1 files changed, 62 insertions, 0 deletions
diff --git a/utils/backend_socket_log.c b/utils/backend_socket_log.c
new file mode 100644
index 00000000..783cca31
--- /dev/null
+++ b/utils/backend_socket_log.c
@@ -0,0 +1,62 @@
+#include <assert.h>
+#include <string.h>
+
+#include "putty.h"
+#include "network.h"
+
+void backend_socket_log(Seat *seat, LogContext *logctx,
+                        PlugLogType type, SockAddr *addr, int port,
+                        const char *error_msg, int error_code, Conf *conf,
+                        bool session_started)
+{
+    char addrbuf[256], *msg;
+
+    switch (type) {
+      case PLUGLOG_CONNECT_TRYING:
+        sk_getaddr(addr, addrbuf, lenof(addrbuf));
+        if (sk_addr_needs_port(addr)) {
+            msg = dupprintf("Connecting to %s port %d", addrbuf, port);
+        } else {
+            msg = dupprintf("Connecting to %s", addrbuf);
+        }
+        break;
+      case PLUGLOG_CONNECT_FAILED:
+        sk_getaddr(addr, addrbuf, lenof(addrbuf));
+        msg = dupprintf("Failed to connect to %s: %s", addrbuf, error_msg);
+        break;
+      case PLUGLOG_CONNECT_SUCCESS:
+        if (addr)
+            sk_getaddr(addr, addrbuf, lenof(addrbuf));
+        else /* fallback if address unavailable */
+            sprintf(addrbuf, "remote host");
+        msg = dupprintf("Connected to %s", addrbuf);
+        break;
+      case PLUGLOG_PROXY_MSG: {
+        /* Proxy-related log messages have their own identifying
+         * prefix already, put on by our caller. */
+        int len, log_to_term;
+
+        /* Suffix \r\n temporarily, so we can log to the terminal. */
+        msg = dupprintf("%s\r\n", error_msg);
+        len = strlen(msg);
+        assert(len >= 2);
+
+        log_to_term = conf_get_int(conf, CONF_proxy_log_to_term);
+        if (log_to_term == AUTO)
+            log_to_term = session_started ? FORCE_OFF : FORCE_ON;
+        if (log_to_term == FORCE_ON)
+            seat_stderr(seat, msg, len);
+
+        msg[len-2] = '\0';         /* remove the \r\n again */
+        break;
+      }
+      default:
+        msg = NULL;  /* shouldn't happen, but placate optimiser */
+        break;
+    }
+
+    if (msg) {
+        logevent(logctx, msg);
+        sfree(msg);
+    }
+}