1 files changed, 132 insertions, 0 deletions
diff --git a/utils/open-isns/sysdep-unix.c b/utils/open-isns/sysdep-unix.c
new file mode 100644
index 0000000..8c601a7
--- /dev/null
+++ b/utils/open-isns/sysdep-unix.c
@@ -0,0 +1,132 @@
+/*
+ * System dependent stuff
+ *
+ * Copyright (C) 2007 Olaf Kirch <olaf.kirch@oracle.com>
+ */
+
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <string.h>
+#include <unistd.h>
+#include "isns.h"
+#include "util.h"
+
+int
+isns_enumerate_portals(isns_portal_info_t *result, unsigned int max)
+{
+	char		buffer[8192], *end, *ptr;
+	struct ifconf	ifc;
+	unsigned int	nportals = 0;
+	int		fd = -1;
+
+	if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
+		isns_error("%s: no socket - %m\n", __FUNCTION__);
+		return 0;
+	}
+
+	ifc.ifc_buf = buffer;
+	ifc.ifc_len = sizeof(buffer);
+	if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
+		isns_error("ioctl(SIOCGIFCONF): %m\n");
+		goto out;
+	}
+
+	ptr = buffer;
+	end = buffer + ifc.ifc_len;
+	while (ptr < end) {
+		struct ifreq	ifr;
+		struct sockaddr_storage ifaddr;
+		isns_portal_info_t portal;
+		int		ifflags;
+
+		memcpy(&ifr, ptr, sizeof(ifr));
+		ptr += sizeof(ifr);
+
+		/* Get the interface addr */
+		memcpy(&ifaddr, &ifr.ifr_addr, sizeof(ifr.ifr_addr));
+
+		if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
+			isns_error("ioctl(%s, SIOCGIFFLAGS): %m\n",
+					ifr.ifr_name);
+			continue;
+		}
+		ifflags = ifr.ifr_flags;
+
+		if ((ifflags & IFF_UP) == 0)
+			continue;
+		if ((ifflags & IFF_LOOPBACK) != 0)
+			continue;
+
+		if (!isns_portal_from_sockaddr(&portal, &ifaddr))
+			continue;
+
+		isns_debug_socket("Got interface %u: %s %s\n",
+				nportals, ifr.ifr_name,
+				isns_portal_string(&portal));
+		if (nportals < max)
+			result[nportals++] = portal;
+	}
+
+out:
+	if (fd >= 0)
+		close(fd);
+	return nportals;
+}
+
+int
+isns_portal_from_sockaddr(isns_portal_info_t *portal,
+		const struct sockaddr_storage *addr)
+{
+	struct sockaddr_in6 *six;
+	struct sockaddr_in *sin;
+
+	memset(portal, 0, sizeof(*portal));
+
+	/* May have to convert AF_INET to AF_INET6 */
+	six = &portal->addr;
+	switch (addr->ss_family) {
+	case AF_INET6:
+		memcpy(six, addr, sizeof(*six));
+		break;
+
+	case AF_INET:
+		sin = (struct sockaddr_in *) addr;
+		six->sin6_family = AF_INET6;
+		six->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
+		six->sin6_port = sin->sin_port;
+		break;
+
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+int
+isns_portal_to_sockaddr(const isns_portal_info_t *portal,
+		struct sockaddr_storage *addr)
+{
+	const struct sockaddr_in6 *six = &portal->addr;
+	struct sockaddr_in *sin;
+
+	/* Check if this is really a v4 address is disguise.
+	 * If so, explicitly use an AF_INET socket - the
+	 * stack may not support IPv6.
+	 */
+	if (IN6_IS_ADDR_V4MAPPED(&six->sin6_addr)
+	 || IN6_IS_ADDR_V4COMPAT(&six->sin6_addr)) {
+		sin = (struct sockaddr_in *) addr;
+
+		memset(sin, 0, sizeof(*sin));
+		sin->sin_family = AF_INET;
+		sin->sin_addr.s_addr = six->sin6_addr.s6_addr32[3];
+		sin->sin_port = six->sin6_port;
+
+		return sizeof(*sin);
+	}
+	
+	/* This is the genuine article */
+	memcpy(addr, six, sizeof(*six));
+	return sizeof(*six);
+}