X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=utils%2Fmountd%2Frmtab.c;h=527377f8cd408c3e5899ab6040e295e76a69ea78;hp=b2c04e769750d289a4fd8b2a929596e7e49ee0e5;hb=014e00dfaea0efc92150e2aedc5ca43aa337545e;hpb=454aea5dad83ca75f3154ff12ecff39169703e69

diff --git a/utils/mountd/rmtab.c b/utils/mountd/rmtab.c
index b2c04e7..527377f 100644
--- a/utils/mountd/rmtab.c
+++ b/utils/mountd/rmtab.c
@@ -16,7 +16,7 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>
-#include "xmalloc.h"
+
 #include "misc.h"
 #include "exportfs.h"
 #include "xio.h"
@@ -173,6 +173,18 @@ out_unlock:
 	xfunlock(lockid);
 }
 
+static void
+mountlist_freeall(mountlist list)
+{
+	while (list != NULL) {
+		mountlist m = list;
+		list = m->ml_next;
+		free(m->ml_hostname);
+		free(m->ml_directory);
+		free(m);
+	}
+}
+
 mountlist
 mountlist_list(void)
 {
@@ -182,8 +194,6 @@ mountlist_list(void)
 	struct rmtabent		*rep;
 	struct stat		stb;
 	int			lockid;
-	struct in_addr		addr;
-	struct hostent		*he;
 
 	if ((lockid = xflock(_PATH_RMTABLCK, "r")) < 0)
 		return NULL;
@@ -194,26 +204,42 @@ mountlist_list(void)
 		return NULL;
 	}
 	if (stb.st_mtime != last_mtime) {
-		while (mlist) {
-			mlist = (m = mlist)->ml_next;
-			xfree(m->ml_hostname);
-			xfree(m->ml_directory);
-			xfree(m);
-		}
+		mountlist_freeall(mlist);
+		mlist = NULL;
 		last_mtime = stb.st_mtime;
 
 		setrmtabent("r");
 		while ((rep = getrmtabent(1, NULL)) != NULL) {
-			m = (mountlist) xmalloc(sizeof(*m));
-
-			if (reverse_resolve &&
-			   inet_aton((const char *) rep->r_client, &addr) &&
-			   (he = gethostbyaddr(&addr, sizeof(addr), AF_INET)))
-				m->ml_hostname = xstrdup(he->h_name);
-			else
-				m->ml_hostname = xstrdup(rep->r_client);
+			m = calloc(1, sizeof(*m));
+			if (m == NULL) {
+				mountlist_freeall(mlist);
+				mlist = NULL;
+				xlog(L_ERROR, "%s: memory allocation failed",
+						__func__);
+				break;
+			}
+
+			if (reverse_resolve) {
+				struct addrinfo *ai;
+				ai = host_pton(rep->r_client);
+				if (ai != NULL) {
+					m->ml_hostname = host_canonname(ai->ai_addr);
+					freeaddrinfo(ai);
+				}
+			}
+			if (m->ml_hostname == NULL)
+				m->ml_hostname = strdup(rep->r_client);
+
+			m->ml_directory = strdup(rep->r_path);
+
+			if (m->ml_hostname == NULL || m->ml_directory == NULL) {
+				mountlist_freeall(mlist);
+				mlist = NULL;
+				xlog(L_ERROR, "%s: memory allocation failed",
+						__func__);
+				break;
+			}
 
- 			m->ml_directory = xstrdup(rep->r_path);
 			m->ml_next = mlist;
 			mlist = m;
 		}