Added missing message.c

shell
7u83 6 months ago
parent b574aac31f
commit 5dcfaba7ee
  1. 320
      src/cw/message.c

@ -0,0 +1,320 @@
#include "cw.h"
#include "log.h"
#include "dbg.h"
int cw_encode_elements(struct cw_ElemHandlerParams *params, mlist_t elements_list, uint8_t * dst)
{
int len;
struct mlistelem * elem;
len =0;
mlist_foreach(elem,elements_list){
int l;
struct cw_ElemData * data;
struct cw_ElemHandler * handler;
data = mlistelem_dataptr(elem);
handler = cw_msgset_get_elemhandler(params->msgset,data->proto,data->vendor,data->id);
params->elemdata = data;
cw_dbg(DBG_MSG_ASSEMBLY," Add Elem: %d %d %d %s", data->proto, data->vendor, data->id, handler->name);
if (handler==NULL){
cw_log(LOG_ERR,"Can't put message element %d %d %d, no handler defined.",
data->proto,data->vendor,data->id);
continue;
}
if (handler->put == NULL){
if (data->mand){
cw_log(LOG_ERR,"Error: Can't add mandatory message element %d - %s, no put method defined",
handler->id, handler->name);
}
continue;
}
if (!data->mand){
if (!cw_cfg_base_exists(params->cfg_list[0],handler->key)){
// cw_dbg(DBG_X,"nothing todo");
continue;
}
}
l = handler->put(handler,params,dst+len);
/* if(l>0)
cw_dbg_elem(DBG_ELEM_OUT,conn,type,handler,dst+len,l);
* if (strlen(details)){
cw_dbg(DBG_ELEM_DETAIL," %s",params.debug_details);
}
*/ len += l;
}
return len;
}
/**
* Put a message to a buffer
* This functions assumes, that a message header is
* alread initialized in buffer
* Message alements are taken fom actiondef in #conn->action
*/
int cw_compose_message(struct cw_Conn *conn, uint8_t * rawout)
{
char details[1024];
uint8_t *msgptr,*dst;
int type;
struct cw_MsgData * msg;
int len;
struct cw_ElemHandlerParams params;
/* rawout is already initialized, so we can get
* msg type from buffer */
msgptr = rawout + cw_get_hdr_msg_offset(rawout);
type = cw_get_msg_type(msgptr);
/* look for message data */
msg = cw_msgset_get_msgdata(conn->msgset,type);
if (msg == NULL){
cw_log(LOG_ERR,"Error: Can't create message of type %d (%s) - no definition found.",
type, cw_strmsg(type));
return CAPWAP_RESULT_MSG_UNRECOGNIZED;
}
if (msg->preprocess){
msg->preprocess(conn);
}
cw_dbg(DBG_MSG_ASSEMBLY,"*** Assembling message of type %d (%s) ***",
msg->type, msg->name);
dst = msgptr+8;
len =0;
cw_dbg(DBG_X,"setting with update CFG");
params.conn=conn;
params.cfg_list[0]=conn->update_cfg;
params.cfg_list[1]=conn->local_cfg;
params.cfg_list[2]=conn->global_cfg;
params.cfg_list[3]=NULL;
params.msgset=conn->msgset;
params.msgdata=msg;
params.debug_details=details;
*details=0;
len = cw_encode_elements(&params,msg->elements_list,dst);
/* mlist_foreach(elem,msg->elements_list){
struct cw_ElemData * data;
struct cw_ElemHandler * handler;
data = mlistelem_dataptr(elem);
handler = cw_msgset_get_elemhandler(conn->msgset,data->proto,data->vendor,data->id);
cw_dbg(DBG_MSG_ASSEMBLY," Add Elem: %d %d %d %s", data->proto, data->vendor, data->id, handler->name);
if (handler==NULL){
cw_log(LOG_ERR,"Can't put message element %d %d %d, no handler defined.",
data->proto,data->vendor,data->id);
continue;
}
if (handler->put == NULL){
if (data->mand){
cw_log(LOG_ERR,"Error: Can't add mandatory message element %d - %s, no put method defined",
handler->id, handler->name);
}
continue;
}
*/
/*
if (!data->mand){
if (!cw_cfg_base_exists(params.cfg,handler->key)){
cw_dbg(DBG_X,"nothing todo");
continue;
}
}
l = handler->put(handler,&params,dst+len);
*/
/* if(l>0)
cw_dbg_elem(DBG_ELEM_OUT,conn,type,handler,dst+len,l);
* if (strlen(details)){
cw_dbg(DBG_ELEM_DETAIL," %s",params.debug_details);
}
*/ //len += l;
// }
cw_set_msg_elems_len(msgptr, len);
cw_dbg(DBG_MSG_ASSEMBLY,"*** Done assenmbling message of type %d (%s) ***",
msg->type, msg->name);
if (type & 1) {
/* It's a request, so we have to set seqnum */
int s = conn_get_next_seqnum(conn);
cw_set_msg_seqnum(msgptr,s);
}
{
printf ("----------------------------------- redecode -----------------------------\n");
uint8_t *elems_ptr;
int offset = cw_get_hdr_msg_offset(rawout);
uint8_t *msg_ptr = rawout + offset;
int elems_len = cw_get_msg_elems_len(msg_ptr);
elems_ptr = cw_get_msg_elems_ptr(msg_ptr);
cw_Cfg_t * cfg = cw_cfg_create();
struct cw_ElemHandlerParams params;
memset(&params,0,sizeof(struct cw_ElemHandlerParams));
params.cfg=cfg;
params.msgset=conn->msgset;
params.msgdata=msg;
params.mand_found = mavl_create_conststr();
cw_decode_elements( &params, elems_ptr,elems_len);
cw_cfg_destroy(cfg);
if (params.mand_found){
cw_check_missing_mand(msg, params.mand_found,conn->msgset->handlers_by_key);
mavl_destroy(params.mand_found);
}
printf ("----------------------------------- end redecode -----------------------------\n");
}
return CAPWAP_RESULT_SUCCESS;
}
int cw_decode_element(struct cw_ElemHandlerParams *params, int proto,
int vendor, int elem_id, uint8_t * data, int len)
{
struct cw_ElemHandler *handler;
struct cw_ElemData *elem_data, elem_data_search;
int rc;
//params->elem = NULL;
/* try to retrieve a handler for this message element */
handler =
cw_msgset_get_elemhandler(params->msgset, proto, vendor,
elem_id);
if (!handler) {
cw_dbg(DBG_ELEM_ERR,
"Unrecognized message element: %d, ignoring", elem_id);
return CAPWAP_RESULT_UNRECOGNIZED_MESSAGE_ELEMENT;
}
/* check if this message element in the current message allowed */
elem_data_search.id = elem_id;
elem_data_search.proto = proto;
elem_data_search.vendor = vendor;
elem_data = mavl_get(params->msgdata->elements_tree, &elem_data_search);
if (!elem_data) {
cw_dbg(DBG_ELEM_ERR, "Element %d - %s, not allowed here",
elem_id, handler->name);
return CAPWAP_RESULT_UNRECOGNIZED_MESSAGE_ELEMENT;
}
/* check the length of the message */
if (len < handler->min_len) {
cw_dbg(DBG_ELEM_ERR,
"%d (%s) message element too short, len=%d, min len=%d",
handler->id, handler->name, len, handler->min_len);
return -1;
}
if (elem_data->mand && params->mand_found) {
mavl_add_str(params->mand_found, handler->key);
}
if (len > handler->max_len && handler->max_len) {
cw_dbg(DBG_ELEM_ERR,
"%d (%s) message element too big, len=%d, max len=%d",
handler->id, handler->name, len, handler->max_len);
/* TODO XXX truncate the element instead of return */
return -1;
}
cw_dbg_elem(DBG_ELEM_IN, NULL, params->msgdata->type, handler,
data, len);
if (handler->get == NULL) {
cw_log(LOG_ERR, "No get method defined for %d %s", handler->id,
handler->name);
return CAPWAP_RESULT_UNRECOGNIZED_MESSAGE_ELEMENT;
}
rc = handler->get(handler, params, data, len);
return rc;
}
int cw_decode_elements(struct cw_ElemHandlerParams * params, uint8_t * elems_ptr, int elems_len)
{
uint8_t *elem;
// mavl_t mand_found;
// mlist_t unrecognized;
//mand_found = mavl_create_conststr();
//unrecognized = mlist_create(NULL,NULL,sizeof(uint8_t*));
cw_foreach_elem(elem, elems_ptr, elems_len) {
int rc;
int elem_len, elem_id, max_len;
uint8_t * elem_data;
elem_len = cw_get_elem_len(elem);
elem_data=cw_get_elem_data(elem);
elem_id = cw_get_elem_id(elem);
max_len=elems_len-(elem_data-elems_ptr);
if (elem_len > max_len){
cw_dbg(DBG_RFC,
"Messag element claims size of %d bytes, but only %d bytes are left in the payload, truncating.",
elem_len,max_len-4);
}
params->from=NULL; /*from;*/
// params->mand_found=mand_found;
rc = cw_decode_element(params,0,0,elem_id,elem_data,elem_len);
if (cw_result_is_ok(rc))
continue;
if (rc == CAPWAP_RESULT_UNRECOGNIZED_MESSAGE_ELEMENT){
if (params->unrecognized)
mlist_append(params->unrecognized,&elem);
continue;
}
if (rc < 0 ){
continue;
}
}
return 0;
}
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