More work on CW VM code ..
FossilOrigin-Name: 3b0cb324535527b32d0e938b03151c75f6100ca2059fc121e2c4d350a8caf8a4
This commit is contained in:
7u83@mail.ru
@ -19,72 +19,274 @@
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "capwap.h"
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#include "dbg.h"
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#include "cw_log.h"
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#include "cw_util.h"
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#include "conn.h"
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#include "sock.h"
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#include <stdio.h> //tube
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#include <stdio.h> //tube
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static int cwrmsg_init_ctrlhdr(struct conn * conn, struct cwrmsg * cwrmsg, uint8_t * msg, int len)
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int conn_send_msg(struct conn *conn, uint8_t * rawmsg);
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/**
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* Init response message header
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*/
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void cw_init_response(struct conn *conn, uint8_t * req)
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{
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if (len<8){
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cw_dbg(DBG_CW_PKT_ERR,"Discarding packet from %s, len=%d (too short)",sock_addr2str(&conn->addr),len);
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uint8_t *buffer = conn->resp_buffer;
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int shbytes = cw_get_hdr_msg_offset(req);
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int dhbytes;
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memcpy(buffer, req, shbytes);
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cw_set_hdr_hlen(buffer, 2);
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cw_set_hdr_flags(buffer, CW_FLAG_HDR_M, 1);
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dhbytes = cw_get_hdr_msg_offset(buffer);
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uint8_t *msgptr = req + shbytes;
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uint8_t *dmsgptr = buffer + dhbytes;
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cw_set_msg_type(dmsgptr, cw_get_msg_type(msgptr) + 1);
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cw_set_msg_seqnum(dmsgptr, cw_get_msg_seqnum(msgptr));
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cw_set_msg_flags(dmsgptr, 0);
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}
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void cw_init_request(struct conn *conn, int msg_id)
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{
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uint8_t *buffer = conn->req_buffer;
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cw_put_dword(buffer + 0, 0);
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cw_put_dword(buffer + 4, 0);
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cw_set_hdr_preamble(buffer, 0);
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cw_set_hdr_hlen(buffer, 2);
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cw_set_hdr_wbid(buffer, 1);
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cw_set_hdr_rid(buffer, 0);
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uint8_t *msgptr = cw_get_hdr_msg_offset(buffer) + buffer;
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cw_set_msg_type(msgptr, msg_id);
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cw_set_msg_flags(msgptr, 0);
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cw_set_msg_elems_len(msgptr, 0);
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}
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/**
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* send a response
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*/
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int cw_send_response(struct conn *conn, uint8_t * rawmsg, int len)
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{
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cw_init_response(conn, rawmsg);
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if (cw_put_msg(conn, conn->resp_buffer) == -1)
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return 0;
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}
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conn_send_msg(conn, conn->resp_buffer);
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return 1;
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}
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uint32_t val;
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/* first dword of header is the message type*/
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cwrmsg->type = ntohl(*((uint32_t*)(msg)));
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/* second dword = seqnum, len and flags */
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val = ntohl(*((uint32_t*)(msg+4)));
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cwrmsg->seqnum = cw_get_dword_bits(val,0,8);
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/**
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* Special case error message, which is sent when an unexpected messages
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* was received or somethin else happened.
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* @param conn conection
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* @param rawmsg the received request message, which the response belongs to
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* @pqram result_code result code to send
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* @return 1
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*/
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int cw_send_error_response(struct conn *conn, uint8_t * rawmsg, uint32_t result_code)
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{
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cw_init_response(conn, rawmsg);
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cwrmsg->msgelems_len=cw_get_dword_bits(val,8,16)-3;
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uint8_t *out = conn->resp_buffer;
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// ch->flags=CW_GET_DWORD_BITS(val,24,8);
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cwrmsg->msgelems=msg+8;
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uint8_t *dst = cw_get_hdr_msg_elems_ptr(out);
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int l = cw_put_elem_result_code(dst, result_code);
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cw_set_msg_elems_len(out + cw_get_hdr_msg_offset(out), l);
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conn_send_msg(conn, conn->resp_buffer);
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return 1;
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}
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static int cw_process_msg(struct conn *conn, uint8_t * rawmsg, int len)
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{
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struct cw_action_in as, *af, *afm;
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uint8_t *msg_ptr = rawmsg + cw_get_hdr_msg_offset(rawmsg);
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int elems_len = cw_get_msg_elems_len(msg_ptr);
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/*
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if (8+elems_len != len){
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cw_dbg(DBG_MSG_ERR,"Discarding message from %s, msgelems len=%d, data len=%d, (strict capwap) ",
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sock_addr2str(&conn->addr),elems_len,len-8);
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if (8+cwrmsg->msgelems_len != len){
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if (conn_is_strict_capwap(conn)){
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cw_dbg(DBG_CW_PKT_ERR,"Discarding packet from %s, msgelems len=%d, data len=%d, (strict capwap) ",
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sock_addr2str(&conn->addr),cwrmsg->msgelems_len,len-8);
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cw_dbg(DBG_MSG_ERR,"Discarding message from %s, msgelems len=%d, data len=%d, (strict capwap) ",
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sock_addr2str(&conn->addr),elems_len,len-8);
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return 0;
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}
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if (8+cwrmsg->msgelems_len < len){
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if (8+elems_len < len){
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cw_dbg(DBG_CW_RFC,"Packet from from %s has %d bytes extra data.",
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sock_addr2str(&conn->addr),len-8-cwrmsg->msgelems_len);
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cwrmsg->msgelems_len=len-8;
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sock_addr2str(&conn->addr),len-8-elems_len);
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elems_len=len-8;
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}
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if (8+cwrmsg->msgelems_len > len){
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if (8+elems_len > len){
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cw_dbg(DBG_CW_RFC,"Packet from from %s hass msgelems len of %d bytes but has only %d bytes of data, truncating.",
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sock_addr2str(&conn->addr),cwrmsg->msgelems_len,len-8);
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sock_addr2str(&conn->addr),elems_len,len-8);
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}
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return 1;
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}
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return 1;
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*/
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/* prepare struct for search operation */
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as.capwap_state = conn->capwap_state;
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as.msg_id = cw_get_msg_id(msg_ptr);
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as.vendor_id = 0;
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as.elem_id = 0;
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as.proto = 0;
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/* Search for state/message combination */
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afm = cw_actionlist_in_get(conn->actions->in, &as);
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if (!afm) {
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/* Throw away unexpected response messages */
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if (!(as.msg_id & 1)) {
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cw_dbg(DBG_MSG_ERR,
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"Message type %d (%s) unexpected/illigal in %s State, discarding.",
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as.msg_id, cw_strmsg(as.msg_id),
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cw_strstate(conn->capwap_state));
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return 0;
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}
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/* Request message not found in current state, check if we know
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anything else about this message type */
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const char *str = cw_strheap_get(conn->actions->strmsg, as.msg_id);
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int result_code = 0;
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if (str) {
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/* Message found, but it was in wrong state */
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cw_dbg(DBG_MSG_ERR,
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"Message type %d (%s) not allowed in %s State.", as.msg_id,
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cw_strmsg(as.msg_id), cw_strstate(as.capwap_state));
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result_code = CW_RESULT_MSG_INVALID_IN_CURRENT_STATE;
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} else {
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/* Message is unknown */
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cw_dbg(DBG_MSG_ERR, "Message type %d (%s) unknown.",
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as.msg_id, cw_strmsg(as.msg_id),
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cw_strstate(as.capwap_state));
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result_code = CW_RESULT_MSG_UNRECOGNIZED;
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}
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cw_send_error_response(conn, rawmsg, result_code);
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return 0;
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}
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/* Execute start processor for message */
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if (afm->start) {
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afm->start(conn, afm, rawmsg, len);
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}
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uint8_t *elems_ptr = cw_get_msg_elems_ptr(msg_ptr);
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uint8_t *elem;
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/* avltree to bag the found mandatory elements */
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conn->mand = intavltree_create();
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/* iterate through message elements */
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cw_foreach_elem(elem, elems_ptr, elems_len) {
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as.elem_id = cw_get_elem_id(elem);
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int elem_len = cw_get_elem_len(elem);
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cw_dbg_elem(conn, as.msg_id, as.elem_id, cw_get_elem_data(elem),
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elem_len);
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af = cw_actionlist_in_get(conn->actions->in, &as);
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if (!af) {
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cw_dbg(DBG_ELEM_ERR, "ELEM_ERR: Element %d (%s) not allowed in msg of type %d (%s).",
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as.elem_id,cw_strelem(as.elem_id), as.msg_id, cw_strmsg(as.msg_id));
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continue;
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}
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if (af->mand) {
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/* add found mandatory message element
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to mand list */
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intavltree_add(conn->mand, af->item_id);
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}
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if (af->start) {
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af->start(conn, af, cw_get_elem_data(elem), elem_len);
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}
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}
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int result_code = 0;
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if (afm->end) {
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result_code = afm->end(conn, afm, rawmsg, len);
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}
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/* if we've got a request message, we always have to send a response message */
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if (as.msg_id & 1) {
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if (result_code > 0) {
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/* the end method gave us an result code, so
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send an error message */
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cw_send_error_response(conn, rawmsg, result_code);
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} else {
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/* regular response message */
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cw_send_response(conn, rawmsg, len);
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}
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}
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else{
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/* whe have got a response message */
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}
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intavltree_destroy(conn->mand);
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return result_code;
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}
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static int process_message(struct conn * conn,uint8_t *rawmsg,int rawlen,int (*cb)(void*,uint8_t *,int),void *cbarg)
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static int process_message(struct conn *conn, uint8_t * rawmsg, int rawlen,
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int (*cb) (void *, uint8_t *, int), void *cbarg)
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{
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uint8_t *msgptr = rawmsg+cw_get_hdr_msg_offset(rawmsg);
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uint8_t *msgptr = rawmsg + cw_get_hdr_msg_offset(rawmsg);
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uint32_t type = cw_get_msg_type(msgptr);
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if (!(type & 0x1)) {
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/* It's a response message, no further examination required. */
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cb(cbarg,rawmsg,rawlen);
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return 0;
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// cb(cbarg, rawmsg, rawlen);
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return cw_process_msg(conn,rawmsg,rawlen);
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}
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/* It's a request message, check if seqnum is right and if
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@ -92,107 +294,92 @@ static int process_message(struct conn * conn,uint8_t *rawmsg,int rawlen,int (*c
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uint8_t seqnum = cw_get_msg_seqnum(msgptr);
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int s1=conn->last_seqnum_received;
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int s2=seqnum;
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int sd=s2-s1;
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int s1 = conn->last_seqnum_received;
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int s2 = seqnum;
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int sd = s2 - s1;
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if ((sd>0 && sd<128) || (sd<0 && sd<-128) || s1<0){
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if ((sd > 0 && sd < 128) || (sd < 0 && sd < -128) || s1 < 0) {
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/* seqnum is ok, normal message processing */
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conn->last_seqnum_received=seqnum;
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cb(cbarg,rawmsg,rawlen);
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return 0;
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conn->last_seqnum_received = seqnum;
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return cw_process_msg(conn,rawmsg,rawlen);
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//cb(cbarg, rawmsg, rawlen);
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//return 0;
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}
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if (sd != 0)
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{
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if (sd != 0) {
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cw_dbg(DBG_MSG_ERR,
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"Discarding message from %s, old seqnum, seqnum = %d, last seqnum=%d",
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sock_addr2str(&conn->addr),s2,s1);
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return 1;
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"Discarding message from %s, old seqnum, seqnum = %d, last seqnum=%d",
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sock_addr2str(&conn->addr), s2, s1);
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errno = EAGAIN;
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return -1;
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}
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/* the received request message was retransmitte by our peer,
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/* the received request message was retransmittet by our peer,
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* let's retransmit our response message if we have one*/
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cw_dbg(DBG_MSG_ERR,"Retransmitted request message from %s detected, seqnum=%d, type=%d",
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sock_addr2str(&conn->addr),s2,type);
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cw_dbg(DBG_MSG_ERR,
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"Retransmitted request message from %s detected, seqnum=%d, type=%d",
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sock_addr2str(&conn->addr), s2, type);
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if (conn->resp_msg.type-1 != type ){
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cw_dbg(DBG_MSG_ERR,"No cached response for retransmission, request seqnum=%d,in cache=%d",s2,conn->resp_msg.type );
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return 0;
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if (cw_get_hdr_msg_type(conn->resp_buffer) - 1 != type) {
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cw_dbg(DBG_MSG_ERR,
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"No cached response for retransmission, request seqnum=%d,in cache=%d",
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s2, conn->resp_msg.type);
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errno = EAGAIN;
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return -1;
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}
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cw_dbg(DBG_MSG_ERR,"Retransmitting response message to %s, seqnum=%d",
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sock_addr2str(&conn->addr),s2);
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conn_send_cwmsg(conn,&conn->resp_msg);
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return 1;
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cw_dbg(DBG_MSG_ERR, "Retransmitting response message to %s, seqnum=%d",
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sock_addr2str(&conn->addr), s2);
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// conn_send_cwmsg(conn, &conn->resp_msg);
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errno = EAGAIN;
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return -1;
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}
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#ifdef WITH_CW_LOG_DEBUG
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static void cw_dbg_packet(struct conn * conn, uint8_t * packet, int len)
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{
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if (!cw_dbg_is_level(DBG_CW_PKT_IN))
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return;
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//int conn_process_packet(struct conn *conn, uint8_t * packet, int len,
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// int (*cb) (void *, uint8_t *, int), void *cbarg)
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/* print the header */
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char hdr[200];
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hdr_print(hdr,packet,len);
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if (!cw_dbg_is_level(DBG_CW_PKT_DMP)){
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cw_dbg(DBG_CW_PKT_IN,"Processing capwap packet from %s, len=%d\n%s",sock_addr2str(&conn->addr),len,hdr);
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return;
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}
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cw_dbg_dmp(DBG_CW_PKT_DMP,packet,len,"Processing packet from %s, len=%d\n%s\n\tDump:",
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sock_addr2str(&conn->addr),len,hdr
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);
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}
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#else
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#define cw_dbg_packet(...)
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#endif
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int conn_process_packet(struct conn * conn, uint8_t *packet, int len,int (*cb)(void*,uint8_t *,int),void *cbarg)
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int conn_process_packet(struct conn *conn, uint8_t * packet, int len)
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{
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if (len<8){
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if (len < 8) {
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/* packet too short */
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cw_dbg(DBG_CW_PKT_ERR,"Discarding packet from %s, packet too short, len=%d",sock_addr2str(&conn->addr),len);
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cw_dbg(DBG_CW_PKT_ERR,
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"Discarding packet from %s, packet too short, len=%d",
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sock_addr2str(&conn->addr), len);
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return 0;
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}
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int preamble = cw_get_hdr_preamble(packet);
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if ( (preamble & 0xf0) != CW_VERSION){
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if ((preamble & 0xf0) != CW_VERSION) {
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/* wrong version */
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cw_dbg(DBG_CW_PKT_ERR,"Discarding packet from %s, wrong version, version=%d",sock_addr2str(&conn->addr),(preamble&0xf0)>>8);
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cw_dbg(DBG_CW_PKT_ERR,
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"Discarding packet from %s, wrong version, version=%d",
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sock_addr2str(&conn->addr), (preamble & 0xf0) >> 8);
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return 0;
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}
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if (preamble & 0xf ) {
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if (preamble & 0xf) {
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/* decode dtls */
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return 0;
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}
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/* log this packet */
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cw_dbg_packet(conn,packet,len);
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cw_dbg_packet(conn, packet, len);
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int offs = cw_get_hdr_msg_offset(packet);
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int offs = cw_get_hdr_msg_offset(packet);
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int payloadlen = len - offs;
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if (payloadlen<0){
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cw_dbg(DBG_CW_PKT_ERR,"Discarding packet from %s, header length greater than len, hlen=%d",sock_addr2str(&conn->addr),offs);
|
||||
if (payloadlen < 0) {
|
||||
cw_dbg(DBG_CW_PKT_ERR,
|
||||
"Discarding packet from %s, header length greater than len, hlen=%d",
|
||||
sock_addr2str(&conn->addr), offs);
|
||||
/* EINVAL */
|
||||
return 0;
|
||||
}
|
||||
@ -206,31 +393,33 @@ int conn_process_packet(struct conn * conn, uint8_t *packet, int len,int (*cb)(v
|
||||
//printf ("Offs is %d RML is %d\n",offs,cw_get_hdr_rmac_len(packet));
|
||||
|
||||
/* Check Radio MAC if preset */
|
||||
if (cw_get_hdr_flag_m(packet)){
|
||||
|
||||
if (cw_get_hdr_rmac_len(packet)+8>offs){
|
||||
if (cw_get_hdr_flag_m(packet)) {
|
||||
|
||||
if (cw_get_hdr_rmac_len(packet) + 8 > offs) {
|
||||
/* wrong rmac size */
|
||||
cw_dbg(DBG_CW_PKT_ERR,"Discarding packet, wrong R-MAC size, size=%d",*(packet+8));
|
||||
cw_dbg(DBG_CW_PKT_ERR,
|
||||
"Discarding packet, wrong R-MAC size, size=%d",
|
||||
*(packet + 8));
|
||||
return 0;
|
||||
}
|
||||
// memcpy(cwrmsg.rmac, packet+8,8);
|
||||
// memcpy(cwrmsg.rmac, packet+8,8);
|
||||
}
|
||||
// else{
|
||||
// cwrmsg.rmac[0]=0;
|
||||
// }
|
||||
// else{
|
||||
// cwrmsg.rmac[0]=0;
|
||||
// }
|
||||
|
||||
|
||||
if (cw_get_hdr_flag_f(packet)){ /* fragmented */
|
||||
uint8_t * f;
|
||||
f = fragman_add(conn->fragman, packet,offs,payloadlen);
|
||||
if (f==NULL)
|
||||
if (cw_get_hdr_flag_f(packet)) { /* fragmented */
|
||||
uint8_t *f;
|
||||
f = fragman_add(conn->fragman, packet, offs, payloadlen);
|
||||
if (f == NULL)
|
||||
return 0;
|
||||
|
||||
cw_dbg_packet(conn,f+4,*(uint32_t*)f);
|
||||
cw_dbg_packet(conn, f + 4, *(uint32_t *) f);
|
||||
|
||||
|
||||
// extern int cw_process_msg(struct conn * conn,uint8_t*msg,int len);
|
||||
// cw_process_msg(conn,f+4,*(uint32_t*)f);
|
||||
|
||||
// extern int cw_process_msg(struct conn * conn,uint8_t*msg,int len);
|
||||
// cw_process_msg(conn,f+4,*(uint32_t*)f);
|
||||
|
||||
//printf("Received a fragmented packetm should process it");
|
||||
//exit(0);
|
||||
@ -241,43 +430,43 @@ int conn_process_packet(struct conn * conn, uint8_t *packet, int len,int (*cb)(v
|
||||
return;
|
||||
};
|
||||
*/
|
||||
process_message(conn,f+4,*(uint32_t*)f,cb,cbarg);
|
||||
int rc = process_message(conn, f + 4, *(uint32_t *) f, NULL, NULL);
|
||||
|
||||
free (f);
|
||||
return 1;
|
||||
free(f);
|
||||
return rc;
|
||||
}
|
||||
|
||||
//extern int cw_process_msg(struct conn * conn,uint8_t*msg,int len);
|
||||
//cw_process_msg(conn,packet,len);
|
||||
|
||||
|
||||
//if (!cwrmsg_init_ctrlhdr(conn,&cwrmsg,packet+hlen,len-hlen) ){
|
||||
// cw_dbg(DBG_CW_PKT_ERR,"Discarding packet from %s, len=%d (too short)",sock_addr2str(&conn->addr));
|
||||
// return;
|
||||
// cw_dbg(DBG_CW_PKT_ERR,"Discarding packet from %s, len=%d (too short)",sock_addr2str(&conn->addr));
|
||||
// return;
|
||||
//}
|
||||
|
||||
//msg_4*((val >> 19) & 0x1f);
|
||||
process_message(conn,packet,len,cb,cbarg);
|
||||
return 1;
|
||||
return process_message(conn, packet, len, NULL,NULL);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Used as main message loop
|
||||
*/
|
||||
*/
|
||||
int cw_read_messages(struct conn *conn)
|
||||
{
|
||||
uint8_t buf[2024];
|
||||
int len = 2024;
|
||||
uint8_t buf[2024];
|
||||
int len = 2024;
|
||||
|
||||
int n = conn->read(conn, buf, len);
|
||||
if (n<0 )
|
||||
int n = conn->read(conn, buf, len);
|
||||
if (n < 0)
|
||||
return n;
|
||||
|
||||
if (n > 0)
|
||||
conn_process_packet(conn, buf, n, cw_process_msg, conn);
|
||||
|
||||
|
||||
if (n > 0) {
|
||||
printf("Have a packet with %d bytes\n",n);
|
||||
return conn_process_packet(conn, buf, n);
|
||||
}
|
||||
//printf("DTLS_ERROR: %d\n",conn->dtls_error);
|
||||
errno = EAGAIN;
|
||||
return -1;
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user