diff options
Diffstat (limited to 'setif.c')
| -rw-r--r-- | setif.c | 51 |
1 files changed, 51 insertions, 0 deletions
@@ -23,8 +23,11 @@ #include <netlink/handlers.h> #include <netlink/msg.h> +#include "logging.h" #include "netlink_msg.h" +#define DEBUG_OPTNAME(a) case (a): { optname = #a; break; } + /* function: add_address * adds an IP address to/from an interface, returns 0 on success and <0 on failure * ifname - name of interface to change @@ -127,3 +130,51 @@ cleanup: return retval; } + +static int do_anycast_setsockopt(int sock, int what, struct in6_addr *addr, int ifindex) { + struct ipv6_mreq mreq = { *addr, ifindex }; + char *optname; + int ret; + + switch (what) { + DEBUG_OPTNAME(IPV6_JOIN_ANYCAST) + DEBUG_OPTNAME(IPV6_LEAVE_ANYCAST) + default: + optname = "???"; + break; + } + + ret = setsockopt(sock, SOL_IPV6, what, &mreq, sizeof(mreq)); + if (ret) { + logmsg(ANDROID_LOG_ERROR, "%s: setsockopt(%s): %s", __func__, optname, strerror(errno)); + } + + return ret; +} + +/* function: add_anycast_address + * adds an anycast IPv6 address to an interface, returns 0 on success and <0 on failure + * sock - the socket to add the address to + * addr - the IP address to add + * ifname - name of interface to add the address to + */ +int add_anycast_address(int sock, struct in6_addr *addr, const char *ifname) { + int ifindex, s, ret; + + ifindex = if_nametoindex(ifname); + if (!ifindex) { + logmsg(ANDROID_LOG_ERROR, "%s: unknown ifindex for interface %s", __func__, ifname); + return -ENODEV; + } + + return do_anycast_setsockopt(sock, IPV6_JOIN_ANYCAST, addr, ifindex); +} + +/* function: del_anycast_address + * removes an anycast IPv6 address from the system, returns 0 on success and <0 on failure + * sock - the socket to remove from, must have had the address added via add_anycast_address + * addr - the IP address to remove + */ +int del_anycast_address(int sock, struct in6_addr *addr) { + return do_anycast_setsockopt(sock, IPV6_LEAVE_ANYCAST, addr, 0); +} |