sys-ecos.c

eCos操作系统源码

	    ret = 0;
	}
    }
    return ret;
}
#endif

//==========================================================================
/*
 * sifvjcomp - config tcp header compression
 */
int
sifvjcomp(u, vjcomp, cidcomp, maxcid)
    int u, vjcomp, cidcomp, maxcid;
{
    u_int x;
    int err;
    
    if ((err = cyg_ppp_ppptioctl(&ppp_tty, PPPIOCGFLAGS, (caddr_t) &x, 0)) != 0) {
	syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %d",err);
	return 0;
    }
    x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
    x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
    if ((err = cyg_ppp_ppptioctl(&ppp_tty, PPPIOCSFLAGS, (caddr_t) &x, 0)) != 0) {
	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %d",err);
	return 0;
    }
    if (vjcomp && ((err=cyg_ppp_ppptioctl(&ppp_tty, PPPIOCSMAXCID, (caddr_t) &maxcid, 0)) != 0)) {
	syslog(LOG_ERR, "ioctl(PPPIOCSMAXCID): %d",err);
	return 0;
    }
    return 1;
}

//==========================================================================
/*
 * sifup - Config the interface up and enable IP packets to pass.
 */
int
sifup(u)
    int u;
{
    struct ifreq ifr;

//db_printf("%s called\n", __PRETTY_FUNCTION__);
    strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
    if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
	syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
	return 0;
    }
    ifr.ifr_flags |= IFF_UP;
    if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
	syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
	return 0;
    }
    if_is_up = 1;
    return 1;
}

//==========================================================================
/*
 * sifnpmode - Set the mode for handling packets for a given NP.
 */
int
sifnpmode(u, proto, mode)
    int u;
    int proto;
    enum NPmode mode;
{
    struct npioctl npi;

//db_printf("%s called\n", __PRETTY_FUNCTION__);
    npi.protocol = proto;
    npi.mode = mode;
    {
        int err;
    
        if ((err = cyg_ppp_ppptioctl(&ppp_tty, PPPIOCSNPMODE, (caddr_t)&npi, 0)) < 0) {
            syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %d", proto, mode,err);
            return 0;
        }
    }
    
    return 1;
}

//==========================================================================
/*
 * sifdown - Config the interface down and disable IP.
 */
int
sifdown(u)
    int u;
{
    struct ifreq ifr;
    int rv;
    struct npioctl npi;

db_printf("%s called\n", __PRETTY_FUNCTION__);
    rv = 1;
    npi.protocol = PPP_IP;
    npi.mode = NPMODE_ERROR;
    {
        int err = cyg_ppp_ppptioctl(&ppp_tty, PPPIOCSNPMODE, (caddr_t) &npi, 0);
        if( err < 0 )
            syslog(LOG_WARNING, "ioctl(PPPIOCSNPMODE): %d",err);
    }
    strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
    if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
	syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
	rv = 0;
    } else {
	ifr.ifr_flags &= ~IFF_UP;
	if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
	    syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
	    rv = 0;
	} else
	    if_is_up = 0;
    }
    return rv;
    return 0;
}

//==========================================================================
/*
 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
 * if it exists.
 */
#define SET_SA_FAMILY(addr, family)		\
    BZERO((char *) &(addr), sizeof(addr));	\
    addr.sa_family = (family); 			\
    addr.sa_len = sizeof(addr);

//==========================================================================
/*
 * sifaddr - Config the interface IP addresses and netmask.
 */
int
sifaddr(u, o, h, m)
    int u;
    u_int32_t o, h, m;
{
    struct ifaliasreq ifra;
    struct ifreq ifr;

//db_printf("%s called\n", __PRETTY_FUNCTION__);
    strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
    SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
    ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
    SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
    ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
    if (m != 0) {
	SET_SA_FAMILY(ifra.ifra_mask, AF_INET);
	((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m;
    } else
	BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
    BZERO(&ifr, sizeof(ifr));
    strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
    if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) {
	if (errno != EADDRNOTAVAIL)
	    syslog(LOG_WARNING, "Couldn't remove interface address: %d",errno);
    }
    if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
	if (errno != EEXIST) {
	    syslog(LOG_ERR, "Couldn't set interface address: %d",errno);
	    return 0;
	}
	syslog(LOG_WARNING,
	       "Couldn't set interface address: Address %s already exists",
		ip_ntoa(o));
    }
    ifaddrs[0] = o;
    ifaddrs[1] = h;
    return 1;
}

//==========================================================================
/*
 * cifaddr - Clear the interface IP addresses, and delete routes
 * through the interface if possible.
 */
int
cifaddr(u, o, h)
    int u;
    u_int32_t o, h;
{
    struct ifaliasreq ifra;

db_printf("%s called\n", __PRETTY_FUNCTION__);
    ifaddrs[0] = 0;
    strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
    SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
    ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
    SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
    ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
    BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
    if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) {
	if (errno != EADDRNOTAVAIL)
	    syslog(LOG_WARNING, "Couldn't delete interface address: %m");
	return 0;
    }
    return 1;
}

//==========================================================================
/*
 * sifdefaultroute - assign a default route through the address given.
 */
int
sifdefaultroute(u, l, g)
    int u;
    u_int32_t l, g;
{
db_printf("%s called\n", __PRETTY_FUNCTION__);
    return dodefaultroute(g, 's');
}

//==========================================================================
/*
 * cifdefaultroute - delete a default route through the address given.
 */
int
cifdefaultroute(u, l, g)
    int u;
    u_int32_t l, g;
{
db_printf("%s called\n", __PRETTY_FUNCTION__);
    return dodefaultroute(g, 'c');
}

//==========================================================================
/*
 * dodefaultroute - talk to a routing socket to add/delete a default route.
 */
static int
dodefaultroute(g, cmd)
    u_int32_t g;
    int cmd;
{
    int routes;
    struct {
	struct rt_msghdr	hdr;
	struct sockaddr_in	dst;
	struct sockaddr_in	gway;
	struct sockaddr_in	mask;
    } rtmsg;

db_printf("%s %08x %c\n", __PRETTY_FUNCTION__,g,cmd);
    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
	syslog(LOG_ERR, "Couldn't %s default route: socket: %d",
	       cmd=='s'? "add": "delete",errno);
	return 0;
    }

    memset(&rtmsg, 0, sizeof(rtmsg));
    rtmsg.hdr.rtm_type = cmd == 's'? RTM_ADD: RTM_DELETE;
    rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
    rtmsg.hdr.rtm_version = RTM_VERSION;
    rtmsg.hdr.rtm_seq = ++rtm_seq;
    rtmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
    rtmsg.dst.sin_len = sizeof(rtmsg.dst);
    rtmsg.dst.sin_family = AF_INET;
    rtmsg.gway.sin_len = sizeof(rtmsg.gway);
    rtmsg.gway.sin_family = AF_INET;
    rtmsg.gway.sin_addr.s_addr = g;
    rtmsg.mask.sin_len = sizeof(rtmsg.dst);
    rtmsg.mask.sin_family = AF_INET;

    rtmsg.hdr.rtm_msglen = sizeof(rtmsg);
    if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) {
	syslog(LOG_ERR, "Couldn't %s default route: %d",
	       cmd=='s'? "add": "delete",errno);
	close(routes);
	return 0;
    }

    close(routes);
    default_route_gateway = (cmd == 's')? g: 0;
    return 1;
}

//==========================================================================

#if RTM_VERSION >= 3

/*
 * sifproxyarp - Make a proxy ARP entry for the peer.
 */
static struct {
    struct rt_msghdr		hdr;
    struct sockaddr_inarp	dst;
    struct sockaddr_dl		hwa;
    char			extra[128];
} arpmsg;

static int arpmsg_valid;

int
sifproxyarp(unit, hisaddr)
    int unit;
    u_int32_t hisaddr;
{
    int routes;

db_printf("%s called\n", __PRETTY_FUNCTION__);
    /*
     * Get the hardware address of an interface on the same subnet
     * as our local address.
     */
    memset(&arpmsg, 0, sizeof(arpmsg));
    if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
	syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
	return 0;
    }

    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
	syslog(LOG_ERR, "Couldn't add proxy arp entry: socket: %m");
	return 0;
    }

    arpmsg.hdr.rtm_type = RTM_ADD;
    arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
    arpmsg.hdr.rtm_version = RTM_VERSION;
    arpmsg.hdr.rtm_seq = ++rtm_seq;
    arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
    arpmsg.hdr.rtm_inits = RTV_EXPIRE;
    arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
    arpmsg.dst.sin_family = AF_INET;
    arpmsg.dst.sin_addr.s_addr = hisaddr;
    arpmsg.dst.sin_other = SIN_PROXY;

    arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
	+ arpmsg.hwa.sdl_len;
    if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
	syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
	close(routes);
	return 0;
    }

    close(routes);
    arpmsg_valid = 1;
    proxy_arp_addr = hisaddr;
    return 1;
}

/*
 * cifproxyarp - Delete the proxy ARP entry for the peer.
 */
int
cifproxyarp(unit, hisaddr)
    int unit;
    u_int32_t hisaddr;
{
    int routes;

db_printf("%s called\n", __PRETTY_FUNCTION__);
    if (!arpmsg_valid)
	return 0;
    arpmsg_valid = 0;

    arpmsg.hdr.rtm_type = RTM_DELETE;
    arpmsg.hdr.rtm_seq = ++rtm_seq;

    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
	syslog(LOG_ERR, "Couldn't delete proxy arp entry: socket: %m");
	return 0;
    }

    if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
	syslog(LOG_ERR, "Couldn't delete proxy arp entry: %m");
	close(routes);
	return 0;
    }

    close(routes);
    proxy_arp_addr = 0;
    return 1;
}

//==========================================================================

#else	/* RTM_VERSION */

/*
 * sifproxyarp - Make a proxy ARP entry for the peer.
 */
int
sifproxyarp(unit, hisaddr)
    int unit;
    u_int32_t hisaddr;
{
    struct arpreq arpreq;
    struct {
	struct sockaddr_dl	sdl;
	char			space[128];
    } dls;

db_printf("%s called\n", __PRETTY_FUNCTION__);
    BZERO(&arpreq, sizeof(arpreq));

    /*
     * Get the hardware address of an interface on the same subnet
     * as our local address.
     */
    if (!get_ether_addr(hisaddr, &dls.sdl)) {
	syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
	return 0;
    }

    arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
    arpreq.arp_ha.sa_family = AF_UNSPEC;
    BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
    SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
    ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
    arpreq.arp_flags = ATF_PERM | ATF_PUBL;
    if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
	syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
	return 0;
    }

    proxy_arp_addr = hisaddr;
    return 1;
}

/*
 * cifproxyarp - Delete the proxy ARP entry for the peer.
 */
int
cifproxyarp(unit, hisaddr)
    int unit;
    u_int32_t hisaddr;
{
    struct arpreq arpreq;

db_printf("%s called\n", __PRETTY_FUNCTION__);
    BZERO(&arpreq, sizeof(arpreq));
    SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
    ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
    if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
	syslog(LOG_WARNING, "Couldn't delete proxy arp entry: %m");
	return 0;
    }
    proxy_arp_addr = 0;
    return 1;
}
#endif	/* RTM_VERSION */


//==========================================================================
/*
 * get_ether_addr - get the hardware address of an interface on the
 * the same subnet as ipaddr.
 */
#define MAX_IFS		32

static int
get_ether_addr(ipaddr, hwaddr)
    u_int32_t ipaddr;
    struct sockaddr_dl *hwaddr;
{
    struct ifreq *ifr, *ifend, *ifp;
    u_int32_t ina, mask;
    struct sockaddr_dl *dla;
    struct ifreq ifreq;
    struct ifconf ifc;
    struct ifreq ifs[MAX_IFS];

db_printf("%s called\n", __PRETTY_FUNCTION__);
    ifc.ifc_len = sizeof(ifs);
    ifc.ifc_req = ifs;
    if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
	syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
	return 0;
    }

    /*
     * Scan through looking for an interface with an Internet
     * address on the same subnet as `ipaddr'.
     */
    ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);