1 files changed, 19 insertions, 0 deletions
diff --git a/broadd.c b/broadd.c
index 3f63695..c5a8dbf 100644
--- a/broadd.c
+++ b/broadd.c
@@ -6,6 +6,8 @@
 ---------- RATE_LIMIT_S   -> rate limit expiry window
 ---------- CLIENT_TIMEOUT -> how long to wait before evicting a udp client
 ---------- WILDCARD       -> whether or not to enable wildcard. set to 0 or 1.
+---------- RELAY_TXT      -> read a pre-determined list of relays and connect to them at startup.
+-------------- format is one relay per line, `<ip> <port>`
 ------ difference:
 ---------- udp mode does not send m_ok or p_ok
 ---------- send `N\n` to initiate connection in udp mode
@@ -590,6 +592,23 @@ int main(int argc, char** argv) {
     fds[ 1 ].fd     = STDIN_FILENO;
     fds[ 1 ].events = POLLIN;
 
+    // parse relays.txt file
+    const char* rpath = getenv("RELAY_TXT");
+    if (rpath) {
+        FILE* f = fopen(rpath, "r");
+        if (f) {
+            char line[ 256 ];
+            while (fgets(line, sizeof(line), f)) {
+                char ip[ 64 ], port[ 16 ];
+                if (sscanf(line, "%63s %15s", ip, port) != 2) continue;
+                connect_relay(ip, port);
+            }
+            fclose(f);
+        } else {
+            perror("unable to open RELAY_TXT");
+        }
+    }
+
     while (1) {
         int run_shutdown = 0;
         int got_msg      = 0;