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-rw-r--r--print-wb.c445
1 files changed, 445 insertions, 0 deletions
diff --git a/print-wb.c b/print-wb.c
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--- /dev/null
+++ b/print-wb.c
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+/*
+ * 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 16:20:21 +0000