dhcpcd-6.8.2: assign interface index in get_interface

In if_discover, the interface struct's index member
(ifp->index) is assigned from the sll_ifindex member of
of ifa->if_addr (see if.c:490). However, this member is
not set in the get_interface function of ifaddrs.c. This
unitialized interface index member is later used to bind
a socket and send messages on it, which leads to errors.

Assign the interface index of selected interface in
get_interface to fix this.

BUG: 22956197
Change-Id: I41da8fc7abdf3f5fc05c1dc0446d2a1d9dc7557d

1 files changed, 1 insertions, 0 deletions

diff --git a/ifaddrs.c b/ifaddrs.c
index a88bcc1..1a27d8f 100644
--- a/ifaddrs.c
+++ b/ifaddrs.c
@@ -84,6 +84,7 @@ struct ifaddrs *get_interface(const char *name, sa_family_t family)
                 memset(hwaddr, 0, sizeof(struct sockaddr_ll));
                 hwaddr->sll_family = family;
                 /* hwaddr->sll_protocol = ETHERTYPE_IP; */
+                ifc_get_ifindex(ifa->ifa_name, &hwaddr->sll_ifindex);
                 hwaddr->sll_hatype = ARPHRD_ETHER;
                 hwaddr->sll_halen = ETH_ALEN;
                 memcpy(hwaddr->sll_addr, hwbuf, ETH_ALEN);