actube/src/capwap/conn_q_recv_packet.c

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/*
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/>.
*/
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "conn.h"
static int conn_q_recv_packet_(struct conn * conn, uint8_t * buffer,int len,int peek)
{
if ( !conn->cur_packet)
{
if ((conn->cur_packet = conn_q_get_packet(conn)) == 0){
errno = EAGAIN;
return -1;
}
conn->cur_packet_len = *((uint32_t*)conn->cur_packet);
conn->cur_packet_pos=4;
}
if (conn->cur_packet_len > len )
{
memcpy(buffer,conn->cur_packet+conn->cur_packet_pos,len);
if (peek)
return len;
conn->cur_packet_pos+=len;
conn->cur_packet_len-=len;
if (conn->cur_packet_len==0){
free(conn->cur_packet);
conn->cur_packet=0;
}
return len;
}
memcpy(buffer,conn->cur_packet+conn->cur_packet_pos,conn->cur_packet_len);
if (peek)
return conn->cur_packet_len;
free (conn->cur_packet);
conn->cur_packet=0;
return conn->cur_packet_len;
}
int conn_q_recv_packet(struct conn * conn, uint8_t * buffer,int len)
{
return conn_q_recv_packet_(conn,buffer,len,0);
}
int conn_q_recv_packet_peek(struct conn * conn, uint8_t * buffer,int len)
{
return conn_q_recv_packet_(conn,buffer,len,1);
}