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/*
This file is part of Kismet
Kismet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kismet is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kismet; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __TCPSERVER_H__
#define __TCPSERVER_H__
#include "config.h"
#include <stdio.h>
#include <string>
#include <time.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
#include <netdb.h>
#include <fcntl.h>
#include <errno.h>
#include <map>
#include <vector>
#include "configfile.h"
// Protocol parameters
#define PROTO_PARMS string& out_string, const vector<int> *field_vec, const void *data
#define TCP_SELECT_TIMEOUT 100
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
/* A structure that holds a command from the client */
struct client_command {
int client_fd;
int stamp;
string cmd;
};
typedef struct server_protocol {
int ref_index;
string header;
int required;
// Double-listed (burns a little extra ram but not much) to make mapping requested
// fields fast.
map<string, int> field_map;
vector<string> field_vec;
int (*printer)(PROTO_PARMS);
void (*enable)(int);
};
// Client options
struct client_opt {
// Map of sentence references to field lists
map<int, vector<int> > protocols;
string wrbuf, cmdbuf;
};
// Allowed IP information
struct client_ipblock {
// Allowed network
in_addr network;
// Allowed mask
in_addr mask;
};
// TCP/IP server to push data to the frontend.
class TcpServer {
public:
TcpServer();
~TcpServer();
int Valid() { return sv_valid; };
int Setup(unsigned int in_max_clients, string bind_addr, short int in_port, vector<client_ipblock *> *in_ipb);
int MergeSet(fd_set in_set, int in_max, fd_set *out_set,
fd_set *outw_set);
int FetchDescriptor() { return serv_fd; }
void Kill(int in_fd);
int Poll(fd_set& in_rset, fd_set& in_wset);
// Send to a specific client, if they support that refnum
int SendToClient(int in_fd, int in_refnum, const void *in_data);
// Send to all clients that support the refnum
int SendToAll(int in_refnum, const void *in_data);
// Use a little bit of indirecton to allow kismet_server to trigger sending
// capabilities after it sends our KISMET headers
int SendMainProtocols(int in_fd, int proto_ref);
void Shutdown();
char *FetchError() { return errstr; }
inline int isClient(int fd) { return FD_ISSET(fd, &client_fds); }
int HandleClient(int fd, client_command *c, fd_set *rds, fd_set *wrs);
// Register an output sentence. This needs:
// * A header (ie, NETWORK)
// * A NULL-terminated array of fields
// * A pointer to a printer that takes a void * and a vector of field numbers
// and outputs a c++ string
// * An optional pointer to a function that takes the file descriptor of a client
// that triggers whatever events should happen the the client enables this kind
// of protocol. (ie, send all networks when the client enables the *NETWORK
// protocol)
// It returns the index number of the sentence added.
int RegisterProtocol(string in_header, int in_required, char **in_fields,
int (*in_printer)(PROTO_PARMS),
void (*in_enable)(int));
int FetchProtocolRef(string in_header);
// How many clients are using this protocol type?
int FetchNumClientRefs(int in_refnum);
// How many clients are connected?
int FetchNumClients();
protected:
void AddProtocolClient(int in_fd, int in_refnum, vector<int> in_fields);
void DelProtocolClient(int in_fd, int in_refnum);
int RawSend(int in_fd, const char *in_data);
int Accept();
int HandleInternalCommand(client_command *in_command);
// Map of reference numbers to sentences
map<int, server_protocol *> protocol_map;
// Map of headers to reference numbers
map<string, int> ref_map;
// Protocols clients are required to support
vector<int> required_protocols;
// Map of protocols to the number of clients using them
map<int, int> client_mapped_protocols;
char errstr[1024];
// Active server
int sv_valid;
unsigned int max_clients;
// Server info
short int port;
char hostname[MAXHOSTNAMELEN];
vector<client_ipblock *> *ipblock_vec;
// Socket items
int serv_fd;
struct sockaddr_in serv_sock;
// Master list of Fd's
fd_set server_fds;
fd_set client_fds;
int max_fd;
map<int, client_opt *> client_optmap;
};
#endif
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