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894 lines
28 KiB
C
894 lines
28 KiB
C
/*-
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* SSLsplit - transparent SSL/TLS interception
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* https://www.roe.ch/SSLsplit
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*
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* Copyright (c) 2009-2018, Daniel Roethlisberger <daniel@roe.ch>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "protohttp.h"
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#include "protossl.h"
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#include "util.h"
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#include "base64.h"
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#include "url.h"
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#include <string.h>
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#include <event2/bufferevent.h>
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typedef struct protohttp_ctx protohttp_ctx_t;
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struct protohttp_ctx {
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unsigned int seen_req_header : 1; /* 0 until request header complete */
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unsigned int seen_resp_header : 1; /* 0 until response hdr complete */
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unsigned int sent_http_conn_close : 1; /* 0 until Conn: close sent */
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unsigned int ocsp_denied : 1; /* 1 if OCSP was denied */
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/* log strings from HTTP request */
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char *http_method;
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char *http_uri;
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char *http_host;
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char *http_content_type;
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/* log strings from HTTP response */
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char *http_status_code;
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char *http_status_text;
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char *http_content_length;
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};
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static void NONNULL(1)
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protohttp_log_connect(pxy_conn_ctx_t *ctx)
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{
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protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
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char *msg;
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#ifdef HAVE_LOCAL_PROCINFO
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char *lpi = NULL;
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#endif /* HAVE_LOCAL_PROCINFO */
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int rv;
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#ifdef HAVE_LOCAL_PROCINFO
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if (ctx->opts->lprocinfo) {
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rv = asprintf(&lpi, "lproc:%i:%s:%s:%s",
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ctx->lproc.pid,
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STRORDASH(ctx->lproc.user),
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STRORDASH(ctx->lproc.group),
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STRORDASH(ctx->lproc.exec_path));
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if ((rv < 0) || !lpi) {
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ctx->enomem = 1;
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goto out;
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}
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}
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#endif /* HAVE_LOCAL_PROCINFO */
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/*
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* The following ifdef's within asprintf arguments list generates
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* warnings with -Wembedded-directive on some compilers.
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* Not fixing the code in order to avoid more code duplication.
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*/
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if (!ctx->spec->ssl) {
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rv = asprintf(&msg, "CONN: http %s %s %s %s %s %s %s %s %s"
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#ifdef HAVE_LOCAL_PROCINFO
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" %s"
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#endif /* HAVE_LOCAL_PROCINFO */
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"%s\n",
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STRORDASH(ctx->srchost_str),
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STRORDASH(ctx->srcport_str),
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STRORDASH(ctx->dsthost_str),
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STRORDASH(ctx->dstport_str),
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STRORDASH(http_ctx->http_host),
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STRORDASH(http_ctx->http_method),
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STRORDASH(http_ctx->http_uri),
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STRORDASH(http_ctx->http_status_code),
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STRORDASH(http_ctx->http_content_length),
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#ifdef HAVE_LOCAL_PROCINFO
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lpi,
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#endif /* HAVE_LOCAL_PROCINFO */
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http_ctx->ocsp_denied ? " ocsp:denied" : "");
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} else {
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rv = asprintf(&msg, "CONN: https %s %s %s %s %s %s %s %s %s "
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"sni:%s names:%s "
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"sproto:%s:%s dproto:%s:%s "
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"origcrt:%s usedcrt:%s"
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#ifdef HAVE_LOCAL_PROCINFO
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" %s"
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#endif /* HAVE_LOCAL_PROCINFO */
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"%s\n",
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STRORDASH(ctx->srchost_str),
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STRORDASH(ctx->srcport_str),
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STRORDASH(ctx->dsthost_str),
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STRORDASH(ctx->dstport_str),
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STRORDASH(http_ctx->http_host),
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STRORDASH(http_ctx->http_method),
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STRORDASH(http_ctx->http_uri),
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STRORDASH(http_ctx->http_status_code),
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STRORDASH(http_ctx->http_content_length),
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STRORDASH(ctx->sslctx->sni),
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STRORDASH(ctx->sslctx->ssl_names),
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SSL_get_version(ctx->src.ssl),
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SSL_get_cipher(ctx->src.ssl),
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!ctx->srv_dst.closed ? SSL_get_version(ctx->srv_dst.ssl):ctx->sslctx->srv_dst_ssl_version,
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!ctx->srv_dst.closed ? SSL_get_cipher(ctx->srv_dst.ssl):ctx->sslctx->srv_dst_ssl_cipher,
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STRORDASH(ctx->sslctx->origcrtfpr),
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STRORDASH(ctx->sslctx->usedcrtfpr),
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#ifdef HAVE_LOCAL_PROCINFO
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lpi,
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#endif /* HAVE_LOCAL_PROCINFO */
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http_ctx->ocsp_denied ? " ocsp:denied" : "");
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}
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if ((rv < 0 ) || !msg) {
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ctx->enomem = 1;
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goto out;
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}
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if (!ctx->opts->detach) {
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log_err_printf("%s", msg);
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} else if (ctx->opts->statslog) {
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if (log_conn(msg) == -1) {
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log_err_level_printf(LOG_WARNING, "Conn logging failed\n");
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}
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}
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if (ctx->opts->connectlog) {
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if (log_connect_print_free(msg) == -1) {
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free(msg);
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log_err_level_printf(LOG_WARNING, "Connection logging failed\n");
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}
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} else {
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free(msg);
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}
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out:
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#ifdef HAVE_LOCAL_PROCINFO
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if (lpi) {
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free(lpi);
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}
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#endif /* HAVE_LOCAL_PROCINFO */
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return;
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}
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/*
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* Return 1 if uri is an OCSP GET URI, 0 if not.
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*/
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static int NONNULL(1,2)
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protohttp_ocsp_is_valid_uri(const char *uri, pxy_conn_ctx_t *ctx)
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{
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char *buf_url;
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size_t sz_url;
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char *buf_b64;
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size_t sz_b64;
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unsigned char *buf_asn1;
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size_t sz_asn1;
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int ret;
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buf_url = strrchr(uri, '/');
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if (!buf_url)
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return 0;
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buf_url++;
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/*
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* Do some quick checks to avoid unnecessary buffer allocations and
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* decoding URL, Base64 and ASN.1:
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* - OCSP requests begin with a SEQUENCE (0x30), so the first Base64
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* byte is 'M' or, unlikely but legal, the URL encoding thereof.
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* - There should be no query string in OCSP GET requests.
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* - Encoded OCSP request ASN.1 blobs are longer than 32 bytes.
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*/
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if (buf_url[0] != 'M' && buf_url[0] != '%')
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return 0;
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if (strchr(uri, '?'))
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return 0;
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sz_url = strlen(buf_url);
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if (sz_url < 32)
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return 0;
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buf_b64 = url_dec(buf_url, sz_url, &sz_b64);
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if (!buf_b64) {
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ctx->conn->enomem = 1;
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return 0;
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}
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buf_asn1 = base64_dec(buf_b64, sz_b64, &sz_asn1);
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if (!buf_asn1) {
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ctx->conn->enomem = 1;
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free(buf_b64);
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return 0;
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}
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ret = ssl_is_ocspreq(buf_asn1, sz_asn1);
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free(buf_asn1);
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free(buf_b64);
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return ret;
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}
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/*
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* Called after a request header was completely read.
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* If the request is an OCSP request, deny the request by sending an
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* OCSP response of type tryLater and close the connection to the server.
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*
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* Reference:
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* RFC 2560: X.509 Internet PKI Online Certificate Status Protocol (OCSP)
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*/
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static void NONNULL(1,2)
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protohttp_ocsp_deny(pxy_conn_ctx_t *ctx, protohttp_ctx_t *http_ctx)
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{
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struct evbuffer *inbuf, *outbuf;
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static const char ocspresp[] =
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"HTTP/1.0 200 OK\r\n"
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"Content-Type: application/ocsp-response\r\n"
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"Content-Length: 5\r\n"
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"Connection: close\r\n"
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"\r\n"
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"\x30\x03" /* OCSPResponse: SEQUENCE */
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"\x0a\x01" /* OCSPResponseStatus: ENUMERATED */
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"\x03"; /* tryLater (3) */
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if (!http_ctx->http_method)
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return;
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if (!strncasecmp(http_ctx->http_method, "GET", 3) &&
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protohttp_ocsp_is_valid_uri(http_ctx->http_uri, ctx))
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goto deny;
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if (!strncasecmp(http_ctx->http_method, "POST", 4) &&
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http_ctx->http_content_type &&
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!strncasecmp(http_ctx->http_content_type,
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"application/ocsp-request", 24))
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goto deny;
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return;
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deny:
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inbuf = bufferevent_get_input(ctx->src.bev);
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outbuf = bufferevent_get_output(ctx->src.bev);
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if (evbuffer_get_length(inbuf) > 0) {
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evbuffer_drain(inbuf, evbuffer_get_length(inbuf));
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}
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#ifdef DEBUG_PROXY
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log_dbg_level_printf(LOG_DBG_MODE_FINER, "protohttp_ocsp_deny: Closing dst, fd=%d, dst fd=%d\n", ctx->fd, bufferevent_getfd(ctx->dst.bev));
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#endif /* DEBUG_PROXY */
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ctx->protoctx->bufferevent_free_and_close_fd(ctx->dst.bev, ctx);
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ctx->dst.bev = NULL;
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ctx->dst.closed = 1;
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evbuffer_add_printf(outbuf, ocspresp);
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http_ctx->ocsp_denied = 1;
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}
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/*
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* Filter a single line of HTTP request headers.
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* Also fills in some context fields for logging.
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*
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* Returns NULL if the current line should be deleted from the request.
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* Returns a newly allocated string if the current line should be replaced.
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* Returns `line' if the line should be kept.
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*/
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static char * NONNULL(1,2,3)
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protohttp_filter_request_header_line(const char *line, pxy_conn_ctx_t *ctx, protohttp_ctx_t *http_ctx)
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{
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/* parse information for connect log */
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if (!http_ctx->http_method) {
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/* first line */
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char *space1, *space2;
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space1 = strchr(line, ' ');
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space2 = space1 ? strchr(space1 + 1, ' ') : NULL;
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if (!space1) {
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/* not HTTP */
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http_ctx->seen_req_header = 1;
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} else {
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http_ctx->http_method = malloc(space1 - line + 1);
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if (http_ctx->http_method) {
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memcpy(http_ctx->http_method, line, space1 - line);
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http_ctx->http_method[space1 - line] = '\0';
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} else {
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ctx->conn->enomem = 1;
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return NULL;
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}
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space1++;
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if (!space2) {
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/* HTTP/0.9 */
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http_ctx->seen_req_header = 1;
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space2 = space1 + strlen(space1);
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}
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http_ctx->http_uri = malloc(space2 - space1 + 1);
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if (http_ctx->http_uri) {
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memcpy(http_ctx->http_uri, space1, space2 - space1);
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http_ctx->http_uri[space2 - space1] = '\0';
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} else {
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ctx->conn->enomem = 1;
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return NULL;
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}
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}
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} else {
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/* not first line */
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char *newhdr;
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if (!http_ctx->http_host && !strncasecmp(line, "Host:", 5)) {
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http_ctx->http_host = strdup(util_skipws(line + 5));
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if (!http_ctx->http_host) {
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ctx->conn->enomem = 1;
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return NULL;
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}
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} else if (!strncasecmp(line, "Content-Type:", 13)) {
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http_ctx->http_content_type = strdup(util_skipws(line + 13));
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if (!http_ctx->http_content_type) {
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ctx->conn->enomem = 1;
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return NULL;
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}
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/* Override Connection: keepalive and Connection: upgrade */
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} else if (!strncasecmp(line, "Connection:", 11)) {
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http_ctx->sent_http_conn_close = 1;
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if (!(newhdr = strdup("Connection: close"))) {
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ctx->conn->enomem = 1;
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return NULL;
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}
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return newhdr;
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// @attention Always use conn ctx for opts, child ctx does not have opts, see the comments in pxy_conn_child_ctx
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} else if (ctx->conn->opts->remove_http_accept_encoding && !strncasecmp(line, "Accept-Encoding:", 16)) {
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return NULL;
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} else if (ctx->conn->opts->remove_http_referer && !strncasecmp(line, "Referer:", 8)) {
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return NULL;
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/* Suppress upgrading to SSL/TLS, WebSockets or HTTP/2,
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* unsupported encodings, and keep-alive */
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} else if (!strncasecmp(line, "Upgrade:", 8) ||
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!strncasecmp(line, "Accept-Encoding:", 16) ||
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!strncasecmp(line, "Keep-Alive:", 11)) {
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return NULL;
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} else if ((ctx->type == CONN_TYPE_CHILD) && (!strncasecmp(line, SSLPROXY_KEY, SSLPROXY_KEY_LEN) ||
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// @attention flickr keeps redirecting to https with 301 unless we remove the Via line of squid
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// Apparently flickr assumes the existence of Via header field or squid keyword a sign of plain http, even if we are using https
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!strncasecmp(line, "Via:", 4) ||
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// Also do not send the loopback address to the Internet
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!strncasecmp(line, "X-Forwarded-For:", 16))) {
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return NULL;
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} else if (line[0] == '\0') {
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http_ctx->seen_req_header = 1;
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if (!http_ctx->sent_http_conn_close) {
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newhdr = strdup("Connection: close\r\n");
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if (!newhdr) {
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ctx->conn->enomem = 1;
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return NULL;
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}
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return newhdr;
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}
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}
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}
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return (char*)line;
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}
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static void NONNULL(1,2,3,4)
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protohttp_filter_request_header(struct evbuffer *inbuf, struct evbuffer *outbuf, pxy_conn_ctx_t *ctx, protohttp_ctx_t *http_ctx)
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{
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char *line;
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while (!http_ctx->seen_req_header && (line = evbuffer_readln(inbuf, NULL, EVBUFFER_EOL_CRLF))) {
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char *replace = protohttp_filter_request_header_line(line, ctx, http_ctx);
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#ifdef DEBUG_PROXY
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log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_filter_request_header: line, fd=%d: %s\n", ctx->fd, line);
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#endif /* DEBUG_PROXY */
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if (replace == line) {
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evbuffer_add_printf(outbuf, "%s\r\n", line);
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} else if (replace) {
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#ifdef DEBUG_PROXY
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log_dbg_level_printf(LOG_DBG_MODE_FINER, "protohttp_filter_request_header: REPLACED line, fd=%d: %s\n", ctx->fd, replace);
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#endif /* DEBUG_PROXY */
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evbuffer_add_printf(outbuf, "%s\r\n", replace);
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free(replace);
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} else {
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#ifdef DEBUG_PROXY
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log_dbg_level_printf(LOG_DBG_MODE_FINER, "protohttp_filter_request_header: REMOVED line, fd=%d: %s\n", ctx->fd, line);
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#endif /* DEBUG_PROXY */
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}
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free(line);
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if ((ctx->type == CONN_TYPE_PARENT) && !ctx->sent_header) {
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ctx->sent_header = 1;
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#ifdef DEBUG_PROXY
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log_dbg_level_printf(LOG_DBG_MODE_FINER, "protohttp_filter_request_header: INSERT header_str line, fd=%d: %s\n", ctx->fd, ctx->conn->header_str);
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#endif /* DEBUG_PROXY */
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evbuffer_add_printf(outbuf, "%s\r\n", ctx->header_str);
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}
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}
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if (http_ctx->seen_req_header) {
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/* request header complete */
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if (ctx->conn->opts->deny_ocsp) {
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protohttp_ocsp_deny(ctx, http_ctx);
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}
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// @todo Fix this
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/* out of memory condition? */
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if (ctx->conn->enomem) {
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pxy_conn_free(ctx->conn, 1);
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return;
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}
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/* no data left after parsing headers? */
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if (evbuffer_get_length(inbuf) == 0) {
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return;
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}
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evbuffer_add_buffer(outbuf, inbuf);
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}
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}
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static void NONNULL(1)
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protohttp_bev_readcb_src(struct bufferevent *bev, void *arg)
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{
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pxy_conn_ctx_t *ctx = arg;
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#ifdef DEBUG_PROXY
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log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_src_exec: ENTER, fd=%d, size=%zu\n",
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ctx->fd, evbuffer_get_length(bufferevent_get_input(bev)));
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#endif /* DEBUG_PROXY */
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if (ctx->dst.closed) {
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pxy_discard_inbuf(bev);
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return;
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}
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protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
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struct evbuffer *inbuf = bufferevent_get_input(bev);
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struct evbuffer *outbuf = bufferevent_get_output(ctx->dst.bev);
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|
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// We insert our special header line to the first packet we get, e.g. right after the first \r\n in the case of http
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// @todo Should we look for GET/POST or Host header lines to detect the first packet?
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// But there is no guarantee that they will exist, due to fragmentation.
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// @attention We cannot append the ssl proxy address at the end of the packet or in between the header and the content,
|
|
// because (1) the packet may be just the first fragment split somewhere not appropriate for appending a header,
|
|
// and (2) there may not be any content.
|
|
// And we are dealing pop3 and smtp also, not just http.
|
|
|
|
/* request header munging */
|
|
if (!http_ctx->seen_req_header) {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_src_exec: HTTP Request Header size=%zu, fd=%d\n", evbuffer_get_length(inbuf), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
protohttp_filter_request_header(inbuf, outbuf, ctx, http_ctx);
|
|
} else {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_src_exec: HTTP Request Body size=%zu, fd=%d\n", evbuffer_get_length(inbuf), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
evbuffer_add_buffer(outbuf, inbuf);
|
|
}
|
|
pxy_try_set_watermark(bev, ctx, ctx->dst.bev);
|
|
}
|
|
|
|
/*
|
|
* Filter a single line of HTTP response headers.
|
|
*
|
|
* Returns NULL if the current line should be deleted from the response.
|
|
* Returns a newly allocated string if the current line should be replaced.
|
|
* Returns `line' if the line should be kept.
|
|
*/
|
|
static char * NONNULL(1,2,3)
|
|
protohttp_filter_response_header_line(const char *line, pxy_conn_ctx_t *ctx, protohttp_ctx_t *http_ctx)
|
|
{
|
|
/* parse information for connect log */
|
|
if (!http_ctx->http_status_code) {
|
|
/* first line */
|
|
char *space1, *space2;
|
|
|
|
space1 = strchr(line, ' ');
|
|
space2 = space1 ? strchr(space1 + 1, ' ') : NULL;
|
|
if (!space1 || !!strncmp(line, "HTTP", 4)) {
|
|
/* not HTTP or HTTP/0.9 */
|
|
http_ctx->seen_resp_header = 1;
|
|
} else {
|
|
size_t len_code, len_text;
|
|
|
|
if (space2) {
|
|
len_code = space2 - space1 - 1;
|
|
len_text = strlen(space2 + 1);
|
|
} else {
|
|
len_code = strlen(space1 + 1);
|
|
len_text = 0;
|
|
}
|
|
http_ctx->http_status_code = malloc(len_code + 1);
|
|
http_ctx->http_status_text = malloc(len_text + 1);
|
|
if (!http_ctx->http_status_code || !http_ctx->http_status_text) {
|
|
ctx->conn->enomem = 1;
|
|
return NULL;
|
|
}
|
|
memcpy(http_ctx->http_status_code, space1 + 1, len_code);
|
|
http_ctx->http_status_code[len_code] = '\0';
|
|
if (space2) {
|
|
memcpy(http_ctx->http_status_text,
|
|
space2 + 1, len_text);
|
|
}
|
|
http_ctx->http_status_text[len_text] = '\0';
|
|
}
|
|
} else {
|
|
/* not first line */
|
|
if (!http_ctx->http_content_length &&
|
|
!strncasecmp(line, "Content-Length:", 15)) {
|
|
http_ctx->http_content_length =
|
|
strdup(util_skipws(line + 15));
|
|
if (!http_ctx->http_content_length) {
|
|
ctx->conn->enomem = 1;
|
|
return NULL;
|
|
}
|
|
} else if (
|
|
/* HPKP: Public Key Pinning Extension for HTTP
|
|
* (draft-ietf-websec-key-pinning)
|
|
* remove to prevent public key pinning */
|
|
!strncasecmp(line, "Public-Key-Pins:", 16) ||
|
|
!strncasecmp(line, "Public-Key-Pins-Report-Only:", 28) ||
|
|
/* HSTS: HTTP Strict Transport Security (RFC 6797)
|
|
* remove to allow users to accept bad certs */
|
|
!strncasecmp(line, "Strict-Transport-Security:", 26) ||
|
|
/* Expect-CT: Expect Certificate Transparency
|
|
* (draft-ietf-httpbis-expect-ct-latest)
|
|
* remove to prevent failed CT log lookups */
|
|
!strncasecmp(line, "Expect-CT:", 10) ||
|
|
/* Alternate Protocol
|
|
* remove to prevent switching to QUIC, SPDY et al */
|
|
!strncasecmp(line, "Alternate-Protocol:", 19) ||
|
|
/* Upgrade header
|
|
* remove to prevent upgrading to HTTPS in unhandled ways,
|
|
* and more importantly, WebSockets and HTTP/2 */
|
|
!strncasecmp(line, "Upgrade:", 8)) {
|
|
return NULL;
|
|
} else if (line[0] == '\0') {
|
|
http_ctx->seen_resp_header = 1;
|
|
}
|
|
}
|
|
|
|
return (char*)line;
|
|
}
|
|
|
|
static void NONNULL(1,2,3,4)
|
|
protohttp_filter_response_header(struct evbuffer *inbuf, struct evbuffer *outbuf, pxy_conn_ctx_t *ctx, protohttp_ctx_t *http_ctx)
|
|
{
|
|
char *line;
|
|
|
|
while (!http_ctx->seen_resp_header && (line = evbuffer_readln(inbuf, NULL, EVBUFFER_EOL_CRLF))) {
|
|
char *replace = protohttp_filter_response_header_line(line, ctx, http_ctx);
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_filter_response_header: line, fd=%d: %s\n", ctx->fd, line);
|
|
#endif /* DEBUG_PROXY */
|
|
if (replace == line) {
|
|
evbuffer_add_printf(outbuf, "%s\r\n", line);
|
|
} else if (replace) {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protohttp_filter_response_header: REPLACED line, fd=%d: %s\n", ctx->fd, replace);
|
|
#endif /* DEBUG_PROXY */
|
|
evbuffer_add_printf(outbuf, "%s\r\n", replace);
|
|
free(replace);
|
|
} else {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protohttp_filter_response_header: REMOVED line, fd=%d: %s\n", ctx->fd, line);
|
|
#endif /* DEBUG_PROXY */
|
|
}
|
|
free(line);
|
|
}
|
|
|
|
if (http_ctx->seen_resp_header) {
|
|
// @todo Fix this
|
|
/* out of memory condition? */
|
|
if (ctx->conn->enomem) {
|
|
pxy_conn_free(ctx->conn, 0);
|
|
return;
|
|
}
|
|
|
|
/* no data left after parsing headers? */
|
|
if (evbuffer_get_length(inbuf) == 0) {
|
|
return;
|
|
}
|
|
evbuffer_add_buffer(outbuf, inbuf);
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_bev_readcb_dst(struct bufferevent *bev, void *arg)
|
|
{
|
|
pxy_conn_ctx_t *ctx = arg;
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_dst_exec: ENTER, fd=%d, size=%zu\n",
|
|
ctx->fd, evbuffer_get_length(bufferevent_get_input(bev)));
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
if (ctx->src.closed) {
|
|
pxy_discard_inbuf(bev);
|
|
return;
|
|
}
|
|
|
|
protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
|
|
struct evbuffer *inbuf = bufferevent_get_input(bev);
|
|
struct evbuffer *outbuf = bufferevent_get_output(ctx->src.bev);
|
|
|
|
if (!http_ctx->seen_resp_header) {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_dst_exec: HTTP Response Header size=%zu, fd=%d\n", evbuffer_get_length(inbuf), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
protohttp_filter_response_header(inbuf, outbuf, ctx, http_ctx);
|
|
} else {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_dst_exec: HTTP Response Body size=%zu, fd=%d\n", evbuffer_get_length(inbuf), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
evbuffer_add_buffer(outbuf, inbuf);
|
|
}
|
|
pxy_try_set_watermark(bev, ctx, ctx->src.bev);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_bev_readcb_srv_dst(UNUSED struct bufferevent *bev, UNUSED void *arg)
|
|
{
|
|
log_err_printf("protohttp_bev_readcb_srv_dst: readcb called on srv_dst\n");
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_bev_readcb_src_child(struct bufferevent *bev, void *arg)
|
|
{
|
|
pxy_conn_child_ctx_t *ctx = arg;
|
|
protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_src_child: ENTER, fd=%d, conn fd=%d, size=%zu\n",
|
|
ctx->fd, ctx->conn->fd, evbuffer_get_length(bufferevent_get_input(bev)));
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
if (ctx->dst.closed) {
|
|
pxy_discard_inbuf(bev);
|
|
return;
|
|
}
|
|
|
|
struct evbuffer *inbuf = bufferevent_get_input(bev);
|
|
struct evbuffer *outbuf = bufferevent_get_output(ctx->dst.bev);
|
|
|
|
if (!http_ctx->seen_req_header) {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_src_child: HTTP Request Header size=%zu, fd=%d\n", evbuffer_get_length(inbuf), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
// @todo Just remove SSLproxy line, do not filter response on the server side?
|
|
protohttp_filter_request_header(inbuf, outbuf, (pxy_conn_ctx_t *)ctx, http_ctx);
|
|
} else {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_src_child: HTTP Request Body size=%zu, fd=%d\n", evbuffer_get_length(inbuf), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
evbuffer_add_buffer(outbuf, inbuf);
|
|
}
|
|
pxy_try_set_watermark(bev, ctx->conn, ctx->dst.bev);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_bev_readcb_dst_child(struct bufferevent *bev, void *arg)
|
|
{
|
|
pxy_conn_child_ctx_t *ctx = arg;
|
|
protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_dst_child: ENTER, fd=%d, conn fd=%d, size=%zu\n",
|
|
ctx->fd, ctx->conn->fd, evbuffer_get_length(bufferevent_get_input(bev)));
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
if (ctx->src.closed) {
|
|
pxy_discard_inbuf(bev);
|
|
return;
|
|
}
|
|
|
|
struct evbuffer *inbuf = bufferevent_get_input(bev);
|
|
struct evbuffer *outbuf = bufferevent_get_output(ctx->src.bev);
|
|
|
|
if (!http_ctx->seen_resp_header) {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_dst_child: HTTP Response Header size=%zu, fd=%d\n", evbuffer_get_length(inbuf), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
// @todo Do not filter response on the server side?
|
|
protohttp_filter_response_header(inbuf, outbuf, (pxy_conn_ctx_t *)ctx, http_ctx);
|
|
} else {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protohttp_bev_readcb_dst_child: HTTP Response Body size=%zu, fd=%d\n", evbuffer_get_length(inbuf), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
evbuffer_add_buffer(outbuf, inbuf);
|
|
}
|
|
pxy_try_set_watermark(bev, ctx->conn, ctx->src.bev);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_bev_readcb(struct bufferevent *bev, void *arg)
|
|
{
|
|
pxy_conn_ctx_t *ctx = arg;
|
|
protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
|
|
|
|
int seen_resp_header_on_entry = http_ctx->seen_resp_header;
|
|
|
|
if (bev == ctx->src.bev) {
|
|
protohttp_bev_readcb_src(bev, arg);
|
|
} else if (bev == ctx->dst.bev) {
|
|
protohttp_bev_readcb_dst(bev, arg);
|
|
} else if (bev == ctx->srv_dst.bev) {
|
|
protohttp_bev_readcb_srv_dst(bev, arg);
|
|
} else {
|
|
log_err_printf("protohttp_bev_readcb: UNKWN conn end\n");
|
|
return;
|
|
}
|
|
|
|
if (!seen_resp_header_on_entry && http_ctx->seen_resp_header) {
|
|
/* response header complete: log connection */
|
|
if (WANT_CONNECT_LOG(ctx->conn) || ctx->opts->statslog) {
|
|
protohttp_log_connect(ctx);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_bev_readcb_child(struct bufferevent *bev, void *arg)
|
|
{
|
|
pxy_conn_child_ctx_t *ctx = arg;
|
|
|
|
if (bev == ctx->src.bev) {
|
|
protohttp_bev_readcb_src_child(bev, arg);
|
|
} else if (bev == ctx->dst.bev) {
|
|
protohttp_bev_readcb_dst_child(bev, arg);
|
|
} else {
|
|
log_err_printf("protohttp_bev_readcb_child: UNKWN conn end\n");
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_free_ctx(protohttp_ctx_t *http_ctx)
|
|
{
|
|
if (http_ctx->http_method) {
|
|
free(http_ctx->http_method);
|
|
}
|
|
if (http_ctx->http_uri) {
|
|
free(http_ctx->http_uri);
|
|
}
|
|
if (http_ctx->http_host) {
|
|
free(http_ctx->http_host);
|
|
}
|
|
if (http_ctx->http_content_type) {
|
|
free(http_ctx->http_content_type);
|
|
}
|
|
if (http_ctx->http_status_code) {
|
|
free(http_ctx->http_status_code);
|
|
}
|
|
if (http_ctx->http_status_text) {
|
|
free(http_ctx->http_status_text);
|
|
}
|
|
if (http_ctx->http_content_length) {
|
|
free(http_ctx->http_content_length);
|
|
}
|
|
free(http_ctx);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_free(pxy_conn_ctx_t *ctx)
|
|
{
|
|
protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
|
|
protohttp_free_ctx(http_ctx);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttps_free(pxy_conn_ctx_t *ctx)
|
|
{
|
|
protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
|
|
protohttp_free_ctx(http_ctx);
|
|
protossl_free(ctx);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protohttp_free_child(pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
protohttp_ctx_t *http_ctx = ctx->protoctx->arg;
|
|
protohttp_free_ctx(http_ctx);
|
|
}
|
|
|
|
protocol_t
|
|
protohttp_setup(pxy_conn_ctx_t *ctx)
|
|
{
|
|
ctx->protoctx->proto = PROTO_HTTP;
|
|
|
|
ctx->protoctx->bev_readcb = protohttp_bev_readcb;
|
|
ctx->protoctx->proto_free = protohttp_free;
|
|
|
|
ctx->protoctx->arg = malloc(sizeof(protohttp_ctx_t));
|
|
if (!ctx->protoctx->arg) {
|
|
free(ctx->protoctx);
|
|
return PROTO_ERROR;
|
|
}
|
|
memset(ctx->protoctx->arg, 0, sizeof(protohttp_ctx_t));
|
|
|
|
return PROTO_HTTP;
|
|
}
|
|
|
|
protocol_t
|
|
protohttps_setup(pxy_conn_ctx_t *ctx)
|
|
{
|
|
ctx->protoctx->proto = PROTO_HTTPS;
|
|
ctx->protoctx->connectcb = protossl_conn_connect;
|
|
ctx->protoctx->fd_readcb = protossl_fd_readcb;
|
|
|
|
ctx->protoctx->bev_readcb = protohttp_bev_readcb;
|
|
ctx->protoctx->bev_eventcb = protossl_bev_eventcb;
|
|
|
|
ctx->protoctx->bufferevent_free_and_close_fd = protossl_bufferevent_free_and_close_fd;
|
|
ctx->protoctx->proto_free = protohttps_free;
|
|
|
|
ctx->protoctx->arg = malloc(sizeof(protohttp_ctx_t));
|
|
if (!ctx->protoctx->arg) {
|
|
free(ctx->protoctx);
|
|
return PROTO_ERROR;
|
|
}
|
|
memset(ctx->protoctx->arg, 0, sizeof(protohttp_ctx_t));
|
|
|
|
ctx->sslctx = malloc(sizeof(ssl_ctx_t));
|
|
if (!ctx->sslctx) {
|
|
free(ctx->protoctx->arg);
|
|
free(ctx->protoctx);
|
|
return PROTO_ERROR;
|
|
}
|
|
memset(ctx->sslctx, 0, sizeof(ssl_ctx_t));
|
|
|
|
return PROTO_HTTPS;
|
|
}
|
|
|
|
protocol_t
|
|
protohttp_setup_child(pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
ctx->protoctx->proto = PROTO_HTTPS;
|
|
|
|
// @todo Should HTTP child conns do any http related processing, so use tcp defaults instead?
|
|
ctx->protoctx->bev_readcb = protohttp_bev_readcb_child;
|
|
ctx->protoctx->proto_free = protohttp_free_child;
|
|
|
|
ctx->protoctx->arg = malloc(sizeof(protohttp_ctx_t));
|
|
if (!ctx->protoctx->arg) {
|
|
free(ctx->protoctx);
|
|
return PROTO_ERROR;
|
|
}
|
|
memset(ctx->protoctx->arg, 0, sizeof(protohttp_ctx_t));
|
|
|
|
return PROTO_HTTPS;
|
|
}
|
|
|
|
protocol_t
|
|
protohttps_setup_child(pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
ctx->protoctx->proto = PROTO_HTTPS;
|
|
ctx->protoctx->connectcb = protossl_connect_child;
|
|
|
|
ctx->protoctx->bev_readcb = protohttp_bev_readcb_child;
|
|
ctx->protoctx->bev_eventcb = protossl_bev_eventcb_child;
|
|
|
|
ctx->protoctx->bufferevent_free_and_close_fd = protossl_bufferevent_free_and_close_fd;
|
|
ctx->protoctx->proto_free = protohttp_free_child;
|
|
|
|
ctx->protoctx->arg = malloc(sizeof(protohttp_ctx_t));
|
|
if (!ctx->protoctx->arg) {
|
|
free(ctx->protoctx);
|
|
return PROTO_ERROR;
|
|
}
|
|
memset(ctx->protoctx->arg, 0, sizeof(protohttp_ctx_t));
|
|
|
|
return PROTO_HTTPS;
|
|
}
|
|
|
|
/* vim: set noet ft=c: */
|