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authorDenys Vlasenko2017-03-27 22:10:15 +0200
committerDenys Vlasenko2017-03-27 22:41:59 +0200
commite09f5e3045fc90547be9ec49c63b633d103cfc45 (patch)
tree5044ae5060fec01909714eaab1da3567993cd222 /networking/udhcp/d6_socket.c
parent8f3bf4f0d3605b50a8e4c48c89aeabc455f04884 (diff)
downloadbusybox-e09f5e3045fc90547be9ec49c63b633d103cfc45.zip
busybox-e09f5e3045fc90547be9ec49c63b633d103cfc45.tar.gz
udhcp6: read_interface should save link-local ipv6 address
Patch is based on work by tiggerswelt.net. They say: "Using this patch it was no problem to acquire an IPv6-Address via DHCPv6 using ISC DHCPD6 on server-side." Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/udhcp/d6_socket.c')
-rw-r--r--networking/udhcp/d6_socket.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/networking/udhcp/d6_socket.c b/networking/udhcp/d6_socket.c
index 910f296..930e5e4 100644
--- a/networking/udhcp/d6_socket.c
+++ b/networking/udhcp/d6_socket.c
@@ -7,6 +7,67 @@
#include "common.h"
#include "d6_common.h"
#include <net/if.h>
+#include <ifaddrs.h>
+#include <netpacket/packet.h>
+
+int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_addr *nip6, uint8_t *mac)
+{
+ int retval = 3;
+ struct ifaddrs *ifap, *ifa;
+
+ getifaddrs(&ifap);
+
+ for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
+ struct sockaddr_in6 *sip6;
+
+ if (!ifa->ifa_addr || (strcmp(ifa->ifa_name, interface) != 0))
+ continue;
+
+ sip6 = (struct sockaddr_in6*)(ifa->ifa_addr);
+
+ if (ifa->ifa_addr->sa_family == AF_PACKET) {
+ struct sockaddr_ll *sll = (struct sockaddr_ll*)(ifa->ifa_addr);
+ memcpy(mac, sll->sll_addr, 6);
+ log1("MAC %02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+ log1("adapter index %d", sll->sll_ifindex);
+ *ifindex = sll->sll_ifindex;
+ retval &= (0xf - (1<<0));
+ }
+#if 0
+ if (ifa->ifa_addr->sa_family == AF_INET) {
+ *nip = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr;
+ log1("IP %s", inet_ntoa(((struct sockaddr_in *)ifa->ifa_addr)->sin_addr));
+ }
+#endif
+ if (ifa->ifa_addr->sa_family == AF_INET6
+ && IN6_IS_ADDR_LINKLOCAL(&sip6->sin6_addr)
+ ) {
+ *nip6 = sip6->sin6_addr; /* struct copy */
+ log1(
+ "IPv6 %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x",
+ nip6->s6_addr[0], nip6->s6_addr[1],
+ nip6->s6_addr[2], nip6->s6_addr[3],
+ nip6->s6_addr[4], nip6->s6_addr[5],
+ nip6->s6_addr[6], nip6->s6_addr[7],
+ nip6->s6_addr[8], nip6->s6_addr[9],
+ nip6->s6_addr[10], nip6->s6_addr[11],
+ nip6->s6_addr[12], nip6->s6_addr[13],
+ nip6->s6_addr[14], nip6->s6_addr[15]
+ );
+ retval &= (0xf - (1<<1));
+ }
+ }
+
+ freeifaddrs(ifap);
+ if (retval == 0)
+ return retval;
+
+ if (retval & (1<<0))
+ bb_error_msg("can't get %s", "MAC");
+ if (retval & (1<<1))
+ bb_error_msg("can't get %s", "link-local IPv6 address");
+ return -1;
+}
int FAST_FUNC d6_listen_socket(int port, const char *inf)
{