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ip/dhcp6d: only announce all-dhcp-servers multicast address on interface with link-local address on it

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This commit is contained in:
cinap_lenrek 2018-06-12 19:36:31 +02:00
parent fca2c1cb31
commit b9b6fcd85f
1 changed files with 7 additions and 4 deletions
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11
sys/src/cmd/ip/dhcp6d.c
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@ -134,6 +134,7 @@ openlisten(char *net)
int fd, cfd;
char data[128], devdir[40];
Ipifc *ifc;
Iplifc *lifc;
sprint(data, "%s/udp!*!dhcp6s", net);
cfd = announce(data, devdir);
@ -144,12 +145,14 @@ openlisten(char *net)
ipifcs = readipifc(net, ipifcs, -1);
for(ifc = ipifcs; ifc != nil; ifc = ifc->next){
if(ifc->lifc == nil)
continue;
if(strcmp(ifc->dev, "/dev/null") == 0)
continue;
if(fprint(cfd, "addmulti %I ff02::1:2", ifc->lifc->ip) < 0)
fprint(2, "can't add interface %s: %r", ifc->dev);
for(lifc = ifc->lifc; lifc != nil; lifc = lifc->next){
if(ISIPV6LINKLOCAL(lifc->ip))
continue;
if(fprint(cfd, "addmulti %I ff02::1:2", lifc->ip) < 0)
fprint(2, "addmulti: %I: %r\n", lifc->ip);
}
}
sprint(data, "%s/data", devdir);