CI: Add warning exemptions for Sun C (suncc-5.14) on Solaris 10

[tcpdump] / print-sll.c

diff --git a/print-sll.c b/print-sll.c
index fe529efa1ed7503a35ea389fe5d6bd7273cd2a6a..87d824466508326df2d8cf9689aeb3a67632acce 100644 (file)
--- a/print-sll.c
+++ b/print-sll.c
@@ -21,16 +21,15 @@
 
 /* \summary: Linux cooked sockets capture printer */
 
-#ifdef HAVE_CONFIG_H
 #include <config.h>
-#endif
 
-#ifdef HAVE_NET_IF_H
+#ifdef __linux__
 #include <net/if.h>
 #endif
 
 #include "netdissect-stdinc.h"
 
+#define ND_LONGJMP_FROM_TCHECK
 #include "netdissect.h"
 #include "addrtoname.h"
 #include "ethertype.h"
@@ -162,8 +161,8 @@ sll_print(netdissect_options *ndo, const struct sll_header *sllp, u_int length)
         * For now, we just assume 6 means Ethernet.
         * XXX - print others as strings of hex?
         */
-       if (GET_BE_U_2(sllp->sll_halen) == 6)
-               ND_PRINT("%s ", GET_ETHERADDR_STRING(sllp->sll_addr));
+       if (GET_BE_U_2(sllp->sll_halen) == MAC48_LEN)
+               ND_PRINT("%s ", GET_MAC48_STRING(sllp->sll_addr));
 
        if (!ndo->ndo_qflag) {
                ether_type = GET_BE_U_2(sllp->sll_protocol);
@@ -211,7 +210,7 @@ sll_print(netdissect_options *ndo, const struct sll_header *sllp, u_int length)
  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  * is the number of bytes actually captured.
  */
-u_int
+void
 sll_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
 {
        u_int caplen = h->caplen;
@@ -222,16 +221,8 @@ sll_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char
        int llc_hdrlen;
        u_int hdrlen;
 
-       ndo->ndo_protocol = "sll_if";
-       if (caplen < SLL_HDR_LEN) {
-               /*
-                * XXX - this "can't happen" because "pcap-linux.c" always
-                * adds this many bytes of header to every packet in a
-                * cooked socket capture.
-                */
-               nd_print_trunc(ndo);
-               return (caplen);
-       }
+       ndo->ndo_protocol = "sll";
+       ND_TCHECK_LEN(p, SLL_HDR_LEN);
 
        sllp = (const struct sll_header *)p;
 
@@ -254,7 +245,9 @@ sll_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char
                 * This is an packet with a radiotap header;
                 * just dissect the payload as such.
                 */
-               return (SLL_HDR_LEN + ieee802_11_radio_print(ndo, p, length, caplen));
+               ndo->ndo_ll_hdr_len += SLL_HDR_LEN;
+               ndo->ndo_ll_hdr_len += ieee802_11_radio_print(ndo, p, length, caplen);
+               return;
        }
        ether_type = GET_BE_U_2(sllp->sll_protocol);
 
@@ -304,7 +297,8 @@ recurse:
                if (caplen < 4) {
                        ndo->ndo_protocol = "vlan";
                        nd_print_trunc(ndo);
-                       return (hdrlen + caplen);
+                       ndo->ndo_ll_hdr_len += hdrlen + caplen;
+                       return;
                }
                if (ndo->ndo_eflag) {
                        uint16_t tag = GET_BE_U_2(p);
@@ -334,7 +328,7 @@ recurse:
                }
        }
 
-       return (hdrlen);
+       ndo->ndo_ll_hdr_len += hdrlen;
 }
 
 static void
@@ -350,8 +344,8 @@ sll2_print(netdissect_options *ndo, const struct sll2_header *sllp, u_int length
         * For now, we just assume 6 means Ethernet.
         * XXX - print others as strings of hex?
         */
-       if (GET_U_1(sllp->sll2_halen) == 6)
-               ND_PRINT("%s ", GET_ETHERADDR_STRING(sllp->sll2_addr));
+       if (GET_U_1(sllp->sll2_halen) == MAC48_LEN)
+               ND_PRINT("%s ", GET_MAC48_STRING(sllp->sll2_addr));
 
        if (!ndo->ndo_qflag) {
                ether_type = GET_BE_U_2(sllp->sll2_protocol);
@@ -398,8 +392,21 @@ sll2_print(netdissect_options *ndo, const struct sll2_header *sllp, u_int length
  * Linux "cooked capture" 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.
+ *
+ * On Linux, we attempt to look up the interface index and print the
+ * name of the interface on which the packet arrived or was sent.
+ *
+ * This look up is only likely to work well if done on the same machine
+ * as the one on which the capture was done, as the interface with a
+ * given index on the latter machine is unlikely to have the same
+ * name as the interface with that index on the former machine.
+ *
+ * As DLT_LINUX_SLL2 live captures are supported only on Linux, this
+ * means that if the machine on which we're reading the file isn't
+ * running Linux, it's probably not the machine that captured the file,
+ * so we don't bother trying to do the lookup on non-Linux machines.
  */
-u_int
+void
 sll2_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
 {
        u_int caplen = h->caplen;
@@ -409,24 +416,16 @@ sll2_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char
        u_short ether_type;
        int llc_hdrlen;
        u_int hdrlen;
-#ifdef HAVE_NET_IF_H
+#ifdef __linux__
        uint32_t if_index;
        char ifname[IF_NAMESIZE];
 #endif
 
-       ndo->ndo_protocol = "sll2_if";
-       if (caplen < SLL2_HDR_LEN) {
-               /*
-                * XXX - this "can't happen" because "pcap-linux.c" always
-                * adds this many bytes of header to every packet in a
-                * cooked socket capture.
-                */
-               nd_print_trunc(ndo);
-               return (caplen);
-       }
+       ndo->ndo_protocol = "sll2";
+       ND_TCHECK_LEN(p, SLL2_HDR_LEN);
 
        sllp = (const struct sll2_header *)p;
-#ifdef HAVE_NET_IF_H
+#ifdef __linux__
        if_index = GET_BE_U_4(sllp->sll2_if_index);
        if (!if_indextoname(if_index, ifname))
                strncpy(ifname, "?", 2);
@@ -455,7 +454,9 @@ sll2_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char
                 * This is an packet with a radiotap header;
                 * just dissect the payload as such.
                 */
-               return (SLL_HDR_LEN + ieee802_11_radio_print(ndo, p, length, caplen));
+               ndo->ndo_ll_hdr_len += SLL2_HDR_LEN;
+               ndo->ndo_ll_hdr_len += ieee802_11_radio_print(ndo, p, length, caplen);
+               return;
        }
        ether_type = GET_BE_U_2(sllp->sll2_protocol);
 
@@ -505,7 +506,8 @@ recurse:
                if (caplen < 4) {
                        ndo->ndo_protocol = "vlan";
                        nd_print_trunc(ndo);
-                       return (hdrlen + caplen);
+                       ndo->ndo_ll_hdr_len += hdrlen + caplen;
+                       return;
                }
                if (ndo->ndo_eflag) {
                        uint16_t tag = GET_BE_U_2(p);
@@ -529,11 +531,11 @@ recurse:
                if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) {
                        /* ether_type not known, print raw packet */
                        if (!ndo->ndo_eflag)
-                               sll2_print(ndo, sllp, length + SLL_HDR_LEN);
+                               sll2_print(ndo, sllp, length + SLL2_HDR_LEN);
                        if (!ndo->ndo_suppress_default_print)
                                ND_DEFAULTPRINT(p, caplen);
                }
        }
 
-       return (hdrlen);
+       ndo->ndo_ll_hdr_len += hdrlen;
 }