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mobile: enable IPv6CP

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This patch lets pppd negotiate IPv6 parameters using IPV6CP. It allows
dual-stack mobile broadband to work correctly.

Due to the fact that ModemManager hard-codes use of IPv4-only PDP type,
the PDP context must manually be defined first using for example
AT+CGDCONT=1,"IPV4V6","apn". (ModemManager does not overwrite an
already-defined PDP context with the correct APN.)

IPV6CP is not considered essential, so when connecting using an IPv4-
only PDP context, pppd gives up after a retransmitting a few IPV6CP
ConfReqs. The retransmissions happen asynchronously, pppd nor NM waits
for them to finish before activating the IPv4 part of the connections.

The patch also makes pppd support IPv6-only connections (because IPCP
isn't considered essential by pppd either), however NM will currently
fail the entire connection if IPCP/IPv4 doesn't succeed.
This commit is contained in:
Tore Anderson 2012-04-06 14:09:38 +02:00 • committed by Dan Williams
parent 157f184706
commit 7575f4d1e4
1 changed files with 4 additions and 0 deletions
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4
src/ppp-manager/nm-ppp-manager.c
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@ -827,6 +827,10 @@ create_pppd_cmd_line (NMPPPManager *self,
/* NM handles setting the default route */
nm_cmd_line_add_string (cmd, "nodefaultroute");
/* Allow IPv6 to be configured by IPV6CP */
nm_cmd_line_add_string (cmd, "ipv6");
nm_cmd_line_add_string (cmd, ",");
ppp_debug = !!getenv ("NM_PPP_DEBUG");
if ( nm_logging_level_enabled (LOGL_DEBUG)
&& nm_logging_domain_enabled (LOGD_PPP))