| # struct netinfo { |
| # struct sockaddr rip_dst; /* destination net/host */ |
| # int rip_metric; /* cost of route */ |
| # }; |
| # struct rip { |
| # u_char rip_cmd; /* request/response */ |
| # u_char rip_vers; /* protocol version # */ |
| # u_char rip_res1[2]; /* pad to 32-bit boundary */ |
| # union { |
| # struct netinfo ru_nets[1]; /* variable length... */ |
| # char ru_tracefile[1]; /* ditto ... */ |
| # } ripun; |
| #define rip_nets ripun.ru_nets |
| #define rip_tracefile ripun.ru_tracefile |
| #define RIPCMD_REQUEST 1 /* want info */ |
| #define RIPCMD_RESPONSE 2 /* responding to request */ |
| #define RIPCMD_TRACEON 3 /* turn tracing on */ |
| #define RIPCMD_TRACEOFF 4 /* turn it off */ |
| #define HOPCNT_INFINITY 16 /* per Xerox NS */ |
| #define MAXPACKETSIZE 512 /* max broadcast size */ |
| |
| ### RIP packet redux |
| ### UDP send FROM clued-rtr/520 to target/520 |
| 2 # RIPCMD_RESPONSE |
| 1 # version |
| 0 # padding |
| 0 |
| |
| # sockaddr-plus-metric structs begin, as many as necessary... |
| 0 # len |
| 2 # AF_INET |
| 0 # port |
| 0 |
| # addr bytes: |
| X |
| Y |
| Z |
| Q |
| 0 # filler, out to 16 bytes [sizeof (sockaddr)] ... |
| 0 |
| 0 |
| 0 |
| 0 |
| 0 |
| 0 |
| 0 |
| 0 # metric: net-order integer |
| 0 |
| 0 |
| 1 |
| |
| ## that's it |
