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Receive and send SSH_MSG_UNIMPLEMENTED

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This commit is contained in:
Aris Adamantiadis
2010-07-18 00:39:51 +02:00
parent 8c08b062d0
commit a924869096
2 changed files with 36 additions and 2 deletions
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2
include/libssh/packet.h
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@@ -53,6 +53,8 @@ int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user
#endif #endif
SSH_PACKET_CALLBACK(ssh_packet_unimplemented);
int ssh_packet_send_unimplemented(ssh_session session, uint32_t seqnum);
int ssh_packet_parse_type(ssh_session session); int ssh_packet_parse_type(ssh_session session);
int packet_flush(ssh_session session, int enforce_blocking); int packet_flush(ssh_session session, int enforce_blocking);

36
libssh/packet.c
View File

@@ -49,7 +49,7 @@
ssh_packet_callback default_packet_handlers[]= { ssh_packet_callback default_packet_handlers[]= {
ssh_packet_disconnect_callback, // SSH2_MSG_DISCONNECT 1 ssh_packet_disconnect_callback, // SSH2_MSG_DISCONNECT 1
ssh_packet_ignore_callback, // SSH2_MSG_IGNORE 2 ssh_packet_ignore_callback, // SSH2_MSG_IGNORE 2
NULL, // SSH2_MSG_UNIMPLEMENTED 3 ssh_packet_unimplemented, // SSH2_MSG_UNIMPLEMENTED 3
ssh_packet_ignore_callback, // SSH2_MSG_DEBUG 4 ssh_packet_ignore_callback, // SSH2_MSG_DEBUG 4
ssh_packet_service_request, // SSH2_MSG_SERVICE_REQUEST 5 ssh_packet_service_request, // SSH2_MSG_SERVICE_REQUEST 5
ssh_packet_service_accept, // SSH2_MSG_SERVICE_ACCEPT 6 ssh_packet_service_accept, // SSH2_MSG_SERVICE_ACCEPT 6
@@ -355,12 +355,44 @@ void ssh_packet_process(ssh_session session, uint8_t type){
if(r==SSH_PACKET_USED) if(r==SSH_PACKET_USED)
break; break;
} }
if(r==SSH_PACKET_NOT_USED) if(r==SSH_PACKET_NOT_USED){
ssh_log(session,SSH_LOG_RARE,"Couldn't do anything with packet type %d",type); ssh_log(session,SSH_LOG_RARE,"Couldn't do anything with packet type %d",type);
ssh_packet_send_unimplemented(session, session->recv_seq-1);
}
error: error:
leave_function(); leave_function();
} }
/** @internal
* @brief sends a SSH_MSG_UNIMPLEMENTED answer to an unhandled packet
* @param session the SSH session
* @param seqnum the sequence number of the unknown packet
* @return SSH_ERROR on error, else SSH_OK
*/
int ssh_packet_send_unimplemented(ssh_session session, uint32_t seqnum){
int r;
enter_function();
buffer_add_u8(session->out_buffer, SSH2_MSG_UNIMPLEMENTED);
buffer_add_u32(session->out_buffer, htonl(seqnum));
r = packet_send(session);
leave_function();
return r;
}
/** @internal
* @brief handles a SSH_MSG_UNIMPLEMENTED packet
*/
SSH_PACKET_CALLBACK(ssh_packet_unimplemented){
uint32_t seq;
(void)type;
(void)user;
buffer_get_u32(packet,&seq);
seq=ntohl(seq);
ssh_log(session,SSH_LOG_RARE,
"Received SSH_MSG_UNIMPLEMENTED (sequence number %d)",seq);
return SSH_PACKET_USED;
}
/** @internal /** @internal
* @parse the "Type" header field of a packet and updates the session * @parse the "Type" header field of a packet and updates the session
*/ */