summaryrefslogtreecommitdiff
path: root/print-wb.c
diff options
context:
space:
mode:
Diffstat (limited to 'print-wb.c')
-rw-r--r--print-wb.c458
1 files changed, 458 insertions, 0 deletions
diff --git a/print-wb.c b/print-wb.c
new file mode 100644
index 0000000000000..f90170b80e45b
--- /dev/null
+++ b/print-wb.c
@@ -0,0 +1,458 @@
+/*
+ * 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>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+static const char tstr[] = "[|wb]";
+
+/* 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)\
+ ((const struct dophdr *)((const 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 {
+ uint32_t ph_src; /* site id of source */
+ uint32_t ph_ts; /* time stamp (for skew computation) */
+ uint16_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 {
+ uint32_t p_sid; /* session id of initiator */
+ uint32_t p_uid; /* page number */
+};
+
+struct dophdr {
+ uint32_t dh_ts; /* sender's timestamp */
+ uint16_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 */
+ uint32_t pd_sseq; /* start sequence number */
+ uint32_t pd_eseq; /* end sequence number */
+ /* drawing ops follow */
+};
+
+/*
+ * A repair request.
+ */
+struct pkt_rreq {
+ uint32_t pr_id; /* source id of drawops to be repaired */
+ struct PageID pr_page; /* page of drawops */
+ uint32_t pr_sseq; /* start seqno */
+ uint32_t pr_eseq; /* end seqno */
+};
+
+/*
+ * A repair reply.
+ */
+struct pkt_rrep {
+ uint32_t pr_id; /* original site id of ops */
+ struct pkt_dop pr_dop;
+ /* drawing ops follow */
+};
+
+struct id_off {
+ uint32_t id;
+ uint32_t off;
+};
+
+struct pgstate {
+ uint32_t slot;
+ struct PageID page;
+ uint16_t nid;
+ uint16_t rsvd;
+ /* seqptr's */
+};
+
+/*
+ * An announcement packet.
+ */
+struct pkt_id {
+ 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;
+ uint32_t pp_low;
+ uint32_t pp_high;
+};
+
+struct pkt_prep {
+ 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)
+{
+ int i;
+ const char *cp;
+ const struct id_off *io;
+ char c;
+ int nid;
+
+ ND_PRINT((ndo, " wb-id:"));
+ if (len < sizeof(*id) || !ND_TTEST(*id))
+ return (-1);
+ len -= sizeof(*id);
+
+ ND_PRINT((ndo, " %u/%s:%u (max %u/%s:%u) ",
+ EXTRACT_32BITS(&id->pi_ps.slot),
+ ipaddr_string(ndo, &id->pi_ps.page.p_sid),
+ EXTRACT_32BITS(&id->pi_ps.page.p_uid),
+ EXTRACT_32BITS(&id->pi_mslot),
+ ipaddr_string(ndo, &id->pi_mpage.p_sid),
+ EXTRACT_32BITS(&id->pi_mpage.p_uid)));
+
+ nid = EXTRACT_16BITS(&id->pi_ps.nid);
+ len -= sizeof(*io) * nid;
+ io = (const struct id_off *)(id + 1);
+ cp = (const char *)(io + nid);
+ if (ND_TTEST2(*cp, len)) {
+ ND_PRINT((ndo, "\""));
+ fn_print(ndo, (const u_char *)cp, (const u_char *)cp + len);
+ ND_PRINT((ndo, "\""));
+ }
+
+ c = '<';
+ for (i = 0; i < nid && ND_TTEST(*io); ++io, ++i) {
+ ND_PRINT((ndo, "%c%s:%u",
+ c, ipaddr_string(ndo, &io->id), EXTRACT_32BITS(&io->off)));
+ c = ',';
+ }
+ if (i >= nid) {
+ ND_PRINT((ndo, ">"));
+ return (0);
+ }
+ return (-1);
+}
+
+static int
+wb_rreq(netdissect_options *ndo,
+ const struct pkt_rreq *rreq, u_int len)
+{
+ ND_PRINT((ndo, " wb-rreq:"));
+ if (len < sizeof(*rreq) || !ND_TTEST(*rreq))
+ return (-1);
+
+ ND_PRINT((ndo, " please repair %s %s:%u<%u:%u>",
+ ipaddr_string(ndo, &rreq->pr_id),
+ ipaddr_string(ndo, &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(netdissect_options *ndo,
+ const struct pkt_preq *preq, u_int len)
+{
+ ND_PRINT((ndo, " wb-preq:"));
+ if (len < sizeof(*preq) || !ND_TTEST(*preq))
+ return (-1);
+
+ ND_PRINT((ndo, " need %u/%s:%u",
+ EXTRACT_32BITS(&preq->pp_low),
+ ipaddr_string(ndo, &preq->pp_page.p_sid),
+ EXTRACT_32BITS(&preq->pp_page.p_uid)));
+ return (0);
+}
+
+static int
+wb_prep(netdissect_options *ndo,
+ const struct pkt_prep *prep, u_int len)
+{
+ int n;
+ const struct pgstate *ps;
+ const u_char *ep = ndo->ndo_snapend;
+
+ ND_PRINT((ndo, " wb-prep:"));
+ if (len < sizeof(*prep) || !ND_TTEST(*prep))
+ return (-1);
+ n = EXTRACT_32BITS(&prep->pp_n);
+ ps = (const struct pgstate *)(prep + 1);
+ while (--n >= 0 && ND_TTEST(*ps)) {
+ const struct id_off *io, *ie;
+ char c = '<';
+
+ ND_PRINT((ndo, " %u/%s:%u",
+ EXTRACT_32BITS(&ps->slot),
+ ipaddr_string(ndo, &ps->page.p_sid),
+ EXTRACT_32BITS(&ps->page.p_uid)));
+ io = (const struct id_off *)(ps + 1);
+ for (ie = io + ps->nid; io < ie && ND_TTEST(*io); ++io) {
+ ND_PRINT((ndo, "%c%s:%u", c, ipaddr_string(ndo, &io->id),
+ EXTRACT_32BITS(&io->off)));
+ c = ',';
+ }
+ ND_PRINT((ndo, ">"));
+ ps = (const struct pgstate *)io;
+ }
+ return ((const u_char *)ps <= ep? 0 : -1);
+}
+
+
+static 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(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((ndo, " <"));
+ for ( ; ss <= es; ++ss) {
+ int t;
+
+ if (!ND_TTEST(*dh)) {
+ ND_PRINT((ndo, "%s", tstr));
+ break;
+ }
+ t = dh->dh_type;
+
+ if (t > DT_MAXTYPE)
+ ND_PRINT((ndo, " dop-%d!", t));
+ else {
+ ND_PRINT((ndo, " %s", dopstr[t]));
+ if (t == DT_SKIP || t == DT_HOLE) {
+ uint32_t ts = EXTRACT_32BITS(&dh->dh_ts);
+ ND_PRINT((ndo, "%d", ts - ss + 1));
+ if (ss > ts || ts > es) {
+ ND_PRINT((ndo, "[|]"));
+ if (ts < ss)
+ return (0);
+ }
+ ss = ts;
+ }
+ }
+ dh = DOP_NEXT(dh);
+ }
+ ND_PRINT((ndo, " >"));
+ return (0);
+}
+
+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((ndo, " wb-rrep:"));
+ if (len < sizeof(*rrep) || !ND_TTEST(*rrep))
+ return (-1);
+ len -= sizeof(*rrep);
+
+ ND_PRINT((ndo, " for %s %s:%u<%u:%u>",
+ ipaddr_string(ndo, &rrep->pr_id),
+ ipaddr_string(ndo, &dop->pd_page.p_sid),
+ EXTRACT_32BITS(&dop->pd_page.p_uid),
+ EXTRACT_32BITS(&dop->pd_sseq),
+ EXTRACT_32BITS(&dop->pd_eseq)));
+
+ if (ndo->ndo_vflag)
+ return (wb_dops(ndo, dop,
+ EXTRACT_32BITS(&dop->pd_sseq),
+ EXTRACT_32BITS(&dop->pd_eseq)));
+ return (0);
+}
+
+static int
+wb_drawop(netdissect_options *ndo,
+ const struct pkt_dop *dop, u_int len)
+{
+ ND_PRINT((ndo, " wb-dop:"));
+ if (len < sizeof(*dop) || !ND_TTEST(*dop))
+ return (-1);
+ len -= sizeof(*dop);
+
+ ND_PRINT((ndo, " %s:%u<%u:%u>",
+ ipaddr_string(ndo, &dop->pd_page.p_sid),
+ EXTRACT_32BITS(&dop->pd_page.p_uid),
+ EXTRACT_32BITS(&dop->pd_sseq),
+ EXTRACT_32BITS(&dop->pd_eseq)));
+
+ if (ndo->ndo_vflag)
+ return (wb_dops(ndo, dop,
+ EXTRACT_32BITS(&dop->pd_sseq),
+ EXTRACT_32BITS(&dop->pd_eseq)));
+ return (0);
+}
+
+/*
+ * Print whiteboard multicast packets.
+ */
+void
+wb_print(netdissect_options *ndo,
+ register const void *hdr, register u_int len)
+{
+ register const struct pkt_hdr *ph;
+
+ ph = (const struct pkt_hdr *)hdr;
+ if (len < sizeof(*ph) || !ND_TTEST(*ph)) {
+ ND_PRINT((ndo, "%s", tstr));
+ return;
+ }
+ len -= sizeof(*ph);
+
+ if (ph->ph_flags)
+ ND_PRINT((ndo, "*"));
+ switch (ph->ph_type) {
+
+ case PT_KILL:
+ ND_PRINT((ndo, " wb-kill"));
+ return;
+
+ case PT_ID:
+ if (wb_id(ndo, (const struct pkt_id *)(ph + 1), len) >= 0)
+ return;
+ ND_PRINT((ndo, "%s", tstr));
+ break;
+
+ case PT_RREQ:
+ if (wb_rreq(ndo, (const struct pkt_rreq *)(ph + 1), len) >= 0)
+ return;
+ ND_PRINT((ndo, "%s", tstr));
+ break;
+
+ case PT_RREP:
+ if (wb_rrep(ndo, (const struct pkt_rrep *)(ph + 1), len) >= 0)
+ return;
+ ND_PRINT((ndo, "%s", tstr));
+ break;
+
+ case PT_DRAWOP:
+ if (wb_drawop(ndo, (const struct pkt_dop *)(ph + 1), len) >= 0)
+ return;
+ ND_PRINT((ndo, "%s", tstr));
+ break;
+
+ case PT_PREQ:
+ if (wb_preq(ndo, (const struct pkt_preq *)(ph + 1), len) >= 0)
+ return;
+ ND_PRINT((ndo, "%s", tstr));
+ break;
+
+ case PT_PREP:
+ if (wb_prep(ndo, (const struct pkt_prep *)(ph + 1), len) >= 0)
+ return;
+ ND_PRINT((ndo, "%s", tstr));
+ break;
+
+ default:
+ ND_PRINT((ndo, " wb-%d!", ph->ph_type));
+ return;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-12 19:34:39 +0000