From aa278ae46dffc031baf51faa506add8a34d51c1b Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 30 Jun 2023 10:12:55 +0200
Subject: Adding upstream version 2.1.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/network.c | 90 +++++++++++++++++++++++++++++++++--------------------------
 1 file changed, 51 insertions(+), 39 deletions(-)

(limited to 'src/network.c')

diff --git a/src/network.c b/src/network.c
index 1042f80..6dc3dfc 100644
--- a/src/network.c
+++ b/src/network.c
@@ -512,53 +512,21 @@ _filter_by_qtype(const ldns_pkt* lpkt, char** reason)
  * static string.
  */
 static int
-_filter_by_qname(const ldns_pkt* lpkt, char** reason)
+_match_rr(const ldns_rr_list* rrs, char** reason, int* negmatch, int* match, ldns_buffer* buf)
 {
-    int          match    = -1;
-    int          negmatch = -1;
-    ldns_buffer* buf      = ldns_buffer_new(512);
-    if (!buf) {
-        fprintf(stderr, "%s: out of memory", ProgramName);
-        exit(1);
-    }
-
-    /* Look at each section of the message:
-         question, answer, authority, additional */
-    ldns_rr_list* rrs = ldns_pkt_all(lpkt);
-    if (!rrs) {
-        ldns_buffer_free(buf);
-        *reason = "failed to get list of RRs";
-        return -1;
-    }
-
-    /*
-     * Initialize matching counters
-     */
-    myregex_ptr myregex;
-    for (myregex = HEAD(myregexes); myregex != NULL; myregex = NEXT(myregex, link)) {
-        if (myregex->not) {
-            negmatch = 0;
-        } else {
-            match = 0;
-        }
-    }
-
     /* Look at each RR in the section (or each QNAME in
        the question section). */
+    myregex_ptr myregex;
     size_t i, n;
     for (i = 0, n = ldns_rr_list_rr_count(rrs); i < n; i++) {
         ldns_rr* rr = ldns_rr_list_rr(rrs, i);
         if (!rr) {
-            ldns_rr_list_deep_free(rrs);
-            ldns_buffer_free(buf);
             *reason = "failed to get RR";
             return -1;
         }
 
         ldns_buffer_clear(buf);
         if (ldns_rdf2buffer_str(buf, ldns_rr_owner(rr)) != LDNS_STATUS_OK) {
-            ldns_rr_list_deep_free(rrs);
-            ldns_buffer_free(buf);
             *reason = "failed to get RR";
             return -1;
         }
@@ -569,9 +537,9 @@ _filter_by_qname(const ldns_pkt* lpkt, char** reason)
 
             if (regexec(&myregex->reg, (char*)ldns_buffer_begin(buf), 0, NULL, 0) == 0) {
                 if (myregex->not)
-                    negmatch++;
+                    (*negmatch)++;
                 else
-                    match++;
+                    (*match)++;
 
                 if (dumptrace >= 2)
                     fprintf(stderr,
@@ -579,12 +547,54 @@ _filter_by_qname(const ldns_pkt* lpkt, char** reason)
                         (char*)ldns_buffer_begin(buf),
                         myregex->not ? "!" : "",
                         myregex->str,
-                        match,
-                        negmatch);
+                        *match,
+                        *negmatch);
             }
         }
     }
-    ldns_rr_list_deep_free(rrs);
+    return 0;
+}
+
+static int
+_filter_by_qname(const ldns_pkt* lpkt, char** reason)
+{
+    int          match    = -1;
+    int          negmatch = -1;
+    ldns_buffer* buf      = ldns_buffer_new(512);
+    if (!buf) {
+        fprintf(stderr, "%s: out of memory", ProgramName);
+        exit(1);
+    }
+
+    /*
+     * Initialize matching counters
+     */
+    myregex_ptr myregex;
+    for (myregex = HEAD(myregexes); myregex != NULL; myregex = NEXT(myregex, link)) {
+        if (myregex->not) {
+            negmatch = 0;
+        } else {
+            match = 0;
+        }
+    }
+
+    ldns_rr_list* rrs;
+    if ((rrs = ldns_pkt_question(lpkt))) {
+        if (_match_rr(rrs, reason, &negmatch, &match, buf))
+            return -1;
+    }
+    if ((rrs = ldns_pkt_answer(lpkt))) {
+        if (_match_rr(rrs, reason, &negmatch, &match, buf))
+            return -1;
+    }
+    if ((rrs = ldns_pkt_authority(lpkt))) {
+        if (_match_rr(rrs, reason, &negmatch, &match, buf))
+            return -1;
+    }
+    if ((rrs = ldns_pkt_additional(lpkt))) {
+        if (_match_rr(rrs, reason, &negmatch, &match, buf))
+            return -1;
+    }
     ldns_buffer_free(buf);
 
     /*
@@ -1607,10 +1617,12 @@ void network_pkt(const char* descr, my_bpftimeval ts, unsigned pf,
             }
             char* reason = 0;
             if ((match_qtype || nmatch_qtype) && _filter_by_qtype(lpkt, &reason)) {
+                ldns_pkt_free(lpkt);
                 tcpstate_discard(tcpstate, reason);
                 goto network_pkt_end;
             }
             if (!EMPTY(myregexes) && _filter_by_qname(lpkt, &reason)) {
+                ldns_pkt_free(lpkt);
                 tcpstate_discard(tcpstate, reason);
                 goto network_pkt_end;
             }
-- 
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