
|
||||
|
||||
static void client_ustream_read_cb(struct ustream *s, int bytes)
|
||||
{
|
||||
struct client *cl = container_of(s, struct client, sfd.stream);
|
||||
|
||||
uh_client_read_cb(cl);
|
||||
}
|
||||
|
||||
static void client_ustream_write_cb(struct ustream *s, int bytes)
|
||||
{
|
||||
struct client *cl = container_of(s, struct client, sfd.stream);
|
||||
|
||||
if (cl->dispatch.write_cb)
|
||||
cl->dispatch.write_cb(cl);
|
||||
}
|
||||
|
||||
static void client_notify_state(struct ustream *s)
|
||||
{
|
||||
struct client *cl = container_of(s, struct client, sfd.stream);
|
||||
|
||||
uh_client_notify_state(cl);
|
||||
}
|
||||
|
||||
static void set_addr(struct uh_addr *addr, void *src)
|
||||
{
|
||||
struct sockaddr_in *sin = src;
|
||||
struct sockaddr_in6 *sin6 = src;
|
||||
|
||||
addr->family = sin->sin_family;
|
||||
if (addr->family == AF_INET) {
|
||||
addr->port = ntohs(sin->sin_port);
|
||||
memcpy(&addr->in, &sin->sin_addr, sizeof(addr->in));
|
||||
} else {
|
||||
addr->port = ntohs(sin6->sin6_port);
|
||||
memcpy(&addr->in6, &sin6->sin6_addr, sizeof(addr->in6));
|
||||
}
|
||||
}
|
||||
|
||||
bool uh_accept_client(int fd, bool tls)
|
||||
{
|
||||
static struct client *next_client;
|
||||
struct client *cl;
|
||||
unsigned int sl;
|
||||
int sfd;
|
||||
static int client_id = 0;
|
||||
struct sockaddr_in6 addr;
|
||||
|
||||
if (!next_client)
|
||||
next_client = calloc(1, sizeof(*next_client));
|
||||
|
||||
cl = next_client;
|
||||
|
||||
sl = sizeof(addr);
|
||||
sfd = accept(fd, (struct sockaddr *) &addr, &sl);
|
||||
if (sfd < 0)
|
||||
return false;
|
||||
|
||||
set_addr(&cl->peer_addr, &addr);
|
||||
sl = sizeof(addr);
|
||||
getsockname(sfd, (struct sockaddr *) &addr, &sl);
|
||||
set_addr(&cl->srv_addr, &addr);
|
||||
|
||||
cl->us = &cl->sfd.stream;
|
||||
if (tls) {
|
||||
uh_tls_client_attach(cl);
|
||||
} else {
|
||||
cl->us->notify_read = client_ustream_read_cb;
|
||||
cl->us->notify_write = client_ustream_write_cb;
|
||||
cl->us->notify_state = client_notify_state;
|
||||
}
|
||||
|
||||
cl->us->string_data = true;
|
||||
ustream_fd_init(&cl->sfd, sfd);
|
||||
|
||||
uh_poll_connection(cl);
|
||||
list_add_tail(&cl->list, &clients);
|
||||
|
||||
next_client = NULL;
|
||||
n_clients++;
|
||||
cl->id = client_id++;
|
||||
cl->tls = tls;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void uh_close_fds(void)
|
||||
{
|
||||
struct client *cl;
|
||||
|
||||
uloop_done();
|
||||
uh_close_listen_fds();
|
||||
list_for_each_entry(cl, &clients, list) {
|
||||
close(cl->sfd.fd.fd);
|
||||
if (cl->dispatch.close_fds)
|
||||
cl->dispatch.close_fds(cl);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user