212 lines
6.1 KiB
C
212 lines
6.1 KiB
C
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2020 Olof Hagsand
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Copyright (C) 2020 Olof Hagsand and Rubicon Communications, LLC(Netgate)
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This file is part of CLIXON.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 3 or later (the "GPL"),
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in which case the provisions of the GPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of the GPL, and not to allow others to
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use your version of this file under the terms of Apache License version 2,
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indicate your decision by deleting the provisions above and replace them with
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the notice and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the Apache License version 2 or the GPL.
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***** END LICENSE BLOCK *****
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* Concrete functions for libevhtp of the
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* Virtual clixon restconf API functions.
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* @see restconf_api.h for virtual API
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <signal.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <time.h>
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#include <signal.h>
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#include <dlfcn.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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/* evhtp */
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#include <evhtp/evhtp.h>
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#include <evhtp/sslutils.h>
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/* cligen */
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#include <cligen/cligen.h>
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/* clicon */
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#include <clixon/clixon.h>
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#include "restconf_lib.h"
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#include "restconf_api.h" /* Virtual api */
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/*! Add HTTP header field name and value to reply, evhtp specific
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* @param[in] req Evhtp http request handle
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* @param[in] name HTTP header field name
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* @param[in] vfmt HTTP header field value format string w variable parameter
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* @see eg RFC 7230
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*/
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int
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restconf_reply_header(void *req0,
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const char *name,
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const char *vfmt,
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...)
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{
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evhtp_request_t *req = (evhtp_request_t *)req0;
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int retval = -1;
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size_t vlen;
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char *value = NULL;
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va_list ap;
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evhtp_header_t *evhdr;
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if (req == NULL || name == NULL || vfmt == NULL){
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clicon_err(OE_CFG, EINVAL, "req, name or value is NULL");
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return -1;
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}
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va_start(ap, vfmt);
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vlen = vsnprintf(NULL, 0, vfmt, ap);
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va_end(ap);
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/* allocate value string exactly fitting */
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if ((value = malloc(vlen+1)) == NULL){
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clicon_err(OE_UNIX, errno, "malloc");
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goto done;
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}
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/* second round: compute actual value */
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va_start(ap, vfmt);
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if (vsnprintf(value, vlen+1, vfmt, ap) < 0){
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clicon_err(OE_UNIX, errno, "vsnprintf");
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va_end(ap);
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goto done;
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}
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va_end(ap);
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if ((evhdr = evhtp_header_new(name, value, 0, 1)) == NULL){ /* 1: free after use */
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clicon_err(OE_CFG, errno, "evhttp_header_new");
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goto done;
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}
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value = NULL; /* freed by evhtp */
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evhtp_headers_add_header(req->headers_out, evhdr);
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retval = 0;
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done:
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if (value)
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free(value);
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return retval;
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}
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/*! Send HTTP reply with potential message body
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* @param[in] req Evhtp http request handle
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* @param[in] cb Body as a cbuf, send if
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*
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* Prerequisites: status code set, headers given, body if wanted set
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*/
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int
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restconf_reply_send(void *req0,
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int code,
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cbuf *cb)
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{
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evhtp_request_t *req = (evhtp_request_t *)req0;
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int retval = -1;
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struct evbuffer *eb = NULL;
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const char *reason_phrase;
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req->status = code;
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if ((reason_phrase = restconf_code2reason(code)) == NULL)
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reason_phrase="";
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#if 0 /* XXX remove status header för evhtp? */
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if (restconf_reply_header(req, "Status", "%d %s", code, reason_phrase) < 0)
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goto done;
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#endif
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#if 0 /* Optional? */
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{
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evhtp_connection_t *conn;
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if ((conn = evhtp_request_get_connection(req)) == NULL){
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clicon_err(OE_DAEMON, EFAULT, "evhtp_request_get_connection");
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goto done;
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}
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htp_sslutil_add_xheaders(req->headers_out, conn->ssl, HTP_SSLUTILS_XHDR_ALL);
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}
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#endif
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/* If body, add a content-length header */
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if (cb != NULL && cbuf_len(cb))
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if (restconf_reply_header(req, "Content-Length", "%d", cbuf_len(cb)) < 0)
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goto done;
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/* create evbuffer* : bufferevent_write_buffer/ drain,
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ie send everything , except body */
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evhtp_send_reply_start(req, req->status);
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/* Write a body if cbuf is nonzero */
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if (cb != NULL && cbuf_len(cb)){
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/* Suboptimal, copy from cbuf to evbuffer */
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if ((eb = evbuffer_new()) == NULL){
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clicon_err(OE_CFG, errno, "evbuffer_new");
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goto done;
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}
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if (evbuffer_add(eb, cbuf_get(cb), cbuf_len(cb)) < 0){
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clicon_err(OE_CFG, errno, "evbuffer_add");
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goto done;
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}
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evhtp_send_reply_body(req, eb); /* conn->bev = eb, body is different */
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}
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evhtp_send_reply_end(req); /* just flag finished */
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retval = 0;
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done:
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if (eb)
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evhtp_safe_free(eb, evbuffer_free);
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return retval;
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}
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/*! get input data
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* @param[in] req Fastcgi request handle
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* @note Pulls up an event buffer and then copies it to a cbuf. This is not efficient.
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*/
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cbuf *
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restconf_get_indata(void *req0)
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{
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evhtp_request_t *req = (evhtp_request_t *)req0;
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cbuf *cb = NULL;
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size_t len;
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unsigned char *buf;
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if ((cb = cbuf_new()) == NULL)
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return NULL;
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len = evbuffer_get_length(req->buffer_in);
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if (len > 0){
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if ((buf = evbuffer_pullup(req->buffer_in, len)) == NULL){
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clicon_err(OE_CFG, errno, "evbuffer_pullup");
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return NULL;
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}
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/* Note the pullup may not be null-terminated */
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cbuf_append_buf(cb, buf, len);
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}
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return cb;
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}
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