HP UX 11i v2 Networking Software manual Appendix a 151

Sample Programs

Connection Mode

con_req->dl_growth = 0;

/* copy in the dlsap */

tdlsap = (u_char *)ctrl_area + con_req->dl_dest_addr_offset; memcpy(tdlsap, dlsap, dlsap_len);

/* send the connect request */

print_dlsap(”sending CONNECT_REQ to DLSAP ”, dlsap, dlsap_len); put_ctrl(fd, sizeof(dl_connect_req_t) + dlsap_len, 0);

}

/************************************************************************* get a connection response token for a stream; returns the token

*************************************************************************/

u_long
get_token(fd)
int	fd;	/* file descriptor */
{
dl_token_req_t		*tok_req = (dl_token_req_t *)ctrl_area;
dl_token_ack_t		*tok_ack = (dl_token_ack_t *)ctrl_area;

/*

Send down a token request. Note that unlike most of the other messages this one is a PCPROTO message so we call put_ctrl with RS_HIPRI instead of zero.

*/

tok_req->dl_primitive = DL_TOKEN_REQ;

put_ctrl(fd, sizeof(dl_token_req_t), RS_HIPRI);

/* wait for the token ack */ get_msg(fd); check_ctrl(DL_TOKEN_ACK);

/* return the token */ return(tok_ack->dl_token);

}

/************************************************************************* get a connect indication from a stream; returns the correlation number

*************************************************************************/

u_long
connect_ind(fd)
int	fd;	/* file descriptor */
{
dl_connect_ind_t		*con_ind = (dl_connect_ind_t *)ctrl_area;
u_char	*dlsap;
int	dlsap_len;

/* wait for the connect indication */ get_msg(fd); check_ctrl(DL_CONNECT_IND);

/* print the calling DLSAP */

dlsap = (u_char *)ctrl_area + con_ind->dl_calling_addr_offset; dlsap_len = con_ind->dl_calling_addr_length; print_dlsap(”received CONNECT_IND from DLSAP ”, dlsap, dlsap_len);

Appendix A 151