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musl: fix handling of point-to-point interfaces in getifaddrs()

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Current musl reports the peer (remote) address of a point-to-point
interface and does not store the local address at all.

Apply the same special treatment of IFA_LOCAL to musl's getifaddrs() which
is also used in glibc and uclibc.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 47488
This commit is contained in:
Jo-Philipp Wich 2015-11-16 18:15:00 +00:00
parent d99af7f05a
commit ab11edcd4c
1 changed files with 18 additions and 0 deletions
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18
toolchain/musl/patches/920-getifaddrs_ptp_fix.patch Normal file
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@ -0,0 +1,18 @@
--- a/src/network/getifaddrs.c
+++ b/src/network/getifaddrs.c
@@ -161,6 +161,15 @@ static int netlink_msg_to_ifaddr(void *p
ifs->ifa.ifa_flags = ifs0->ifa.ifa_flags;
for (rta = NLMSG_RTA(h, sizeof(*ifa)); NLMSG_RTAOK(rta, h); rta = RTA_NEXT(rta)) {
switch (rta->rta_type) {
+ case IFA_LOCAL:
+ /* If ifa_addr is set and we get IFA_LOCAL, assume we have
+ * a point-to-point network. Move address to correct field. */
+ if (ifs->ifa.ifa_addr != NULL) {
+ ifs->ifu = ifs->addr;
+ ifs->ifa.ifa_broadaddr = &ifs->ifu.sa;
+ memset(&ifs->addr, 0, sizeof(ifs->addr));
+ }
+ /* fall through */
case IFA_ADDRESS:
copy_addr(&ifs->ifa.ifa_addr, ifa->ifa_family, &ifs->addr, RTA_DATA(rta), RTA_DATALEN(rta), ifa->ifa_index);
break;