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/* scut's leet network library ;)
* 1999 (c) scut
*
* networking code
*/
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <stdio.h>
#ifndef _NETWORK_H
#define _NETWORK_H
#define NET_READTIMEOUT 180
#define NET_CONNTIMEOUT 60
#define NET_IDENTTIMEOUT 15
#define IFI_NAME 16
#define IFI_HADDR 8
/* pointer to this struct list returned by net_get_ifi
*/
struct ifi_info {
char ifi_name[IFI_NAME];
u_char ifi_haddr[IFI_HADDR];
u_short ifi_hlen;
short ifi_flags;
short ifi_myflags;
struct sockaddr *ifi_addr;
struct in_addr ifi_saddr;
struct ifi_info *ifi_next;
};
#define IFI_ALIAS 1
typedef struct bound {
int bs; /* bound socket */
unsigned short port; /* port we bound to */
struct sockaddr bsa; /* bs_in */
} bound;
extern int net_readtimeout;
extern int net_conntimeout;
extern int net_identtimeout;
/* net_socks_connect
*
* relays through an open socks 5 server (NO AUTH type)
* returns a socket descriptor which is already connected
*/
int net_socks_connect (char *socks, unsigned short int sport, char *server, unsigned short int port, int sec);
/* net_socks_put_s5info
*
* inserts socks 5 compatible relay information into socket s5s,
* used to relay over more then just one socks server
*/
int net_socks_put_s5info (int s5s, char *server, unsigned short int port, int sec);
/* net_parseip
*
* reads an ip in the format "1.1.1.1:299" or "blabla:481" into
* the char pointer *ip and into the port *port
*
* returns 0 on failure
* returns 1 on success
*/
int net_parseip (char *inp, char **ip, unsigned short int *port);
/* net_getlocalip
*
* returns the local IP address as string on success
* returns NULL on failure
*/
char *net_getlocalip (void);
/* net_descriptify
*
* descriptifies a socket ;)
* returns -1 on failure
* returns file descriptor on success
*/
FILE *net_descriptify (int socket);
/* net_ident
*
* idents a connection identified by the host:port pairs on both sides,
* returning the ident in *ident
*
* returns 1 on success
* returns -1 on failure
*/
int net_ident (char **ident, struct sockaddr_in *locals, unsigned short int localport,
struct sockaddr_in *remotes, unsigned short int remoteport);
/* net_accept
* accepts a connection from socket s, and stores the connection
* into cs.
* wait a maximum amount of maxsec seconds for connections
* maxsec can also be zero (infinite wait, until connection)
*
* returns 0 if no connection has been made within maxsec seconds
* returns -1 if an error appears
* returns the socket number if a connection has been made
*/
int net_accept (int s, struct sockaddr_in *cs, int maxsec);
/* net_get_ifi
* get interface information
* returns NULL on failure
* returns a pointer to a linked list structure ifi_info (see above)
*/
struct ifi_info *net_ifi_get (int family, int doaliases);
void net_ifi_free (struct ifi_info *tf);
/* net_testvip
* tests if virtual ip/hostname is available for use on the local machine,
* returns 1 if the ip can be used
* 0 if the ip/host is not available
*/
int net_testvip (char *ip);
/* net_bind
* binds a socket to an ip:port on the local machine,
* ip can be either NULL (bind to all IP's on the host), or a pointer
* to a virtual host name, or a real IP, or "*" for any.
* port can be either 0 (ephemeral port), or any free port.
*
* returns NULL on failure
* pointer to bound structure on success
*/
bound *net_bind (char *ip, unsigned short int port);
void net_boundfree (bound *bf);
/* net_resolve
* resolves host into s_addr
*/
unsigned long int net_resolve(char *host);
/* net_connect
* connects to the given server and port with a max timeout of sec
* initializes the sockaddr_in struct correctly (ipv4), accepts any
* ip "123.123.123.123" or hostname "localhost", "www.yahoo.de" as hostname
* creates a new socket and returns either -1 if failed or
* the socket if connection has been established within the timeout limit
* routine is still IPv4 biased :-/
*
* returns -1 on failure
* returns socket if success
*/
int net_connect(struct sockaddr_in *cs, char *server, unsigned short int port, int sec);
/* net_rtimeout
* waits max <sec> seconds for fd to become readable
* returns -1 on error (errno set)
* returns 1 on readability
*/
int net_rtimeout(int fd, int sec);
/* net_rbuf
* allocates memory and reads to *dst until connection close
* returns n if success (n = number of bytes read)
* returns -1 if failed
*/
long int net_rbuf(int fd, char **dst);
#define NET_BSIZE 4096
/* net_rbuft
* reads dsize bytes into dst from fd, with timeout
* returns 1 on success
* returns -1 on failure
*/
int net_rbuft(int fd, char *dst, unsigned long int dsize);
/* net_rlinet
* reads a line from socket descriptor with timeout to buffer
* if sec = 0, then only a continuous stream of data is required, not
* an overall timeout.
* returns -1 on timeout
* returns 0 on connection close
* returns length of readen line (including '\n')
*/
int net_rlinet(int fd, char *buf, int bufsize, int sec);
/* net_tline
* returns length if string contains '\n'
* returns -1 if no '\n' in string
*/
int net_tline(char *buf, int bufsize);
/* net_write
* prints a formatted string to a socket
*/
void net_write(int fd, const char *str, ...);
#endif
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