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Handle global requests and reverse forwarding

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This commit is contained in:
milo
2010-09-29 17:45:04 +02:00
committed by Aris Adamantiadis
parent c4356531f7
commit 26d40b5354
7 changed files with 242 additions and 2 deletions
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87
src/messages.c
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@@ -39,6 +39,9 @@
#include "libssh/keys.h"
#include "libssh/dh.h"
#include "libssh/messages.h"
#if WITH_SERVER
#include "libssh/server.h"
#endif
/**
* @defgroup libssh_messages The SSH message functions
@@ -64,6 +67,85 @@ static ssh_message ssh_message_new(ssh_session session){
return msg;
}
SSH_PACKET_CALLBACK(ssh_packet_global_request){
ssh_message msg = NULL;
ssh_string request_s=NULL;
char *request=NULL;
ssh_string bind_addr_s=NULL;
char *bind_addr=NULL;
uint32_t bind_port;
uint8_t want_reply;
(void)user;
(void)type;
(void)packet;
request_s = buffer_get_ssh_string(packet);
if (request_s != NULL) {
request = ssh_string_to_char(request_s);
ssh_string_free(request_s);
}
buffer_get_u8(packet, &want_reply);
ssh_log(session,SSH_LOG_PROTOCOL,"Received SSH_MSG_GLOBAL_REQUEST packet");
msg = ssh_message_new(session);
msg->type = SSH_REQUEST_GLOBAL;
if(!strcmp(request, "tcpip-forward")) {
bind_addr_s = buffer_get_ssh_string(packet);
if (bind_addr_s != NULL) {
bind_addr = ssh_string_to_char(bind_addr_s);
ssh_string_free(bind_addr_s);
}
buffer_get_u32(packet, &bind_port);
bind_port = ntohl(bind_port);
msg->global_request.type = SSH_GLOBAL_REQUEST_TCPIP_FORWARD;
msg->global_request.want_reply = want_reply;
msg->global_request.bind_address = bind_addr;
msg->global_request.bind_port = bind_port;
ssh_log(session, SSH_LOG_PROTOCOL, "Received SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request, want_reply, bind_addr, bind_port);
if(ssh_callbacks_exists(session->callbacks, global_request_function)) {
ssh_log(session, SSH_LOG_PROTOCOL, "Calling callback for SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request, want_reply, bind_addr, bind_port);
session->callbacks->global_request_function(session, msg, session->callbacks->userdata);
} else {
ssh_message_reply_default(msg);
}
} else if(!strcmp(request, "cancel-tcpip-forward")) {
bind_addr_s = buffer_get_ssh_string(packet);
if (bind_addr_s != NULL) {
bind_addr = ssh_string_to_char(bind_addr_s);
ssh_string_free(bind_addr_s);
}
buffer_get_u32(packet, &bind_port);
bind_port = ntohl(bind_port);
msg->global_request.type = SSH_GLOBAL_REQUEST_CANCEL_TCPIP_FORWARD;
msg->global_request.want_reply = want_reply;
msg->global_request.bind_address = bind_addr;
msg->global_request.bind_port = bind_port;
ssh_log(session, SSH_LOG_PROTOCOL, "Received SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request, want_reply, bind_addr, bind_port);
if(ssh_callbacks_exists(session->callbacks, global_request_function)) {
session->callbacks->global_request_function(session, msg, session->callbacks->userdata);
} else {
ssh_message_reply_default(msg);
}
} else {
ssh_log(session, SSH_LOG_PROTOCOL, "UNKNOWN SSH_MSG_GLOBAL_REQUEST %s %d", request, want_reply);
}
SAFE_FREE(msg);
SAFE_FREE(request);
SAFE_FREE(bind_addr);
return SSH_PACKET_USED;
}
SSH_PACKET_CALLBACK(ssh_packet_service_request){
ssh_string service = NULL;
char *service_c = NULL;
@@ -763,6 +845,8 @@ int ssh_message_subtype(ssh_message msg) {
return msg->channel_request_open.type;
case SSH_REQUEST_CHANNEL:
return msg->channel_request.type;
case SSH_REQUEST_GLOBAL:
return msg->global_request.type;
}
return -1;
@@ -798,6 +882,9 @@ void ssh_message_free(ssh_message msg){
case SSH_REQUEST_SERVICE:
SAFE_FREE(msg->service_request.service);
break;
case SSH_REQUEST_GLOBAL:
SAFE_FREE(msg->global_request.bind_address);
break;
}
ZERO_STRUCTP(msg);
SAFE_FREE(msg);