4 files changed, 29 insertions, 20 deletions
diff --git a/src/cfg_parse.y b/src/cfg_parse.y
index fb6d97b..a18abd5 100644
--- a/src/cfg_parse.y
+++ b/src/cfg_parse.y
@@ -39,7 +39,7 @@ void yyerror(const char *);
 int yylex(void);
 
 int line_cnt = 1;
-options_t* gopt;
+const char* config_file_;
 listeners_t* glisteners;
 
 struct listener {
@@ -122,9 +122,9 @@ static void merge_listener_struct(struct listener* dest, struct listener* src)
 }
 
 
-void yyinit(options_t* opt, listeners_t* listeners)
+void yyinit(const char* config_file, listeners_t* listeners)
 {
-  gopt = opt;
+  config_file_ = config_file;
   glisteners = listeners;
 }
 
@@ -167,8 +167,10 @@ void yyinit(options_t* opt, listeners_t* listeners)
 %type <rtype> resolv_type
 %type <string> service
 %type <string> host_or_addr
-%%
 
+%error-verbose
+
+%%
 cfg: 
                | cfg listen
                ;
@@ -180,10 +182,7 @@ listen:          listen_head TOK_OPEN listen_body TOK_CLOSE TOK_SEMICOLON
   int ret = listener_add(glisteners, $1->la_, $1->lrt_, $1->lp_, $1->ra_, $1->rrt_, $1->rp_, $1->sa_);
   clear_listener_struct($1);
   if(ret) {
-    listener_clear(glisteners);
-    options_clear(gopt);
-    log_close();
-    exit(-1);
+    YYABORT;
   }
 }
 ;
@@ -269,10 +268,6 @@ host_or_addr:    TOK_NUMBER
 
 void yyerror (const char *string)
 {
-  log_printf(ERROR, "%s:%d %s\n", gopt->config_file_, line_cnt, string);
-  listener_clear(glisteners);
-  options_clear(gopt);
-  log_close();
-  exit(1);
+  log_printf(ERROR, "%s:%d %s\n", config_file_, line_cnt, string);
 }
 
diff --git a/src/listener.c b/src/listener.c
index 493b15d..9f54d26 100644
--- a/src/listener.c
+++ b/src/listener.c
@@ -71,6 +71,10 @@ int listener_add(listeners_t* list, const char* laddr, resolv_type_t lrt, const
   if(!list)
     return -1;
 
+  if(!lport) { log_printf(ERROR, "no local port specified"); return -1; }
+  if(!raddr) { log_printf(ERROR, "no remote address specified"); return -1; }
+  if(!rport) { log_printf(ERROR, "no remote port specified"); return -1; }
+
 // TODO: what if more than one address is returned here? 
   struct addrinfo* re = tcp_resolve_endpoint(raddr, rport, rrt, 0);
   if(!re)
diff --git a/src/options.c b/src/options.c
index bc49a44..b905426 100644
--- a/src/options.c
+++ b/src/options.c
@@ -219,6 +219,11 @@ int options_parse(options_t* opt, int argc, char* argv[])
     string_list_add(&opt->log_targets_, "syslog:3,tcpproxy,daemon");
   }
 
+  if(!opt->local_port_ && !opt->config_file_) {
+    opt->config_file_ = strdup(CONFFILE);
+    if(!opt->config_file_) return -2;
+  }
+
   return 0;
 }
 
@@ -227,6 +232,10 @@ void options_parse_post(options_t* opt)
   if(!opt)
     return;
 
+  if(opt->config_file_ && opt->local_port_) {
+    log_printf(WARNING, "local port and config file specified, will ignore config file");
+  }
+
   if(opt->buffer_size_ <= 0) {
     log_printf(WARNING, "illegal buffer size %d using default buffer size", opt->buffer_size_);
     opt->buffer_size_ = 10 * 1024;
@@ -251,7 +260,7 @@ void options_default(options_t* opt)
   opt->rresolv_type_ = ANY;
   opt->remote_port_ = NULL;
   opt->source_addr_ = NULL;
-  opt->config_file_ = strdup(CONFFILE);
+  opt->config_file_ = NULL;
   string_list_init(&opt->log_targets_);
   opt->buffer_size_ = 10 * 1024;
   opt->debug_ = 0;
diff --git a/src/tcpproxy.c b/src/tcpproxy.c
index 57d86b3..3e30338 100644
--- a/src/tcpproxy.c
+++ b/src/tcpproxy.c
@@ -41,7 +41,7 @@
 #include "clients.h"
 
 extern FILE *yyin;
-extern void yyinit(options_t* opt, listeners_t* listeners);
+extern void yyinit(const char* config_file, listeners_t* listeners);
 extern int yyparse(void);
 
 
@@ -169,11 +169,12 @@ int main(int argc, char* argv[])
       exit(-1);
     }
     
-    yyinit(&opt, &listeners);
-    yyparse();
-
-    if(!slist_length(&listeners)) {
-      log_printf(ERROR, "no listeners defined in config file %s", opt.config_file_);
+    yyinit(opt.config_file_, &listeners);
+    int ret = yyparse();
+    fclose(yyin);
+    if(ret || !slist_length(&listeners)) {
+      if(!ret)
+        log_printf(ERROR, "no listeners defined in config file %s", opt.config_file_);
       listener_clear(&listeners);
       options_clear(&opt);
       log_close();