Avoid some deprecated networking functions

rpminspect trips up on some old networking functions in libgtop, which
are mentioned as deprecated in the Linux man pages.

inet_ntoa() only works on IPv4 addresses, whereas the newer inet_ntop()
works on both IPv4 and IPv6 addresses, so use inet_ntop() instead.
Similarly, use getaddrinfo() rather than gethostbyname(), and avoid
inet_addr() entirely.

https://bugzilla.redhat.com/show_bug.cgi?id=2050712

3 files changed, 27 insertions, 19 deletions

diff --git a/examples/netload.c b/examples/netload.c
index 979b245d..520b5040 100644
--- a/examples/netload.c
+++ b/examples/netload.c
@@ -66,7 +66,7 @@ main (int argc, char *argv [])
 	glibtop_netload netload;
 	unsigned method, count, port;
 	struct in_addr addr, subnet;
-	char *address_string, *subnet_string;
+	char address_string[INET_ADDRSTRLEN], subnet_string[INET_ADDRSTRLEN];
 	char address6_string[INET6_ADDRSTRLEN], prefix6_string[INET6_ADDRSTRLEN];
 	char *hwaddress_string;
 	char buffer [BUFSIZ];
@@ -105,9 +105,8 @@ main (int argc, char *argv [])
 	addr.s_addr = netload.address;
 	subnet.s_addr = netload.subnet;
 
-	address_string = g_strdup (inet_ntoa (addr));
-	subnet_string  = g_strdup (inet_ntoa (subnet));
-
+	inet_ntop (AF_INET, &addr,   address_string, INET_ADDRSTRLEN);
+	inet_ntop (AF_INET, &subnet, subnet_string,  INET_ADDRSTRLEN);
 	inet_ntop (AF_INET6, netload.address6, address6_string, INET6_ADDRSTRLEN);
 	inet_ntop (AF_INET6, netload.prefix6,  prefix6_string,  INET6_ADDRSTRLEN);
 
@@ -153,9 +152,6 @@ main (int argc, char *argv [])
 		hwaddress_string);
 
 
-	g_free (address_string);
-	g_free (subnet_string);
-
 	glibtop_close ();
 
 	exit (0);
diff --git a/src/daemon/gnuserv.c b/src/daemon/gnuserv.c
index 78ebb643..26e9dd92 100644
--- a/src/daemon/gnuserv.c
+++ b/src/daemon/gnuserv.c
@@ -392,6 +392,7 @@ handle_internet_request (int ls)
     int s;
     size_t addrlen = sizeof (struct sockaddr_in);
     struct sockaddr_in peer;	/* for peer socket address */
+    char addrstr[addrlen];
     pid_t pid;
 
     memset ((char *) &peer, 0, sizeof (struct sockaddr_in));
@@ -401,21 +402,24 @@ handle_internet_request (int ls)
 	exit (1);
     }
 
+    /* TODO: Check errno. */
+    inet_ntop (AF_INET, &peer, addrstr, addrlen);
+
     if (verbose_output)
 	syslog_message (LOG_INFO, "Connection was made from %s port %u.",
-			inet_ntoa (peer.sin_addr), ntohs (peer.sin_port));
+			addrstr, ntohs (peer.sin_port));
 
     /* Check that access is allowed - if not return crud to the client */
     if (!permitted (peer.sin_addr.s_addr, s)) {
 	close (s);
 	syslog_message (LOG_CRIT, "Refused connection from %s.",
-			inet_ntoa (peer.sin_addr));
+			addrstr);
 	return;
     }			/* if */
 
     if (verbose_output)
 	syslog_message (LOG_INFO, "Accepted connection from %s port %u.",
-			inet_ntoa (peer.sin_addr), ntohs (peer.sin_port));
+			addrstr, ntohs (peer.sin_port));
 
     pid = fork ();
 
@@ -436,7 +440,7 @@ handle_internet_request (int ls)
 
     if (verbose_output)
 	syslog_message (LOG_INFO, "Closed connection to %s port %u.",
-			inet_ntoa (peer.sin_addr), ntohs (peer.sin_port));
+			addrstr, ntohs (peer.sin_port));
 
     _exit (0);
 }				/* handle_internet_request */
@@ -560,6 +564,7 @@ main (int argc, char **argv)
     if (invoked_from_inetd) {
 	size_t addrlen = sizeof (struct sockaddr_in);
 	struct sockaddr_in peer;
+	char addrstr[addrlen];
 
 	memset ((char *) &peer, 0, sizeof (struct sockaddr_in));
 
@@ -568,15 +573,18 @@ main (int argc, char **argv)
 	    exit (1);
 	}
 
+	/* TODO: Check errno. */
+	inet_ntop (AF_INET, &peer, addrstr, addrlen);
+
 	if (verbose_output)
 	    syslog_message (LOG_INFO, "Connection was made from %s port %u.",
-			    inet_ntoa (peer.sin_addr), ntohs (peer.sin_port));
+			    addrstr, ntohs (peer.sin_port));
 
 	/* Check that access is allowed - if not return crud to the client */
 	if (!permitted (peer.sin_addr.s_addr, 0)) {
 	    close (0);
 	    syslog_message (LOG_CRIT, "Refused connection from %s.",
-			    inet_ntoa (peer.sin_addr));
+			    addrstr);
 	    exit (1);
 	}
 
diff --git a/sysdeps/common/gnuslib.c b/sysdeps/common/gnuslib.c
index 79295485..3f994f2c 100644
--- a/sysdeps/common/gnuslib.c
+++ b/sysdeps/common/gnuslib.c
@@ -202,16 +202,20 @@ connect_to_unix_server (void)
 long
 glibtop_internet_addr (const char *host)
 {
-	struct hostent *hp;	/* pointer to host info for remote host */
+	/* specify IPv4 and TCP */
+	struct addrinfo hints = { AF_INET, SOCK_STREAM, };
+	struct addrinfo *result;/* pointer to host info for remote host */
 	IN_ADDR numeric_addr;	/* host address */
 
-	numeric_addr = inet_addr (host);
-	if (!NUMERIC_ADDR_ERROR)
+	if (getaddrinfo (NULL, host, &hints, &result) == 0) {
+		/* Take only the first address. */
+		struct sockaddr_in *res = (struct sockaddr_in *)result->ai_addr;
+		numeric_addr = res->sin_addr.s_addr;
+		freeaddrinfo (result);
 		return numeric_addr;
-	else if ((hp = gethostbyname (host)) != NULL)
-		return ((struct in_addr *) (hp->h_addr))->s_addr;
+	}
 	else {
-		glibtop_warn_io ("gethostbyname (%s)", host);
+		glibtop_warn_io ("getaddrinfo (%s)", host);
 		return -1;
 	}