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Change read_leases() to skip invalid entries.

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There's no reason to stop reading the existing lease file
when dnsmasq is started and an invalid entry is found, it
can just be ignored.  This was fallout from an Openstack
bug where the file was being written incorrectly with []
around IPv6 addresses.
This commit is contained in:
Brian Haley
2019-01-17 23:21:23 +00:00
committed by Simon Kelley
parent d2d4990743
commit 28cfe36e1e
1 changed files with 15 additions and 7 deletions
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22
src/lease.c
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@@ -60,8 +60,13 @@ static int read_leases(time_t now, FILE *leasestream)
if (fscanf(leasestream, " %64s %255s %764s",
daemon->namebuff, daemon->dhcp_buff, daemon->packet) != 3)
return 0;
{
my_syslog(MS_DHCP | LOG_WARNING, _("ignoring invalid line in lease database: %s %s %s %s ..."),
daemon->dhcp_buff3, daemon->dhcp_buff2,
daemon->namebuff, daemon->dhcp_buff);
continue;
}
if (inet_pton(AF_INET, daemon->namebuff, &addr.addr4))
{
if ((lease = lease4_allocate(addr.addr4)))
@@ -92,7 +97,12 @@ static int read_leases(time_t now, FILE *leasestream)
}
#endif
else
return 0;
{
my_syslog(MS_DHCP | LOG_WARNING, _("ignoring invalid line in lease database, bad address: %s"),
daemon->namebuff);
continue;
}
if (!lease)
die (_("too many stored leases"), NULL, EC_MISC);
@@ -172,10 +182,8 @@ void lease_init(time_t now)
if (leasestream)
{
if (!read_leases(now, leasestream))
my_syslog(MS_DHCP | LOG_ERR, _("failed to parse lease database, invalid line: %s %s %s %s ..."),
daemon->dhcp_buff3, daemon->dhcp_buff2,
daemon->namebuff, daemon->dhcp_buff);
my_syslog(MS_DHCP | LOG_ERR, _("failed to parse lease database cleanly"));
if (ferror(leasestream))
die(_("failed to read lease file %s: %s"), daemon->lease_file, EC_FILE);
}