/* * 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. */ #ifndef lint static const char rcsid[] _U_ = "@(#) $Header: /tcpdump/master/tcpdump/print-wb.c,v 1.30.2.3 2004/03/24 04:06:52 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "interface.h" #include "addrtoname.h" #include "extract.h" /* XXX need to add byte-swapping macros! */ /* XXX - you mean like the ones in "extract.h"? */ /* * Largest packet size. Everything should fit within this space. * For instance, multiline objects are sent piecewise. */ #define MAXFRAMESIZE 1024 /* * 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) ((((int)(x)) + (DOP_ALIGN - 1)) & ~(DOP_ALIGN - 1)) #define DOP_NEXT(d)\ ((struct dophdr *)((u_char *)(d) + \ DOP_ROUNDUP(EXTRACT_16BITS(&(d)->dh_len) + sizeof(*(d))))) /* * Format of the whiteboard packet header. * The transport level header. */ struct pkt_hdr { u_int32_t ph_src; /* site id of source */ u_int32_t ph_ts; /* time stamp (for skew computation) */ u_int16_t ph_version; /* version number */ u_char ph_type; /* message type */ u_char 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 */ #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 */ struct PageID { u_int32_t p_sid; /* session id of initiator */ u_int32_t p_uid; /* page number */ }; struct dophdr { u_int32_t dh_ts; /* sender's timestamp */ u_int16_t dh_len; /* body length */ u_char dh_flags; u_char 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 #define DT_MAXTYPE 15 /* * A drawing operation. */ struct pkt_dop { struct PageID pd_page; /* page that operations apply to */ u_int32_t pd_sseq; /* start sequence number */ u_int32_t pd_eseq; /* end sequence number */ /* drawing ops follow */ }; /* * A repair request. */ struct pkt_rreq { u_int32_t pr_id; /* source id of drawops to be repaired */ struct PageID pr_page; /* page of drawops */ u_int32_t pr_sseq; /* start seqno */ u_int32_t pr_eseq; /* end seqno */ }; /* * A repair reply. */ struct pkt_rrep { u_int32_t pr_id; /* original site id of ops */ struct pkt_dop pr_dop; /* drawing ops follow */ }; struct id_off { u_int32_t id; u_int32_t off; }; struct pgstate { u_int32_t slot; struct PageID page; u_int16_t nid; u_int16_t rsvd; /* seqptr's */ }; /* * An announcement packet. */ struct pkt_id { u_int32_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; u_int32_t pp_low; u_int32_t pp_high; }; struct pkt_prep { u_int32_t pp_n; /* size of pageid array */ /* pgstate's follow */ }; static int wb_id(const struct pkt_id *id, u_int len) { int i; const char *cp; const struct id_off *io; char c; int nid; printf(" wb-id:"); if (len < sizeof(*id) || (u_char *)(id + 1) > snapend) return (-1); len -= sizeof(*id); printf(" %u/%s:%u (max %u/%s:%u) ", EXTRACT_32BITS(&id->pi_ps.slot), ipaddr_string(&id->pi_ps.page.p_sid), EXTRACT_32BITS(&id->pi_ps.page.p_uid), EXTRACT_32BITS(&id->pi_mslot), ipaddr_string(&id->pi_mpage.p_sid), EXTRACT_32BITS(&id->pi_mpage.p_uid)); nid = EXTRACT_16BITS(&id->pi_ps.nid); len -= sizeof(*io) * nid; io = (struct id_off *)(id + 1); cp = (char *)(io + nid); if ((u_char *)cp + len <= snapend) { putchar('"'); (void)fn_print((u_char *)cp, (u_char *)cp + len); putchar('"'); } c = '<'; for (i = 0; i < nid && (u_char *)(io + 1) <= snapend; ++io, ++i) { printf("%c%s:%u", c, ipaddr_string(&io->id), EXTRACT_32BITS(&io->off)); c = ','; } if (i >= nid) { printf(">"); return (0); } return (-1); } static int wb_rreq(const struct pkt_rreq *rreq, u_int len) { printf(" wb-rreq:"); if (len < sizeof(*rreq) || (u_char *)(rreq + 1) > snapend) return (-1); printf(" please repair %s %s:%u<%u:%u>", ipaddr_string(&rreq->pr_id), ipaddr_string(&rreq->pr_page.p_sid), EXTRACT_32BITS(&rreq->pr_page.p_uid), EXTRACT_32BITS(&rreq->pr_sseq), EXTRACT_32BITS(&rreq->pr_eseq)); return (0); } static int wb_preq(const struct pkt_preq *preq, u_int len) { printf(" wb-preq:"); if (len < sizeof(*preq) || (u_char *)(preq + 1) > snapend) return (-1); printf(" need %u/%s:%u", EXTRACT_32BITS(&preq->pp_low), ipaddr_string(&preq->pp_page.p_sid), EXTRACT_32BITS(&preq->pp_page.p_uid)); return (0); } static int wb_prep(const struct pkt_prep *prep, u_int len) { int n; const struct pgstate *ps; const u_char *ep = snapend; printf(" wb-prep:"); if (len < sizeof(*prep)) { return (-1); } n = EXTRACT_32BITS(&prep->pp_n); ps = (const struct pgstate *)(prep + 1); while (--n >= 0 && (u_char *)(ps + 1) <= ep) { const struct id_off *io, *ie; char c = '<'; printf(" %u/%s:%u", EXTRACT_32BITS(&ps->slot), ipaddr_string(&ps->page.p_sid), EXTRACT_32BITS(&ps->page.p_uid)); io = (struct id_off *)(ps + 1); for (ie = io + ps->nid; io < ie && (u_char *)(io + 1) <= ep; ++io) { printf("%c%s:%u", c, ipaddr_string(&io->id), EXTRACT_32BITS(&io->off)); c = ','; } printf(">"); ps = (struct pgstate *)io; } return ((u_char *)ps <= ep? 0 : -1); } const char *dopstr[] = { "dop-0!", "dop-1!", "RECT", "LINE", "ML", "DEL", "XFORM", "ELL", "CHAR", "STR", "NOP", "PSCODE", "PSCOMP", "REF", "SKIP", "HOLE", }; static int wb_dops(const struct dophdr *dh, u_int32_t ss, u_int32_t es) { printf(" <"); for ( ; ss <= es; ++ss) { register int t = dh->dh_type; if (t > DT_MAXTYPE) printf(" dop-%d!", t); else { printf(" %s", dopstr[t]); if (t == DT_SKIP || t == DT_HOLE) { u_int32_t ts = EXTRACT_32BITS(&dh->dh_ts); printf("%d", ts - ss + 1); if (ss > ts || ts > es) { printf("[|]"); if (ts < ss) return (0); } ss = ts; } } dh = DOP_NEXT(dh); if ((u_char *)dh > snapend) { printf("[|wb]"); break; } } printf(" >"); return (0); } static int wb_rrep(const struct pkt_rrep *rrep, u_int len) { const struct pkt_dop *dop = &rrep->pr_dop; printf(" wb-rrep:"); if (len < sizeof(*rrep) || (u_char *)(rrep + 1) > snapend) return (-1); len -= sizeof(*rrep); printf(" for %s %s:%u<%u:%u>", ipaddr_string(&rrep->pr_id), ipaddr_string(&dop->pd_page.p_sid), EXTRACT_32BITS(&dop->pd_page.p_uid), EXTRACT_32BITS(&dop->pd_sseq), EXTRACT_32BITS(&dop->pd_eseq)); if (vflag) return (wb_dops((const struct dophdr *)(dop + 1), EXTRACT_32BITS(&dop->pd_sseq), EXTRACT_32BITS(&dop->pd_eseq))); return (0); } static int wb_drawop(const struct pkt_dop *dop, u_int len) { printf(" wb-dop:"); if (len < sizeof(*dop) || (u_char *)(dop + 1) > snapend) return (-1); len -= sizeof(*dop); printf(" %s:%u<%u:%u>", ipaddr_string(&dop->pd_page.p_sid), EXTRACT_32BITS(&dop->pd_page.p_uid), EXTRACT_32BITS(&dop->pd_sseq), EXTRACT_32BITS(&dop->pd_eseq)); if (vflag) return (wb_dops((const struct dophdr *)(dop + 1), EXTRACT_32BITS(&dop->pd_sseq), EXTRACT_32BITS(&dop->pd_eseq))); return (0); } /* * Print whiteboard multicast packets. */ void wb_print(register const void *hdr, register u_int len) { register const struct pkt_hdr *ph; ph = (const struct pkt_hdr *)hdr; if (len < sizeof(*ph) || (u_char *)(ph + 1) > snapend) { printf("[|wb]"); return; } len -= sizeof(*ph); if (ph->ph_flags) printf("*"); switch (ph->ph_type) { case PT_KILL: printf(" wb-kill"); return; case PT_ID: if (wb_id((struct pkt_id *)(ph + 1), len) >= 0) return; break; case PT_RREQ: if (wb_rreq((struct pkt_rreq *)(ph + 1), len) >= 0) return; break; case PT_RREP: if (wb_rrep((struct pkt_rrep *)(ph + 1), len) >= 0) return; break; case PT_DRAWOP: if (wb_drawop((struct pkt_dop *)(ph + 1), len) >= 0) return; break; case PT_PREQ: if (wb_preq((struct pkt_preq *)(ph + 1), len) >= 0) return; break; case PT_PREP: if (wb_prep((struct pkt_prep *)(ph + 1), len) >= 0) return; break; default: printf(" wb-%d!", ph->ph_type); return; } }