added ssh_message_callback support.

Not fully working yet. User can set his ssh_message_callback, and the function ssh_execute_message_callbacks will call them when appropriate. Messages are correctly stacked (in packet_parse) but no call to ssh_execute_callbacks exists yet.

include/libssh/priv.h

@@ -324,6 +324,8 @@ struct keys_struct {
   const char *publickey;
 };
 
+struct ssh_message;
+
 struct ssh_session {
     struct error_struct error;
     struct socket *socket;
@@ -386,7 +388,8 @@ struct ssh_session {
     /* auths accepted by server */
     int auth_methods;
     int hostkeys; /* contains type of host key wanted by client, in server impl */
-    struct ssh_message *ssh_message; /* ssh message */
+    struct ssh_list *ssh_message_list; /* list of delayed SSH messages */
+    int (*ssh_message_callback)( struct ssh_session *session,struct ssh_message *msg);
     int log_verbosity; /*cached copy of the option structure */
     int log_indent; /* indentation level in enter_function logs */
 };
@@ -737,7 +740,7 @@ const void *_ssh_list_get_head(struct ssh_list *list);
  * @return the first element of the list
  */
 #define ssh_list_get_head(type, ssh_list)\
-  ((type)_ssh_list_head(ssh_list))
+  ((type)_ssh_list_get_head(ssh_list))
 
 
 /* channels1.c */
@@ -760,6 +763,7 @@ int match_hostname(const char *host, const char *pattern, unsigned int len);
 /* messages.c */
 
 void message_handle(SSH_SESSION *session, u32 type);
+int ssh_execute_message_callbacks(SSH_SESSION *session);
 
 /* log.c */
 

include/libssh/server.h

@@ -173,7 +173,8 @@ int ssh_message_channel_request_reply_success(SSH_MESSAGE *msg);
 int ssh_message_service_reply_success(SSH_MESSAGE *msg);
 char *ssh_message_service_service(SSH_MESSAGE *msg);
 
-
+void ssh_set_message_callback(SSH_SESSION *session,
+    int(*ssh_message_callback)(struct ssh_session *session, struct ssh_message *msg));
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */

libssh/messages.c

@@ -3,7 +3,7 @@
  *
  * This file is part of the SSH Library
  *
- * Copyright (c) 2003-2005 by Aris Adamantiadis
+ * Copyright (c) 2003-2009 by Aris Adamantiadis
  *
  * The SSH Library is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -46,18 +46,13 @@
 
 
 static SSH_MESSAGE *message_new(SSH_SESSION *session){
-  SSH_MESSAGE *msg = session->ssh_message;
-
-  if (msg == NULL) {
-    msg = malloc(sizeof(SSH_MESSAGE));
+  SSH_MESSAGE *msg = malloc(sizeof(SSH_MESSAGE));
   if (msg == NULL) {
     return NULL;
   }
-    session->ssh_message = msg;
-  }
+
   memset(msg, 0, sizeof(*msg));
   msg->session = session;
-
   return msg;
 }
 
@@ -815,8 +810,47 @@ void ssh_message_free(SSH_MESSAGE *msg){
 void message_handle(SSH_SESSION *session, u32 type){
   SSH_MESSAGE *msg=ssh_message_retrieve(session,type);
   if(msg){
-    /* TODO store msg somewhere */
+    if(!session->ssh_message_list){
+      session->ssh_message_list=ssh_list_new();
     }
+    ssh_list_add(session->ssh_message_list,msg);
+  }
+}
+
+/** @brief defines the SSH_MESSAGE callback
+ * @param session the current ssh session
+ * @param ssh_message_callback a function pointer to a callback taking the
+ * current ssh session and received message as parameters. the function returns
+ * 0 if the message has been parsed and treated sucessfuly, 1 otherwise (libssh
+ * must take care of the response).
+ */
+void ssh_set_message_callback(SSH_SESSION *session,
+    int(*ssh_message_callback)(struct ssh_session *session, struct ssh_message *msg)){
+  session->ssh_message_callback=ssh_message_callback;
+}
+
+int ssh_execute_message_callbacks(SSH_SESSION *session){
+  SSH_MESSAGE *msg=NULL;
+  int ret;
+  if(!session->ssh_message_list)
+    return SSH_OK;
+  if(session->ssh_message_callback){
+    while((msg=ssh_list_get_head(SSH_MESSAGE *, session->ssh_message_list)) != NULL){
+      ret=session->ssh_message_callback(session,msg);
+      if(ret==1){
+        ret = ssh_message_reply_default(msg);
+        if(ret != SSH_OK)
+          return ret;
+      }
+    }
+  } else {
+    while((msg=ssh_list_get_head(SSH_MESSAGE *, session->ssh_message_list)) != NULL){
+      ret = ssh_message_reply_default(msg);
+      if(ret != SSH_OK)
+        return ret;
+    }
+  }
+  return SSH_OK;
 }
 /**
  * @}

libssh/packet.c

@@ -753,6 +753,9 @@ static int packet_wait2(SSH_SESSION *session, int type, int blocking) {
       case SSH2_MSG_CHANNEL_REQUEST:
       case SSH2_MSG_CHANNEL_EOF:
       case SSH2_MSG_CHANNEL_CLOSE:
+      case SSH2_MSG_SERVICE_REQUEST:
+      case SSH2_MSG_USERAUTH_REQUEST:
+      case SSH2_MSG_CHANNEL_OPEN:
         packet_parse(session);
         break;
       case SSH2_MSG_IGNORE:

libssh/session.c

@@ -125,7 +125,14 @@ void ssh_cleanup(SSH_SESSION *session) {
 
   privatekey_free(session->dsa_key);
   privatekey_free(session->rsa_key);
-  ssh_message_free(session->ssh_message);
+  if(session->ssh_message_list){
+    SSH_MESSAGE *msg;
+    while((msg=ssh_list_get_head(SSH_MESSAGE *,session->ssh_message_list))
+        != NULL){
+      ssh_message_free(msg);
+    }
+    ssh_list_free(session->ssh_message_list);
+  }
   ssh_options_free(session->options);
 
   /* burn connection, it could hang sensitive datas */