1 2 /* 3 * Kernel variables for NSP 4 */ 5 6 typedef short nsp_seq; 7 8 /* 9 * NSP control block, ala Session Control Port, 10 * p. 41-44, NSP spec. 11 */ 12 struct nspcb { 13 struct nspcb *n_next, *n_prev; /* list of all NSP cb's */ 14 struct nspcb *n_head; /* pointer to head of list */ 15 struct nspq *nq_next, *nq_prev; /* retransmit queue */ 16 /* NEED STUFF FOR INPUT REASSEMBLY */ 17 struct socket *n_socket; /* back pointer to socket */ 18 char n_state; /* state of the port */ 19 char n_flags; /* flags, see below */ 20 short n_retrans; /* count of message retransmissions */ 21 short n_segsize; /* transmit segment size */ 22 u_short n_node; /* remote node address */ 23 u_short n_loc; /* local link address */ 24 u_short n_rem; /* remote link address */ 25 /* timer variables */ 26 u_short nt_dat; /* timeout for data segments */ 27 u_short nt_oth; /* timeout for other data */ 28 u_short nt_con; /* timeout for connect, disconnect */ 29 /* sequence variables */ 30 nsp_seq nn_dat; /* number of next data segment to transmit */ 31 nsp_seq nn_oth; /* number of next other data segment */ 32 nsp_seq nn_high; /* highest numbered data segment queued */ 33 /* error control variables */ 34 nsp_seq na_xmtdat; /* number of last data segment we acked */ 35 nsp_seq na_xmtoth; /* number of last other data we acked */ 36 nsp_seq na_rcvdat; /* number of highest data segment ack rcv'ed */ 37 /* flow control variables */ 38 char nf_locdat; /* data request count */ 39 char nf_locint; /* flow control state for receiving intr data */ 40 char nf_remdat; /* data request count from remote */ 41 char nf_remint; /* interrupt request count from remote */ 42 /* buffers for optional data */ 43 u_short nb_src; /* source node addr for rcv CI */ 44 struct mbuf *nb_con; /* data for rcv or xmt CI */ 45 struct mbuf *nb_xmt; /* data for xmt CC, DI, Intr */ 46 struct mbuf *nb_rcv; /* data for rcv CC, DI, Intr */ 47 }; 48 49 #define sotonspcb(so) ((struct nspcb *)(so)->so_pcb) 50 51 /* port states, p. 34-36 */ 52 #define NS_O 0 /* open */ 53 #define NS_CR 1 /* connect received */ 54 #define NS_DR 2 /* disconnect reject */ 55 #define NS_DRC 3 /* disconnect reject complete */ 56 #define NS_CC 4 /* connect confirm */ 57 #define NS_CI 5 /* connect initiate */ 58 #define NS_NR 6 /* no resources */ 59 #define NS_NC 7 /* no communication */ 60 #define NS_CD 8 /* connect delivered */ 61 #define NS_RJ 9 /* rejected */ 62 #define NS_RUN 10 /* running */ 63 #define NS_DI 11 /* disconnect initiate */ 64 #define NS_DIC 12 /* disconnect complete */ 65 #define NS_DN 13 /* disconnect notification */ 66 #define NS_CL 14 /* closed */ 67 #define NS_CN 15 /* closed notification */ 68 #define NS_LI 16 /* listen for connection */ 69 70 /* flags */ 71 #define NF_DATACK 0001 /* data acknowledgement required */ 72 #define NF_OTHACK 0002 /* other data acknowledgement required */ 73 #define NF_CON 0004 /* connect data available */ 74 #define NF_INTAVAIL 0010 /* transmit interrupt data available */ 75 #define NF_OTHSENT 0020 /* other data message has been sent */ 76 #define NF_OTHINTR 0040 /* other data message was an interrupt msg */ 77 #define NF_DATOFF 0100 /* on/off switch for data flow control */ 78 79 /* locint states */ 80 /* I STILL DON'T UNDERSTAND THIS WELL ENOUGH */ 81 #define NFL_EMPTY 0 82 #define NFL_INTR 1 83 #define NFL_SEND 2 84