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import of dnsmasq-2.34.tar.gz

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This commit is contained in:
Simon Kelley
2006-10-16 20:04:18 +01:00
parent 208b65c5cf
commit 1697269ce7
33 changed files with 3660 additions and 2711 deletions
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177
src/lease.c
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@@ -418,8 +418,11 @@ void lease_set_hostname(struct dhcp_lease *lease, char *name, char *suffix, int
{
if (lease_tmp->auth_name && !auth)
return;
lease_tmp->changed = 1; /* call script on change */
new_name = lease_tmp->hostname;
/* this shouldn't happen unless updates are very quick and the
script very slow, we just avoid a memory leak if it does. */
if (lease_tmp->old_hostname)
free(lease_tmp->old_hostname);
lease_tmp->old_hostname = lease_tmp->hostname;
lease_tmp->hostname = NULL;
if (lease_tmp->fqdn)
{
@@ -441,7 +444,13 @@ void lease_set_hostname(struct dhcp_lease *lease, char *name, char *suffix, int
}
if (lease->hostname)
free(lease->hostname);
{
/* run script to say we lost our old name */
if (lease->old_hostname)
free(lease->old_hostname);
lease->old_hostname = lease->hostname;
}
if (lease->fqdn)
free(lease->fqdn);
@@ -454,121 +463,81 @@ void lease_set_hostname(struct dhcp_lease *lease, char *name, char *suffix, int
lease->changed = 1; /* run script on change */
}
#ifndef NO_FORK
static pid_t run_script(struct daemon *daemon, char *action, struct dhcp_lease *lease)
{
if (daemon->lease_change_command)
{
char *addr = inet_ntoa(lease->addr);
char *com = strrchr(daemon->lease_change_command, '/');
char *p;
pid_t pid;
int i;
/* stringify MAC into dhcp_buff */
p = daemon->dhcp_buff;
if (lease->hwaddr_type != ARPHRD_ETHER || lease->hwaddr_len == 0)
p += sprintf(p, "%.2x-", lease->hwaddr_type);
for (i = 0; i < lease->hwaddr_len; i++)
{
p += sprintf(p, "%.2x", lease->hwaddr[i]);
if (i != lease->hwaddr_len - 1)
p += sprintf(p, ":");
}
/* and CLID into namebuff */
p = daemon->namebuff;
if (lease->clid)
for (i = 0; i < lease->clid_len; i++)
{
p += sprintf(p, "%.2x", lease->clid[i]);
if (i != lease->clid_len - 1)
p += sprintf(p, ":");
}
/* and expiry or length into dhcp_buff2 */
#ifdef HAVE_BROKEN_RTC
sprintf(daemon->dhcp_buff2, "%u ", lease->length);
#else
sprintf(daemon->dhcp_buff2, "%lu ", (unsigned long)lease->expires);
#endif
pid = fork();
if (pid == -1)
return 0; /* fork error */
else if (pid != 0)
return pid;
if (lease->clid && lease->clid_len != 0)
setenv("DNSMASQ_CLIENT_ID", daemon->namebuff, 1);
else
unsetenv("DNSMASQ_CLIENT_ID");
#ifdef HAVE_BROKEN_RTC
setenv("DNSMASQ_LEASE_LENGTH", daemon->dhcp_buff2, 1);
unsetenv("DNSMASQ_LEASE_EXPIRES");
#else
setenv("DNSMASQ_LEASE_EXPIRES", daemon->dhcp_buff2, 1);
unsetenv("DNSMASQ_LEASE_LENGTH");
#endif
execl(daemon->lease_change_command,
com ? com+1 : daemon->lease_change_command,
action, daemon->dhcp_buff, addr, lease->hostname, (char*)NULL);
/* log socket should still be open, right? */
syslog(LOG_ERR, _("failed to execute %s: %m"),
daemon->lease_change_command);
_exit(0);
}
return 0;
}
#endif
/* deleted leases get transferred to the old_leases list.
remove them here, after calling the lease change
script. Also run the lease change script on new leases */
void lease_collect(struct daemon *daemon)
script. Also run the lease change script on new/modified leases.
Return zero if nothing to do. */
int do_script_run(struct daemon *daemon)
{
struct dhcp_lease *lease;
while (old_leases)
if (old_leases)
{
if (daemon->script_pid != 0)
return; /* busy */
lease = old_leases;
old_leases = lease->next;
#ifndef NO_FORK
daemon->script_pid = run_script(daemon, "del", lease);
#endif
if (lease->hostname)
free(lease->hostname);
if (lease->fqdn)
free(lease->fqdn);
if (lease->clid)
free(lease->clid);
free(lease);
/* If the lease still has an old_hostname, do the "old" action on that first */
if (lease->old_hostname)
{
queue_script(daemon, ACTION_OLD_HOSTNAME, lease, lease->old_hostname);
free(lease->old_hostname);
lease->old_hostname = NULL;
return 1;
}
else
{
queue_script(daemon, ACTION_DEL, lease, lease->hostname);
old_leases = lease->next;
if (lease->hostname)
free(lease->hostname);
if (lease->fqdn)
free(lease->fqdn);
if (lease->clid)
free(lease->clid);
if (lease->vendorclass)
free(lease->vendorclass);
if (lease->userclass)
free(lease->userclass);
free(lease);
return 1;
}
}
/* make sure we announce the loss of a hostname before its new location. */
for (lease = leases; lease; lease = lease->next)
if (lease->old_hostname)
{
queue_script(daemon, ACTION_OLD_HOSTNAME, lease, lease->old_hostname);
free(lease->old_hostname);
lease->old_hostname = NULL;
return 1;
}
for (lease = leases; lease; lease = lease->next)
if (lease->new || lease->changed ||
(lease->aux_changed && (daemon->options & OPT_LEASE_RO)))
{
if (daemon->script_pid != 0)
return; /* busy */
#ifndef NO_FORK
daemon->script_pid = run_script(daemon, lease->new ? "add" : "old", lease);
#endif
queue_script(daemon, lease->new ? ACTION_ADD : ACTION_OLD, lease, lease->hostname);
lease->new = lease->changed = lease->aux_changed = 0;
/* these are used for the "add" call, then junked, since they're not in the database */
if (lease->vendorclass)
{
free(lease->vendorclass);
lease->vendorclass = NULL;
}
if (lease->userclass)
{
free(lease->userclass);
lease->userclass = NULL;
}
return 1;
}
return 0; /* nothing to do */
}