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IPv6: Implement RFC 8981 #744

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IPv6: Implement RFC 8981 #744

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7d12c97
IPv6: Implement RFC 8981
rsmarples Oct 15, 2026
4f14648
Fix formatting
rsmarples Oct 15, 2026
659ffde
true
rsmarples Oct 15, 2026
adba1dd
Fix review comments
rsmarples Oct 15, 2026
b66bada
IPv6ND: Mark all prefixes as failed when matching temp addrs fail DAD
rsmarples Oct 19, 2026
a237686
Address review comments
rsmarples Oct 19, 2026
a975354
IPv6: Don't regen failed temp addresses
rsmarples Oct 19, 2026
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6 changes: 3 additions & 3 deletions src/dhcpcd.8.in
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Original file line number Diff line number Diff line change
Expand Up @@ -131,7 +131,7 @@ and
.Nm
is also an implementation of the IPv6 Privacy Extensions to AutoConf as
specified in
.Li RFC 4941 .
.Li RFC 8981 .
This feature needs to be enabled in the kernel and
.Nm
will start using it.
Expand Down Expand Up @@ -876,8 +876,8 @@ RFC\ 951, RFC\ 1534, RFC\ 2104, RFC\ 2131, RFC\ 2132, RFC\ 2563, RFC\ 2855,
RFC\ 3004, RFC\ 3118, RFC\ 3203, RFC\ 3315, RFC\ 3361, RFC\ 3633, RFC\ 3396,
RFC\ 3397, RFC\ 3442, RFC\ 3495, RFC\ 3925, RFC\ 3927, RFC\ 4039, RFC\ 4075,
RFC\ 4242, RFC\ 4361, RFC\ 4390, RFC\ 4702, RFC\ 4074, RFC\ 4861, RFC\ 4833,
RFC\ 4941, RFC\ 5227, RFC\ 5942, RFC\ 5969, RFC\ 6106, RFC\ 6334, RFC\ 6355,
RFC\ 6603, RFC\ 6704, RFC\ 7217, RFC\ 7550, RFC\ 7844.
RFC\ 5227, RFC\ 5942, RFC\ 5969, RFC\ 6106, RFC\ 6334, RFC\ 6355,
RFC\ 6603, RFC\ 6704, RFC\ 7217, RFC\ 7550, RFC\ 7844, RFC\ 8981.
.Sh AUTHORS
.An Roy Marples Aq Mt roy@marples.name
.Sh BUGS
Expand Down
2 changes: 1 addition & 1 deletion src/dhcpcd.c
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Expand Up @@ -860,7 +860,7 @@ dhcpcd_handlecarrier(struct interface *ifp, int carrier, unsigned int flags)
* would normally as we maybe on a new network. */
ipv6nd_startexpire(ifp);
#ifdef IPV6_MANAGETEMPADDR
/* RFC4941 Section 3.5 */
/* RFC 8981 Section 3.6 */
ipv6_regentempaddrs(ifp);
#endif
#endif
Expand Down
4 changes: 2 additions & 2 deletions src/dhcpcd.conf.5.in
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Expand Up @@ -733,7 +733,7 @@ The default is 180 seconds.
.It Ic ssid Ar ssid
Subsequent options are only parsed for this wireless
.Ar ssid .
.It Ic slaac Ic hwaddr | Ic private | Ic token Ar token Op Ic temp | Ic temporary
.It Ic slaac Oo Ic hwaddr | Ic private | Ic token Ar token Oc Oo Ic temp | Ic temporary Oc
Selects the interface identifier used for SLAAC generated IPv6 addresses.
If
.Ic private
Expand All @@ -743,7 +743,7 @@ If
is used then the token is combined with the prefix to make the final address.
The
.Ic temporary
directive will create a temporary address for the prefix as well.
directive will create a RFC 8981 temporary address for the prefix.
.It Ic static Ar value
Configures a static
.Ar value .
Expand Down
45 changes: 26 additions & 19 deletions src/if-options.c
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Expand Up @@ -2525,30 +2525,37 @@ parse_option(struct dhcpcd_ctx *ctx, const char *ifname, struct if_options *ifo,
}
if (strcmp(arg, "private") == 0 ||
strcmp(arg, "stableprivate") == 0 ||
strcmp(arg, "stable") == 0)
strcmp(arg, "stable") == 0) {
ifo->options |= DHCPCD_SLAACPRIVATE;
else
arg = np;
} else {
ifo->options &= ~DHCPCD_SLAACPRIVATE;
#ifdef INET6
if (strcmp(arg, "token") == 0) {
if (np == NULL) {
logerrx("slaac token: no token specified");
return -1;
}
arg = np;
np = strwhite(np);
if (np != NULL) {
*np++ = '\0';
np = strskipwhite(np);
}
if (inet_pton(AF_INET6, arg, &ifo->token) != 1) {
logerrx("slaac token: invalid token");
return -1;
if (strcmp(arg, "token") == 0) {
if (np == NULL) {
logerrx(
"slaac token: no token specified");
return -1;
}
arg = np;
np = strwhite(np);
if (np != NULL) {
*np++ = '\0';
np = strskipwhite(np);
}
if (inet_pton(AF_INET6, arg, &ifo->token) !=
1) {
logerrx("slaac token: invalid token");
return -1;
}
arg = np;
}
}
#endif
if (np != NULL &&
(strcmp(np, "temp") == 0 || strcmp(np, "temporary") == 0))
}

if (arg == NULL)
break;
if (strcmp(arg, "temp") == 0 || strcmp(arg, "temporary") == 0)
Comment thread
coderabbitai[bot] marked this conversation as resolved.
ifo->options |= DHCPCD_SLAACTEMP;
break;
case O_BOOTP:
Expand Down
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