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-rw-r--r--print-atalk.c701
1 files changed, 701 insertions, 0 deletions
diff --git a/print-atalk.c b/print-atalk.c
new file mode 100644
index 0000000..d9f86c7
--- /dev/null
+++ b/print-atalk.c
@@ -0,0 +1,701 @@
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
+ * 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: AppleTalk printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "ethertype.h"
+#include "extract.h"
+#include "appletalk.h"
+
+
+static const struct tok type2str[] = {
+ { ddpRTMP, "rtmp" },
+ { ddpRTMPrequest, "rtmpReq" },
+ { ddpECHO, "echo" },
+ { ddpIP, "IP" },
+ { ddpARP, "ARP" },
+ { ddpKLAP, "KLAP" },
+ { 0, NULL }
+};
+
+struct aarp {
+ nd_uint16_t htype, ptype;
+ nd_uint8_t halen, palen;
+ nd_uint16_t op;
+ nd_mac_addr hsaddr;
+ uint8_t psaddr[4];
+ nd_mac_addr hdaddr;
+ uint8_t pdaddr[4];
+};
+
+static void atp_print(netdissect_options *, const struct atATP *, u_int);
+static void atp_bitmap_print(netdissect_options *, u_char);
+static void nbp_print(netdissect_options *, const struct atNBP *, u_int, u_short, u_char, u_char);
+static const struct atNBPtuple *nbp_tuple_print(netdissect_options *ndo, const struct atNBPtuple *,
+ const u_char *,
+ u_short, u_char, u_char);
+static const struct atNBPtuple *nbp_name_print(netdissect_options *, const struct atNBPtuple *,
+ const u_char *);
+static const char *ataddr_string(netdissect_options *, u_short, u_char);
+static void ddp_print(netdissect_options *, const u_char *, u_int, u_int, u_short, u_char, u_char);
+static const char *ddpskt_string(netdissect_options *, u_int);
+
+/*
+ * Print LLAP packets received on a physical LocalTalk interface.
+ */
+void
+ltalk_if_print(netdissect_options *ndo,
+ const struct pcap_pkthdr *h, const u_char *p)
+{
+ u_int hdrlen;
+
+ ndo->ndo_protocol = "ltalk";
+ hdrlen = llap_print(ndo, p, h->len);
+ if (hdrlen == 0) {
+ /* Cut short by the snapshot length. */
+ ndo->ndo_ll_hdr_len += h->caplen;
+ return;
+ }
+ ndo->ndo_ll_hdr_len += hdrlen;
+}
+
+/*
+ * Print AppleTalk LLAP packets.
+ */
+u_int
+llap_print(netdissect_options *ndo,
+ const u_char *bp, u_int length)
+{
+ const struct LAP *lp;
+ const struct atDDP *dp;
+ const struct atShortDDP *sdp;
+ u_short snet;
+ u_int hdrlen;
+
+ ndo->ndo_protocol = "llap";
+ if (length < sizeof(*lp)) {
+ ND_PRINT(" [|llap %u]", length);
+ return (length);
+ }
+ if (!ND_TTEST_LEN(bp, sizeof(*lp))) {
+ nd_print_trunc(ndo);
+ return (0); /* cut short by the snapshot length */
+ }
+ lp = (const struct LAP *)bp;
+ bp += sizeof(*lp);
+ length -= sizeof(*lp);
+ hdrlen = sizeof(*lp);
+ switch (GET_U_1(lp->type)) {
+
+ case lapShortDDP:
+ if (length < ddpSSize) {
+ ND_PRINT(" [|sddp %u]", length);
+ return (length);
+ }
+ if (!ND_TTEST_LEN(bp, ddpSSize)) {
+ ND_PRINT(" [|sddp]");
+ return (0); /* cut short by the snapshot length */
+ }
+ sdp = (const struct atShortDDP *)bp;
+ ND_PRINT("%s.%s",
+ ataddr_string(ndo, 0, GET_U_1(lp->src)),
+ ddpskt_string(ndo, GET_U_1(sdp->srcSkt)));
+ ND_PRINT(" > %s.%s:",
+ ataddr_string(ndo, 0, GET_U_1(lp->dst)),
+ ddpskt_string(ndo, GET_U_1(sdp->dstSkt)));
+ bp += ddpSSize;
+ length -= ddpSSize;
+ hdrlen += ddpSSize;
+ ddp_print(ndo, bp, length, GET_U_1(sdp->type), 0,
+ GET_U_1(lp->src), GET_U_1(sdp->srcSkt));
+ break;
+
+ case lapDDP:
+ if (length < ddpSize) {
+ ND_PRINT(" [|ddp %u]", length);
+ return (length);
+ }
+ if (!ND_TTEST_LEN(bp, ddpSize)) {
+ ND_PRINT(" [|ddp]");
+ return (0); /* cut short by the snapshot length */
+ }
+ dp = (const struct atDDP *)bp;
+ snet = GET_BE_U_2(dp->srcNet);
+ ND_PRINT("%s.%s",
+ ataddr_string(ndo, snet, GET_U_1(dp->srcNode)),
+ ddpskt_string(ndo, GET_U_1(dp->srcSkt)));
+ ND_PRINT(" > %s.%s:",
+ ataddr_string(ndo, GET_BE_U_2(dp->dstNet), GET_U_1(dp->dstNode)),
+ ddpskt_string(ndo, GET_U_1(dp->dstSkt)));
+ bp += ddpSize;
+ length -= ddpSize;
+ hdrlen += ddpSize;
+ ddp_print(ndo, bp, length, GET_U_1(dp->type), snet,
+ GET_U_1(dp->srcNode), GET_U_1(dp->srcSkt));
+ break;
+
+#ifdef notdef
+ case lapKLAP:
+ klap_print(bp, length);
+ break;
+#endif
+
+ default:
+ ND_PRINT("%u > %u at-lap#%u %u",
+ GET_U_1(lp->src), GET_U_1(lp->dst), GET_U_1(lp->type),
+ length);
+ break;
+ }
+ return (hdrlen);
+}
+
+/*
+ * Print EtherTalk/TokenTalk packets (or FDDITalk, or whatever it's called
+ * when it runs over FDDI; yes, I've seen FDDI captures with AppleTalk
+ * packets in them).
+ */
+void
+atalk_print(netdissect_options *ndo,
+ const u_char *bp, u_int length)
+{
+ const struct atDDP *dp;
+ u_short snet;
+
+ ndo->ndo_protocol = "atalk";
+ if(!ndo->ndo_eflag)
+ ND_PRINT("AT ");
+
+ if (length < ddpSize) {
+ ND_PRINT(" [|ddp %u]", length);
+ return;
+ }
+ if (!ND_TTEST_LEN(bp, ddpSize)) {
+ ND_PRINT(" [|ddp]");
+ return;
+ }
+ dp = (const struct atDDP *)bp;
+ snet = GET_BE_U_2(dp->srcNet);
+ ND_PRINT("%s.%s", ataddr_string(ndo, snet, GET_U_1(dp->srcNode)),
+ ddpskt_string(ndo, GET_U_1(dp->srcSkt)));
+ ND_PRINT(" > %s.%s: ",
+ ataddr_string(ndo, GET_BE_U_2(dp->dstNet), GET_U_1(dp->dstNode)),
+ ddpskt_string(ndo, GET_U_1(dp->dstSkt)));
+ bp += ddpSize;
+ length -= ddpSize;
+ ddp_print(ndo, bp, length, GET_U_1(dp->type), snet,
+ GET_U_1(dp->srcNode), GET_U_1(dp->srcSkt));
+}
+
+/* XXX should probably pass in the snap header and do checks like arp_print() */
+void
+aarp_print(netdissect_options *ndo,
+ const u_char *bp, u_int length)
+{
+ const struct aarp *ap;
+
+#define AT(member) ataddr_string(ndo, (ap->member[1]<<8)|ap->member[2],ap->member[3])
+
+ ndo->ndo_protocol = "aarp";
+ ND_PRINT("aarp ");
+ ap = (const struct aarp *)bp;
+ if (!ND_TTEST_SIZE(ap)) {
+ /* Just bail if we don't have the whole chunk. */
+ nd_print_trunc(ndo);
+ return;
+ }
+ if (length < sizeof(*ap)) {
+ ND_PRINT(" [|aarp %u]", length);
+ return;
+ }
+ if (GET_BE_U_2(ap->htype) == 1 &&
+ GET_BE_U_2(ap->ptype) == ETHERTYPE_ATALK &&
+ GET_U_1(ap->halen) == MAC_ADDR_LEN && GET_U_1(ap->palen) == 4)
+ switch (GET_BE_U_2(ap->op)) {
+
+ case 1: /* request */
+ ND_PRINT("who-has %s tell %s", AT(pdaddr), AT(psaddr));
+ return;
+
+ case 2: /* response */
+ ND_PRINT("reply %s is-at %s", AT(psaddr), GET_ETHERADDR_STRING(ap->hsaddr));
+ return;
+
+ case 3: /* probe (oy!) */
+ ND_PRINT("probe %s tell %s", AT(pdaddr), AT(psaddr));
+ return;
+ }
+ ND_PRINT("len %u op %u htype %u ptype %#x halen %u palen %u",
+ length, GET_BE_U_2(ap->op), GET_BE_U_2(ap->htype),
+ GET_BE_U_2(ap->ptype), GET_U_1(ap->halen), GET_U_1(ap->palen));
+}
+
+/*
+ * Print AppleTalk Datagram Delivery Protocol packets.
+ */
+static void
+ddp_print(netdissect_options *ndo,
+ const u_char *bp, u_int length, u_int t,
+ u_short snet, u_char snode, u_char skt)
+{
+
+ switch (t) {
+
+ case ddpNBP:
+ nbp_print(ndo, (const struct atNBP *)bp, length, snet, snode, skt);
+ break;
+
+ case ddpATP:
+ atp_print(ndo, (const struct atATP *)bp, length);
+ break;
+
+ case ddpEIGRP:
+ eigrp_print(ndo, bp, length);
+ break;
+
+ default:
+ ND_PRINT(" at-%s %u", tok2str(type2str, NULL, t), length);
+ break;
+ }
+}
+
+static void
+atp_print(netdissect_options *ndo,
+ const struct atATP *ap, u_int length)
+{
+ uint8_t control;
+ uint32_t data;
+
+ if ((const u_char *)(ap + 1) > ndo->ndo_snapend) {
+ /* Just bail if we don't have the whole chunk. */
+ nd_print_trunc(ndo);
+ return;
+ }
+ if (length < sizeof(*ap)) {
+ ND_PRINT(" [|atp %u]", length);
+ return;
+ }
+ length -= sizeof(*ap);
+ control = GET_U_1(ap->control);
+ switch (control & 0xc0) {
+
+ case atpReqCode:
+ ND_PRINT(" atp-req%s %u",
+ control & atpXO? " " : "*",
+ GET_BE_U_2(ap->transID));
+
+ atp_bitmap_print(ndo, GET_U_1(ap->bitmap));
+
+ if (length != 0)
+ ND_PRINT(" [len=%u]", length);
+
+ switch (control & (atpEOM|atpSTS)) {
+ case atpEOM:
+ ND_PRINT(" [EOM]");
+ break;
+ case atpSTS:
+ ND_PRINT(" [STS]");
+ break;
+ case atpEOM|atpSTS:
+ ND_PRINT(" [EOM,STS]");
+ break;
+ }
+ break;
+
+ case atpRspCode:
+ ND_PRINT(" atp-resp%s%u:%u (%u)",
+ control & atpEOM? "*" : " ",
+ GET_BE_U_2(ap->transID), GET_U_1(ap->bitmap),
+ length);
+ switch (control & (atpXO|atpSTS)) {
+ case atpXO:
+ ND_PRINT(" [XO]");
+ break;
+ case atpSTS:
+ ND_PRINT(" [STS]");
+ break;
+ case atpXO|atpSTS:
+ ND_PRINT(" [XO,STS]");
+ break;
+ }
+ break;
+
+ case atpRelCode:
+ ND_PRINT(" atp-rel %u", GET_BE_U_2(ap->transID));
+
+ atp_bitmap_print(ndo, GET_U_1(ap->bitmap));
+
+ /* length should be zero */
+ if (length)
+ ND_PRINT(" [len=%u]", length);
+
+ /* there shouldn't be any control flags */
+ if (control & (atpXO|atpEOM|atpSTS)) {
+ char c = '[';
+ if (control & atpXO) {
+ ND_PRINT("%cXO", c);
+ c = ',';
+ }
+ if (control & atpEOM) {
+ ND_PRINT("%cEOM", c);
+ c = ',';
+ }
+ if (control & atpSTS) {
+ ND_PRINT("%cSTS", c);
+ }
+ ND_PRINT("]");
+ }
+ break;
+
+ default:
+ ND_PRINT(" atp-0x%x %u (%u)", control,
+ GET_BE_U_2(ap->transID), length);
+ break;
+ }
+ data = GET_BE_U_4(ap->userData);
+ if (data != 0)
+ ND_PRINT(" 0x%x", data);
+}
+
+static void
+atp_bitmap_print(netdissect_options *ndo,
+ u_char bm)
+{
+ u_int i;
+
+ /*
+ * The '& 0xff' below is needed for compilers that want to sign
+ * extend a u_char, which is the case with the Ultrix compiler.
+ * (gcc is smart enough to eliminate it, at least on the Sparc).
+ */
+ if ((bm + 1) & (bm & 0xff)) {
+ char c = '<';
+ for (i = 0; bm; ++i) {
+ if (bm & 1) {
+ ND_PRINT("%c%u", c, i);
+ c = ',';
+ }
+ bm >>= 1;
+ }
+ ND_PRINT(">");
+ } else {
+ for (i = 0; bm; ++i)
+ bm >>= 1;
+ if (i > 1)
+ ND_PRINT("<0-%u>", i - 1);
+ else
+ ND_PRINT("<0>");
+ }
+}
+
+static void
+nbp_print(netdissect_options *ndo,
+ const struct atNBP *np, u_int length, u_short snet,
+ u_char snode, u_char skt)
+{
+ const struct atNBPtuple *tp =
+ (const struct atNBPtuple *)((const u_char *)np + nbpHeaderSize);
+ uint8_t control;
+ u_int i;
+ const u_char *ep;
+
+ if (length < nbpHeaderSize) {
+ ND_PRINT(" truncated-nbp %u", length);
+ return;
+ }
+
+ length -= nbpHeaderSize;
+ if (length < 8) {
+ /* must be room for at least one tuple */
+ ND_PRINT(" truncated-nbp %u", length + nbpHeaderSize);
+ return;
+ }
+ /* ep points to end of available data */
+ ep = ndo->ndo_snapend;
+ if ((const u_char *)tp > ep) {
+ nd_print_trunc(ndo);
+ return;
+ }
+ control = GET_U_1(np->control);
+ switch (i = (control & 0xf0)) {
+
+ case nbpBrRq:
+ case nbpLkUp:
+ ND_PRINT(i == nbpLkUp? " nbp-lkup %u:":" nbp-brRq %u:",
+ GET_U_1(np->id));
+ if ((const u_char *)(tp + 1) > ep) {
+ nd_print_trunc(ndo);
+ return;
+ }
+ (void)nbp_name_print(ndo, tp, ep);
+ /*
+ * look for anomalies: the spec says there can only
+ * be one tuple, the address must match the source
+ * address and the enumerator should be zero.
+ */
+ if ((control & 0xf) != 1)
+ ND_PRINT(" [ntup=%u]", control & 0xf);
+ if (GET_U_1(tp->enumerator))
+ ND_PRINT(" [enum=%u]", GET_U_1(tp->enumerator));
+ if (GET_BE_U_2(tp->net) != snet ||
+ GET_U_1(tp->node) != snode ||
+ GET_U_1(tp->skt) != skt)
+ ND_PRINT(" [addr=%s.%u]",
+ ataddr_string(ndo, GET_BE_U_2(tp->net),
+ GET_U_1(tp->node)),
+ GET_U_1(tp->skt));
+ break;
+
+ case nbpLkUpReply:
+ ND_PRINT(" nbp-reply %u:", GET_U_1(np->id));
+
+ /* print each of the tuples in the reply */
+ for (i = control & 0xf; i != 0 && tp; i--)
+ tp = nbp_tuple_print(ndo, tp, ep, snet, snode, skt);
+ break;
+
+ default:
+ ND_PRINT(" nbp-0x%x %u (%u)", control, GET_U_1(np->id),
+ length);
+ break;
+ }
+}
+
+/* print a counted string */
+static const u_char *
+print_cstring(netdissect_options *ndo,
+ const u_char *cp, const u_char *ep)
+{
+ u_int length;
+
+ if (cp >= ep) {
+ nd_print_trunc(ndo);
+ return (0);
+ }
+ length = GET_U_1(cp);
+ cp++;
+
+ /* Spec says string can be at most 32 bytes long */
+ if (length > 32) {
+ ND_PRINT("[len=%u]", length);
+ return (0);
+ }
+ while (length != 0) {
+ if (cp >= ep) {
+ nd_print_trunc(ndo);
+ return (0);
+ }
+ fn_print_char(ndo, GET_U_1(cp));
+ cp++;
+ length--;
+ }
+ return (cp);
+}
+
+static const struct atNBPtuple *
+nbp_tuple_print(netdissect_options *ndo,
+ const struct atNBPtuple *tp, const u_char *ep,
+ u_short snet, u_char snode, u_char skt)
+{
+ const struct atNBPtuple *tpn;
+
+ if ((const u_char *)(tp + 1) > ep) {
+ nd_print_trunc(ndo);
+ return 0;
+ }
+ tpn = nbp_name_print(ndo, tp, ep);
+
+ /* if the enumerator isn't 1, print it */
+ if (GET_U_1(tp->enumerator) != 1)
+ ND_PRINT("(%u)", GET_U_1(tp->enumerator));
+
+ /* if the socket doesn't match the src socket, print it */
+ if (GET_U_1(tp->skt) != skt)
+ ND_PRINT(" %u", GET_U_1(tp->skt));
+
+ /* if the address doesn't match the src address, it's an anomaly */
+ if (GET_BE_U_2(tp->net) != snet ||
+ GET_U_1(tp->node) != snode)
+ ND_PRINT(" [addr=%s]",
+ ataddr_string(ndo, GET_BE_U_2(tp->net), GET_U_1(tp->node)));
+
+ return (tpn);
+}
+
+static const struct atNBPtuple *
+nbp_name_print(netdissect_options *ndo,
+ const struct atNBPtuple *tp, const u_char *ep)
+{
+ const u_char *cp = (const u_char *)tp + nbpTupleSize;
+
+ ND_PRINT(" ");
+
+ /* Object */
+ ND_PRINT("\"");
+ if ((cp = print_cstring(ndo, cp, ep)) != NULL) {
+ /* Type */
+ ND_PRINT(":");
+ if ((cp = print_cstring(ndo, cp, ep)) != NULL) {
+ /* Zone */
+ ND_PRINT("@");
+ if ((cp = print_cstring(ndo, cp, ep)) != NULL)
+ ND_PRINT("\"");
+ }
+ }
+ return ((const struct atNBPtuple *)cp);
+}
+
+
+#define HASHNAMESIZE 4096
+
+struct hnamemem {
+ u_int addr;
+ char *name;
+ struct hnamemem *nxt;
+};
+
+static struct hnamemem hnametable[HASHNAMESIZE];
+
+static const char *
+ataddr_string(netdissect_options *ndo,
+ u_short atnet, u_char athost)
+{
+ struct hnamemem *tp, *tp2;
+ u_int i = (atnet << 8) | athost;
+ char nambuf[256+1];
+ static int first = 1;
+ FILE *fp;
+
+ /*
+ * Are we doing address to name resolution?
+ */
+ if (!ndo->ndo_nflag) {
+ /*
+ * Yes. Have we tried to open and read an AppleTalk
+ * number to name map file?
+ */
+ if (!first) {
+ /*
+ * No; try to do so.
+ */
+ first = 0;
+ fp = fopen("/etc/atalk.names", "r");
+ if (fp != NULL) {
+ char line[256];
+ u_int i1, i2;
+
+ while (fgets(line, sizeof(line), fp)) {
+ if (line[0] == '\n' || line[0] == 0 ||
+ line[0] == '#')
+ continue;
+ if (sscanf(line, "%u.%u %256s", &i1,
+ &i2, nambuf) == 3)
+ /* got a hostname. */
+ i2 |= (i1 << 8);
+ else if (sscanf(line, "%u %256s", &i1,
+ nambuf) == 2)
+ /* got a net name */
+ i2 = (i1 << 8) | 255;
+ else
+ continue;
+
+ for (tp = &hnametable[i2 & (HASHNAMESIZE-1)];
+ tp->nxt; tp = tp->nxt)
+ ;
+ tp->addr = i2;
+ tp->nxt = newhnamemem(ndo);
+ tp->name = strdup(nambuf);
+ if (tp->name == NULL)
+ (*ndo->ndo_error)(ndo,
+ S_ERR_ND_MEM_ALLOC,
+ "%s: strdup(nambuf)", __func__);
+ }
+ fclose(fp);
+ }
+ }
+ }
+
+ /*
+ * Now try to look up the address in the table.
+ */
+ for (tp = &hnametable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
+ if (tp->addr == i)
+ return (tp->name);
+
+ /* didn't have the node name -- see if we've got the net name */
+ i |= 255;
+ for (tp2 = &hnametable[i & (HASHNAMESIZE-1)]; tp2->nxt; tp2 = tp2->nxt)
+ if (tp2->addr == i) {
+ tp->addr = (atnet << 8) | athost;
+ tp->nxt = newhnamemem(ndo);
+ (void)snprintf(nambuf, sizeof(nambuf), "%s.%u",
+ tp2->name, athost);
+ tp->name = strdup(nambuf);
+ if (tp->name == NULL)
+ (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+ "%s: strdup(nambuf)", __func__);
+ return (tp->name);
+ }
+
+ tp->addr = (atnet << 8) | athost;
+ tp->nxt = newhnamemem(ndo);
+ if (athost != 255)
+ (void)snprintf(nambuf, sizeof(nambuf), "%u.%u", atnet, athost);
+ else
+ (void)snprintf(nambuf, sizeof(nambuf), "%u", atnet);
+ tp->name = strdup(nambuf);
+ if (tp->name == NULL)
+ (*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
+ "%s: strdup(nambuf)", __func__);
+
+ return (tp->name);
+}
+
+static const struct tok skt2str[] = {
+ { rtmpSkt, "rtmp" }, /* routing table maintenance */
+ { nbpSkt, "nis" }, /* name info socket */
+ { echoSkt, "echo" }, /* AppleTalk echo protocol */
+ { zipSkt, "zip" }, /* zone info protocol */
+ { 0, NULL }
+};
+
+static const char *
+ddpskt_string(netdissect_options *ndo,
+ u_int skt)
+{
+ static char buf[8];
+
+ if (ndo->ndo_nflag) {
+ (void)snprintf(buf, sizeof(buf), "%u", skt);
+ return (buf);
+ }
+ return (tok2str(skt2str, "%u", skt));
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 05:58:09 +0000