X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/e070cf232ffadbdbbca68b132ef369675890e566..refs/heads/tcpdump-4.9:/print-arcnet.c diff --git a/print-arcnet.c b/print-arcnet.c index 30e42a81..abc19b80 100644 --- a/print-arcnet.c +++ b/print-arcnet.c @@ -20,27 +20,91 @@ * * From: NetBSD: print-arcnet.c,v 1.2 2000/04/24 13:02:28 itojun Exp */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-arcnet.c,v 1.11 2002-12-18 08:53:19 guy Exp $ (LBL)"; -#endif + +/* \summary: Attached Resource Computer NETwork (ARCNET) printer */ #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include +#include + +#include "netdissect.h" +#include "extract.h" + +/* + * from: NetBSD: if_arc.h,v 1.13 1999/11/19 20:41:19 thorpej Exp + */ + +/* + * Structure of a 2.5MB/s Arcnet header on the BSDs, + * as given to interface code. + */ +struct arc_header { + uint8_t arc_shost; + uint8_t arc_dhost; + uint8_t arc_type; + /* + * only present for newstyle encoding with LL fragmentation. + * Don't use sizeof(anything), use ARC_HDR{,NEW}LEN instead. + */ + uint8_t arc_flag; + uint16_t arc_seqid; + + /* + * only present in exception packets (arc_flag == 0xff) + */ + uint8_t arc_type2; /* same as arc_type */ + uint8_t arc_flag2; /* real flag value */ + uint16_t arc_seqid2; /* real seqid value */ +}; + +#define ARC_HDRLEN 3 +#define ARC_HDRNEWLEN 6 +#define ARC_HDRNEWLEN_EXC 10 + +/* RFC 1051 */ +#define ARCTYPE_IP_OLD 240 /* IP protocol */ +#define ARCTYPE_ARP_OLD 241 /* address resolution protocol */ -#include -#include +/* RFC 1201 */ +#define ARCTYPE_IP 212 /* IP protocol */ +#define ARCTYPE_ARP 213 /* address resolution protocol */ +#define ARCTYPE_REVARP 214 /* reverse addr resolution protocol */ -#include "interface.h" -#include "arcnet.h" +#define ARCTYPE_ATALK 221 /* Appletalk */ +#define ARCTYPE_BANIAN 247 /* Banyan Vines */ +#define ARCTYPE_IPX 250 /* Novell IPX */ -int arcnet_encap_print(u_char arctype, const u_char *p, +#define ARCTYPE_INET6 0xc4 /* IPng */ +#define ARCTYPE_DIAGNOSE 0x80 /* as per ANSI/ATA 878.1 */ + +/* + * Structure of a 2.5MB/s Arcnet header on Linux. Linux has + * an extra "offset" field when given to interface code, and + * never presents packets that look like exception frames. + */ +struct arc_linux_header { + uint8_t arc_shost; + uint8_t arc_dhost; + uint16_t arc_offset; + uint8_t arc_type; + /* + * only present for newstyle encoding with LL fragmentation. + * Don't use sizeof(anything), use ARC_LINUX_HDR{,NEW}LEN + * instead. + */ + uint8_t arc_flag; + uint16_t arc_seqid; +}; + +#define ARC_LINUX_HDRLEN 5 +#define ARC_LINUX_HDRNEWLEN 8 + +static int arcnet_encap_print(netdissect_options *, u_char arctype, const u_char *p, u_int length, u_int caplen); -struct tok arctypemap[] = { +static const struct tok arctypemap[] = { { ARCTYPE_IP_OLD, "oldip" }, { ARCTYPE_ARP_OLD, "oldarp" }, { ARCTYPE_IP, "ip" }, @@ -55,7 +119,8 @@ struct tok arctypemap[] = { }; static inline void -arcnet_print(const u_char *bp, u_int length, int phds, int flag, u_int seqid) +arcnet_print(netdissect_options *ndo, const u_char *bp, u_int length, int phds, + int flag, u_int seqid) { const struct arc_header *ap; const char *arctypename; @@ -64,50 +129,50 @@ arcnet_print(const u_char *bp, u_int length, int phds, int flag, u_int seqid) ap = (const struct arc_header *)bp; - if (qflag) { - (void)printf("%02x %02x %d: ", + if (ndo->ndo_qflag) { + ND_PRINT((ndo, "%02x %02x %d: ", ap->arc_shost, ap->arc_dhost, - length); + length)); return; } arctypename = tok2str(arctypemap, "%02x", ap->arc_type); if (!phds) { - (void)printf("%02x %02x %s %d: ", + ND_PRINT((ndo, "%02x %02x %s %d: ", ap->arc_shost, ap->arc_dhost, arctypename, - length); + length)); return; } if (flag == 0) { - (void)printf("%02x %02x %s seqid %04x %d: ", + ND_PRINT((ndo, "%02x %02x %s seqid %04x %d: ", ap->arc_shost, ap->arc_dhost, arctypename, seqid, - length); + length)); return; } if (flag & 1) - (void)printf("%02x %02x %s seqid %04x " + ND_PRINT((ndo, "%02x %02x %s seqid %04x " "(first of %d fragments) %d: ", ap->arc_shost, ap->arc_dhost, arctypename, seqid, - (flag + 3) / 2, length); + (flag + 3) / 2, length)); else - (void)printf("%02x %02x %s seqid %04x " + ND_PRINT((ndo, "%02x %02x %s seqid %04x " "(fragment %d) %d: ", ap->arc_shost, ap->arc_dhost, arctypename, seqid, - flag/2 + 1, length); + flag/2 + 1, length)); } /* * This is the top level routine of the printer. 'p' points * to the ARCNET header of the packet, 'h->ts' is the timestamp, - * 'h->length' is the length of the packet off the wire, and 'h->caplen' + * 'h->len' is the length of the packet off the wire, and 'h->caplen' * is the number of bytes actually captured. */ -void -arcnet_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p) +u_int +arcnet_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) { u_int caplen = h->caplen; u_int length = h->len; @@ -117,12 +182,9 @@ arcnet_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p) u_int seqid = 0; u_char arc_type; - ++infodelay; - ts_print(&h->ts); - - if (caplen < ARC_HDRLEN) { - printf("[|arcnet]"); - goto out; + if (caplen < ARC_HDRLEN || length < ARC_HDRLEN) { + ND_PRINT((ndo, "[|arcnet]")); + return (caplen); } ap = (const struct arc_header *)p; @@ -141,60 +203,109 @@ arcnet_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p) } if (phds) { - if (caplen < ARC_HDRNEWLEN) { - arcnet_print(p, length, 0, 0, 0); - printf("[|phds]"); - goto out; + if (caplen < ARC_HDRNEWLEN || length < ARC_HDRNEWLEN) { + arcnet_print(ndo, p, length, 0, 0, 0); + ND_PRINT((ndo, "[|phds]")); + return (caplen); } if (ap->arc_flag == 0xff) { - if (caplen < ARC_HDRNEWLEN_EXC) { - arcnet_print(p, length, 0, 0, 0); - printf("[|phds extended]"); - goto out; + if (caplen < ARC_HDRNEWLEN_EXC || length < ARC_HDRNEWLEN_EXC) { + arcnet_print(ndo, p, length, 0, 0, 0); + ND_PRINT((ndo, "[|phds extended]")); + return (caplen); } flag = ap->arc_flag2; - seqid = ap->arc_seqid2; + seqid = EXTRACT_16BITS(&ap->arc_seqid2); archdrlen = ARC_HDRNEWLEN_EXC; } else { flag = ap->arc_flag; - seqid = ap->arc_seqid; + seqid = EXTRACT_16BITS(&ap->arc_seqid); archdrlen = ARC_HDRNEWLEN; } } - if (eflag) - arcnet_print(p, length, phds, flag, seqid); + if (ndo->ndo_eflag) + arcnet_print(ndo, p, length, phds, flag, seqid); /* - * Some printers want to check that they're not walking off the - * end of the packet. - * Rather than pass it all the way down, we set this global. + * Go past the ARCNET header. */ - snapend = p + caplen; - length -= archdrlen; caplen -= archdrlen; p += archdrlen; - if (phds && flag && (flag & 1) == 0) - goto out2; + if (phds && flag && (flag & 1) == 0) { + /* + * This is a middle fragment. + */ + return (archdrlen); + } + + if (!arcnet_encap_print(ndo, arc_type, p, length, caplen)) + ND_DEFAULTPRINT(p, caplen); + + return (archdrlen); +} + +/* + * This is the top level routine of the printer. 'p' points + * to the ARCNET header of the packet, 'h->ts' is the timestamp, + * 'h->len' is the length of the packet off the wire, and 'h->caplen' + * is the number of bytes actually captured. It is quite similar + * to the non-Linux style printer except that Linux doesn't ever + * supply packets that look like exception frames, it always supplies + * reassembled packets rather than raw frames, and headers have an + * extra "offset" field between the src/dest and packet type. + */ +u_int +arcnet_linux_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) +{ + u_int caplen = h->caplen; + u_int length = h->len; + const struct arc_linux_header *ap; + + int archdrlen = 0; + u_char arc_type; - if (!arcnet_encap_print(arc_type, p, length, caplen)) { - default_print(p, caplen); - goto out; + if (caplen < ARC_LINUX_HDRLEN || length < ARC_LINUX_HDRLEN) { + ND_PRINT((ndo, "[|arcnet]")); + return (caplen); } - out2: - if (xflag) - default_print(p, caplen); + ap = (const struct arc_linux_header *)p; + arc_type = ap->arc_type; - out: - putchar('\n'); - --infodelay; - if (infoprint) - info(0); + switch (arc_type) { + default: + archdrlen = ARC_LINUX_HDRNEWLEN; + if (caplen < ARC_LINUX_HDRNEWLEN || length < ARC_LINUX_HDRNEWLEN) { + ND_PRINT((ndo, "[|arcnet]")); + return (caplen); + } + break; + case ARCTYPE_IP_OLD: + case ARCTYPE_ARP_OLD: + case ARCTYPE_DIAGNOSE: + archdrlen = ARC_LINUX_HDRLEN; + break; + } + + if (ndo->ndo_eflag) + arcnet_print(ndo, p, length, 0, 0, 0); + + /* + * Go past the ARCNET header. + */ + length -= archdrlen; + caplen -= archdrlen; + p += archdrlen; + + if (!arcnet_encap_print(ndo, arc_type, p, length, caplen)) + ND_DEFAULTPRINT(p, caplen); + + return (archdrlen); } /* @@ -205,36 +316,45 @@ arcnet_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p) */ -int -arcnet_encap_print(u_char arctype, const u_char *p, +static int +arcnet_encap_print(netdissect_options *ndo, u_char arctype, const u_char *p, u_int length, u_int caplen) { switch (arctype) { case ARCTYPE_IP_OLD: case ARCTYPE_IP: - ip_print(p, length); + ip_print(ndo, p, length); return (1); -#ifdef INET6 case ARCTYPE_INET6: - ip6_print(p, length); + ip6_print(ndo, p, length); return (1); -#endif /*INET6*/ case ARCTYPE_ARP_OLD: case ARCTYPE_ARP: case ARCTYPE_REVARP: - arp_print(p, length, caplen); + arp_print(ndo, p, length, caplen); return (1); case ARCTYPE_ATALK: /* XXX was this ever used? */ - if (vflag) - fputs("et1 ", stdout); - atalk_print(p, length); + if (ndo->ndo_vflag) + ND_PRINT((ndo, "et1 ")); + atalk_print(ndo, p, length); + return (1); + + case ARCTYPE_IPX: + ipx_print(ndo, p, length); return (1); default: return (0); } } + +/* + * Local Variables: + * c-style: bsd + * End: + */ +