diff options
Diffstat (limited to 'contrib/tcpdump/print-token.c')
-rw-r--r-- | contrib/tcpdump/print-token.c | 241 |
1 files changed, 134 insertions, 107 deletions
diff --git a/contrib/tcpdump/print-token.c b/contrib/tcpdump/print-token.c index 158d86a..748c4b6 100644 --- a/contrib/tcpdump/print-token.c +++ b/contrib/tcpdump/print-token.c @@ -20,85 +20,92 @@ * * Hacked version of print-ether.c Larry Lile <lile@stdio.com> * + * Further tweaked to more closely resemble print-fddi.c + * Guy Harris <guy@alum.mit.edu> + * * $FreeBSD$ */ #ifndef lint static const char rcsid[] = - "@(#) $Header: /home/ncvs/src/contrib/tcpdump/print-token.c,v 1.1 1999/02/20 11:17:55 julian Exp $"; + "@(#) $Header: /tcpdump/master/tcpdump/print-token.c,v 1.13 2001/09/18 15:46:37 fenner Exp $"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" #endif #include <sys/param.h> #include <sys/time.h> #include <sys/socket.h> -#if __STDC__ -struct mbuf; -struct rtentry; -#endif -#include <net/if.h> - -#include "token.h" - #include <netinet/in.h> -#include <net/ethernet.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <netinet/ip_var.h> -#include <netinet/udp.h> -#include <netinet/udp_var.h> -#include <netinet/tcp.h> -#include <netinet/tcpip.h> -#include <stdio.h> #include <pcap.h> +#include <stdio.h> +#include <string.h> #include "interface.h" #include "addrtoname.h" #include "ethertype.h" -#include "llc.h" -const u_char *packetp; -const u_char *snapend; +#include "ether.h" +#include "token.h" + +/* Extract src, dst addresses */ +static inline void +extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst) +{ + memcpy(fdst, (const char *)trp->token_dhost, 6); + memcpy(fsrc, (const char *)trp->token_shost, 6); +} +/* + * Print the TR MAC header + */ static inline void -token_print(register const u_char *bp, u_int length) +token_print(register const struct token_header *trp, register u_int length, + register const u_char *fsrc, register const u_char *fdst) { - register const struct token_header *tp; - register const struct llc *lp; - u_short ether_type; - - tp = (const struct token_header *)bp; - lp = (struct llc *)(bp + TOKEN_HDR_LEN); - - if (IS_SOURCE_ROUTED) { - tp->ether_shost[0] = tp->ether_shost[0] & 0x7f; - lp = (struct llc *)(bp + TOKEN_HDR_LEN + RIF_LENGTH); - } - - /* - * Ethertype on ethernet is a short, but ethertype in an llc-snap has - * been defined as 2 u_chars. This is a stupid little hack to fix - * this for now but something better should be done using ntohs() - * XXX - */ - ether_type = ((u_short)lp->ethertype[1] << 16) | lp->ethertype[0]; - - if (qflag) - (void)printf("%s %s %d: ", - etheraddr_string(ESRC(tp)), - etheraddr_string(EDST(tp)), - length); + const char *srcname, *dstname; + + srcname = etheraddr_string(fsrc); + dstname = etheraddr_string(fdst); + + if (vflag) + (void) printf("%02x %02x %s %s %d: ", + trp->token_ac, + trp->token_fc, + srcname, dstname, + length); else - (void)printf("%s %s %s %d: ", - etheraddr_string(ESRC(tp)), - etheraddr_string(EDST(tp)), - etherproto_string(ether_type), - length); + printf("%s %s %d: ", srcname, dstname, length); } +static const char *broadcast_indicator[] = { + "Non-Broadcast", "Non-Broadcast", + "Non-Broadcast", "Non-Broadcast", + "All-routes", "All-routes", + "Single-route", "Single-route" +}; + +static const char *direction[] = { + "Forward", "Backward" +}; + +static const char *largest_frame[] = { + "516", + "1500", + "2052", + "4472", + "8144", + "11407", + "17800", + "??" +}; + /* * This is the top level routine of the printer. 'p' is the points - * to the ether header of the packet, 'tvp' is the timestamp, + * to the TR header of the packet, 'tvp' is the timestamp, * 'length' is the length of the packet off the wire, and 'caplen' * is the number of bytes actually captured. */ @@ -107,83 +114,103 @@ token_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) { u_int caplen = h->caplen; u_int length = h->len; - struct token_header *tp; - u_short ether_type; + const struct token_header *trp; u_short extracted_ethertype; - u_int route_len = 0, seg; - struct llc *lp; + struct ether_header ehdr; + u_int route_len = 0, seg; - tp = (struct token_header *)p; + trp = (const struct token_header *)p; + ++infodelay; ts_print(&h->ts); - if (caplen < TOKEN_HDR_LEN) { + if (caplen < TOKEN_HDRLEN) { printf("[|token-ring]"); goto out; } - + /* + * Get the TR addresses into a canonical form + */ + extract_token_addrs(trp, (char*)ESRC(&ehdr), (char*)EDST(&ehdr)); /* * Some printers want to get back at the ethernet addresses, * and/or check that they're not walking off the end of the packet. * Rather than pass them all the way down, we set these globals. */ - tp = (struct token_header *)p; - - /* Adjust for source routing information in the MAC header */ - if (IS_SOURCE_ROUTED) { - - if (eflag) - token_print(p, length); - - route_len = RIF_LENGTH; - if (vflag) { - if (vflag > 1) - printf("ac %x fc %x ", tp->ac, tp->fc); - ether_type = ntohs((int)lp->ethertype); - - printf("%s ", broadcast_indicator[BROADCAST]); - printf("%s", direction[DIRECTION]); + snapend = p + caplen; + /* + * Actually, the only printers that use packetp are print-arp.c + * and print-bootp.c, and they assume that packetp points to an + * Ethernet header. The right thing to do is to fix them to know + * which link type is in use when they excavate. XXX + */ + packetp = (u_char *)&ehdr; + + /* Adjust for source routing information in the MAC header */ + if (IS_SOURCE_ROUTED(trp)) { + /* Clear source-routed bit */ + *ESRC(&ehdr) &= 0x7f; + + if (eflag) + token_print(trp, length, ESRC(&ehdr), EDST(&ehdr)); + + route_len = RIF_LENGTH(trp); + if (vflag) { + printf("%s ", broadcast_indicator[BROADCAST(trp)]); + printf("%s", direction[DIRECTION(trp)]); - for (seg = 0; seg < SEGMENT_COUNT; seg++) - printf(" [%d:%d]", RING_NUMBER(seg), BRIDGE_NUMBER(seg)); - } else { - printf("rt = %x", ntohs(tp->rcf)); + for (seg = 0; seg < SEGMENT_COUNT(trp); seg++) + printf(" [%d:%d]", RING_NUMBER(trp, seg), + BRIDGE_NUMBER(trp, seg)); + } else { + printf("rt = %x", ntohs(trp->token_rcf)); - for (seg = 0; seg < SEGMENT_COUNT; seg++) - printf(":%x", ntohs(tp->rseg[seg])); - } - printf(" (%s) ", largest_frame[LARGEST_FRAME]); - } else { - if (eflag) - token_print(p, length); - } - - /* Set pointer to llc header, adjusted for routing information */ - lp = (struct llc *)(p + TOKEN_HDR_LEN + route_len); - - packetp = p; - snapend = p + caplen; + for (seg = 0; seg < SEGMENT_COUNT(trp); seg++) + printf(":%x", ntohs(trp->token_rseg[seg])); + } + printf(" (%s) ", largest_frame[LARGEST_FRAME(trp)]); + } else { + if (eflag) + token_print(trp, length, ESRC(&ehdr), EDST(&ehdr)); + } - /* Skip over token ring MAC header */ - length -= TOKEN_HDR_LEN + route_len; - caplen -= TOKEN_HDR_LEN + route_len; - p += TOKEN_HDR_LEN + route_len; + /* Skip over token ring MAC header and routing information */ + length -= TOKEN_HDRLEN + route_len; + p += TOKEN_HDRLEN + route_len; + caplen -= TOKEN_HDRLEN + route_len; + /* Frame Control field determines interpretation of packet */ extracted_ethertype = 0; - /* Try to print the LLC-layer header & higher layers */ - if (llc_print(p, length, caplen, ESRC(tp), EDST(tp), &extracted_ethertype) == 0) { - /* ether_type not known, print raw packet */ - if (!eflag) - token_print((u_char *)tp, length); - if (extracted_ethertype) { - printf("(LLC %s) ", - etherproto_string(htons(extracted_ethertype))); + if (FRAME_TYPE(trp) == TOKEN_FC_LLC) { + /* Try to print the LLC-layer header & higher layers */ + if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr), + &extracted_ethertype) == 0) { + /* ether_type not known, print raw packet */ + if (!eflag) + token_print(trp, + length + TOKEN_HDRLEN + route_len, + ESRC(&ehdr), EDST(&ehdr)); + if (extracted_ethertype) { + printf("(LLC %s) ", + etherproto_string(htons(extracted_ethertype))); + } + if (!xflag && !qflag) + default_print(p, caplen); } + } else { + /* Some kinds of TR packet we cannot handle intelligently */ + /* XXX - dissect MAC packets if frame type is 0 */ + if (!eflag) + token_print(trp, length + TOKEN_HDRLEN + route_len, + ESRC(&ehdr), EDST(&ehdr)); if (!xflag && !qflag) default_print(p, caplen); } if (xflag) default_print(p, caplen); - out: +out: putchar('\n'); + --infodelay; + if (infoprint) + info(0); } |