| /* |
| * Copyright (c) 1993, 1994, 1995, 1996 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that: (1) source code distributions |
| * retain the above copyright notice and this paragraph in its entirety, (2) |
| * distributions including binary code include the above copyright notice and |
| * this paragraph in its entirety in the documentation or other materials |
| * provided with the distribution, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| * the University nor the names of its contributors may be used to endorse |
| * or promote products derived from this software without specific prior |
| * written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| /* \summary: White Board printer */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include "netdissect-stdinc.h" |
| |
| #define ND_LONGJMP_FROM_TCHECK |
| #include "netdissect.h" |
| #include "addrtoname.h" |
| #include "extract.h" |
| |
| |
| #if 0 |
| /* |
| * Largest packet size. Everything should fit within this space. |
| * For instance, multiline objects are sent piecewise. |
| */ |
| #define MAXFRAMESIZE 1024 |
| #endif |
| |
| /* |
| * Multiple drawing ops can be sent in one packet. Each one starts on a |
| * an even multiple of DOP_ALIGN bytes, which must be a power of two. |
| */ |
| #define DOP_ALIGN 4 |
| #define DOP_ROUNDUP(x) roundup2(x, DOP_ALIGN) |
| #define DOP_NEXT(d)\ |
| ((const struct dophdr *)((const u_char *)(d) + \ |
| DOP_ROUNDUP(GET_BE_U_2((d)->dh_len) + sizeof(*(d))))) |
| |
| /* |
| * Format of the whiteboard packet header. |
| * The transport level header. |
| */ |
| struct pkt_hdr { |
| nd_uint32_t ph_src; /* site id of source */ |
| nd_uint32_t ph_ts; /* time stamp (for skew computation) */ |
| nd_uint16_t ph_version; /* version number */ |
| nd_uint8_t ph_type; /* message type */ |
| nd_uint8_t ph_flags; /* message flags */ |
| }; |
| |
| /* Packet types */ |
| #define PT_DRAWOP 0 /* drawing operation */ |
| #define PT_ID 1 /* announcement packet */ |
| #define PT_RREQ 2 /* repair request */ |
| #define PT_RREP 3 /* repair reply */ |
| #define PT_KILL 4 /* terminate participation */ |
| #define PT_PREQ 5 /* page vector request */ |
| #define PT_PREP 7 /* page vector reply */ |
| |
| #if 0 |
| #ifdef PF_USER |
| #undef PF_USER /* {Digital,Tru64} UNIX define this, alas */ |
| #endif |
| |
| /* flags */ |
| #define PF_USER 0x01 /* hint that packet has interactive data */ |
| #define PF_VIS 0x02 /* only visible ops wanted */ |
| #endif |
| |
| struct PageID { |
| nd_uint32_t p_sid; /* session id of initiator */ |
| nd_uint32_t p_uid; /* page number */ |
| }; |
| |
| struct dophdr { |
| nd_uint32_t dh_ts; /* sender's timestamp */ |
| nd_uint16_t dh_len; /* body length */ |
| nd_uint8_t dh_flags; |
| nd_uint8_t dh_type; /* body type */ |
| /* body follows */ |
| }; |
| /* |
| * Drawing op sub-types. |
| */ |
| #define DT_RECT 2 |
| #define DT_LINE 3 |
| #define DT_ML 4 |
| #define DT_DEL 5 |
| #define DT_XFORM 6 |
| #define DT_ELL 7 |
| #define DT_CHAR 8 |
| #define DT_STR 9 |
| #define DT_NOP 10 |
| #define DT_PSCODE 11 |
| #define DT_PSCOMP 12 |
| #define DT_REF 13 |
| #define DT_SKIP 14 |
| #define DT_HOLE 15 |
| static const struct tok dop_str[] = { |
| { DT_RECT, "RECT" }, |
| { DT_LINE, "LINE" }, |
| { DT_ML, "ML" }, |
| { DT_DEL, "DEL" }, |
| { DT_XFORM, "XFORM" }, |
| { DT_ELL, "ELL" }, |
| { DT_CHAR, "CHAR" }, |
| { DT_STR, "STR" }, |
| { DT_NOP, "NOP" }, |
| { DT_PSCODE, "PSCODE" }, |
| { DT_PSCOMP, "PSCOMP" }, |
| { DT_REF, "REF" }, |
| { DT_SKIP, "SKIP" }, |
| { DT_HOLE, "HOLE" }, |
| { 0, NULL } |
| }; |
| |
| /* |
| * A drawing operation. |
| */ |
| struct pkt_dop { |
| struct PageID pd_page; /* page that operations apply to */ |
| nd_uint32_t pd_sseq; /* start sequence number */ |
| nd_uint32_t pd_eseq; /* end sequence number */ |
| /* drawing ops follow */ |
| }; |
| |
| /* |
| * A repair request. |
| */ |
| struct pkt_rreq { |
| nd_uint32_t pr_id; /* source id of drawops to be repaired */ |
| struct PageID pr_page; /* page of drawops */ |
| nd_uint32_t pr_sseq; /* start seqno */ |
| nd_uint32_t pr_eseq; /* end seqno */ |
| }; |
| |
| /* |
| * A repair reply. |
| */ |
| struct pkt_rrep { |
| nd_uint32_t pr_id; /* original site id of ops */ |
| struct pkt_dop pr_dop; |
| /* drawing ops follow */ |
| }; |
| |
| struct id_off { |
| nd_uint32_t id; |
| nd_uint32_t off; |
| }; |
| |
| struct pgstate { |
| nd_uint32_t slot; |
| struct PageID page; |
| nd_uint16_t nid; |
| nd_uint16_t rsvd; |
| /* seqptr's */ |
| }; |
| |
| /* |
| * An announcement packet. |
| */ |
| struct pkt_id { |
| nd_uint32_t pi_mslot; |
| struct PageID pi_mpage; /* current page */ |
| struct pgstate pi_ps; |
| /* seqptr's */ |
| /* null-terminated site name */ |
| }; |
| |
| struct pkt_preq { |
| struct PageID pp_page; |
| nd_uint32_t pp_low; |
| nd_uint32_t pp_high; |
| }; |
| |
| struct pkt_prep { |
| nd_uint32_t pp_n; /* size of pageid array */ |
| /* pgstate's follow */ |
| }; |
| |
| static int |
| wb_id(netdissect_options *ndo, |
| const struct pkt_id *id, u_int len) |
| { |
| u_int i; |
| const u_char *sitename; |
| const struct id_off *io; |
| char c; |
| u_int nid; |
| |
| ND_PRINT(" wb-id:"); |
| if (len < sizeof(*id)) |
| return (-1); |
| len -= sizeof(*id); |
| |
| ND_PRINT(" %u/%s:%u (max %u/%s:%u) ", |
| GET_BE_U_4(id->pi_ps.slot), |
| GET_IPADDR_STRING(id->pi_ps.page.p_sid), |
| GET_BE_U_4(id->pi_ps.page.p_uid), |
| GET_BE_U_4(id->pi_mslot), |
| GET_IPADDR_STRING(id->pi_mpage.p_sid), |
| GET_BE_U_4(id->pi_mpage.p_uid)); |
| /* now the rest of the fixed-size part of struct pkt_id */ |
| ND_TCHECK_SIZE(id); |
| |
| nid = GET_BE_U_2(id->pi_ps.nid); |
| if (len < sizeof(*io) * nid) |
| return (-1); |
| len -= sizeof(*io) * nid; |
| io = (const struct id_off *)(id + 1); |
| sitename = (const u_char *)(io + nid); |
| |
| c = '<'; |
| for (i = 0; i < nid; ++io, ++i) { |
| ND_PRINT("%c%s:%u", |
| c, GET_IPADDR_STRING(io->id), GET_BE_U_4(io->off)); |
| c = ','; |
| } |
| ND_PRINT("> \""); |
| nd_printjnp(ndo, sitename, len); |
| ND_PRINT("\""); |
| return (0); |
| } |
| |
| static int |
| wb_rreq(netdissect_options *ndo, |
| const struct pkt_rreq *rreq, u_int len) |
| { |
| ND_PRINT(" wb-rreq:"); |
| if (len < sizeof(*rreq)) |
| return (-1); |
| |
| ND_PRINT(" please repair %s %s:%u<%u:%u>", |
| GET_IPADDR_STRING(rreq->pr_id), |
| GET_IPADDR_STRING(rreq->pr_page.p_sid), |
| GET_BE_U_4(rreq->pr_page.p_uid), |
| GET_BE_U_4(rreq->pr_sseq), |
| GET_BE_U_4(rreq->pr_eseq)); |
| return (0); |
| } |
| |
| static int |
| wb_preq(netdissect_options *ndo, |
| const struct pkt_preq *preq, u_int len) |
| { |
| ND_PRINT(" wb-preq:"); |
| if (len < sizeof(*preq)) |
| return (-1); |
| |
| ND_PRINT(" need %u/%s:%u", |
| GET_BE_U_4(preq->pp_low), |
| GET_IPADDR_STRING(preq->pp_page.p_sid), |
| GET_BE_U_4(preq->pp_page.p_uid)); |
| /* now the rest of the fixed-size part of struct pkt_req */ |
| ND_TCHECK_SIZE(preq); |
| return (0); |
| } |
| |
| static int |
| wb_prep(netdissect_options *ndo, |
| const struct pkt_prep *prep, u_int len) |
| { |
| u_int n; |
| const struct pgstate *ps; |
| |
| ND_PRINT(" wb-prep:"); |
| if (len < sizeof(*prep)) |
| return (-1); |
| n = GET_BE_U_4(prep->pp_n); |
| ps = (const struct pgstate *)(prep + 1); |
| while (n != 0) { |
| const struct id_off *io, *ie; |
| char c = '<'; |
| |
| ND_PRINT(" %u/%s:%u", |
| GET_BE_U_4(ps->slot), |
| GET_IPADDR_STRING(ps->page.p_sid), |
| GET_BE_U_4(ps->page.p_uid)); |
| /* now the rest of the fixed-size part of struct pgstate */ |
| ND_TCHECK_SIZE(ps); |
| io = (const struct id_off *)(ps + 1); |
| for (ie = io + GET_U_1(ps->nid); io < ie; ++io) { |
| ND_PRINT("%c%s:%u", c, GET_IPADDR_STRING(io->id), |
| GET_BE_U_4(io->off)); |
| c = ','; |
| } |
| ND_PRINT(">"); |
| ps = (const struct pgstate *)io; |
| n--; |
| } |
| return 0; |
| } |
| |
| static void |
| wb_dops(netdissect_options *ndo, const struct pkt_dop *dop, |
| uint32_t ss, uint32_t es) |
| { |
| const struct dophdr *dh = (const struct dophdr *)((const u_char *)dop + sizeof(*dop)); |
| |
| ND_PRINT(" <"); |
| for ( ; ss <= es; ++ss) { |
| u_int t; |
| |
| t = GET_U_1(dh->dh_type); |
| |
| ND_PRINT(" %s", tok2str(dop_str, "dop-%u!", t)); |
| if (t == DT_SKIP || t == DT_HOLE) { |
| uint32_t ts = GET_BE_U_4(dh->dh_ts); |
| ND_PRINT("%u", ts - ss + 1); |
| if (ss > ts || ts > es) { |
| ND_PRINT("[|]"); |
| if (ts < ss) |
| return; |
| } |
| ss = ts; |
| } |
| dh = DOP_NEXT(dh); |
| } |
| ND_PRINT(" >"); |
| } |
| |
| static int |
| wb_rrep(netdissect_options *ndo, |
| const struct pkt_rrep *rrep, u_int len) |
| { |
| const struct pkt_dop *dop = &rrep->pr_dop; |
| |
| ND_PRINT(" wb-rrep:"); |
| if (len < sizeof(*rrep)) |
| return (-1); |
| len -= sizeof(*rrep); |
| |
| ND_PRINT(" for %s %s:%u<%u:%u>", |
| GET_IPADDR_STRING(rrep->pr_id), |
| GET_IPADDR_STRING(dop->pd_page.p_sid), |
| GET_BE_U_4(dop->pd_page.p_uid), |
| GET_BE_U_4(dop->pd_sseq), |
| GET_BE_U_4(dop->pd_eseq)); |
| |
| if (ndo->ndo_vflag) |
| wb_dops(ndo, dop, |
| GET_BE_U_4(dop->pd_sseq), |
| GET_BE_U_4(dop->pd_eseq)); |
| return (0); |
| } |
| |
| static int |
| wb_drawop(netdissect_options *ndo, |
| const struct pkt_dop *dop, u_int len) |
| { |
| ND_PRINT(" wb-dop:"); |
| if (len < sizeof(*dop)) |
| return (-1); |
| len -= sizeof(*dop); |
| |
| ND_PRINT(" %s:%u<%u:%u>", |
| GET_IPADDR_STRING(dop->pd_page.p_sid), |
| GET_BE_U_4(dop->pd_page.p_uid), |
| GET_BE_U_4(dop->pd_sseq), |
| GET_BE_U_4(dop->pd_eseq)); |
| |
| if (ndo->ndo_vflag) |
| wb_dops(ndo, dop, |
| GET_BE_U_4(dop->pd_sseq), |
| GET_BE_U_4(dop->pd_eseq)); |
| return (0); |
| } |
| |
| /* |
| * Print whiteboard multicast packets. |
| */ |
| void |
| wb_print(netdissect_options *ndo, |
| const u_char *hdr, u_int len) |
| { |
| const struct pkt_hdr *ph; |
| uint8_t type; |
| int print_result; |
| |
| ndo->ndo_protocol = "wb"; |
| ph = (const struct pkt_hdr *)hdr; |
| if (len < sizeof(*ph)) |
| goto invalid; |
| ND_TCHECK_SIZE(ph); |
| len -= sizeof(*ph); |
| |
| if (GET_U_1(ph->ph_flags)) |
| ND_PRINT("*"); |
| type = GET_U_1(ph->ph_type); |
| switch (type) { |
| |
| case PT_KILL: |
| ND_PRINT(" wb-kill"); |
| return; |
| |
| case PT_ID: |
| print_result = wb_id(ndo, (const struct pkt_id *)(ph + 1), len); |
| break; |
| |
| case PT_RREQ: |
| print_result = wb_rreq(ndo, (const struct pkt_rreq *)(ph + 1), len); |
| break; |
| |
| case PT_RREP: |
| print_result = wb_rrep(ndo, (const struct pkt_rrep *)(ph + 1), len); |
| break; |
| |
| case PT_DRAWOP: |
| print_result = wb_drawop(ndo, (const struct pkt_dop *)(ph + 1), len); |
| break; |
| |
| case PT_PREQ: |
| print_result = wb_preq(ndo, (const struct pkt_preq *)(ph + 1), len); |
| break; |
| |
| case PT_PREP: |
| print_result = wb_prep(ndo, (const struct pkt_prep *)(ph + 1), len); |
| break; |
| |
| default: |
| ND_PRINT(" wb-%u!", type); |
| print_result = -1; |
| } |
| if (print_result < 0) |
| goto invalid; |
| return; |
| |
| invalid: |
| nd_print_invalid(ndo); |
| } |