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https://github.com/moparisthebest/socat
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106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/* source: xio-interface.c */
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/* Copyright Gerhard Rieger 2010 */
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/* Published under the GNU General Public License V.2, see file COPYING */
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/* this file contains the source for opening addresses of raw socket type */
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#include "xiosysincludes.h"
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#if WITH_INTERFACE
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#include "xioopen.h"
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#include "xio-socket.h"
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#include "xio-interface.h"
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static
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int xioopen_interface(int argc, const char *argv[], struct opt *opts,
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int xioflags, xiofile_t *xfd, unsigned groups, int pf,
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int dummy2, int dummy3);
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const struct addrdesc xioaddr_interface= { "interface", 3, xioopen_interface, GROUP_FD|GROUP_SOCKET, PF_PACKET, 0, 0 HELP(":<interface>") };
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static
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int _xioopen_interface(const char *ifname,
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struct opt *opts, int xioflags, xiofile_t *xxfd,
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unsigned groups, int pf) {
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xiosingle_t *xfd = &xxfd->stream;
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union sockaddr_union us = {{0}};
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socklen_t uslen;
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int socktype = SOCK_RAW;
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unsigned int ifidx;
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bool needbind = false;
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char *bindstring = NULL;
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struct sockaddr_ll sall = { 0 };
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if (ifindex(ifname, &ifidx, -1) < 0) {
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Error1("unknown interface \"%s\"", ifname);
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ifidx = 0; /* desparate attempt to continue */
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}
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xfd->howtoend = END_SHUTDOWN;
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retropt_int(opts, OPT_SO_TYPE, &socktype);
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retropt_socket_pf(opts, &pf);
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/* ...res_opts[] */
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if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
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applyopts(-1, opts, PH_INIT);
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xfd->salen = sizeof(xfd->peersa);
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if (pf == PF_UNSPEC) {
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pf = xfd->peersa.soa.sa_family;
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}
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xfd->dtype = XIODATA_RECVFROM_SKIPIP;
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if (retropt_string(opts, OPT_BIND, &bindstring)) {
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needbind = true;
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}
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/*!!! parse by ':' */
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us.ll.sll_family = pf;
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us.ll.sll_protocol = htons(ETH_P_ALL);
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us.ll.sll_ifindex = ifidx;
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uslen = sizeof(sall);
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needbind = true;
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xfd->peersa = (union sockaddr_union)us;
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return
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_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
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opts, xioflags, xfd, groups, pf, socktype, 0);
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}
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static
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int xioopen_interface(int argc, const char *argv[], struct opt *opts,
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int xioflags, xiofile_t *xxfd, unsigned groups,
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int pf, int dummy2, int dummy3) {
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xiosingle_t *xfd = &xxfd->stream;
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int result;
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if (argc != 2) {
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Error2("%s: wrong number of parameters (%d instead of 1)",
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argv[0], argc-1);
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return STAT_NORETRY;
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}
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if ((result =
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_xioopen_interface(argv[1], opts, xioflags, xxfd, groups, pf))
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!= STAT_OK) {
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return result;
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}
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xfd->dtype = XIOREAD_RECV|XIOWRITE_SENDTO;
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if (pf == PF_INET) {
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xfd->dtype |= XIOREAD_RECV_SKIPIP;
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}
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xfd->para.socket.la.soa.sa_family = xfd->peersa.soa.sa_family;
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_xio_openlate(xfd, opts);
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return STAT_OK;
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}
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#endif /* WITH_INTERFACE */
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