diff options
Diffstat (limited to 'freebsd/contrib/tcpdump/print-ipnet.c')
| -rw-r--r-- | freebsd/contrib/tcpdump/print-ipnet.c | 44 |
1 files changed, 27 insertions, 17 deletions
diff --git a/freebsd/contrib/tcpdump/print-ipnet.c b/freebsd/contrib/tcpdump/print-ipnet.c index cf9d2aeb..b3365d84 100644 --- a/freebsd/contrib/tcpdump/print-ipnet.c +++ b/freebsd/contrib/tcpdump/print-ipnet.c @@ -13,16 +13,19 @@ #include <netdissect-stdinc.h> #include "netdissect.h" +#include "extract.h" + +static const char tstr[] = "[|ipnet]"; typedef struct ipnet_hdr { - uint8_t iph_version; - uint8_t iph_family; - uint16_t iph_htype; - uint32_t iph_pktlen; - uint32_t iph_ifindex; - uint32_t iph_grifindex; - uint32_t iph_zsrc; - uint32_t iph_zdst; + nd_uint8_t iph_version; + nd_uint8_t iph_family; + nd_uint16_t iph_htype; + nd_uint32_t iph_pktlen; + nd_uint32_t iph_ifindex; + nd_uint32_t iph_grifindex; + nd_uint32_t iph_zsrc; + nd_uint32_t iph_zdst; } ipnet_hdr_t; #define IPH_AF_INET 2 /* Matches Solaris's AF_INET */ @@ -42,21 +45,26 @@ ipnet_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length) const ipnet_hdr_t *hdr; hdr = (const ipnet_hdr_t *)bp; - ND_PRINT((ndo, "%d > %d", hdr->iph_zsrc, hdr->iph_zdst)); + ND_TCHECK(*hdr); + ND_PRINT((ndo, "%d > %d", EXTRACT_32BITS(hdr->iph_zsrc), + EXTRACT_32BITS(hdr->iph_zdst))); if (!ndo->ndo_qflag) { ND_PRINT((ndo,", family %s (%d)", tok2str(ipnet_values, "Unknown", - hdr->iph_family), - hdr->iph_family)); + EXTRACT_8BITS(&hdr->iph_family)), + EXTRACT_8BITS(&hdr->iph_family))); } else { ND_PRINT((ndo,", %s", tok2str(ipnet_values, "Unknown Ethertype (0x%04x)", - hdr->iph_family))); + EXTRACT_8BITS(&hdr->iph_family)))); } ND_PRINT((ndo, ", length %u: ", length)); + return; +trunc: + ND_PRINT((ndo, " %s", tstr)); } static void @@ -64,10 +72,8 @@ ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen { const ipnet_hdr_t *hdr; - if (caplen < sizeof(ipnet_hdr_t)) { - ND_PRINT((ndo, "[|ipnet]")); - return; - } + if (caplen < sizeof(ipnet_hdr_t)) + goto trunc; if (ndo->ndo_eflag) ipnet_hdr_print(ndo, p, length); @@ -77,7 +83,8 @@ ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen hdr = (const ipnet_hdr_t *)p; p += sizeof(ipnet_hdr_t); - switch (hdr->iph_family) { + ND_TCHECK2(hdr->iph_family, 1); + switch (EXTRACT_8BITS(&hdr->iph_family)) { case IPH_AF_INET: ip_print(ndo, p, length); @@ -96,6 +103,9 @@ ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen ND_DEFAULTPRINT(p, caplen); break; } + return; +trunc: + ND_PRINT((ndo, " %s", tstr)); } /* |