* should be a good limit to make processing simpler. */
#define MAX_REQUEST_LINE 4096
+/* Format string used to send HTTP/1.0 error responses to the client.
+ *
+ * %s is used 4 times, first three are the error code (no %n$s!), the last is
+ * the message. */
+#define HTTP_RESPONSE_FORMAT "HTTP/1.0 %s\r\n\
+Content-Type: text/html; charset=US-ASCII\r\n\
+\r\n\
+<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n\
+<html>\n\
+<head><title>%s</title></head>\n\
+<body>\n\
+<h1>%s</h1>\n\
+<p>%s</p>\n\
+</body>\n\
+</html>\n"
+
static int initialize_tls_session_client(int peer_socket,
const char *hostname,
}
static void send_bad_request(FILE *client_fd) {
- fprintf(client_fd, "HTTP/1.0 400 Bad Request\r\n");
- fprintf(client_fd, "\r\n");
+#define RESPONSE_ERROR "400 Bad Request"
+#define RESPONSE_MSG "Your browser sent an invalid request."
+ fprintf(client_fd, HTTP_RESPONSE_FORMAT,
+ RESPONSE_ERROR, RESPONSE_ERROR, RESPONSE_ERROR,
+ RESPONSE_MSG);
+#undef RESPONSE_ERROR
+#undef RESPONSE_MSG
}
static void send_forwarding_failure(FILE *client_fd) {
- fprintf(client_fd, "HTTP/1.0 503 Forwarding failure\r\n");
- fprintf(client_fd, "\r\n");
+#define RESPONSE_ERROR "503 Forwarding failure"
+#define RESPONSE_MSG "Failed to connect to server, check logs."
+ fprintf(client_fd, HTTP_RESPONSE_FORMAT,
+ RESPONSE_ERROR, RESPONSE_ERROR, RESPONSE_ERROR,
+ RESPONSE_MSG);
+#undef RESPONSE_ERROR
+#undef RESPONSE_MSG
}
static void tls_send_invalid_cert_message(gnutls_session_t session) {
- gnutls_record_send(session, "HTTP/1.0 500 Internal Server Error\r\n", 36);
- gnutls_record_send(session, "\r\n", 2);
+#define RESPONSE_ERROR "500 Internal Server Error"
+#define RESPONSE_MSG "Server certificate validation failed, check logs."
+
+ char buffer[sizeof(HTTP_RESPONSE_FORMAT) - 1 /* '\0' */
+ - 4 * 2 /* four %s */
+ + (sizeof(RESPONSE_ERROR) - 1 /* '\0' */) * 3
+ + sizeof(RESPONSE_MSG) - 1 /* '\0' */
+ + 1 /* '\0' */];
+
+ snprintf(buffer, sizeof(buffer),
+ HTTP_RESPONSE_FORMAT,
+ RESPONSE_ERROR, RESPONSE_ERROR, RESPONSE_ERROR, RESPONSE_MSG);
+
+ gnutls_record_send(session, buffer, sizeof(buffer) - 1);
+ /* don't send trailing '\0' */
+#undef RESPONSE_ERROR
+#undef RESPONSE_MSG
}
ruderich.org/simon / tlsproxy / tlsproxy.git / commitdiff