mirror of
https://repo.or.cz/socat.git
synced 2024-12-22 23:42:34 +00:00
215 lines
10 KiB
C
215 lines
10 KiB
C
/* source: xio-tun.c */
|
|
/* Copyright Gerhard Rieger 2007 */
|
|
/* Published under the GNU General Public License V.2, see file COPYING */
|
|
|
|
/* this file contains the source for opening addresses of tun/tap type */
|
|
|
|
#include "xiosysincludes.h"
|
|
#if WITH_TUN
|
|
#include "xioopen.h"
|
|
|
|
#include "xio-named.h"
|
|
#include "xio-socket.h"
|
|
#include "xio-ip.h"
|
|
|
|
#include "xio-tun.h"
|
|
|
|
|
|
static int xioopen_tun(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *fd, unsigned groups, int dummy1, int dummy2, int dummy3);
|
|
|
|
#define XIO_OFFSETOF(x) ((size_t)&((xiosingle_t *)0)->x)
|
|
|
|
/****** TUN addresses ******/
|
|
const struct optdesc opt_tun_device = { "tun-device", NULL, OPT_TUN_DEVICE, GROUP_TUN, PH_OPEN, TYPE_FILENAME, OFUNC_SPEC };
|
|
const struct optdesc opt_tun_name = { "tun-name", NULL, OPT_TUN_NAME, GROUP_INTERFACE, PH_FD, TYPE_STRING, OFUNC_SPEC };
|
|
const struct optdesc opt_tun_type = { "tun-type", NULL, OPT_TUN_TYPE, GROUP_INTERFACE, PH_FD, TYPE_STRING, OFUNC_SPEC };
|
|
const struct optdesc opt_iff_no_pi = { "iff-no-pi", "no-pi", OPT_IFF_NO_PI, GROUP_TUN, PH_FD, TYPE_BOOL, OFUNC_SPEC };
|
|
/*0 const struct optdesc opt_interface_addr = { "interface-addr", "address", OPT_INTERFACE_ADDR, GROUP_INTERFACE, PH_FD, TYPE_STRING, OFUNC_SPEC };*/
|
|
/*0 const struct optdesc opt_interface_netmask = { "interface-netmask", "netmask", OPT_INTERFACE_NETMASK, GROUP_INTERFACE, PH_FD, TYPE_STRING, OFUNC_SPEC };*/
|
|
const struct optdesc opt_iff_up = { "iff-up", "up", OPT_IFF_UP, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_UP };
|
|
const struct optdesc opt_iff_broadcast = { "iff-broadcast", NULL, OPT_IFF_BROADCAST, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_BROADCAST };
|
|
const struct optdesc opt_iff_debug = { "iff-debug" , NULL, OPT_IFF_DEBUG, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_DEBUG };
|
|
const struct optdesc opt_iff_loopback = { "iff-loopback" , "loopback", OPT_IFF_LOOPBACK, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_LOOPBACK };
|
|
const struct optdesc opt_iff_pointopoint = { "iff-pointopoint", "pointopoint",OPT_IFF_POINTOPOINT, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_POINTOPOINT };
|
|
const struct optdesc opt_iff_notrailers = { "iff-notrailers", "notrailers", OPT_IFF_NOTRAILERS, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_NOTRAILERS };
|
|
const struct optdesc opt_iff_running = { "iff-running", "running", OPT_IFF_RUNNING, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_RUNNING };
|
|
const struct optdesc opt_iff_noarp = { "iff-noarp", "noarp", OPT_IFF_NOARP, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_NOARP };
|
|
const struct optdesc opt_iff_promisc = { "iff-promisc", "promisc", OPT_IFF_PROMISC, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_PROMISC };
|
|
const struct optdesc opt_iff_allmulti = { "iff-allmulti", "allmulti", OPT_IFF_ALLMULTI, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_ALLMULTI };
|
|
const struct optdesc opt_iff_master = { "iff-master", "master", OPT_IFF_MASTER, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_MASTER };
|
|
const struct optdesc opt_iff_slave = { "iff-slave", "slave", OPT_IFF_SLAVE, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_SLAVE };
|
|
const struct optdesc opt_iff_multicast = { "iff-multicast", NULL, OPT_IFF_MULTICAST, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_MULTICAST };
|
|
const struct optdesc opt_iff_portsel = { "iff-portsel", "portsel", OPT_IFF_PORTSEL, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_PORTSEL };
|
|
const struct optdesc opt_iff_automedia = { "iff-automedia", "automedia", OPT_IFF_AUTOMEDIA, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_AUTOMEDIA };
|
|
/*const struct optdesc opt_iff_dynamic = { "iff-dynamic", "dynamic", OPT_IFF_DYNAMIC, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), sizeof(short), IFF_DYNAMIC };*/
|
|
#if LATER
|
|
const struct optdesc opt_route = { "route", NULL, OPT_ROUTE, GROUP_INTERFACE, PH_INIT, TYPE_STRING, OFUNC_SPEC };
|
|
#endif
|
|
|
|
static const struct xioaddr_endpoint_desc xioendpoint_tun1 = { XIOADDR_SYS, "tun", 1, XIOBIT_ALL, GROUP_FD|GROUP_CHR|GROUP_NAMED|GROUP_OPEN|GROUP_TUN, XIOSHUT_CLOSE, XIOCLOSE_NONE, xioopen_tun, 0, 0, 0 HELP(":<ip-addr>/<bits>") };
|
|
|
|
const union xioaddr_desc *xioaddrs_tun[] = {
|
|
(union xioaddr_desc *)&xioendpoint_tun1,
|
|
NULL
|
|
};
|
|
|
|
// "if-name"=tun3
|
|
// "route"=address/netmask
|
|
// "ip6-route"=address/netmask
|
|
// "iff-broadcast"
|
|
// "iff-debug"
|
|
// "iff-promisc"
|
|
// see .../linux/if.h
|
|
|
|
|
|
#if LATER
|
|
/* sub options for route option */
|
|
#define IFOPT_ROUTE 1
|
|
static const struct optdesc opt_route_tos = { "route", NULL, IFOPT_ROUTE, };
|
|
static const struct optname xio_route_options[] = {
|
|
{"tos", &xio_route_tos }
|
|
} ;
|
|
#endif
|
|
|
|
static int xioopen_tun(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xfd, unsigned groups, int dummy1, int dummy2, int dummy3) {
|
|
char *tundevice = NULL;
|
|
char *tunname = NULL, *tuntype = NULL;
|
|
int pf = /*! PF_UNSPEC*/ PF_INET;
|
|
union xiorange_union network;
|
|
bool no_pi = false;
|
|
const char *namedargv[] = { "tun", NULL, NULL };
|
|
int rw = (xioflags & XIO_ACCMODE);
|
|
bool exists;
|
|
struct ifreq ifr;
|
|
int sockfd;
|
|
char *ifaddr;
|
|
int result;
|
|
|
|
if (argc != 2) {
|
|
Error2("%s: wrong number of parameters (%d instead of 1)",
|
|
argv[0], argc-1);
|
|
}
|
|
|
|
if (retropt_string(opts, OPT_TUN_DEVICE, &tundevice) != 0) {
|
|
tundevice = strdup("/dev/net/tun");
|
|
}
|
|
|
|
/*! socket option here? */
|
|
retropt_socket_pf(opts, &pf);
|
|
|
|
namedargv[1] = tundevice;
|
|
/* open the tun cloning device */
|
|
if ((result = _xioopen_named_early(2, namedargv, xfd, groups, &exists, opts)) < 0) {
|
|
return result;
|
|
}
|
|
|
|
/*========================= the tunnel interface =========================*/
|
|
Notice("creating tunnel network interface");
|
|
if ((result = _xioopen_open(tundevice, rw, opts)) < 0)
|
|
return result;
|
|
xfd->stream.fd1 = result;
|
|
|
|
/* prepare configuration of the new network interface */
|
|
memset(&ifr, 0,sizeof(ifr));
|
|
|
|
if (retropt_string(opts, OPT_TUN_NAME, &tunname) == 0) {
|
|
strncpy(ifr.ifr_name, tunname, IFNAMSIZ);
|
|
free(tunname);
|
|
} else {
|
|
ifr.ifr_name[0] = '\0';
|
|
}
|
|
|
|
ifr.ifr_flags = IFF_TUN;
|
|
if (retropt_string(opts, OPT_TUN_TYPE, &tuntype) == 0) {
|
|
if (!strcmp(tuntype, "tap")) {
|
|
ifr.ifr_flags = IFF_TAP;
|
|
} else if (strcmp(tuntype, "tun")) {
|
|
Error1("unknown tun-type \"%s\"", tuntype);
|
|
}
|
|
}
|
|
|
|
if (retropt_bool(opts, OPT_IFF_NO_PI, &no_pi) == 0) {
|
|
if (no_pi) {
|
|
ifr.ifr_flags |= IFF_NO_PI;
|
|
#if 0 /* not neccessary for now */
|
|
} else {
|
|
ifr.ifr_flags &= ~IFF_NO_PI;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if (Ioctl(xfd->stream.fd1, TUNSETIFF, &ifr) < 0) {
|
|
Error3("ioctl(%d, TUNSETIFF, {\"%s\"}: %s",
|
|
xfd->stream.fd1, ifr.ifr_name, strerror(errno));
|
|
Close(xfd->stream.fd1);
|
|
}
|
|
|
|
/*===================== setting interface properties =====================*/
|
|
|
|
/* we seem to need a socket for manipulating the interface */
|
|
if ((sockfd = Socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
|
|
Error1("socket(PF_INET, SOCK_DGRAM, 0): %s", strerror(errno));
|
|
sockfd = xfd->stream.fd1; /* desparate fallback attempt */
|
|
}
|
|
|
|
/*--------------------- setting interface address and netmask ------------*/
|
|
if ((ifaddr = strdup(argv[1])) == NULL) {
|
|
Error1("strdup(\"%s\"): out of memory", argv[1]);
|
|
return STAT_RETRYLATER;
|
|
}
|
|
if ((result = xioparsenetwork(ifaddr, pf, &network)) != STAT_OK) {
|
|
/*! recover */
|
|
return result;
|
|
}
|
|
socket_init(pf, (union sockaddr_union *)&ifr.ifr_addr);
|
|
((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr = network.ip4.netaddr;
|
|
if (Ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
|
|
Error4("ioctl(%d, SIOCSIFADDR, {\"%s\", \"%s\"}: %s",
|
|
sockfd, ifr.ifr_name, ifaddr, strerror(errno));
|
|
}
|
|
((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr = network.ip4.netmask;
|
|
if (Ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
|
|
Error4("ioctl(%d, SIOCSIFNETMASK, {\"0x%08u\", \"%s\"}, %s",
|
|
sockfd, ((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr,
|
|
ifaddr, strerror(errno));
|
|
}
|
|
free(ifaddr);
|
|
|
|
/*--------------------- setting interface flags --------------------------*/
|
|
applyopts_single(&xfd->stream, opts, PH_FD);
|
|
|
|
if (Ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
|
|
Error3("ioctl(%d, SIOCGIFFLAGS, {\"%s\"}: %s",
|
|
sockfd, ifr.ifr_name, strerror(errno));
|
|
}
|
|
Debug2("\"%s\": system set flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
|
|
ifr.ifr_flags |= xfd->stream.para.tun.iff_opts[0];
|
|
ifr.ifr_flags &= ~xfd->stream.para.tun.iff_opts[1];
|
|
Debug2("\"%s\": xio merged flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
|
|
if (Ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
|
|
Error4("ioctl(%d, SIOCSIFFLAGS, {\"%s\", %hd}: %s",
|
|
sockfd, ifr.ifr_name, ifr.ifr_flags, strerror(errno));
|
|
}
|
|
ifr.ifr_flags = 0;
|
|
if (Ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
|
|
Error3("ioctl(%d, SIOCGIFFLAGS, {\"%s\"}: %s",
|
|
sockfd, ifr.ifr_name, strerror(errno));
|
|
}
|
|
Debug2("\"%s\": resulting flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
|
|
|
|
|
|
#if LATER
|
|
applyopts_named(tundevice, opts, PH_FD);
|
|
#endif
|
|
applyopts(xfd->stream.fd1, opts, PH_FD);
|
|
applyopts_cloexec(xfd->stream.fd1, opts);
|
|
|
|
applyopts_fchown(xfd->stream.fd1, opts);
|
|
|
|
if ((result = _xio_openlate(&xfd->stream, opts)) < 0)
|
|
return result;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* WITH_TUN */
|