interface.c

ifconfig源码

    return -1;
}
#endif /* KEEP_UNUSED */

static struct hwtype ppp_hwtype =
{
    "ppp", "Point-Point Protocol", ARPHRD_PPP, 0,
    NULL, NULL, NULL /* UNUSED do_ppp */, 0
};


#endif				/* HAVE_PPP */

static struct hwtype *hwtypes[] =
{

    &loop_hwtype,

#if HAVE_HWSLIP
    &slip_hwtype,
    &cslip_hwtype,
    &slip6_hwtype,
    &cslip6_hwtype,
    &adaptive_hwtype,
#endif
#if HAVE_HWSTRIP
    &strip_hwtype,
#endif
#if HAVE_HWASH
    &ash_hwtype,
#endif
#if HAVE_HWETHER
    &ether_hwtype,
#endif
#if HAVE_HWTR
    &tr_hwtype,
#ifdef ARPHRD_IEEE802_TR
    &tr_hwtype1, 
#endif
#endif
#if HAVE_HWAX25
    &ax25_hwtype,
#endif
#if HAVE_HWNETROM
    &netrom_hwtype,
#endif
#if HAVE_HWROSE
    &rose_hwtype,
#endif
#if HAVE_HWTUNNEL
    &tunnel_hwtype,
#endif
#if HAVE_HWPPP
    &ppp_hwtype,
#endif
#if HAVE_HWHDLCLAPB
    &hdlc_hwtype,
    &lapb_hwtype,
#endif
#if HAVE_HWARC
    &arcnet_hwtype,
#endif
#if HAVE_HWFR
    &dlci_hwtype,
    &frad_hwtype,
#endif
#if HAVE_HWSIT
    &sit_hwtype,
#endif
#if HAVE_HWFDDI
    &fddi_hwtype,
#endif
#if HAVE_HWHIPPI
    &hippi_hwtype,
#endif
#if HAVE_HWIRDA
    &irda_hwtype,
#endif
#if HAVE_HWEC
    &ec_hwtype,
#endif
#if HAVE_HWX25
    &x25_hwtype,
#endif
    &unspec_hwtype,
    NULL
};

#ifdef KEEP_UNUSED
static short sVhwinit = 0;

static void hwinit()
{
    loop_hwtype.title = _("Local Loopback");
    unspec_hwtype.title = _("UNSPEC");
#if HAVE_HWSLIP
    slip_hwtype.title = _("Serial Line IP");
    cslip_hwtype.title = _("VJ Serial Line IP");
    slip6_hwtype.title = _("6-bit Serial Line IP");
    cslip6_hwtype.title = _("VJ 6-bit Serial Line IP");
    adaptive_hwtype.title = _("Adaptive Serial Line IP");
#endif
#if HAVE_HWETHER
    ether_hwtype.title = _("Ethernet");
#endif
#if HAVE_HWASH
    ash_hwtype.title = _("Ash");
#endif
#if HAVE_HWFDDI
    fddi_hwtype.title = _("Fiber Distributed Data Interface");
#endif
#if HAVE_HWHIPPI
    hippi_hwtype.title = _("HIPPI");
#endif
#if HAVE_HWAX25
    ax25_hwtype.title = _("AMPR AX.25");
#endif
#if HAVE_HWROSE
    rose_hwtype.title = _("AMPR ROSE");
#endif
#if HAVE_HWNETROM
    netrom_hwtype.title = _("AMPR NET/ROM");
#endif
#if HAVE_HWX25
    x25_hwtype.title = _("generic X.25");
#endif
#if HAVE_HWTUNNEL
    tunnel_hwtype.title = _("IPIP Tunnel");
#endif
#if HAVE_HWPPP
    ppp_hwtype.title = _("Point-to-Point Protocol");
#endif
#if HAVE_HWHDLCLAPB
    hdlc_hwtype.title = _("(Cisco)-HDLC");
    lapb_hwtype.title = _("LAPB");
#endif
#if HAVE_HWARC
    arcnet_hwtype.title = _("ARCnet");
#endif
#if HAVE_HWFR
    dlci_hwtype.title = _("Frame Relay DLCI");
    frad_hwtype.title = _("Frame Relay Access Device");
#endif
#if HAVE_HWSIT
    sit_hwtype.title = _("IPv6-in-IPv4");
#endif
#if HAVE_HWIRDA
    irda_hwtype.title = _("IrLAP");
#endif
#if HAVE_HWTR
    tr_hwtype.title = _("16/4 Mbps Token Ring");
#ifdef ARPHRD_IEEE802_TR
    tr_hwtype1.title = _("16/4 Mbps Token Ring (New)") ; 
#endif
#endif
#if HAVE_HWEC
    ec_hwtype.title = _("Econet");
#endif
    sVhwinit = 1;
}
#endif /* KEEP_UNUSED */

#ifdef IFF_PORTSEL
static const char *if_port_text[][4] =
{
    /* Keep in step with <linux/netdevice.h> */
    {"unknown", NULL, NULL, NULL},
    {"10base2", "bnc", "coax", NULL},
    {"10baseT", "utp", "tpe", NULL},
    {"AUI", "thick", "db15", NULL},
    {"100baseT", NULL, NULL, NULL},
    {"100baseTX", NULL, NULL, NULL},
    {"100baseFX", NULL, NULL, NULL},
    {NULL, NULL, NULL, NULL},
};
#endif

/* Check our hardware type table for this type. */
static struct hwtype *get_hwntype(int type)
{
    struct hwtype **hwp;

#ifdef KEEP_UNUSED
    if (!sVhwinit)
	hwinit();
#endif /* KEEP_UNUSED */

    hwp = hwtypes;
    while (*hwp != NULL) {
	if ((*hwp)->type == type)
	    return (*hwp);
	hwp++;
    }
    return (NULL);
}

/* return 1 if address is all zeros */
static int hw_null_address(struct hwtype *hw, void *ap)
{
    unsigned int i;
    unsigned char *address = (unsigned char *)ap;
    for (i = 0; i < hw->alen; i++)
	if (address[i])
	    return 0;
    return 1;
}

static const char TRext[] = "\0\0k\0M";

static void print_bytes_scaled(unsigned long long ull, const char *end)
{
	unsigned long long int_part;
	unsigned long frac_part;
	const char *ext;
	int i;

	frac_part = 0;
	ext = TRext;
	int_part = ull;
	for (i=0 ; i<2 ; i++) {
		if (int_part >= 1024) {
			frac_part = ((int_part % 1024) * 10) / 1024;
			int_part /= 1024;
			ext += 2;			/* Kb, Mb */
		}
	}

	printf("X bytes:%Lu (%Lu.%lu %sb)%s", ull, int_part, frac_part, ext, end);
}

static void ife_print(struct interface *ptr)
{
    struct aftype *ap;
    struct hwtype *hw;
    int hf;
    int can_compress = 0;

#if HAVE_AFIPX
    static struct aftype *ipxtype = NULL;
#endif
#if HAVE_AFECONET
    static struct aftype *ectype = NULL;
#endif
#if HAVE_AFATALK
    static struct aftype *ddptype = NULL;
#endif
#if HAVE_AFINET6
    FILE *f;
    char addr6[40], devname[20];
    struct sockaddr_in6 sap;
    int plen, scope, dad_status, if_idx;
    extern struct aftype inet6_aftype;
    char addr6p[8][5];
#endif

    ap = get_afntype(ptr->addr.sa_family);
    if (ap == NULL)
	ap = get_afntype(0);

    hf = ptr->type;

    if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
	can_compress = 1;

    hw = get_hwntype(hf);
    if (hw == NULL)
	hw = get_hwntype(-1);

    printf(_("%-9.9s Link encap:%s  "), ptr->name, _(hw->title));
    /* For some hardware types (eg Ash, ATM) we don't print the 
       hardware address if it's null.  */
    if (hw->print != NULL && (! (hw_null_address(hw, ptr->hwaddr) &&
				  hw->suppress_null_addr)))
	printf(_("HWaddr %s  "), hw->print(ptr->hwaddr));
#ifdef IFF_PORTSEL
    if (ptr->flags & IFF_PORTSEL) {
	printf(_("Media:%s"), if_port_text[ptr->map.port][0]);
	if (ptr->flags & IFF_AUTOMEDIA)
	    printf(_("(auto)"));
    }
#endif
    printf("\n");

#if HAVE_AFINET
    if (ptr->has_ip) {
	printf(_("          %s addr:%s "), ap->name,
	       ap->sprint(&ptr->addr, 1));
	if (ptr->flags & IFF_POINTOPOINT) {
	    printf(_(" P-t-P:%s "), ap->sprint(&ptr->dstaddr, 1));
	}
	if (ptr->flags & IFF_BROADCAST) {
	    printf(_(" Bcast:%s "), ap->sprint(&ptr->broadaddr, 1));
	}
	printf(_(" Mask:%s\n"), ap->sprint(&ptr->netmask, 1));
    }
#endif

#if HAVE_AFINET6

    if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
	while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x %02x %02x %02x %20s\n",
		      addr6p[0], addr6p[1], addr6p[2], addr6p[3],
		      addr6p[4], addr6p[5], addr6p[6], addr6p[7],
		  &if_idx, &plen, &scope, &dad_status, devname) != EOF) {
	    if (!strcmp(devname, ptr->name)) {
		sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
			addr6p[0], addr6p[1], addr6p[2], addr6p[3],
			addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
		inet6_aftype.input(1, addr6, (struct sockaddr *) &sap);
		printf(_("          inet6 addr: %s/%d"),
		 inet6_aftype.sprint((struct sockaddr *) &sap, 1), plen);
		printf(_(" Scope:"));
		switch (scope) {
		case 0:
		    printf(_("Global"));
		    break;
		case IPV6_ADDR_LINKLOCAL:
		    printf(_("Link"));
		    break;
		case IPV6_ADDR_SITELOCAL:
		    printf(_("Site"));
		    break;
		case IPV6_ADDR_COMPATv4:
		    printf(_("Compat"));
		    break;
		case IPV6_ADDR_LOOPBACK:
		    printf(_("Host"));
		    break;
		default:
		    printf(_("Unknown"));
		}
		printf("\n");
	    }
	}
	fclose(f);
    }
#endif

#if HAVE_AFIPX
    if (ipxtype == NULL)
	ipxtype = get_afntype(AF_IPX);

    if (ipxtype != NULL) {
	if (ptr->has_ipx_bb)
	    printf(_("          IPX/Ethernet II addr:%s\n"),
		   ipxtype->sprint(&ptr->ipxaddr_bb, 1));
	if (ptr->has_ipx_sn)
	    printf(_("          IPX/Ethernet SNAP addr:%s\n"),
		   ipxtype->sprint(&ptr->ipxaddr_sn, 1));
	if (ptr->has_ipx_e2)
	    printf(_("          IPX/Ethernet 802.2 addr:%s\n"),
		   ipxtype->sprint(&ptr->ipxaddr_e2, 1));
	if (ptr->has_ipx_e3)
	    printf(_("          IPX/Ethernet 802.3 addr:%s\n"),
		   ipxtype->sprint(&ptr->ipxaddr_e3, 1));
    }
#endif

#if HAVE_AFATALK
    if (ddptype == NULL)
	ddptype = get_afntype(AF_APPLETALK);
    if (ddptype != NULL) {
	if (ptr->has_ddp)
	    printf(_("          EtherTalk Phase 2 addr:%s\n"), ddptype->sprint(&ptr->ddpaddr, 1));
    }
#endif

#if HAVE_AFECONET
    if (ectype == NULL)
	ectype = get_afntype(AF_ECONET);
    if (ectype != NULL) {
	if (ptr->has_econet)
	    printf(_("          econet addr:%s\n"), ectype->sprint(&ptr->ecaddr, 1));
    }
#endif

    printf("          ");
    /* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
    if (ptr->flags == 0)
	printf(_("[NO FLAGS] "));
    if (ptr->flags & IFF_UP)
	printf(_("UP "));
    if (ptr->flags & IFF_BROADCAST)
	printf(_("BROADCAST "));
    if (ptr->flags & IFF_DEBUG)
	printf(_("DEBUG "));
    if (ptr->flags & IFF_LOOPBACK)
	printf(_("LOOPBACK "));
    if (ptr->flags & IFF_POINTOPOINT)
	printf(_("POINTOPOINT "));
    if (ptr->flags & IFF_NOTRAILERS)
	printf(_("NOTRAILERS "));
    if (ptr->flags & IFF_RUNNING)
	printf(_("RUNNING "));
    if (ptr->flags & IFF_NOARP)
	printf(_("NOARP "));
    if (ptr->flags & IFF_PROMISC)
	printf(_("PROMISC "));
    if (ptr->flags & IFF_ALLMULTI)
	printf(_("ALLMULTI "));
    if (ptr->flags & IFF_SLAVE)
	printf(_("SLAVE "));
    if (ptr->flags & IFF_MASTER)
	printf(_("MASTER "));
    if (ptr->flags & IFF_MULTICAST)
	printf(_("MULTICAST "));
#ifdef HAVE_DYNAMIC
    if (ptr->flags & IFF_DYNAMIC)
	printf(_("DYNAMIC "));
#endif
    /* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
    printf(_(" MTU:%d  Metric:%d"),
	   ptr->mtu, ptr->metric ? ptr->metric : 1);
#ifdef SIOCSKEEPALIVE
    if (ptr->outfill || ptr->keepalive)
	printf(_("  Outfill:%d  Keepalive:%d"),
	       ptr->outfill, ptr->keepalive);
#endif
    printf("\n");

    /* If needed, display the interface statistics. */

    if (ptr->statistics_valid) {
	printf("          ");

	printf(_("RX packets:%Lu errors:%lu dropped:%lu overruns:%lu frame:%lu\n"),
	       ptr->stats.rx_packets, ptr->stats.rx_errors,
	       ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
	       ptr->stats.rx_frame_errors);
	if (can_compress)
	    printf(_("             compressed:%lu\n"), ptr->stats.rx_compressed);
	printf("          ");
	printf(_("TX packets:%Lu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n"),
	       ptr->stats.tx_packets, ptr->stats.tx_errors,
	       ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
	       ptr->stats.tx_carrier_errors);
	printf(_("          collisions:%lu "), ptr->stats.collisions);
	if (can_compress)
	    printf(_("compressed:%lu "), ptr->stats.tx_compressed);
	if (ptr->tx_queue_len != -1)
	    printf(_("txqueuelen:%d "), ptr->tx_queue_len);
	printf("\n          R");
	print_bytes_scaled(ptr->stats.rx_bytes, "  T");
	print_bytes_scaled(ptr->stats.tx_bytes, "\n");

    }

    if ((ptr->map.irq || ptr->map.mem_start || ptr->map.dma ||
	 ptr->map.base_addr)) {
	printf("          ");
	if (ptr->map.irq)
	    printf(_("Interrupt:%d "), ptr->map.irq);
	if (ptr->map.base_addr >= 0x100)	/* Only print devices using it for 
						   I/O maps */
	    printf(_("Base address:0x%x "), ptr->map.base_addr);
	if (ptr->map.mem_start) {
	    printf(_("Memory:%lx-%lx "), ptr->map.mem_start, ptr->map.mem_end);
	}
	if (ptr->map.dma)
	    printf(_("DMA chan:%x "), ptr->map.dma);
	printf("\n");
    }
    printf("\n");
}


static int do_if_print(struct interface *ife, void *cookie)
{
    int *opt_a = (int *) cookie;
    int res; 

    res = do_if_fetch(ife); 
    if (res >= 0) {   
	if ((ife->flags & IFF_UP) || *opt_a)
	    ife_print(ife);
    }
    return res;
}

static struct interface *lookup_interface(char *name)
{
    struct interface *ife = NULL;

    if (if_readlist_proc(name) < 0) 
	    return NULL; 
    ife = add_interface(name); 
    return ife;
}

/* for ipv4 add/del modes */
static int if_print(char *ifname)
{
    int res;

    if (!ifname) {
	res = for_all_interfaces(do_if_print, &interface_opt_a);
    } else {
	struct interface *ife;

	ife = lookup_interface(ifname);
	res = do_if_fetch(ife); 
	if (res >= 0) 
	    ife_print(ife);
    }
    return res; 
}

int display_interfaces(char *ifname)
{
    int status;

    /* Create a channel to the NET kernel. */
    if ((skfd = sockets_open(0)) < 0) {
		perror_msg_and_die("socket");
    }

    /* Do we have to show the current setup? */
    status = if_print(ifname);
    close(skfd);
    exit(status < 0);
}