document SIGUSR1 in manual page

[tcpdump] / print-atm.c

diff --git a/print-atm.c b/print-atm.c
index 110d3881f16015d3c2c4434634247555896687ee..9361065937b2951190dd13bc6219db84d24ee2e6 100644 (file)
--- a/print-atm.c
+++ b/print-atm.c
@@ -18,60 +18,92 @@
  * 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[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.39 2005-05-18 20:24:04 hannes Exp $ (LBL)";
-#endif

 
 

+#define NETDISSECT_REWORKED

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include <tcpdump-stdinc.h>
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include <tcpdump-stdinc.h>
 

-#include <stdio.h>
-#include <pcap.h>
-#include <string.h>
-

 #include "interface.h"
 #include "extract.h"
 #include "addrtoname.h"
 #include "interface.h"
 #include "extract.h"
 #include "addrtoname.h"

-#include "ethertype.h"

 #include "atm.h"
 #include "atmuni31.h"
 #include "llc.h"
 
 #include "atm.h"
 #include "atmuni31.h"
 #include "llc.h"
 

-#include "ether.h"
+static const char tstr[] = "[|atm]";
+
+#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
+
+static const struct tok oam_f_values[] = {
+    { VCI_OAMF4SC, "OAM F4 (segment)" },
+    { VCI_OAMF4EC, "OAM F4 (end)" },
+    { 0, NULL }
+};
+
+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

 
 

-struct tok oam_celltype_values[] = {
-    { 0x1, "Fault Management" },
-    { 0x2, "Performance Management" },
-    { 0x8, "activate/deactivate" },
-    { 0xf, "System Management" },
+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 }
 };
 
     { 0, NULL }
 };
 

-struct tok oam_fm_functype_values[] = {
-    { 0x0, "AIS" },
-    { 0x1, "RDI" },
-    { 0x4, "Continuity Check" },
-    { 0x8, "Loopback" },
+#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 }
 };
 
     { 0, NULL }
 };
 

-struct tok oam_pm_functype_values[] = {
+static const struct tok oam_pm_functype_values[] = {

     { 0x0, "Forward Monitoring" },
     { 0x1, "Backward Reporting" },
     { 0x2, "Monitoring and Reporting" },
     { 0, NULL }
 };
 
     { 0x0, "Forward Monitoring" },
     { 0x1, "Backward Reporting" },
     { 0x2, "Monitoring and Reporting" },
     { 0, NULL }
 };
 

-struct tok oam_ad_functype_values[] = {
+static const struct tok oam_ad_functype_values[] = {

     { 0x0, "Performance Monitoring" },
     { 0x1, "Continuity Check" },
     { 0, NULL }
 };
 
     { 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 */
 static const struct tok *oam_functype_values[16] = {
     NULL,
     oam_fm_functype_values, /* 1 */


@@ -95,19 +127,20 @@ static const struct tok *oam_functype_values[16] = {
  * Print an RFC 1483 LLC-encapsulated ATM frame.
  */
 static void
  * Print an RFC 1483 LLC-encapsulated ATM frame.
  */
 static void

-atm_llc_print(const u_char *p, int length, int caplen)
+atm_llc_print(netdissect_options *ndo,
+              const u_char *p, int length, int caplen)

 {
        u_short extracted_ethertype;
 
 {
        u_short extracted_ethertype;
 

-       if (!llc_print(p, length, caplen, NULL, NULL,
+       if (!llc_print(ndo, p, length, caplen, NULL, NULL,

            &extracted_ethertype)) {
                /* ether_type not known, print raw packet */
                if (extracted_ethertype) {
            &extracted_ethertype)) {
                /* ether_type not known, print raw packet */
                if (extracted_ethertype) {

-                       printf("(LLC %s) ",
-               etherproto_string(htons(extracted_ethertype)));
+                       ND_PRINT((ndo, "(LLC %s) ",
+               etherproto_string(htons(extracted_ethertype))));

                }
                }

-               if (!xflag && !qflag)
-                       default_print(p, caplen);
+               if (!ndo->ndo_suppress_default_print)
+                       ND_DEFAULTPRINT(p, caplen);

        }
 }
 
        }
 }
 


@@ -124,15 +157,33 @@ atm_llc_print(const u_char *p, int length, int caplen)
  * is the number of bytes actually captured.
  */
 u_int
  * is the number of bytes actually captured.
  */
 u_int

-atm_if_print(const struct pcap_pkthdr *h, const u_char *p)
+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_int32_t llchdr;
+       uint32_t llchdr;

        u_int hdrlen = 0;
 
        u_int hdrlen = 0;
 

-       if (caplen < 8) {
-               printf("[|atm]");
+       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;
+        }
+
+       /*
+        * 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);
        }
 
                return (caplen);
        }
 


@@ -163,25 +214,29 @@ atm_if_print(const struct pcap_pkthdr *h, const u_char *p)
                 * packets?  If so, could it be changed to use a
                 * new DLT_IEEE802_6 value if we added it?
                 */
                 * packets?  If so, could it be changed to use a
                 * new DLT_IEEE802_6 value if we added it?
                 */

-               if (eflag)
-                       printf("%08x%08x %08x%08x ",
+               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),
                               EXTRACT_32BITS(p+4),
                               EXTRACT_32BITS(p+8),

-                              EXTRACT_32BITS(p+12));
+                              EXTRACT_32BITS(p+12)));

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

-       atm_llc_print(p, length, caplen);
+       atm_llc_print(ndo, p, length, caplen);

        return (hdrlen);
 }
 
 /*
  * ATM signalling.
  */
        return (hdrlen);
 }
 
 /*
  * ATM signalling.
  */

-static struct tok msgtype2str[] = {
+static const struct tok msgtype2str[] = {

        { CALL_PROCEED,         "Call_proceeding" },
        { CONNECT,              "Connect" },
        { CONNECT_ACK,          "Connect_ack" },
        { CALL_PROCEED,         "Call_proceeding" },
        { CONNECT,              "Connect" },
        { CONNECT_ACK,          "Connect_ack" },


@@ -201,36 +256,39 @@ static struct tok msgtype2str[] = {
 };
 
 static void
 };
 
 static void

-sig_print(const u_char *p, int caplen)
+sig_print(netdissect_options *ndo,
+          const u_char *p, int caplen)

 {
 {

-       bpf_u_int32 call_ref;
+       uint32_t call_ref;

 
        if (caplen < PROTO_POS) {
 
        if (caplen < PROTO_POS) {

-               printf("[|atm]");
+               ND_PRINT((ndo, "%s", tstr));

                return;
        }
        if (p[PROTO_POS] == Q2931) {
                /*
                return;
        }
        if (p[PROTO_POS] == Q2931) {
                /*

-                * protocol:Q.2931 for User to Network Interface 
+                * protocol:Q.2931 for User to Network Interface

                 * (UNI 3.1) signalling
                 */
                 * (UNI 3.1) signalling
                 */

-               printf("Q.2931");
+               ND_PRINT((ndo, "Q.2931"));

                if (caplen < MSG_TYPE_POS) {
                if (caplen < MSG_TYPE_POS) {

-                       printf(" [|atm]");
+                       ND_PRINT((ndo, " %s", tstr));

                        return;
                }
                        return;
                }

-               printf(":%s ",
-                   tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]));
+               ND_PRINT((ndo, ":%s ",
+                   tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS])));

 
 

-               if (caplen < CALL_REF_POS+3) {
-                       printf("[|atm]");
-                       return;
-               }
+               /*
+                * 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]);
                call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);

-               printf("CALL_REF:0x%06x", call_ref);
+               ND_PRINT((ndo, "CALL_REF:0x%06x", call_ref));

        } else {
                /* SCCOP with some unknown protocol atop it */
        } else {
                /* SCCOP with some unknown protocol atop it */

-               printf("SSCOP, proto %d ", p[PROTO_POS]);
+               ND_PRINT((ndo, "SSCOP, proto %d ", p[PROTO_POS]));

        }
 }
 
        }
 }
 


@@ -238,35 +296,36 @@ sig_print(const u_char *p, int caplen)
  * Print an ATM PDU (such as an AAL5 PDU).
  */
 void
  * Print an ATM PDU (such as an AAL5 PDU).
  */
 void

-atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
-    u_int caplen)
+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 (eflag)
-               printf("VPI:%u VCI:%u ", vpi, vci);
+       if (ndo->ndo_eflag)
+               ND_PRINT((ndo, "VPI:%u VCI:%u ", vpi, vci));

 
        if (vpi == 0) {
                switch (vci) {
 
 
        if (vpi == 0) {
                switch (vci) {
 

-               case PPC:
-                       sig_print(p, caplen);
+               case VCI_PPC:
+                       sig_print(ndo, p, caplen);

                        return;
 
                        return;
 

-               case BCC:
-                       printf("broadcast sig: ");
+               case VCI_BCC:
+                       ND_PRINT((ndo, "broadcast sig: "));

                        return;
 
                        return;
 

-               case OAMF4SC: /* fall through */
-               case OAMF4EC:
-                        oam_print(p, length);
+               case VCI_OAMF4SC: /* fall through */
+               case VCI_OAMF4EC:
+                       oam_print(ndo, p, length, ATM_OAM_HEC);

                        return;
 
                        return;
 

-               case METAC:
-                       printf("meta: ");
+               case VCI_METAC:
+                       ND_PRINT((ndo, "meta: "));

                        return;
 
                        return;
 

-               case ILMIC:
-                       printf("ilmi: ");
-                       snmp_print(p, length);
+               case VCI_ILMIC:
+                       ND_PRINT((ndo, "ilmi: "));
+                       snmp_print(ndo, p, length);

                        return;
                }
        }
                        return;
                }
        }


@@ -278,55 +337,125 @@ atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
                /*
                 * Assumes traffic is LLC if unknown.
                 */
                /*
                 * Assumes traffic is LLC if unknown.
                 */

-               atm_llc_print(p, length, caplen);
+               atm_llc_print(ndo, p, length, caplen);

                break;
 
        case ATM_LANE:
                break;
 
        case ATM_LANE:

-               lane_print(p, length, caplen);
+               lane_print(ndo, p, length, caplen);

                break;
        }
 }
 
                break;
        }
 }
 

-int 
-oam_print (const u_char *p, u_int length) {
+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) {

 
 

-    u_int16_t cell_header, cell_type, func_type,vpi,vci,payload,clp;
+    uint32_t cell_header;
+    uint16_t vpi, vci, cksum, cksum_shouldbe, idx;
+    uint8_t  cell_type, func_type, payload, clp;

 
 

-    cell_header = EXTRACT_32BITS(p);
-    cell_type = ((*(p+4))>>4) & 0x0f;
-    func_type = *(p+4) & 0x0f;
+    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;
 
 
     vpi = (cell_header>>20)&0xff;
     vci = (cell_header>>4)&0xffff;
     payload = (cell_header>>1)&0x7;
     clp = cell_header&0x1;
 

-    switch (vci) {
-    case OAMF4SC:
-        printf("OAM F4 (segment), ");
-            break;
-    case OAMF4EC:
-        printf("OAM F4 (end), ");
-        break;
-    default:
-        printf("OAM F5, ");
-        break;
-    }
+    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 (eflag)
-        printf("vpi %u, vci %u, payload %u, clp %u, ",vpi,vci,payload,clp);
+    if (!ndo->ndo_vflag) {
+        return 1;
+    }

 
 

-    printf("cell-type %s (%u)",
+    ND_PRINT((ndo, "\n\tcell-type %s (%u)",

            tok2str(oam_celltype_values, "unknown", cell_type),
            tok2str(oam_celltype_values, "unknown", cell_type),

-           cell_type);
+           cell_type));

 
     if (oam_functype_values[cell_type] == NULL)
 
     if (oam_functype_values[cell_type] == NULL)

-        printf(", func-type unknown (%u)", func_type);
+        ND_PRINT((ndo, ", func-type unknown (%u)", func_type));

     else
     else

-        printf(", func-type %s (%u)",
-               bittok2str(oam_functype_values[cell_type],"none",func_type),
-               func_type);
+        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"));

 
 

-    printf(", length %u",length);

     return 1;
 }
     return 1;
 }