GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/tcpdump/print-wb.c Lines: 0 132 0.0 %
Date: 2017-11-13 Branches: 0 84 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: print-wb.c,v 1.10 2017/08/30 09:23:00 otto Exp $	*/
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/*
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 * Copyright (c) 1993, 1994, 1995, 1996
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that: (1) source code distributions
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 * retain the above copyright notice and this paragraph in its entirety, (2)
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 * distributions including binary code include the above copyright notice and
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 * this paragraph in its entirety in the documentation or other materials
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 * provided with the distribution, and (3) all advertising materials mentioning
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 * features or use of this software display the following acknowledgement:
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 * ``This product includes software developed by the University of California,
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 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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 * the University nor the names of its contributors may be used to endorse
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 * or promote products derived from this software without specific prior
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 * written permission.
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include "interface.h"
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#include "addrtoname.h"
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/* XXX need to add byte-swapping macros! */
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/*
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 * Largest packet size.  Everything should fit within this space.
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 * For instance, multiline objects are sent piecewise.
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 */
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#define MAXFRAMESIZE 1024
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/*
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 * Multiple drawing ops can be sent in one packet.  Each one starts on a
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 * an even multiple of DOP_ALIGN bytes, which must be a power of two.
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 */
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#define DOP_ALIGN 4
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#define DOP_ROUNDUP(x)	((((int)(x)) + (DOP_ALIGN - 1)) & ~(DOP_ALIGN - 1))
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#define DOP_NEXT(d)\
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	((struct dophdr *)((u_char *)(d) + \
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			  DOP_ROUNDUP(ntohs((d)->dh_len) + sizeof(*(d)))))
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/*
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 * Format of the whiteboard packet header.
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 * The transport level header.
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 */
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struct pkt_hdr {
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	u_int32_t ph_src;		/* site id of source */
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	u_int32_t ph_ts;		/* time stamp (for skew computation) */
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	u_short ph_version;	/* version number */
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	u_char ph_type;		/* message type */
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	u_char ph_flags;	/* message flags */
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};
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/* Packet types */
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#define PT_DRAWOP	0	/* drawing operation */
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#define PT_ID		1	/* announcement packet */
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#define PT_RREQ		2	/* repair request */
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#define PT_RREP		3	/* repair reply */
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#define PT_KILL		4	/* terminate participation */
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#define PT_PREQ         5       /* page vector request */
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#define PT_PREP         7       /* page vector reply */
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/* flags */
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#define PF_USER		0x01	/* hint that packet has interactive data */
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#define PF_VIS		0x02	/* only visible ops wanted */
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struct PageID {
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	u_int32_t p_sid;		/* session id of initiator */
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	u_int32_t p_uid;		/* page number */
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};
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struct dophdr {
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	u_int32_t  dh_ts;		/* sender's timestamp */
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	u_short	dh_len;		/* body length */
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	u_char	dh_flags;
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	u_char	dh_type;	/* body type */
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	/* body follows */
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};
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/*
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 * Drawing op sub-types.
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 */
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#define DT_RECT         2
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#define DT_LINE         3
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#define DT_ML           4
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#define DT_DEL          5
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#define DT_XFORM        6
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#define DT_ELL          7
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#define DT_CHAR         8
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#define DT_STR          9
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#define DT_NOP          10
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#define DT_PSCODE       11
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#define DT_PSCOMP       12
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#define DT_REF          13
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#define DT_SKIP         14
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#define DT_HOLE         15
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#define DT_MAXTYPE      15
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/*
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 * A drawing operation.
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 */
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struct pkt_dop {
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	struct PageID pd_page;	/* page that operations apply to */
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	u_int32_t	pd_sseq;	/* start sequence number */
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	u_int32_t	pd_eseq;	/* end sequence number */
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	/* drawing ops follow */
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};
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/*
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 * A repair request.
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 */
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struct pkt_rreq {
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        u_int32_t pr_id;           /* source id of drawops to be repaired */
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        struct PageID pr_page;           /* page of drawops */
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        u_int32_t pr_sseq;         /* start seqno */
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        u_int32_t pr_eseq;         /* end seqno */
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};
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/*
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 * A repair reply.
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 */
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struct pkt_rrep {
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	u_int32_t pr_id;	/* original site id of ops  */
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	struct pkt_dop pr_dop;
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	/* drawing ops follow */
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};
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struct id_off {
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        u_int32_t id;
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        u_int32_t off;
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};
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struct pgstate {
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	u_int32_t slot;
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	struct PageID page;
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	u_short nid;
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	u_short rsvd;
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        /* seqptr's */
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};
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/*
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 * An announcement packet.
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 */
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struct pkt_id {
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	u_int32_t pi_mslot;
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        struct PageID    pi_mpage;        /* current page */
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	struct pgstate pi_ps;
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        /* seqptr's */
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        /* null-terminated site name */
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};
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struct pkt_preq {
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        struct PageID  pp_page;
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        u_int32_t  pp_low;
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        u_int32_t  pp_high;
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};
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struct pkt_prep {
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        u_int32_t  pp_n;           /* size of pageid array */
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        /* pgstate's follow */
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};
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static int
173
wb_id(const struct pkt_id *id, u_int len)
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{
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	int i;
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	const char *cp;
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	const struct id_off *io;
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	char c;
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	int nid;
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181
	printf(" wb-id:");
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	len -= sizeof(*id);
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	if ((u_char *)(id + 1) > snapend)
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		return (-1);
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	printf(" %u/%s:%u (max %u/%s:%u) ",
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	       (u_int32_t)ntohl(id->pi_ps.slot),
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	       ipaddr_string(&id->pi_ps.page.p_sid),
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	       (u_int32_t)ntohl(id->pi_ps.page.p_uid),
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	       (u_int32_t)ntohl(id->pi_mslot),
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	       ipaddr_string(&id->pi_mpage.p_sid),
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	       (u_int32_t)ntohl(id->pi_mpage.p_uid));
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	nid = ntohs(id->pi_ps.nid);
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	len -= sizeof(*io) * nid;
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	io = (struct id_off *)(id + 1);
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	cp = (char *)(io + nid);
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	if ((u_char *)cp + len <= snapend) {
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		putchar('"');
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		(void)fn_print((u_char *)cp, (u_char *)cp + len);
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		putchar('"');
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	}
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	c = '<';
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	for (i = 0; i < nid && (u_char *)io < snapend; ++io, ++i) {
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		printf("%c%s:%u",
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		    c, ipaddr_string(&io->id), (u_int32_t)ntohl(io->off));
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		c = ',';
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	}
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	if (i >= nid) {
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		printf(">");
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		return (0);
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	}
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	return (-1);
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}
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static int
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wb_rreq(const struct pkt_rreq *rreq, u_int len)
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{
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	printf(" wb-rreq:");
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	if (len < sizeof(*rreq) || (u_char *)(rreq + 1) > snapend)
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		return (-1);
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	printf(" please repair %s %s:%u<%u:%u>",
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	       ipaddr_string(&rreq->pr_id),
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	       ipaddr_string(&rreq->pr_page.p_sid),
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	       (u_int32_t)ntohl(rreq->pr_page.p_uid),
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	       (u_int32_t)ntohl(rreq->pr_sseq),
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	       (u_int32_t)ntohl(rreq->pr_eseq));
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	return (0);
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}
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static int
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wb_preq(const struct pkt_preq *preq, u_int len)
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{
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	printf(" wb-preq:");
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	if (len < sizeof(*preq) || (u_char *)(preq + 1) > snapend)
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		return (-1);
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	printf(" need %u/%s:%u",
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	       (u_int32_t)ntohl(preq->pp_low),
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	       ipaddr_string(&preq->pp_page.p_sid),
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	       (u_int32_t)ntohl(preq->pp_page.p_uid));
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	return (0);
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}
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static int
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wb_prep(const struct pkt_prep *prep, u_int len)
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{
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	int n;
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	const struct pgstate *ps;
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	const u_char *ep = snapend;
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	printf(" wb-prep:");
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	if (len < sizeof(*prep)) {
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		return (-1);
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	}
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	n = ntohl(prep->pp_n);
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	ps = (const struct pgstate *)(prep + 1);
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	while (--n >= 0 && (u_char *)ps < ep) {
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		const struct id_off *io, *ie;
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		char c = '<';
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		printf(" %u/%s:%u",
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		    (u_int32_t)ntohl(ps->slot),
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		    ipaddr_string(&ps->page.p_sid),
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		    (u_int32_t)ntohl(ps->page.p_uid));
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		io = (struct id_off *)(ps + 1);
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		for (ie = io + ps->nid; io < ie && (u_char *)io < ep; ++io) {
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			printf("%c%s:%u", c, ipaddr_string(&io->id),
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			    (u_int32_t)ntohl(io->off));
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			c = ',';
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		}
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		printf(">");
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		ps = (struct pgstate *)io;
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	}
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	return ((u_char *)ps <= ep? 0 : -1);
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}
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char *dopstr[] = {
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	"dop-0!",
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	"dop-1!",
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	"RECT",
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	"LINE",
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	"ML",
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	"DEL",
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	"XFORM",
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	"ELL",
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	"CHAR",
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	"STR",
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	"NOP",
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	"PSCODE",
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	"PSCOMP",
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	"REF",
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	"SKIP",
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	"HOLE",
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};
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static int
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wb_dops(const struct dophdr *dh, u_int32_t ss, u_int32_t es)
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{
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	printf(" <");
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	for ( ; ss <= es; ++ss) {
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		int t = dh->dh_type;
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		if (t > DT_MAXTYPE)
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			printf(" dop-%d!", t);
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		else {
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			printf(" %s", dopstr[t]);
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			if (t == DT_SKIP || t == DT_HOLE) {
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				int ts = ntohl(dh->dh_ts);
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				printf("%d", ts - ss + 1);
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				if (ss > ts || ts > es) {
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					printf("[|]");
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					if (ts < ss)
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						return (0);
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				}
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				ss = ts;
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			}
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		}
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		dh = DOP_NEXT(dh);
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		if ((u_char *)dh > snapend) {
324
			printf("[|wb]");
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			break;
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		}
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	}
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	printf(" >");
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	return (0);
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}
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static int
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wb_rrep(const struct pkt_rrep *rrep, u_int len)
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{
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	const struct pkt_dop *dop = &rrep->pr_dop;
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	printf(" wb-rrep:");
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	len -= sizeof(*rrep);
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	if ((u_char *)(rrep + 1) > snapend)
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		return (-1);
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	printf(" for %s %s:%u<%u:%u>",
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	    ipaddr_string(&rrep->pr_id),
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	    ipaddr_string(&dop->pd_page.p_sid),
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	    (u_int32_t)ntohl(dop->pd_page.p_uid),
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	    (u_int32_t)ntohl(dop->pd_sseq),
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	    (u_int32_t)ntohl(dop->pd_eseq));
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	if (vflag)
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		return (wb_dops((const struct dophdr *)(dop + 1),
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		    ntohl(dop->pd_sseq), ntohl(dop->pd_eseq)));
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	return (0);
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}
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static int
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wb_drawop(const struct pkt_dop *dop, u_int len)
357
{
358
	printf(" wb-dop:");
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	len -= sizeof(*dop);
360
	if ((u_char *)(dop + 1) > snapend)
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		return (-1);
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363
	printf(" %s:%u<%u:%u>",
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	    ipaddr_string(&dop->pd_page.p_sid),
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	    (u_int32_t)ntohl(dop->pd_page.p_uid),
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	    (u_int32_t)ntohl(dop->pd_sseq),
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	    (u_int32_t)ntohl(dop->pd_eseq));
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	if (vflag)
370
		return (wb_dops((const struct dophdr *)(dop + 1),
371
				ntohl(dop->pd_sseq), ntohl(dop->pd_eseq)));
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	return (0);
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}
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/*
376
 * Print whiteboard multicast packets.
377
 */
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void
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wb_print(const void *hdr, u_int len)
380
{
381
	const struct pkt_hdr *ph;
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383
	ph = (const struct pkt_hdr *)hdr;
384
	len -= sizeof(*ph);
385
	if ((u_char *)(ph + 1) <= snapend) {
386
		if (ph->ph_flags)
387
			printf("*");
388
		switch (ph->ph_type) {
389
390
		case PT_KILL:
391
			printf(" wb-kill");
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			return;
393
394
		case PT_ID:
395
			if (wb_id((struct pkt_id *)(ph + 1), len) >= 0)
396
				return;
397
			break;
398
399
		case PT_RREQ:
400
			if (wb_rreq((struct pkt_rreq *)(ph + 1), len) >= 0)
401
				return;
402
			break;
403
404
		case PT_RREP:
405
			if (wb_rrep((struct pkt_rrep *)(ph + 1), len) >= 0)
406
				return;
407
			break;
408
409
		case PT_DRAWOP:
410
			if (wb_drawop((struct pkt_dop *)(ph + 1), len) >= 0)
411
				return;
412
			break;
413
414
		case PT_PREQ:
415
			if (wb_preq((struct pkt_preq *)(ph + 1), len) >= 0)
416
				return;
417
			break;
418
419
		case PT_PREP:
420
			if (wb_prep((struct pkt_prep *)(ph + 1), len) >= 0)
421
				return;
422
			break;
423
424
		default:
425
			printf(" wb-%d!", ph->ph_type);
426
			return;
427
		}
428
	}
429
	printf("[|wb]");
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}