Add CAP_FCNTL and use cap_fcntls_limit().

[tcpdump] / print-atm.c

diff --git a/print-atm.c b/print-atm.c
index 485f9e96d18e127845d07535d2c7c8f0d2c2c289..9361065937b2951190dd13bc6219db84d24ee2e6 100644 (file)
--- a/print-atm.c
+++ b/print-atm.c
@@ -18,137 +18,444 @@
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */

-#ifndef lint
-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.14 2000-09-23 08:03:33 guy Exp $ (LBL)";
-#endif

 
 

+#define NETDISSECT_REWORKED

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 

-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
+#include <tcpdump-stdinc.h>
+
+#include "interface.h"
+#include "extract.h"
+#include "addrtoname.h"
+#include "atm.h"
+#include "atmuni31.h"
+#include "llc.h"

 
 

-struct mbuf;
-struct rtentry;
-#include <net/if.h>
+static const char tstr[] = "[|atm]";

 
 

-#include <netinet/in.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>
+#define OAM_CRC10_MASK 0x3ff
+#define OAM_PAYLOAD_LEN 48
+#define OAM_FUNCTION_SPECIFIC_LEN 45 /* this excludes crc10 and cell-type/function-type */
+#define OAM_CELLTYPE_FUNCTYPE_LEN 1

 
 

-#include <stdio.h>
-#include <pcap.h>
+static const struct tok oam_f_values[] = {
+    { VCI_OAMF4SC, "OAM F4 (segment)" },
+    { VCI_OAMF4EC, "OAM F4 (end)" },
+    { 0, NULL }
+};

 
 

-#include "interface.h"
-#include "addrtoname.h"
-#include "ethertype.h"
+static const struct tok atm_pty_values[] = {
+    { 0x0, "user data, uncongested, SDU 0" },
+    { 0x1, "user data, uncongested, SDU 1" },
+    { 0x2, "user data, congested, SDU 0" },
+    { 0x3, "user data, congested, SDU 1" },
+    { 0x4, "VCC OAM F5 flow segment" },
+    { 0x5, "VCC OAM F5 flow end-to-end" },
+    { 0x6, "Traffic Control and resource Mgmt" },
+    { 0, NULL }
+};
+
+#define OAM_CELLTYPE_FM 0x1
+#define OAM_CELLTYPE_PM 0x2
+#define OAM_CELLTYPE_AD 0x8
+#define OAM_CELLTYPE_SM 0xf
+
+static const struct tok oam_celltype_values[] = {
+    { OAM_CELLTYPE_FM, "Fault Management" },
+    { OAM_CELLTYPE_PM, "Performance Management" },
+    { OAM_CELLTYPE_AD, "activate/deactivate" },
+    { OAM_CELLTYPE_SM, "System Management" },
+    { 0, NULL }
+};
+
+#define OAM_FM_FUNCTYPE_AIS       0x0
+#define OAM_FM_FUNCTYPE_RDI       0x1
+#define OAM_FM_FUNCTYPE_CONTCHECK 0x4
+#define OAM_FM_FUNCTYPE_LOOPBACK  0x8
+
+static const struct tok oam_fm_functype_values[] = {
+    { OAM_FM_FUNCTYPE_AIS, "AIS" },
+    { OAM_FM_FUNCTYPE_RDI, "RDI" },
+    { OAM_FM_FUNCTYPE_CONTCHECK, "Continuity Check" },
+    { OAM_FM_FUNCTYPE_LOOPBACK, "Loopback" },
+    { 0, NULL }
+};
+
+static const struct tok oam_pm_functype_values[] = {
+    { 0x0, "Forward Monitoring" },
+    { 0x1, "Backward Reporting" },
+    { 0x2, "Monitoring and Reporting" },
+    { 0, NULL }
+};
+
+static const struct tok oam_ad_functype_values[] = {
+    { 0x0, "Performance Monitoring" },
+    { 0x1, "Continuity Check" },
+    { 0, NULL }
+};
+
+#define OAM_FM_LOOPBACK_INDICATOR_MASK 0x1
+
+static const struct tok oam_fm_loopback_indicator_values[] = {
+    { 0x0, "Reply" },
+    { 0x1, "Request" },
+    { 0, NULL }
+};
+
+static const struct tok *oam_functype_values[16] = {
+    NULL,
+    oam_fm_functype_values, /* 1 */
+    oam_pm_functype_values, /* 2 */
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    oam_ad_functype_values, /* 8 */
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL
+};
+
+/*
+ * Print an RFC 1483 LLC-encapsulated ATM frame.
+ */
+static void
+atm_llc_print(netdissect_options *ndo,
+              const u_char *p, int length, int caplen)
+{
+       u_short extracted_ethertype;
+
+       if (!llc_print(ndo, p, length, caplen, NULL, NULL,
+           &extracted_ethertype)) {
+               /* ether_type not known, print raw packet */
+               if (extracted_ethertype) {
+                       ND_PRINT((ndo, "(LLC %s) ",
+               etherproto_string(htons(extracted_ethertype))));
+               }
+               if (!ndo->ndo_suppress_default_print)
+                       ND_DEFAULTPRINT(p, caplen);
+       }
+}
+
+/*
+ * Given a SAP value, generate the LLC header value for a UI packet
+ * with that SAP as the source and destination SAP.
+ */
+#define LLC_UI_HDR(sap)        ((sap)<<16 | (sap<<8) | 0x03)

 
 /*
 
 /*

- * This is the top level routine of the printer.  'p' is the points
- * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
- * 'length' is the length of the packet off the wire, and 'caplen'
+ * This is the top level routine of the printer.  'p' points
+ * to the LLC/SNAP 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.
  */
  * is the number of bytes actually captured.
  */

-void
-atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
+u_int
+atm_if_print(netdissect_options *ndo,
+             const struct pcap_pkthdr *h, const u_char *p)

 {
        u_int caplen = h->caplen;
        u_int length = h->len;
 {
        u_int caplen = h->caplen;
        u_int length = h->len;

-       u_short ethertype;
+       uint32_t llchdr;
+       u_int hdrlen = 0;

 
 

-       ts_print(&h->ts);
+       if (caplen < 1 || length < 1) {
+               ND_PRINT((ndo, "%s", tstr));
+               return (caplen);
+       }
+
+        /* Cisco Style NLPID ? */
+        if (*p == LLC_UI) {
+            if (ndo->ndo_eflag)
+                ND_PRINT((ndo, "CNLPID "));
+            isoclns_print(ndo, p + 1, length - 1, caplen - 1);
+            return hdrlen;
+        }

 
 

-       if (caplen < 8) {
-               printf("[|atm]");
-               goto out;
+       /*
+        * Must have at least a DSAP, an SSAP, and the first byte of the
+        * control field.
+        */
+       if (caplen < 3 || length < 3) {
+               ND_PRINT((ndo, "%s", tstr));
+               return (caplen);

        }
        }

-       if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
-               /*XXX assume 802.6 MAC header from fore driver */
-               if (eflag)
-                       printf("%04x%04x %04x%04x ",
-                              p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
-                              p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
-                              p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
-                              p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
+
+       /*
+        * Extract the presumed LLC header into a variable, for quick
+        * testing.
+        * Then check for a header that's neither a header for a SNAP
+        * packet nor an RFC 2684 routed NLPID-formatted PDU nor
+        * an 802.2-but-no-SNAP IP packet.
+        */
+       llchdr = EXTRACT_24BITS(p);
+       if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
+           llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
+           llchdr != LLC_UI_HDR(LLCSAP_IP)) {
+               /*
+                * XXX - assume 802.6 MAC header from Fore driver.
+                *
+                * Unfortunately, the above list doesn't check for
+                * all known SAPs, doesn't check for headers where
+                * the source and destination SAP aren't the same,
+                * and doesn't check for non-UI frames.  It also
+                * runs the risk of an 802.6 MAC header that happens
+                * to begin with one of those values being
+                * incorrectly treated as an 802.2 header.
+                *
+                * So is that Fore driver still around?  And, if so,
+                * is it still putting 802.6 MAC headers on ATM
+                * packets?  If so, could it be changed to use a
+                * new DLT_IEEE802_6 value if we added it?
+                */
+               if (caplen < 20 || length < 20) {
+                       ND_PRINT((ndo, "%s", tstr));
+                       return (caplen);
+               }
+               if (ndo->ndo_eflag)
+                       ND_PRINT((ndo, "%08x%08x %08x%08x ",
+                              EXTRACT_32BITS(p),
+                              EXTRACT_32BITS(p+4),
+                              EXTRACT_32BITS(p+8),
+                              EXTRACT_32BITS(p+12)));

                p += 20;
                length -= 20;
                caplen -= 20;
                p += 20;
                length -= 20;
                caplen -= 20;

+               hdrlen += 20;

        }
        }

-       ethertype = p[6] << 8 | p[7];
-       if (eflag)
-               printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
-                      p[0], p[1], p[2], /* dsap/ssap/ctrl */
-                      p[3], p[4], p[5], /* manufacturer's code */
-                      ethertype);
+       atm_llc_print(ndo, p, length, caplen);
+       return (hdrlen);
+}

 
 

-       /*
-        * 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.
-        */
-       packetp = p;
-       snapend = p + caplen;
+/*
+ * ATM signalling.
+ */
+static const struct tok msgtype2str[] = {
+       { CALL_PROCEED,         "Call_proceeding" },
+       { CONNECT,              "Connect" },
+       { CONNECT_ACK,          "Connect_ack" },
+       { SETUP,                "Setup" },
+       { RELEASE,              "Release" },
+       { RELEASE_DONE,         "Release_complete" },
+       { RESTART,              "Restart" },
+       { RESTART_ACK,          "Restart_ack" },
+       { STATUS,               "Status" },
+       { STATUS_ENQ,           "Status_enquiry" },
+       { ADD_PARTY,            "Add_party" },
+       { ADD_PARTY_ACK,        "Add_party_ack" },
+       { ADD_PARTY_REJ,        "Add_party_reject" },
+       { DROP_PARTY,           "Drop_party" },
+       { DROP_PARTY_ACK,       "Drop_party_ack" },
+       { 0,                    NULL }
+};

 
 

-       length -= 8;
-       caplen -= 8;
-       p += 8;
+static void
+sig_print(netdissect_options *ndo,
+          const u_char *p, int caplen)
+{
+       uint32_t call_ref;

 
 

-       switch (ethertype) {
+       if (caplen < PROTO_POS) {
+               ND_PRINT((ndo, "%s", tstr));
+               return;
+       }
+       if (p[PROTO_POS] == Q2931) {
+               /*
+                * protocol:Q.2931 for User to Network Interface
+                * (UNI 3.1) signalling
+                */
+               ND_PRINT((ndo, "Q.2931"));
+               if (caplen < MSG_TYPE_POS) {
+                       ND_PRINT((ndo, " %s", tstr));
+                       return;
+               }
+               ND_PRINT((ndo, ":%s ",
+                   tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS])));

 
 

-       case ETHERTYPE_IP:
-               ip_print(p, length);
-               break;
+               /*
+                * The call reference comes before the message type,
+                * so if we know we have the message type, which we
+                * do from the caplen test above, we also know we have
+                * the call reference.
+                */
+               call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
+               ND_PRINT((ndo, "CALL_REF:0x%06x", call_ref));
+       } else {
+               /* SCCOP with some unknown protocol atop it */
+               ND_PRINT((ndo, "SSCOP, proto %d ", p[PROTO_POS]));
+       }
+}

 
 

-#ifdef INET6
-       case ETHERTYPE_IPV6:
-               ip6_print(p, length);
-               break;
-#endif /*INET6*/
+/*
+ * Print an ATM PDU (such as an AAL5 PDU).
+ */
+void
+atm_print(netdissect_options *ndo,
+          u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
+          u_int caplen)
+{
+       if (ndo->ndo_eflag)
+               ND_PRINT((ndo, "VPI:%u VCI:%u ", vpi, vci));

 
 

-               /*XXX this probably isn't right */
-       case ETHERTYPE_ARP:
-       case ETHERTYPE_REVARP:
-               arp_print(p, length, caplen);
-               break;
-#ifdef notyet
-       case ETHERTYPE_DN:
-               decnet_print(p, length, caplen);
-               break;
+       if (vpi == 0) {
+               switch (vci) {

 
 

-       case ETHERTYPE_ATALK:
-               if (vflag)
-                       fputs("et1 ", stdout);
-               atalk_print(p, length);
-               break;
+               case VCI_PPC:
+                       sig_print(ndo, p, caplen);
+                       return;

 
 

-       case ETHERTYPE_AARP:
-               aarp_print(p, length);
-               break;
+               case VCI_BCC:
+                       ND_PRINT((ndo, "broadcast sig: "));
+                       return;

 
 

-       case ETHERTYPE_LAT:
-       case ETHERTYPE_MOPRC:
-       case ETHERTYPE_MOPDL:
-               /* default_print for now */
-#endif
+               case VCI_OAMF4SC: /* fall through */
+               case VCI_OAMF4EC:
+                       oam_print(ndo, p, length, ATM_OAM_HEC);
+                       return;
+
+               case VCI_METAC:
+                       ND_PRINT((ndo, "meta: "));
+                       return;
+
+               case VCI_ILMIC:
+                       ND_PRINT((ndo, "ilmi: "));
+                       snmp_print(ndo, p, length);
+                       return;
+               }
+       }
+
+       switch (traftype) {
+
+       case ATM_LLC:

        default:
        default:

-               /* ether_type not known, print raw packet */
-               if (!eflag)
-                       printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
-                              p[0], p[1], p[2], /* dsap/ssap/ctrl */
-                              p[3], p[4], p[5], /* manufacturer's code */
-                              ethertype);
-               if (!xflag && !qflag)
-                       default_print(p, caplen);
+               /*
+                * Assumes traffic is LLC if unknown.
+                */
+               atm_llc_print(ndo, p, length, caplen);
+               break;
+
+       case ATM_LANE:
+               lane_print(ndo, p, length, caplen);
+               break;

        }
        }

-       if (xflag)
-               default_print(p, caplen);
- out:
-       putchar('\n');
+}
+
+struct oam_fm_loopback_t {
+    uint8_t loopback_indicator;
+    uint8_t correlation_tag[4];
+    uint8_t loopback_id[12];
+    uint8_t source_id[12];
+    uint8_t unused[16];
+};
+
+struct oam_fm_ais_rdi_t {
+    uint8_t failure_type;
+    uint8_t failure_location[16];
+    uint8_t unused[28];
+};
+
+int
+oam_print (netdissect_options *ndo,
+           const u_char *p, u_int length, u_int hec) {
+
+    uint32_t cell_header;
+    uint16_t vpi, vci, cksum, cksum_shouldbe, idx;
+    uint8_t  cell_type, func_type, payload, clp;
+
+    union {
+        const struct oam_fm_loopback_t *oam_fm_loopback;
+        const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi;
+    } oam_ptr;
+
+
+    cell_header = EXTRACT_32BITS(p+hec);
+    cell_type = ((*(p+ATM_HDR_LEN_NOHEC+hec))>>4) & 0x0f;
+    func_type = (*(p+ATM_HDR_LEN_NOHEC+hec)) & 0x0f;
+
+    vpi = (cell_header>>20)&0xff;
+    vci = (cell_header>>4)&0xffff;
+    payload = (cell_header>>1)&0x7;
+    clp = cell_header&0x1;
+
+    ND_PRINT((ndo, "%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u",
+           tok2str(oam_f_values, "OAM F5", vci),
+           vpi, vci,
+           tok2str(atm_pty_values, "Unknown", payload),
+           clp, length));
+
+    if (!ndo->ndo_vflag) {
+        return 1;
+    }
+
+    ND_PRINT((ndo, "\n\tcell-type %s (%u)",
+           tok2str(oam_celltype_values, "unknown", cell_type),
+           cell_type));
+
+    if (oam_functype_values[cell_type] == NULL)
+        ND_PRINT((ndo, ", func-type unknown (%u)", func_type));
+    else
+        ND_PRINT((ndo, ", func-type %s (%u)",
+               tok2str(oam_functype_values[cell_type],"none",func_type),
+               func_type));
+
+    p += ATM_HDR_LEN_NOHEC + hec;
+
+    switch (cell_type << 4 | func_type) {
+    case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK):
+        oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+        ND_PRINT((ndo, "\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x",
+               tok2str(oam_fm_loopback_indicator_values,
+                       "Unknown",
+                       oam_ptr.oam_fm_loopback->loopback_indicator & OAM_FM_LOOPBACK_INDICATOR_MASK),
+               EXTRACT_32BITS(&oam_ptr.oam_fm_loopback->correlation_tag)));
+        ND_PRINT((ndo, "\n\tLocation-ID "));
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) {
+            if (idx % 2) {
+                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx])));
+            }
+        }
+        ND_PRINT((ndo, "\n\tSource-ID   "));
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) {
+            if (idx % 2) {
+                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->source_id[idx])));
+            }
+        }
+        break;
+
+    case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS):
+    case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI):
+        oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+        ND_PRINT((ndo, "\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type));
+        ND_PRINT((ndo, "\n\tLocation-ID "));
+        for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) {
+            if (idx % 2) {
+                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_ais_rdi->failure_location[idx])));
+            }
+        }
+        break;
+
+    case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_CONTCHECK):
+        /* FIXME */
+        break;
+
+    default:
+        break;
+    }
+
+    /* crc10 checksum verification */
+    cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
+        & OAM_CRC10_MASK;
+    cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN);
+
+    ND_PRINT((ndo, "\n\tcksum 0x%03x (%scorrect)",
+           cksum,
+           cksum_shouldbe == 0 ? "" : "in"));
+
+    return 1;

 }
 }