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Fixed some bugx, pulled in code from other files. 

FossilOrigin-Name: ee339494cc66985f8b16a60fc2d1d29861e8fedc588ca2ab9c4a82af47338d79
This commit is contained in:
7u83@mail.ru 2015-04-06 07:17:13 +00:00
parent c0985357a1
commit 6e1224868d
1 changed files with 126 additions and 18 deletions
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144
src/capwap/cw_process_msg.c
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@ -1,3 +1,25 @@
/*
This file is part of libcapwap.
libcapwap 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 3 of the License, or
(at your option) any later version.
libcapwap 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.
You should have received a copy of the GNU General Public License
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file
* @brief Processing of incomming messaages.
*/
#include <stdint.h>
#include <stdio.h>
@ -12,26 +34,69 @@
#include "dbg.h"
//int cw_out_msg(struct conn *conn, uint8_t * rawout);
int conn_send_msg(struct conn *conn, uint8_t * rawmsg);
/**
* Init response message header
*/
void cw_init_response(struct conn * conn, uint8_t *req)
{
uint8_t *buffer=conn->resp_buffer;
int shbytes = cw_get_hdr_msg_offset(req);
int dhbytes;
memcpy(buffer,req,shbytes);
cw_set_hdr_hlen(buffer,2);
cw_set_hdr_flags(buffer,CW_FLAG_HDR_M,1);
dhbytes = cw_get_hdr_msg_offset(buffer);
uint8_t * msgptr = req+shbytes;
uint8_t * dmsgptr = buffer+dhbytes;
cw_set_msg_type(dmsgptr,cw_get_msg_type(msgptr)+1);
cw_set_msg_seqnum(dmsgptr,cw_get_msg_seqnum(msgptr));
cw_set_msg_flags(dmsgptr,0);
}
/**
* send a response
*/
int cw_send_response(struct conn *conn, uint8_t * rawmsg, int len)
{
// struct priv priv;
cw_init_response(conn, rawmsg);
// uint8_t *msgptr = rawmsg + cw_get_hdr_msg_offset(rawmsg);
// cw_action_out_t as;
cw_put_msg(conn,conn->resp_buffer);
conn_send_msg(conn, conn->resp_buffer);
return 1;
}
/**
* Special case error message, which is sent when an unexpected messages
* was received or somethin else happened.
* @param conn conection
* @param rawmsg the received request message, which the response belongs to
* @pqram result_code result code to send
* @return 1
*/
int cw_send_error_response(struct conn *conn,uint8_t *rawmsg, uint32_t result_code)
{
cw_init_response(conn,rawmsg);
uint8_t *out = conn->resp_buffer;
uint8_t *dst = cw_get_hdr_msg_elems_ptr(out);
int l = cw_put_elem_result_code(dst,result_code);
cw_set_msg_elems_len(out+cw_get_hdr_msg_offset(out), l);
conn_send_msg(conn, conn->resp_buffer);
return 1;
}
@ -72,17 +137,39 @@ int cw_process_msg(struct conn *conn, uint8_t * rawmsg, int len)
as.capwap_state = conn->capwap_state;
as.msg_id = cw_get_msg_id(msg_ptr);
as.vendor_id = 0;
as.elem_id = -1;
as.elem_id = 0;
as.proto=0;
/* Search for state/message combination */
afm = cw_actionlist_in_get(conn->actions->in, &as);
/* Check if message comes in right state */
if (!afm) {
cw_dbg(DBG_MSG_ERR, "Message type %d (%s) not allowed in %s State.",
as.msg_id, cw_strmsg(as.msg_id), cw_strstate(as.capwap_state));
/* Throw away unexpected response messages */
if (!(as.msg_id &1)) {
cw_dbg(DBG_MSG_ERR, "Message type %d (%s) unexpected, discarding.",
as.msg_id, cw_strmsg(as.msg_id));
return 0;
}
/* Request message not found in current state, check if we know
anything else about this message type */
const char *str = cw_strheap_get(conn->actions->strmsg,as.msg_id);
int result_code=0;
if (str) {
/* Message found, but it was in wrong state */
cw_dbg(DBG_MSG_ERR, "Message type %d (%s) not allowed in %s State.",
as.msg_id, cw_strmsg(as.msg_id), cw_strstate(as.capwap_state));
result_code = CW_RESULT_MSG_INVALID_IN_CURRENT_STATE;
}
else {
/* Message is unknown */
cw_dbg(DBG_MSG_ERR, "Message type %d (%s) unknown.",
as.msg_id, cw_strmsg(as.msg_id), cw_strstate(as.capwap_state));
result_code = CW_RESULT_MSG_UNRECOGNIZED;
}
cw_send_error_response(conn,rawmsg,result_code);
return 0;
}
@ -95,6 +182,9 @@ int cw_process_msg(struct conn *conn, uint8_t * rawmsg, int len)
uint8_t *elems_ptr = cw_get_msg_elems_ptr(msg_ptr);
uint8_t *elem;
conn->mand = intavltree_create();
/* iterate through message elements */
cw_foreach_elem(elem, elems_ptr, elems_len) {
as.elem_id = cw_get_elem_id(elem);
@ -110,6 +200,12 @@ int cw_process_msg(struct conn *conn, uint8_t * rawmsg, int len)
as.elem_id, as.msg_id, cw_strmsg(as.msg_id));
continue;
}
if (af->mand){
/* add found mandatory message element
to mand list */
intavltree_add(conn->mand,af->item_id);
}
if (af->start) {
af->start(conn, af, cw_get_elem_data(elem), elem_len);
@ -117,13 +213,25 @@ int cw_process_msg(struct conn *conn, uint8_t * rawmsg, int len)
}
cw_send_response(conn, rawmsg, len);
int result_code=0;
if (afm->end) {
afm->end(conn, afm, rawmsg, len);
result_code=afm->end(conn, afm, rawmsg, len);
}
/* if we've got a request message, we have to send a response message */
if (as.msg_id & 1) {
if ( result_code>0 ) {
/* the end method gave us an result code, so
send an error message */
cw_send_error_response(conn,rawmsg,result_code);
}
else{
/* regular response message */
cw_send_response(conn, rawmsg, len);
}
}
intavltree_destroy(conn->mand);
return 0;