bool MsgDataMrg::check_pkg_len(unsigned int pkg_len)
{
if (pkg_len < get_header_len() ||
pkg_len > (XY_MAXBUFF_LEN - get_header_len()))
{
return false;
}
return true;
}
static int read_tap()
{
unsigned char buf[MAX_PACKET_LEN];
int hlen = get_header_len();
int r;
int len;
r = tap_read(tap_fd, buf + hlen, MAX_PACKET_LEN - hlen);
if (r < 0)
{
wmlog_msg(1, "Error while reading from TAP interface");
return r;
}
if (r == 0)
{
return 0;
}
stat_speed_out_mbit += r;
len = fill_data_packet_header(buf, r);
wmlog_dumphexasc(4, buf, len, "Outgoing packet:");
r = set_data(buf, len);
return r;
}
/*
* 读出协议头
*/
int MsgDataMrg::read_head(char * buff)
{
int offset = 0;
//unsigned int pkg_len = 0;
offset += ReadInt(buff + offset, head.len, 1);
offset += ReadInt(buff + offset, head.cmd, 1);
offset += ReadInt(buff + offset, head.sn, 1);
//offset += ReadBuf(buff + offset, head.uid, UID_SIZE);
offset += ReadInt(buff + offset, head.uid, 1);
offset += ReadInt(buff + offset, head.opt, 1);
offset += ReadInt(buff + offset, head.crc, 1);
offset += ReadInt(buff + offset, head.ver_no,1);
//offset += ReadBuf(buff + offset, head.ext, 24);
//PkgLen = LenCombo >> 8;
//HeadLen = LenCombo << 24 >> 24;
return get_header_len();
}
bool MsgDataMrg::check_head_len(unsigned int len)
{
return get_header_len() > len ? false : true;
}
