chainparams: added backup dns seed

.github/workflows/ci.yml

@@ -81,7 +81,7 @@ jobs:
             goal: install
           - name: x86_64-macos
             host: x86_64-apple-darwin15
-            os: macos-12
+            os: macos-13
             run-tests: true
             dep-opts: "SPEED=slow V=1"
             config-opts: "--enable-static --disable-shared --enable-test-passwd"

src/chainparams.c

@@ -41,7 +41,7 @@ const dogecoin_chainparams dogecoin_chainparams_main = {
     {0x91, 0x56, 0x35, 0x2c, 0x18, 0x18, 0xb3, 0x2e, 0x90, 0xc9, 0xe7, 0x92, 0xef, 0xd6, 0xa1, 0x1a, 0x82, 0xfe, 0x79, 0x56, 0xa6, 0x30, 0xf0, 0x3b, 0xbe, 0xe2, 0x36, 0xce, 0xda, 0xe3, 0x91, 0x1a},
     {0x10, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
     22556,
-    {{"seed.multidoge.org"}, {{1}}},
+    {{"seed.multidoge.org"}, {{"seed2.multidoge.org"}}},
     true,
     0x0062,
     {0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, // pow limit

src/net.c

@@ -833,21 +833,29 @@ dogecoin_bool dogecoin_node_group_add_peers_by_ip_or_seed(dogecoin_node_group *g
     if (ips == NULL) {
         /* === DNS QUERY === */
         vector* ips_dns = vector_new(10, free);
-        const dogecoin_dns_seed seed = group->chainparams->dnsseeds[0];
-        if (strlen(seed.domain) == 0) {
-            return false;
-        }
-        /* todo: make sure we have enough peers, eventually */
-        dogecoin_get_peers_from_dns(seed.domain, ips_dns, group->chainparams->default_port, AF_INET);
-        unsigned int i;
-        for (i = 0; i < ips_dns->len; i++) {
-            char* ip = (char*)vector_idx(ips_dns, i);
-
-            /* create a node */
-            dogecoin_node* node = dogecoin_node_new();
-            if (dogecoin_node_set_ipport(node, ip) > 0) {
-                /* add the node to the group */
-                dogecoin_node_group_add_node(group, node);
+        unsigned int seed_index;
+        /* dogecoin_chainparams has up to 8 dns seeds */
+        for (seed_index = 0; seed_index < 8; seed_index++) {
+            const dogecoin_dns_seed seed = group->chainparams->dnsseeds[seed_index];
+            if (strlen(seed.domain) == 0) {
+                continue;
+            }
+            /* todo: make sure we have enough peers, eventually */
+            dogecoin_get_peers_from_dns(seed.domain, ips_dns, group->chainparams->default_port, AF_INET);
+            unsigned int i;
+            for (i = 0; i < ips_dns->len; i++) {
+                char* ip = (char*)vector_idx(ips_dns, i);
+
+                /* create a node */
+                dogecoin_node* node = dogecoin_node_new();
+                if (dogecoin_node_set_ipport(node, ip) > 0) {
+                    /* add the node to the group */
+                    dogecoin_node_group_add_node(group, node);
+                }
+            }
+            /* exit if we get peers from a seed */
+            if (ips_dns->len > 0) {
+                break;
             }
         }
         vector_free(ips_dns, true);

test/net_tests.c

@@ -198,13 +198,22 @@ void test_net_basics_plus_download_block()
 {
 
     vector *ips = vector_new(10, free);
-    const dogecoin_dns_seed seed = dogecoin_chainparams_test.dnsseeds[0];
-
-    dogecoin_get_peers_from_dns(seed.domain, ips, dogecoin_chainparams_test.default_port, AF_INET);
-    unsigned int i;
-    for (i = 0; i < ips->len; i++)
-    {
-        debug_print("dns seed ip %d: %s\n", i, (char *)vector_idx(ips, i));
+    unsigned int seed_index;
+    /* dogecoin_chainparams has up to 8 dns seeds */
+    for (seed_index = 0; seed_index < 8; seed_index++) {
+        const dogecoin_dns_seed seed = dogecoin_chainparams_test.dnsseeds[seed_index];
+        if (strlen(seed.domain) == 0) {
+            continue;
+        }
+        dogecoin_get_peers_from_dns(seed.domain, ips, dogecoin_chainparams_test.default_port, AF_INET);
+        unsigned int i;
+        for (i = 0; i < ips->len; i++) {
+            debug_print("dns seed ip %d: %s\n", i, (char *)vector_idx(ips, i));
+        }
+        /* exit if we get peers from a seed */
+        if (ips->len > 0) {
+            break;
+        }
     }
     vector_free(ips, true);