C++ (Cpp) ipv4_getnetmask Examples

Example #1

File: if-options.c Project: enukane/netbsd-src

static int
parse_addr(struct in_addr *addr, struct in_addr *net, const char *arg)
{
	char *p;
	int i;

	if (arg == NULL || *arg == '\0') {
		if (addr != NULL)
			addr->s_addr = 0;
		if (net != NULL)
			net->s_addr = 0;
		return 0;
	}
	if ((p = strchr(arg, '/')) != NULL) {
		*p++ = '\0';
		if (net != NULL &&
		    (sscanf(p, "%d", &i) != 1 ||
			inet_cidrtoaddr(i, net) != 0))
		{
			syslog(LOG_ERR, "`%s' is not a valid CIDR", p);
			return -1;
		}
	}

	if (addr != NULL && inet_aton(arg, addr) == 0) {
		syslog(LOG_ERR, "`%s' is not a valid IP address", arg);
		return -1;
	}
	if (p != NULL)
		*--p = '/';
	else if (net != NULL && addr != NULL)
		net->s_addr = ipv4_getnetmask(addr->s_addr);
	return 0;
}

Example #2

File: ibd.c Project: apprisi/illumos-gate

/* ARGSUSED */
static int
ibd_output(int index, struct inetgram *ogp)
{
	int			header_len, result;
	ipoib_ptxhdr_t		eh;
	struct ip		*ip;
	struct in_addr		tmpip, ipdst;
	int			broadcast = FALSE;
	int			size;
	mblk_t			*mp;

	if (!initialized)
		prom_panic("IPoIB device is not initialized.");

	if (ogp->igm_level != MEDIA_LVL) {
		dprintf("ibd_output: frame type wrong: socket: %d\n",
		    index * SOCKETTYPE);
		errno = EINVAL;
		return (-1);
	}

	header_len = IPOIB_HDRSIZE + IPOIB_ADDRL;
	mp = ogp->igm_mp;
	size = mp->b_wptr - mp->b_rptr;
	if (size > (mac_state.mac_mtu - IPOIB_ADDRL)) {
		dprintf("ibd_output: frame size too big: %d\n", size);
		errno = E2BIG;
		return (-1);
	}

	size += header_len;
	ip = (struct ip *)(mp->b_rptr);

	eh.ipoib_rhdr.ipoib_type = htons(ETHERTYPE_IP);
	eh.ipoib_rhdr.ipoib_mbz = 0;
	bcopy((caddr_t)&ip->ip_dst, (caddr_t)&ipdst, sizeof (ipdst));

	if (ipdst.s_addr == htonl(INADDR_BROADCAST))
		broadcast = TRUE; /* limited broadcast */

	if (!broadcast) {
		struct in_addr mask;

		ipv4_getnetmask(&mask);
		mask.s_addr = htonl(mask.s_addr);
		if (mask.s_addr != htonl(INADDR_BROADCAST) &&
		    (ipdst.s_addr & ~mask.s_addr) == 0) {
			broadcast = TRUE; /* directed broadcast */
		} else {
			if (ogp->igm_router.s_addr != htonl(INADDR_ANY))
				tmpip.s_addr = ogp->igm_router.s_addr;
			else
				tmpip.s_addr = ipdst.s_addr;

			result = mac_get_arp(&tmpip, (void *)&eh.ipoib_dest,
			    IPOIB_ADDRL, mac_state.mac_arp_timeout);
			if (!result) {
				errno = ETIMEDOUT;
				dprintf("ibd_output: ARP request for %s "
				    "timed out.\n", inet_ntoa(tmpip));
				return (-1);
			}
		}
	}

	if (broadcast)
		bcopy((caddr_t)&ibdbroadcastaddr, (caddr_t)&eh.ipoib_dest,
		    IPOIB_ADDRL);

	/* add the ibd header */
	mp->b_rptr -= sizeof (eh);
	bcopy((caddr_t)&eh, mp->b_rptr, sizeof (eh));

#ifdef	DEBUG
	printf("ibd_output(%d): level(%d) frame(0x%x) len(%d)\n",
	    index, ogp->igm_level, mp->b_rptr, size);
#endif	/* DEBUG */

	return (prom_write(mac_state.mac_dev, (char *)mp->b_rptr, size,
	    0, NETWORK));
}