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| author | Denys Vlasenko | 2017-03-27 22:10:15 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2017-03-27 22:41:59 +0200 |
| commit | e09f5e3045fc90547be9ec49c63b633d103cfc45 (patch) | |
| tree | 5044ae5060fec01909714eaab1da3567993cd222 /networking/udhcp/d6_socket.c | |
| parent | 8f3bf4f0d3605b50a8e4c48c89aeabc455f04884 (diff) | |
| download | busybox-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.c | 61 |
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) { |