252 lines
6.5 KiB
C
252 lines
6.5 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#if !defined(CURL_DISABLE_PROXY)
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#include <curl/curl.h>
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#include "urldata.h"
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#include "cfilters.h"
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#include "cf-haproxy.h"
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#include "curl_trc.h"
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#include "multiif.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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typedef enum {
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HAPROXY_INIT, /* init/default/no tunnel state */
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HAPROXY_SEND, /* data_out being sent */
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HAPROXY_DONE /* all work done */
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} haproxy_state;
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struct cf_haproxy_ctx {
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int state;
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struct dynbuf data_out;
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};
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static void cf_haproxy_ctx_reset(struct cf_haproxy_ctx *ctx)
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{
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DEBUGASSERT(ctx);
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ctx->state = HAPROXY_INIT;
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Curl_dyn_reset(&ctx->data_out);
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}
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static void cf_haproxy_ctx_free(struct cf_haproxy_ctx *ctx)
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{
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if(ctx) {
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Curl_dyn_free(&ctx->data_out);
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free(ctx);
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}
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}
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static CURLcode cf_haproxy_date_out_set(struct Curl_cfilter*cf,
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struct Curl_easy *data)
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{
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struct cf_haproxy_ctx *ctx = cf->ctx;
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CURLcode result;
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const char *tcp_version;
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const char *client_ip;
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DEBUGASSERT(ctx);
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DEBUGASSERT(ctx->state == HAPROXY_INIT);
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#ifdef USE_UNIX_SOCKETS
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if(cf->conn->unix_domain_socket)
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/* the buffer is large enough to hold this! */
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result = Curl_dyn_addn(&ctx->data_out, STRCONST("PROXY UNKNOWN\r\n"));
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else {
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#endif /* USE_UNIX_SOCKETS */
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/* Emit the correct prefix for IPv6 */
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tcp_version = cf->conn->bits.ipv6 ? "TCP6" : "TCP4";
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if(data->set.str[STRING_HAPROXY_CLIENT_IP])
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client_ip = data->set.str[STRING_HAPROXY_CLIENT_IP];
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else
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client_ip = data->info.conn_local_ip;
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result = Curl_dyn_addf(&ctx->data_out, "PROXY %s %s %s %i %i\r\n",
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tcp_version,
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client_ip,
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data->info.conn_primary_ip,
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data->info.conn_local_port,
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data->info.conn_primary_port);
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#ifdef USE_UNIX_SOCKETS
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}
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#endif /* USE_UNIX_SOCKETS */
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return result;
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}
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static CURLcode cf_haproxy_connect(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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bool blocking, bool *done)
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{
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struct cf_haproxy_ctx *ctx = cf->ctx;
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CURLcode result;
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size_t len;
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DEBUGASSERT(ctx);
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if(cf->connected) {
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*done = TRUE;
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return CURLE_OK;
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}
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result = cf->next->cft->do_connect(cf->next, data, blocking, done);
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if(result || !*done)
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return result;
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switch(ctx->state) {
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case HAPROXY_INIT:
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result = cf_haproxy_date_out_set(cf, data);
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if(result)
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goto out;
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ctx->state = HAPROXY_SEND;
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/* FALLTHROUGH */
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case HAPROXY_SEND:
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len = Curl_dyn_len(&ctx->data_out);
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if(len > 0) {
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ssize_t written = Curl_conn_send(data, cf->sockindex,
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Curl_dyn_ptr(&ctx->data_out),
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len, &result);
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if(written < 0)
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goto out;
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Curl_dyn_tail(&ctx->data_out, len - (size_t)written);
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if(Curl_dyn_len(&ctx->data_out) > 0) {
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result = CURLE_OK;
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goto out;
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}
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}
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ctx->state = HAPROXY_DONE;
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/* FALLTHROUGH */
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default:
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Curl_dyn_free(&ctx->data_out);
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break;
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}
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out:
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*done = (!result) && (ctx->state == HAPROXY_DONE);
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cf->connected = *done;
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return result;
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}
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static void cf_haproxy_destroy(struct Curl_cfilter *cf,
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struct Curl_easy *data)
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{
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(void)data;
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CURL_TRC_CF(data, cf, "destroy");
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cf_haproxy_ctx_free(cf->ctx);
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}
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static void cf_haproxy_close(struct Curl_cfilter *cf,
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struct Curl_easy *data)
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{
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CURL_TRC_CF(data, cf, "close");
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cf->connected = FALSE;
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cf_haproxy_ctx_reset(cf->ctx);
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if(cf->next)
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cf->next->cft->do_close(cf->next, data);
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}
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static int cf_haproxy_get_select_socks(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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curl_socket_t *socks)
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{
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int fds;
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fds = cf->next->cft->get_select_socks(cf->next, data, socks);
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if(!fds && cf->next->connected && !cf->connected) {
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/* If we are not connected, but the filter "below" is
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* and not waiting on something, we are sending. */
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socks[0] = Curl_conn_cf_get_socket(cf, data);
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return GETSOCK_WRITESOCK(0);
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}
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return fds;
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}
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struct Curl_cftype Curl_cft_haproxy = {
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"HAPROXY",
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0,
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0,
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cf_haproxy_destroy,
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cf_haproxy_connect,
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cf_haproxy_close,
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Curl_cf_def_get_host,
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cf_haproxy_get_select_socks,
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Curl_cf_def_data_pending,
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Curl_cf_def_send,
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Curl_cf_def_recv,
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Curl_cf_def_cntrl,
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Curl_cf_def_conn_is_alive,
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Curl_cf_def_conn_keep_alive,
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Curl_cf_def_query,
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};
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static CURLcode cf_haproxy_create(struct Curl_cfilter **pcf,
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struct Curl_easy *data)
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{
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struct Curl_cfilter *cf = NULL;
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struct cf_haproxy_ctx *ctx;
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CURLcode result;
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(void)data;
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ctx = calloc(sizeof(*ctx), 1);
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if(!ctx) {
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result = CURLE_OUT_OF_MEMORY;
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goto out;
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}
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ctx->state = HAPROXY_INIT;
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Curl_dyn_init(&ctx->data_out, DYN_HAXPROXY);
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result = Curl_cf_create(&cf, &Curl_cft_haproxy, ctx);
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if(result)
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goto out;
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ctx = NULL;
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out:
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cf_haproxy_ctx_free(ctx);
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*pcf = result? NULL : cf;
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return result;
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}
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CURLcode Curl_cf_haproxy_insert_after(struct Curl_cfilter *cf_at,
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struct Curl_easy *data)
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{
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struct Curl_cfilter *cf;
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CURLcode result;
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result = cf_haproxy_create(&cf, data);
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if(result)
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goto out;
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Curl_conn_cf_insert_after(cf_at, cf);
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out:
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return result;
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}
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#endif /* !CURL_DISABLE_PROXY */
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