/* * 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 #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); }