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/*
* Copyright (C) 2013 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#define _GNU_SOURCE /* for asprintf() */
#include "tnc_ifmap_http.h"
#include <utils/debug.h>
#include <utils/lexparser.h>
#include <stdio.h>
typedef struct private_tnc_ifmap_http_t private_tnc_ifmap_http_t;
/**
* Private data of an tnc_ifmap_http_t object.
*/
struct private_tnc_ifmap_http_t {
/**
* Public tnc_ifmap_http_t interface.
*/
tnc_ifmap_http_t public;
/**
* HTTPS Server URI with https:// prefix removed
*/
char *uri;
/**
* Optional base64-encoded username:password for HTTP Basic Authentication
*/
chunk_t user_pass;
/**
* HTTP chunked mode
*/
bool chunked;
};
METHOD(tnc_ifmap_http_t, build, status_t,
private_tnc_ifmap_http_t *this, chunk_t *in, chunk_t *out)
{
char *host, *path, *request, auth[128];
int len;
/* Duplicate host[/path] string since we are going to manipulate it */
len = strlen(this->uri) + 2;
host = malloc(len);
memset(host, '\0', len);
strcpy(host, this->uri);
/* Extract appended path or set to root */
path = strchr(host, '/');
if (!path)
{
path = host + len - 2;
*path = '/';
}
/* Use Basic Authentication? */
if (this->user_pass.len)
{
snprintf(auth, sizeof(auth), "Authorization: Basic %.*s\r\n",
this->user_pass.len, this->user_pass.ptr);
}
else
{
*auth = '\0';
}
/* Write HTTP POST request, TODO break up into chunks */
len = asprintf(&request,
"POST %s HTTP/1.1\r\n"
"Host: %.*s\r\n"
"%s"
"Content-Type: application/soap+xml;charset=utf-8\r\n"
"Content-Length: %d\r\n"
"\r\n"
"%.*s", path, (path-host), host, auth, in->len, in->len, in->ptr);
free(host);
if (len == -1)
{
return FAILED;
}
*out = chunk_create(request, len);
DBG3(DBG_TLS, "sending HTTP POST request %B", out);
return SUCCESS;
}
static bool process_header(chunk_t *in, bool *chunked, u_int *content_len)
{
chunk_t line, version, parameter;
int code;
u_int len;
/* Process HTTP protocol version */
if (!fetchline(in, &line) || !extract_token(&version, ' ', &line) ||
!match("HTTP/1.1", &version) || sscanf(line.ptr, "%d", &code) != 1)
{
DBG1(DBG_TNC, "malformed http response header");
return FALSE;
}
if (code != 200)
{
DBG1(DBG_TNC, "http response returns error code %d", code);
return FALSE;
}
*content_len = 0;
*chunked = FALSE;
/* Process HTTP header line by line until the HTTP body is reached */
while (fetchline(in, &line))
{
if (line.len == 0)
{
break;
}
if (extract_token(¶meter, ':', &line) && eat_whitespace(&line))
{
if (match("Content-Length", ¶meter))
{
if (sscanf(line.ptr, "%u", &len) == 1)
{
*content_len = len;
}
}
else if (match("Transfer-Encoding", ¶meter) &&
match("chunked", &line))
{
*chunked = TRUE;
}
}
}
return TRUE;
}
METHOD(tnc_ifmap_http_t, process, status_t,
private_tnc_ifmap_http_t *this, chunk_t *in, chunk_t *out)
{
u_int len = 0;
chunk_t line, out_chunk;
DBG3(DBG_TLS, "receiving HTTP response %B", in);
if (!this->chunked)
{
if (!process_header(in, &this->chunked, &len))
{
return FAILED;
}
}
while (in->len)
{
if (this->chunked)
{
if (!fetchline(in, &line) || sscanf(line.ptr, "%x", &len) != 1)
{
return FAILED;
}
DBG3(DBG_TLS, "received HTTP response is chunked (%u bytes)", len);
/* Received last chunk? */
if (len == 0)
{
return SUCCESS;
}
}
/* Check size of of remaining HTTP body */
if (len > in->len)
{
DBG1(DBG_TNC, "insufficient data in HTTP body");
return FAILED;
}
if (this->chunked)
{
out_chunk = *in;
out_chunk.len = len;
*out = chunk_cat("mc", *out, out_chunk);
*in = chunk_skip(*in, len);
if (!fetchline(in, &line) || line.len > 0)
{
return FAILED;
}
}
else
{
if (len)
{
in->len = len;
}
*out = chunk_clone(*in);
return SUCCESS;
}
}
return NEED_MORE;
}
METHOD(tnc_ifmap_http_t, destroy, void,
private_tnc_ifmap_http_t *this)
{
free(this);
}
/**
* See header
*/
tnc_ifmap_http_t *tnc_ifmap_http_create(char *uri, chunk_t user_pass)
{
private_tnc_ifmap_http_t *this;
INIT(this,
.public = {
.build = _build,
.process = _process,
.destroy = _destroy,
},
.uri = uri,
.user_pass = user_pass,
);
return &this->public;
}
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