projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 300e8bd6 C |
1 | /* egp.h */ |
| 2 | ||
| 3 | /* EGP User Process, ISI 23-Jun-84 */ | |
| 4 | ||
| 5 | /* uses defs.h */ | |
| 6 | ||
| 7 | struct egpngh { | |
| 8 | struct egpngh *ng_next; /* next state table of linked list */ | |
| 9 | /* struct interface *ng_ifp; /* pointer to shared net interface | |
| 10 | table */ | |
| 11 | int ng_state; | |
| 12 | int ng_reach; /* reachability substate */ | |
| 13 | int ng_flags; | |
| 14 | u_char ng_status; /* Info saved for cease retransmission */ | |
| 15 | u_long ng_myaddr; /* My inet address for common net */ | |
| 16 | u_long ng_addr; /* Neighbor's inet address */ | |
| 17 | u_short ng_sid; /* seq.# next acq., hello or poll to send */ | |
| 18 | u_short ng_rid; /* seq.# last acq., hello or poll recvd */ | |
| 19 | ||
| 20 | /* Acquire and hello info */ | |
| 21 | int ng_retry; /* For states ACQUIRE_SENT and CEASE_SENT, | |
| 22 | No. retries to acquire or cease neighbor. | |
| 23 | For NEIGHBOR state, no. consecutive times | |
| 24 | neighbor is unreachable */ | |
| 25 | int ng_hint; /* Send acquire, hello or cease interval | |
| 26 | in seconds */ | |
| 27 | long ng_htime; /* Time for next acquire, hello, or cease */ | |
| 28 | int ng_responses; /* Shift register of responses for determining | |
| 29 | reachability, each set bit corresponds to a | |
| 30 | response, each zero to no response */ | |
| 31 | int ng_rcmd; /* No. acq., hello and poll commands recvd | |
| 32 | since lats check */ | |
| 33 | ||
| 34 | /* NR Poll info */ | |
| 35 | int ng_snpoll; /* No. sends of this NR poll id */ | |
| 36 | int ng_spint; /* Send NR poll interval (in seconds) */ | |
| 37 | long ng_stime; /* Time to send next NR poll */ | |
| 38 | int ng_runsol; /* No. unsolicited NR msgs received for | |
| 39 | previous id */ | |
| 40 | int ng_rnpoll; /* No. polls received before next poll time */ | |
| 41 | int ng_rpint; /* Rcv NR poll interval (in seconds) */ | |
| 42 | long ng_rtime; /* Time to rcv next NR poll */ | |
| 43 | }; | |
| 44 | ||
| 45 | #define egpng struct egpngh | |
| 46 | ||
| 47 | /* States */ | |
| 48 | #define EMPTY 0 | |
| 49 | #define UNACQUIRED 1 | |
| 50 | #define ACQUIRE_SENT 2 | |
| 51 | #define NEIGHBOR 3 | |
| 52 | #define CEASE_SENT 4 | |
| 53 | #define BAD 5 | |
| 54 | ||
| 55 | /* reachability substates for state NEIGHBOR */ | |
| 56 | #define BOTH_UP 0 | |
| 57 | #define NG_DOWN 1 /* according to me my peer is unreachable */ | |
| 58 | #define ME_DOWN 2 /* according to my peer I am unreachable */ | |
| 59 | ||
| 60 | /* flags */ | |
| 61 | #define NG_BAD 1 /* change to state BAD when cease complete */ | |
| 62 | ||
| 63 | /* Basic EGP packet */ | |
| 64 | #define egpkt struct egppkt | |
| 65 | ||
| 66 | egpkt { u_char egp_ver; /* Version # */ | |
| 67 | u_char egp_type; /* Opcode */ | |
| 68 | u_char egp_code; | |
| 69 | u_char egp_status; | |
| 70 | u_short egp_chksum; | |
| 71 | u_short egp_system; /* Autonomous system */ | |
| 72 | u_short egp_id; | |
| 73 | }; | |
| 74 | ||
| 75 | /* EGP neighbor acquisition packet */ | |
| 76 | struct egpacq { | |
| 77 | egpkt ea_pkt; | |
| 78 | u_short ea_hint; /* Hello interval in seconds */ | |
| 79 | u_short ea_pint; /* NR poll interval in seconds */ | |
| 80 | }; | |
| 81 | ||
| 82 | /* EGP NR poll packet */ | |
| 83 | struct egppoll { | |
| 84 | egpkt ep_pkt; | |
| 85 | u_short ep_unused; | |
| 86 | u_long ep_net; /* Source net */ | |
| 87 | }; | |
| 88 | ||
| 89 | /* EGP NR Message packet */ | |
| 90 | struct egpnr { | |
| 91 | egpkt en_pkt; | |
| 92 | u_char en_igw; /* No. internal gateways */ | |
| 93 | u_char en_egw; /* No. external gateways */ | |
| 94 | u_long en_net; /* shared net */ | |
| 95 | }; | |
| 96 | ||
| 97 | #define NRMAXNETUNIT 9 /* maximum size per net in octets of net part | |
| 98 | of NR message */ | |
| 99 | /* EGP Error packet */ | |
| 100 | struct egperr { | |
| 101 | egpkt ee_pkt; | |
| 102 | u_short ee_rsn; | |
| 103 | u_char ee_egphd[12]; /* First 12 bytes of bad egp pkt */ | |
| 104 | }; | |
| 105 | ||
| 106 | #define EGPLEN (sizeof(egpkt)) | |
| 107 | #define EGPVER 2 | |
| 108 | ||
| 109 | /* EGP Types */ | |
| 110 | #define EGPNR 1 | |
| 111 | #define EGPPOLL 2 | |
| 112 | #define EGPACQ 3 | |
| 113 | #define EGPHELLO 5 | |
| 114 | #define EGPERR 8 | |
| 115 | ||
| 116 | /* Neighbor Acquisition Codes */ | |
| 117 | #define NAREQ 0 /* Neighbor acq. request */ | |
| 118 | #define NACONF 1 /* Neighbor acq. confirmation */ | |
| 119 | #define NAREFUS 2 /* Neighbor acq. refuse */ | |
| 120 | #define NACEASE 3 /* Neighbor cease */ | |
| 121 | #define NACACK 4 /* Neighbor cease ack */ | |
| 122 | ||
| 123 | /* Neighbour Acquisition Message Status Info */ | |
| 124 | #define UNSPEC 0 | |
| 125 | #define ACTIVE 1 | |
| 126 | #define PASSIVE 2 | |
| 127 | #define NORESOURCE 3 | |
| 128 | #define ADMINPROHIB 4 | |
| 129 | #define GODOWN 5 | |
| 130 | #define PARAMPROB 6 | |
| 131 | #define PROTOVIOL 7 | |
| 132 | ||
| 133 | /* Neighbor Hello Codes */ | |
| 134 | #define HELLO 0 | |
| 135 | #define HEARDU 1 | |
| 136 | ||
| 137 | /* Reachability, poll and update status */ | |
| 138 | #define INDETERMINATE 0 | |
| 139 | #define UP 1 | |
| 140 | #define DOWN 2 | |
| 141 | #define UNSOLICITED 128 | |
| 142 | ||
| 143 | /* Error reason status */ | |
| 144 | #define EUNSPEC 0 | |
| 145 | #define EBADHEAD 1 | |
| 146 | #define EBADDATA 2 | |
| 147 | #define ENOREACH 3 | |
| 148 | #define EXSPOLL 4 | |
| 149 | #define ENORESPONSE 5 |