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/*-
* Copyright 2016 Vsevolod Stakhov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "rspamdclient.h"
#include "libutil/util.h"
#include "libutil/http.h"
#include "libutil/http_private.h"
#include "unix-std.h"
#include "contrib/zstd/zstd.h"
#include "contrib/zstd/zdict.h"
#ifdef HAVE_FETCH_H
#include <fetch.h>
#elif defined(CURL_FOUND)
#include <curl/curl.h>
#endif
struct rspamd_client_request;
/*
* Since rspamd uses untagged HTTP we can pass a single message per socket
*/
struct rspamd_client_connection {
gint fd;
GString *server_name;
struct rspamd_cryptobox_pubkey *key;
struct rspamd_cryptobox_keypair *keypair;
struct event_base *ev_base;
struct timeval timeout;
struct rspamd_http_connection *http_conn;
gboolean req_sent;
gdouble start_time;
gdouble send_time;
struct rspamd_client_request *req;
struct rspamd_keypair_cache *keys_cache;
};
struct rspamd_client_request {
struct rspamd_client_connection *conn;
struct rspamd_http_message *msg;
GString *input;
rspamd_client_callback cb;
gpointer ud;
};
#define RCLIENT_ERROR rspamd_client_error_quark ()
GQuark
rspamd_client_error_quark (void)
{
return g_quark_from_static_string ("rspamd-client-error");
}
static void
rspamd_client_request_free (struct rspamd_client_request *req)
{
if (req != NULL) {
if (req->conn) {
req->conn->req = NULL;
}
if (req->input) {
g_string_free (req->input, TRUE);
}
g_free (req);
}
}
static gint
rspamd_client_body_handler (struct rspamd_http_connection *conn,
struct rspamd_http_message *msg,
const gchar *chunk, gsize len)
{
/* Do nothing here */
return 0;
}
static void
rspamd_client_error_handler (struct rspamd_http_connection *conn, GError *err)
{
struct rspamd_client_request *req =
(struct rspamd_client_request *)conn->ud;
struct rspamd_client_connection *c;
c = req->conn;
req->cb (c, NULL, c->server_name->str, NULL,
req->input, req->ud,
c->start_time, c->send_time, err);
}
static gint
rspamd_client_finish_handler (struct rspamd_http_connection *conn,
struct rspamd_http_message *msg)
{
struct rspamd_client_request *req =
(struct rspamd_client_request *)conn->ud;
struct rspamd_client_connection *c;
struct ucl_parser *parser;
GError *err;
const rspamd_ftok_t *tok;
c = req->conn;
if (!c->req_sent) {
c->req_sent = TRUE;
c->send_time = rspamd_get_ticks (FALSE);
rspamd_http_connection_reset (c->http_conn);
rspamd_http_connection_read_message (c->http_conn,
c->req,
c->fd,
&c->timeout,
c->ev_base);
return 0;
}
else {
if (rspamd_http_message_get_body (msg, NULL) == NULL || msg->code != 200) {
err = g_error_new (RCLIENT_ERROR, msg->code, "HTTP error: %d, %.*s",
msg->code,
(gint)msg->status->len, msg->status->str);
req->cb (c, msg, c->server_name->str, NULL, req->input, req->ud,
c->start_time, c->send_time, err);
g_error_free (err);
return 0;
}
tok = rspamd_http_message_find_header (msg, "compression");
if (tok) {
/* Need to uncompress */
rspamd_ftok_t t;
t.begin = "zstd";
t.len = 4;
if (rspamd_ftok_casecmp (tok, &t) == 0) {
ZSTD_DStream *zstream;
ZSTD_inBuffer zin;
ZSTD_outBuffer zout;
guchar *out;
gsize outlen, r;
zstream = ZSTD_createDStream ();
ZSTD_initDStream (zstream);
zin.pos = 0;
zin.src = msg->body_buf.begin;
zin.size = msg->body_buf.len;
if ((outlen = ZSTD_getDecompressedSize (zin.src, zin.size)) == 0) {
outlen = ZSTD_DStreamOutSize ();
}
out = g_malloc (outlen);
zout.dst = out;
zout.pos = 0;
zout.size = outlen;
while (zin.pos < zin.size) {
r = ZSTD_decompressStream (zstream, &zout, &zin);
if (ZSTD_isError (r)) {
err = g_error_new (RCLIENT_ERROR, 500,
"Decompression error: %s",
ZSTD_getErrorName (r));
req->cb (c, msg, c->server_name->str, NULL,
req->input, req->ud, c->start_time,
c->send_time, err);
g_error_free (err);
ZSTD_freeDStream (zstream);
g_free (out);
return 0;
}
if (zout.pos == zout.size) {
/* We need to extend output buffer */
zout.size = zout.size * 1.5 + 1.0;
zout.dst = g_realloc (zout.dst, zout.size);
}
}
ZSTD_freeDStream (zstream);
parser = ucl_parser_new (0);
if (!ucl_parser_add_chunk (parser, zout.dst, zout.pos)) {
err = g_error_new (RCLIENT_ERROR, msg->code, "Cannot parse UCL: %s",
ucl_parser_get_error (parser));
ucl_parser_free (parser);
req->cb (c, msg, c->server_name->str, NULL, req->input,
req->ud, c->start_time, c->send_time, err);
g_error_free (err);
g_free (zout.dst);
return 0;
}
g_free (zout.dst);
}
else {
err = g_error_new (RCLIENT_ERROR, 500,
"Invalid compression method");
req->cb (c, msg, c->server_name->str, NULL,
req->input, req->ud, c->start_time, c->send_time, err);
g_error_free (err);
return 0;
}
}
else {
parser = ucl_parser_new (0);
if (!ucl_parser_add_chunk (parser, msg->body_buf.begin, msg->body_buf.len)) {
err = g_error_new (RCLIENT_ERROR, msg->code, "Cannot parse UCL: %s",
ucl_parser_get_error (parser));
ucl_parser_free (parser);
req->cb (c, msg, c->server_name->str, NULL,
req->input, req->ud, c->start_time, c->send_time, err);
g_error_free (err);
return 0;
}
}
req->cb (c, msg, c->server_name->str, ucl_parser_get_object (
parser), req->input, req->ud, c->start_time, c->send_time, NULL);
ucl_parser_free (parser);
}
return 0;
}
struct rspamd_client_connection *
rspamd_client_init (struct event_base *ev_base, const gchar *name,
guint16 port, gdouble timeout, const gchar *key)
{
struct rspamd_client_connection *conn;
gint fd;
fd = rspamd_socket (name, port, SOCK_STREAM, TRUE, FALSE, TRUE);
if (fd == -1) {
return NULL;
}
conn = g_malloc0 (sizeof (struct rspamd_client_connection));
conn->ev_base = ev_base;
conn->fd = fd;
conn->req_sent = FALSE;
conn->keys_cache = rspamd_keypair_cache_new (32);
conn->http_conn = rspamd_http_connection_new (rspamd_client_body_handler,
rspamd_client_error_handler,
rspamd_client_finish_handler,
0,
RSPAMD_HTTP_CLIENT,
conn->keys_cache,
NULL);
conn->server_name = g_string_new (name);
if (port != 0) {
rspamd_printf_gstring (conn->server_name, ":%d", (int)port);
}
double_to_tv (timeout, &conn->timeout);
if (key) {
conn->key = rspamd_pubkey_from_base32 (key, 0, RSPAMD_KEYPAIR_KEX,
RSPAMD_CRYPTOBOX_MODE_25519);
if (conn->key) {
conn->keypair = rspamd_keypair_new (RSPAMD_KEYPAIR_KEX,
RSPAMD_CRYPTOBOX_MODE_25519);
rspamd_http_connection_set_key (conn->http_conn, conn->keypair);
}
else {
rspamd_client_destroy (conn);
return NULL;
}
}
return conn;
}
gboolean
rspamd_client_command (struct rspamd_client_connection *conn,
const gchar *command, GQueue *attrs,
FILE *in, rspamd_client_callback cb,
gpointer ud, gboolean compressed,
const gchar *comp_dictionary,
const gchar *filename,
GError **err)
{
struct rspamd_client_request *req;
struct rspamd_http_client_header *nh;
gchar *p;
gsize remain, old_len;
GList *cur;
GString *input = NULL;
rspamd_fstring_t *body;
guint dict_id = 0;
gsize dict_len = 0;
void *dict = NULL;
ZSTD_CCtx *zctx;
req = g_malloc0 (sizeof (struct rspamd_client_request));
req->conn = conn;
req->cb = cb;
req->ud = ud;
req->msg = rspamd_http_new_message (HTTP_REQUEST);
if (conn->key) {
req->msg->peer_key = rspamd_pubkey_ref (conn->key);
}
if (in != NULL) {
/* Read input stream */
input = g_string_sized_new (BUFSIZ);
while (!feof (in)) {
p = input->str + input->len;
remain = input->allocated_len - input->len - 1;
if (remain == 0) {
old_len = input->len;
g_string_set_size (input, old_len * 2);
input->len = old_len;
continue;
}
remain = fread (p, 1, remain, in);
if (remain > 0) {
input->len += remain;
input->str[input->len] = '\0';
}
}
if (ferror (in) != 0) {
g_set_error (err, RCLIENT_ERROR, ferror (
in), "input IO error: %s", strerror (ferror (in)));
g_free (req);
g_string_free (input, TRUE);
return FALSE;
}
if (!compressed) {
body = rspamd_fstring_new_init (input->str, input->len);
}
else {
if (comp_dictionary) {
dict = rspamd_file_xmap (comp_dictionary, PROT_READ, &dict_len,
TRUE);
if (dict == NULL) {
g_set_error (err, RCLIENT_ERROR, errno,
"cannot open dictionary %s: %s",
comp_dictionary,
strerror (errno));
g_free (req);
g_string_free (input, TRUE);
return FALSE;
}
dict_id = ZDICT_getDictID (comp_dictionary, dict_len);
if (dict_id == 0) {
g_set_error (err, RCLIENT_ERROR, errno,
"cannot open dictionary %s: %s",
comp_dictionary,
strerror (errno));
g_free (req);
g_string_free (input, TRUE);
munmap (dict, dict_len);
return FALSE;
}
}
body = rspamd_fstring_sized_new (ZSTD_compressBound (input->len));
zctx = ZSTD_createCCtx ();
body->len = ZSTD_compress_usingDict (zctx, body->str, body->allocated,
input->str, input->len,
dict, dict_len,
1);
munmap (dict, dict_len);
if (ZSTD_isError (body->len)) {
g_set_error (err, RCLIENT_ERROR, ferror (
in), "compression error");
g_free (req);
g_string_free (input, TRUE);
rspamd_fstring_free (body);
ZSTD_freeCCtx (zctx);
return FALSE;
}
ZSTD_freeCCtx (zctx);
}
rspamd_http_message_set_body_from_fstring_steal (req->msg, body);
req->input = input;
}
else {
req->input = NULL;
}
/* Convert headers */
cur = attrs->head;
while (cur != NULL) {
nh = cur->data;
rspamd_http_message_add_header (req->msg, nh->name, nh->value);
cur = g_list_next (cur);
}
if (compressed) {
rspamd_http_message_add_header (req->msg, "Compression", "zstd");
if (dict_id != 0) {
gchar dict_str[32];
rspamd_snprintf (dict_str, sizeof (dict_str), "%ud", dict_id);
rspamd_http_message_add_header (req->msg, "Dictionary", dict_str);
}
}
if (filename) {
rspamd_http_message_add_header (req->msg, "Filename", filename);
}
req->msg->url = rspamd_fstring_append (req->msg->url, "/", 1);
req->msg->url = rspamd_fstring_append (req->msg->url, command, strlen (command));
conn->req = req;
conn->start_time = rspamd_get_ticks (FALSE);
if (compressed) {
rspamd_http_connection_write_message (conn->http_conn, req->msg, NULL,
"application/x-compressed", req, conn->fd,
&conn->timeout, conn->ev_base);
}
else {
rspamd_http_connection_write_message (conn->http_conn, req->msg, NULL,
"text/plain", req, conn->fd, &conn->timeout, conn->ev_base);
}
return TRUE;
}
void
rspamd_client_destroy (struct rspamd_client_connection *conn)
{
if (conn != NULL) {
rspamd_http_connection_unref (conn->http_conn);
if (conn->req != NULL) {
rspamd_client_request_free (conn->req);
}
close (conn->fd);
if (conn->key) {
rspamd_pubkey_unref (conn->key);
}
if (conn->keypair) {
rspamd_keypair_unref (conn->keypair);
}
g_string_free (conn->server_name, TRUE);
g_free (conn);
}
}
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