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netconfig: Allow consecutive calls to _load_settings()

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Make consecutive calls to netconfig_load_settings() memory-leak safe by
introducing a netconfig_free_settings convenience method.  This method
will free any settings that are allocated as a result of
netconfig_load_settings() and will be called from netconfig_free() to
ensure that any settings are freed as a result of netconfig_destroy().
This commit is contained in:
Denis Kenzior 2021-09-29 15:54:41 -05:00
parent 3021472358
commit 7f55a241a4
1 changed files with 17 additions and 6 deletions
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23
src/netconfig.c
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@ -126,6 +126,17 @@ static int sysfs_write_ipv6_setting(const char *ifname, const char *setting,
return r; return r;
} }
static void netconfig_free_settings(struct netconfig *netconfig)
{
l_rtnl_address_free(netconfig->v4_address);
netconfig->v4_address = NULL;
l_strfreev(netconfig->dns4_overrides);
netconfig->dns4_overrides = NULL;
l_strfreev(netconfig->dns6_overrides);
netconfig->dns6_overrides = NULL;
}
static void netconfig_free(void *data) static void netconfig_free(void *data)
{ {
struct netconfig *netconfig = data; struct netconfig *netconfig = data;
@ -1308,12 +1319,7 @@ bool netconfig_load_settings(struct netconfig *netconfig,
} }
/* No more validation steps for now, commit new values */ /* No more validation steps for now, commit new values */
netconfig->rtm_protocol = v4_address ? RTPROT_STATIC : RTPROT_DHCP;
if (v4_address) {
netconfig->v4_address = v4_address;
netconfig->rtm_protocol = RTPROT_STATIC;
} else
netconfig->rtm_protocol = RTPROT_DHCP;
if (!v6_enabled) if (!v6_enabled)
netconfig->rtm_v6_protocol = RTPROT_UNSPEC; netconfig->rtm_v6_protocol = RTPROT_UNSPEC;
@ -1328,6 +1334,11 @@ bool netconfig_load_settings(struct netconfig *netconfig,
resolve_set_mdns(netconfig->resolve, mdns); resolve_set_mdns(netconfig->resolve, mdns);
l_free(mdns); l_free(mdns);
netconfig_free_settings(netconfig);
if (netconfig->rtm_protocol == RTPROT_STATIC)
netconfig->v4_address = v4_address;
netconfig->active_settings = active_settings; netconfig->active_settings = active_settings;
netconfig->dns4_overrides = dns4_overrides; netconfig->dns4_overrides = dns4_overrides;
netconfig->dns6_overrides = dns6_overrides; netconfig->dns6_overrides = dns6_overrides;