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From c48fba64fbbff9c75c79e32ab33aa65742c197d9 Mon Sep 17 00:00:00 2001
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From: rpm-build <rpm-build>
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Date: Mon, 20 Oct 2014 14:12:46 +0200
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Subject: [PATCH 2/8] Use getnameinfo instead of gethostbyaddr
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---
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addrtoname.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++--
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1 file changed, 46 insertions(+), 2 deletions(-)
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diff --git a/addrtoname.c b/addrtoname.c
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index 6975b71..949acb7 100644
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--- a/addrtoname.c
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+++ b/addrtoname.c
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@@ -220,7 +220,6 @@ static uint32_t f_localnet;
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const char *
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getname(netdissect_options *ndo, const u_char *ap)
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{
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- register struct hostent *hp;
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uint32_t addr;
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struct hnamemem *p;
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@@ -242,6 +241,28 @@ getname(netdissect_options *ndo, const u_char *ap)
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*/
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if (!ndo->ndo_nflag &&
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(addr & f_netmask) == f_localnet) {
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+#ifdef HAVE_GETNAMEINFO
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+ struct sockaddr_in sa;
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+ char hbuf[NI_MAXHOST];
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+
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+ memset(&sa, 0, sizeof (sa));
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+ sa.sin_family = AF_INET;
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+ sa.sin_addr.s_addr = addr;
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+ if (!getnameinfo((struct sockaddr *)&sa, sizeof (sa),
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+ hbuf, sizeof (hbuf), NULL, 0, 0)) {
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+ if (ndo->ndo_Nflag) {
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+ char *dotp;
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+
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+ /* Remove domain qualifications */
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+ dotp = strchr(hbuf, '.');
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+ if (dotp)
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+ *dotp = '\0';
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+ }
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+ p->name = strdup(hbuf);
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+ return p->name;
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+ }
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+#else
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+ register struct hostent *hp;
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hp = gethostbyaddr((char *)&addr, 4, AF_INET);
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if (hp) {
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char *dotp;
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@@ -258,6 +279,7 @@ getname(netdissect_options *ndo, const u_char *ap)
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}
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return (p->name);
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}
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+#endif
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}
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p->name = strdup(intoa(addr));
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if (p->name == NULL)
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@@ -272,7 +294,6 @@ getname(netdissect_options *ndo, const u_char *ap)
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const char *
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getname6(netdissect_options *ndo, const u_char *ap)
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{
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- register struct hostent *hp;
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union {
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struct in6_addr addr;
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struct for_hash_addr {
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@@ -297,6 +318,28 @@ getname6(netdissect_options *ndo, const u_char *ap)
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* Do not print names if -n was given.
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*/
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if (!ndo->ndo_nflag) {
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+#ifdef HAVE_GETNAMEINFO
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+ struct sockaddr_in6 sa;
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+ char hbuf[NI_MAXHOST];
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+
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+ memset(&sa, 0, sizeof (sa));
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+ sa.sin6_family = AF_INET6;
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+ sa.sin6_addr = addr.addr;
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+ if (!getnameinfo((struct sockaddr *)&sa, sizeof (sa),
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+ hbuf, sizeof (hbuf), NULL, 0, 0)) {
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+ if (ndo->ndo_Nflag) {
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+ char *dotp;
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+
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+ /* Remove domain qualifications */
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+ dotp = strchr(hbuf, '.');
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+ if (dotp)
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+ *dotp = '\0';
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+ }
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+ p->name = strdup(hbuf);
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+ return p->name;
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+ }
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+#else
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+ register struct hostent *hp;
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hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET6);
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if (hp) {
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char *dotp;
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@@ -313,6 +356,7 @@ getname6(netdissect_options *ndo, const u_char *ap)
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}
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return (p->name);
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}
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+#endif
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}
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cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf));
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p->name = strdup(cp);
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--
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2.9.3
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