diff options
Diffstat (limited to 'bsps/powerpc/mpc8260ads/net/if_hdlcsubr.c')
| -rw-r--r-- | bsps/powerpc/mpc8260ads/net/if_hdlcsubr.c | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/bsps/powerpc/mpc8260ads/net/if_hdlcsubr.c b/bsps/powerpc/mpc8260ads/net/if_hdlcsubr.c new file mode 100644 index 0000000000..350efdbc22 --- /dev/null +++ b/bsps/powerpc/mpc8260ads/net/if_hdlcsubr.c @@ -0,0 +1,350 @@ +/* + * Created from if_ethersubr.c by Andy Dachs <a.dachs@sstl.co.uk> + * Surrey Satellite Technology Limited (SSTL), 2001 + * Modified (hacked) to support IP frames transmitted over HDLC. This + * all needs tidying up in future but it does actually work for point + * to point communications. I have an SDL WANic400 synchronous + * communications card that comes with Windows NT drivers. The drivers + * support a mode that they call "Ethernet Emulation". That simply + * puts the IP frame in an HDLC frame without any ethernet header. i.e. + * <HDLC Flag><IpFrame><CRC><HDLC Flag>. There is no addressing beyond + * the IP header information so is only suitable for point to point links + * with a single protocol. "At some point" I will add a Frame Relay header + * but at the moment I have difficulties getting the WANic card driver's + * Frame Relay driver to work. + * + * Copyright (c) 1982, 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 + */ + +#define __INSIDE_RTEMS_BSD_TCPIP_STACK__ + +#include <rtems/rtems_bsdnet.h> + +#include <sys/param.h> +/*#include <sys/systm.h> +#include <sys/kernel.h> */ +#define KERNEL +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/sockio.h> +#include <errno.h> +#include <sys/syslog.h> +#include <sys/sysctl.h> + +#include <net/if.h> +#include <net/netisr.h> +#include <net/route.h> +#include <net/if_llc.h> +#include <net/if_dl.h> +#include <net/if_types.h> +#include <net/ethernet.h> + +#include <netinet/in.h> +#include <netinet/in_var.h> +#include <netinet/if_ether.h> + +#include <stdio.h> + +#include "if_hdlcsubr.h" + +/* +u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; +*/ +#define senderr(e) { error = (e); goto bad;} + +/* + * HDLC output routine. + * Just transmit the packet (hardware adds flags and CRC) + */ +int +hdlc_output(ifp, m0, dst, rt0) + register struct ifnet *ifp; + struct mbuf *m0; + struct sockaddr *dst; + struct rtentry *rt0; +{ + short type; + int s, error = 0; +#if 0 + u_char edst[6]; +#endif + register struct mbuf *m = m0; + register struct rtentry *rt; + struct mbuf *mcopy = (struct mbuf *)0; +/* register struct ether_header *eh; */ + int off, len = m->m_pkthdr.len; + +/* printk( "hdlc output" ); */ +/* struct arpcom *ac = (struct arpcom *)ifp; */ + + if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) + senderr(ENETDOWN); + rt = rt0; + if (rt) { + if ((rt->rt_flags & RTF_UP) == 0) { + rt0 = rt = rtalloc1(dst, 1, 0UL); + if (rt0) + rt->rt_refcnt--; + else + senderr(EHOSTUNREACH); + } + if (rt->rt_flags & RTF_GATEWAY) { + if (rt->rt_gwroute == 0) + goto lookup; + if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { + rtfree(rt); rt = rt0; + lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1, + 0UL); + if ((rt = rt->rt_gwroute) == 0) + senderr(EHOSTUNREACH); + } + } + if (rt->rt_flags & RTF_REJECT) + if (rt->rt_rmx.rmx_expire == 0 || + rtems_bsdnet_seconds_since_boot() < rt->rt_rmx.rmx_expire) + senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); + } + switch (dst->sa_family) { + + case AF_INET: +#if 0 + if (!arpresolve(ac, rt, m, dst, edst, rt0)) + return (0); /* if not yet resolved */ +#endif + + /* If broadcasting on a simplex interface, loopback a copy */ + if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) + mcopy = m_copy(m, 0, (int)M_COPYALL); + off = m->m_pkthdr.len - m->m_len; + type = htons(ETHERTYPE_IP); + break; +#if 0 + case AF_UNSPEC: + eh = (struct ether_header *)dst->sa_data; + (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); + type = eh->ether_type; + break; +#endif + default: + printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit, + dst->sa_family); + senderr(EAFNOSUPPORT); + } + + if (mcopy) + (void) looutput(ifp, mcopy, dst, rt); +#if 0 + /* + * Add local net header. If no space in first mbuf, + * allocate another. + */ + M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); +#endif + + if (m == 0) + senderr(ENOBUFS); + +#if 0 + eh = mtod(m, struct ether_header *); + (void)memcpy(&eh->ether_type, &type, + sizeof(eh->ether_type)); + (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); + (void)memcpy(eh->ether_shost, ac->ac_enaddr, + sizeof(eh->ether_shost)); +#endif + + s = splimp(); + /* + * Queue message on interface, and start output if interface + * not yet active. + */ + if (IF_QFULL(&ifp->if_snd)) { + IF_DROP(&ifp->if_snd); + splx(s); + senderr(ENOBUFS); + } + IF_ENQUEUE(&ifp->if_snd, m); + if ((ifp->if_flags & IFF_OACTIVE) == 0) + (*ifp->if_start)(ifp); + splx(s); + + ifp->if_obytes += len /*+ sizeof (struct ether_header)*/; + if (m->m_flags & M_MCAST) + ifp->if_omcasts++; + return (error); + +bad: + if (m) + m_freem(m); + return (error); +} + +/* + * Process a received Ethernet packet; + * the packet is in the mbuf chain m without + * the ether header, which is provided separately. + */ +void +hdlc_input(ifp, m) + struct ifnet *ifp; + struct mbuf *m; +{ + register struct ifqueue *inq; + int s; + + struct ether_header eh; + + if ((ifp->if_flags & IFF_UP) == 0) { + m_freem(m); + return; + } + ifp->if_ibytes += m->m_pkthdr.len; +/* + if (memcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost, + sizeof(etherbroadcastaddr)) == 0) + m->m_flags |= M_BCAST; + else if (eh->ether_dhost[0] & 1) + m->m_flags |= M_MCAST; +*/ + if (m->m_flags & (M_BCAST|M_MCAST)) + ifp->if_imcasts++; + + /* + * RTEMS addition -- allow application to `tap into' + * the incoming packet stream. + */ + if (ifp->if_tap && (*ifp->if_tap)(ifp, &eh, m)) { + m_freem(m); + return; + } + + schednetisr(NETISR_IP); + inq = &ipintrq; + + s = splimp(); + if (IF_QFULL(inq)) { + IF_DROP(inq); + m_freem(m); + } else + IF_ENQUEUE(inq, m); + splx(s); +} + +/* + * Perform common duties while attaching to interface list + */ +void +hdlc_ifattach(ifp) + register struct ifnet *ifp; +{ + register struct ifaddr *ifa; + register struct sockaddr_dl *sdl; + + ifp->if_type = IFT_ETHER; + ifp->if_addrlen = 0; + ifp->if_hdrlen = 0; + ifp->if_mtu = 2048; + if (ifp->if_baudrate == 0) + ifp->if_baudrate = 8000000; + for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) + if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) && + sdl->sdl_family == AF_LINK) { + sdl->sdl_type = IFT_ETHER; + sdl->sdl_alen = ifp->if_addrlen; +/* + memcpy(LLADDR(sdl), + (caddr_t)((struct arpcom *)ifp)->ac_enaddr, + ifp->if_addrlen); +*/ + break; + } +} + +/* SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); */ + +int +hdlc_ioctl(struct ifnet *ifp, int command, caddr_t data) +{ + struct ifaddr *ifa = (struct ifaddr *) data; + struct ifreq *ifr = (struct ifreq *) data; + int error = 0; + + switch (command) { + case SIOCSIFADDR: + ifp->if_flags |= IFF_UP; + + switch (ifa->ifa_addr->sa_family) { +#if 0 +#ifdef INET + case AF_INET: + ifp->if_init(ifp->if_softc); /* before arpwhohas */ + + arp_ifinit((struct arpcom *)ifp, ifa); + break; +#endif +#endif + default: + ifp->if_init(ifp->if_softc); + break; + } + break; + + case SIOCGIFADDR: + { + struct sockaddr *sa; + + sa = (struct sockaddr *) & ifr->ifr_data; +/* + memcpy((caddr_t) sa->sa_data, + ((struct arpcom *)ifp->if_softc)->ac_enaddr, + ETHER_ADDR_LEN); +*/ + } + break; + + case SIOCSIFMTU: + /* + * Set the interface MTU. + */ + if (ifr->ifr_mtu > ETHERMTU) { + error = EINVAL; + } else { + ifp->if_mtu = ifr->ifr_mtu; + } + break; + } + return (error); +} |