ss-local: improve verbose logging; print hit of missing option

src/local.c

@@ -353,7 +353,7 @@ server_handshake(EV_P_ ev_io *w, buffer_t *buf)
         }
         return server_handshake_reply(EV_A_ w, 1, &response);
     } else if (request->cmd != SOCKS5_CMD_CONNECT) {
-        LOGE("unsupported cmd: %d", request->cmd);
+        LOGE("unsupported command: %d", request->cmd);
         response.rep = SOCKS5_REP_CMD_NOT_SUPPORTED;
         char *send_buf = (char *)&response;
         send(server->fd, send_buf, 4, 0);
@@ -876,6 +876,13 @@ server_recv_cb(EV_P_ ev_io *w, int revents)
             // all processed
             return;
         } else if (server->stage == STAGE_INIT) {
+            if(verbose) {
+                struct sockaddr_in peer_addr;
+                socklen_t peer_addr_len = sizeof peer_addr;
+                if(getpeername(server->fd, (struct sockaddr *)&peer_addr, &peer_addr_len) == 0) {
+                    LOGI("connection from %s:%hu", inet_ntoa(peer_addr.sin_addr), ntohs(peer_addr.sin_port));
+                }
+            }
             if (buf->len < 1)
                 return;
             if (buf->data[0] != SVERSION) {
@@ -1359,6 +1366,11 @@ create_remote(listen_ctx_t *listener,
     memcpy(&(remote->addr), remote_addr, remote->addr_len);
     remote->direct = direct;
 
+    if(verbose) {
+        struct sockaddr_in *sockaddr = (struct sockaddr_in *)&remote->addr;
+        LOGI("remote: %s:%hu", inet_ntoa(sockaddr->sin_addr), ntohs(sockaddr->sin_port));
+    }
+
     return remote;
 }
 
@@ -1685,12 +1697,22 @@ main(int argc, char **argv)
         }
     }
 
-    if (remote_num == 0 || remote_port == NULL ||
+    if(remote_num == 0) {
+        fprintf(stderr, "remote_num is 0\n");
+        exit(EXIT_FAILURE);
+    }
+    if(!remote_port) {
+        fprintf(stderr, "remote_port is NULL\n");
+        exit(EXIT_FAILURE);
+    }
 #ifndef HAVE_LAUNCHD
-        local_port == NULL ||
+    if(!local_port) {
+        fprintf(stderr, "local_port is NULL\n");
+        exit(EXIT_FAILURE);
+    }
 #endif
-        (password == NULL && key == NULL)) {
-        usage();
+    if(!password && !key) {
+        fprintf(stderr, "both password and key are NULL\n");
         exit(EXIT_FAILURE);
     }