HP rp5450 HP DLPI Programmer's Guide - Page 206
case DL_TPR
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Sample Programs Connectionless Mode Example printf("error: open failed, errno = %d\n", errno); exit(1); } /* find a PPA to attach to; we assume that the first PPA on the remote is on the same media as the first local PPA */ /* send a PPA_REQ and wait for the PPA_ACK */ ppa_req->dl_primitive = DL_HP_PPA_REQ; put_ctrl(fd, sizeof(dl_hp_ppa_req_t), 0); get_msg(fd); check_ctrl(DL_HP_PPA_ACK); /* make sure we found at least one PPA */ if(ppa_ack->dl_length == 0) { printf("error: no PPAs available\n"); exit(1); } /* examine the first PPA */ ppa_info = (dl_hp_ppa_info_t *)((u_char *)ctrl_area + ppa_ack->dl_offset); ppa = ppa_info->dl_ppa; switch(ppa_info->dl_mac_type) { case DL_CSMACD: case DL_ETHER: mac_name = "Ethernet"; break; case DL_TPR: mac_name = "Token Ring"; break; case DL_FDDI: mac_name = "FDDI"; break; default: printf("error: unknown MAC type in ppa_info\n"); exit(1); } printf("attaching to %s media on PPA %d\n", mac_name, ppa); /* fill in ATTACH_REQ with the PPA we found, send the ATTACH_REQ, and wait for the OK_ACK */ attach_req->dl_primitive = DL_ATTACH_REQ; attach_req->dl_ppa = ppa; put_ctrl(fd, sizeof(dl_attach_req_t), 0); 206 Appendix A