TT#24097 Do not use magic variable names

These variables have magic meanings, we should avoid their usage to not
confuse readers nor trigger side-effects.

Change-Id: Ieb759f74ccde6ba6466f5c02743e3f881b5d53b7

tests/blist.pl

@@ -13,21 +13,21 @@ my $len = length(pack($format, (0) x 100));
 open(my $fh, "<", "/proc/rtpengine/$t/blist") or die;
 my $buf;
 while (sysread($fh, $buf, $len)) {
-	my @b = unpack($format, $buf);
+	my @buf = unpack($format, $buf);
 	for (2,6,10) {
-		if ($b[$_] == AF_INET) {
-			$b[$_ + 1] = inet_ntoa($b[$_ + 1]);
+		if ($buf[$_] == AF_INET) {
+			$buf[$_ + 1] = inet_ntoa($buf[$_ + 1]);
 		}
-		elsif ($b[$_] == AF_INET6) {
-			$b[$_ + 1] = inet_ntop(AF_INET6, $b[$_ + 1]);
+		elsif ($buf[$_] == AF_INET6) {
+			$buf[$_ + 1] = inet_ntop(AF_INET6, $buf[$_ + 1]);
 		}
-		elsif ($b[$_] == 0) {
-			$b[$_ + 1] = '---';
+		elsif ($buf[$_] == 0) {
+			$buf[$_ + 1] = '---';
 		}
 	}
 	for (18, 20, 22) {
-		$b[$_] += $b[$_ + 1] * 2**32;
+		$buf[$_] += $buf[$_ + 1] * 2**32;
 	}
-	printf("%5u %15s:%-5u -> %15s:%-5u (-> %15s:%-5u) [%u] [%llu %llu %llu]\n", @b[0,3,4,7,8,11,12,14,18,20,22]);
+	printf("%5u %15s:%-5u -> %15s:%-5u (-> %15s:%-5u) [%u] [%llu %llu %llu]\n", @buf[0,3,4,7,8,11,12,14,18,20,22]);
 }
 close($fh);

tests/simulator-ng.pl

@@ -334,24 +334,24 @@ sub rtp_savp {
 sub savp_crypto {
 	my ($sdp, $ctx, $ctx_o) = @_;
 
-	my @a = $sdp =~ /[\r\n]a=crypto:(\d+) (\w+) inline:([\w\/+=]{40,})(?:\|(?:2\^(\d+)|(\d+)))?(?:\|(\d+):(\d+))?(?: (.*?))?[\r\n]/sig;
-	@a or die;
+	my @aa = $sdp =~ /[\r\n]a=crypto:(\d+) (\w+) inline:([\w\/+=]{40,})(?:\|(?:2\^(\d+)|(\d+)))?(?:\|(\d+):(\d+))?(?: (.*?))?[\r\n]/sig;
+	@aa or die;
 	my $i = 0;
-	while (@a >= 8) {
-		$$ctx[$i]{in}{crypto_suite} = $NGCP::Rtpclient::SRTP::crypto_suites{$a[1]} or die;
-		$$ctx[$i]{in}{crypto_tag} = $a[0];
+	while (@aa >= 8) {
+		$$ctx[$i]{in}{crypto_suite} = $NGCP::Rtpclient::SRTP::crypto_suites{$aa[1]} or die;
+		$$ctx[$i]{in}{crypto_tag} = $aa[0];
 		($$ctx[$i]{in}{rtp_master_key}, $$ctx[$i]{in}{rtp_master_salt})
-			= NGCP::Rtpclient::SRTP::decode_inline_base64($a[2], $$ctx[$i]{in}{crypto_suite});
-		$$ctx[$i]{in}{rtp_mki} = $a[5];
-		$$ctx[$i]{in}{rtp_mki_len} = $a[6];
+			= NGCP::Rtpclient::SRTP::decode_inline_base64($aa[2], $$ctx[$i]{in}{crypto_suite});
+		$$ctx[$i]{in}{rtp_mki} = $aa[5];
+		$$ctx[$i]{in}{rtp_mki_len} = $aa[6];
 		undef($$ctx[$i]{in}{rtp_session_key});
 		undef($$ctx[$i]{in}{rtcp_session_key});
-		($a[7] || '') =~ /UNENCRYPTED_SRTP/ and $$ctx[$i]{in}{unenc_srtp} = 1;
-		($a[7] || '') =~ /UNENCRYPTED_SRTCP/ and $$ctx[$i]{in}{unenc_srtcp} = 1;
-		($a[7] || '') =~ /UNAUTHENTICATED_SRTP/ and $$ctx[$i]{in}{unauth_srtp} = 1;
+		($aa[7] || '') =~ /UNENCRYPTED_SRTP/ and $$ctx[$i]{in}{unenc_srtp} = 1;
+		($aa[7] || '') =~ /UNENCRYPTED_SRTCP/ and $$ctx[$i]{in}{unenc_srtcp} = 1;
+		($aa[7] || '') =~ /UNAUTHENTICATED_SRTP/ and $$ctx[$i]{in}{unauth_srtp} = 1;
 
 		$i++;
-		@a = @a[8 .. $#a];
+		@aa = @aa[8 .. $#aa];
 	}
 }