static int owner_mt_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_owner_match_info *info = (void *)(*match)->data;
struct passwd *pwd;
struct group *grp;
unsigned int from, to;
switch (c) {
case 'u':
xtables_param_act(XTF_ONLY_ONCE, "owner", "--uid-owner",
*flags & FLAG_UID_OWNER);
if ((pwd = getpwnam(optarg)) != NULL)
from = to = pwd->pw_uid;
else
owner_parse_range(optarg, &from, &to, "--uid-owner");
if (invert)
info->invert |= XT_OWNER_UID;
info->match |= XT_OWNER_UID;
info->uid_min = from;
info->uid_max = to;
*flags |= FLAG_UID_OWNER;
return true;
case 'g':
xtables_param_act(XTF_ONLY_ONCE, "owner", "--gid-owner",
*flags & FLAG_GID_OWNER);
if ((grp = getgrnam(optarg)) != NULL)
from = to = grp->gr_gid;
else
owner_parse_range(optarg, &from, &to, "--gid-owner");
if (invert)
info->invert |= XT_OWNER_GID;
info->match |= XT_OWNER_GID;
info->gid_min = from;
info->gid_max = to;
*flags |= FLAG_GID_OWNER;
return true;
case 'k':
xtables_param_act(XTF_ONLY_ONCE, "owner", "--socket-exists",
*flags & FLAG_SOCKET_EXISTS);
if (invert)
info->invert |= XT_OWNER_SOCKET;
info->match |= XT_OWNER_SOCKET;
*flags |= FLAG_SOCKET_EXISTS;
return true;
}
return false;
}
static void owner_mt_parse(struct xt_option_call *cb)
{
struct xt_owner_match_info *info = cb->data;
struct passwd *pwd;
struct group *grp;
unsigned int from, to;
xtables_option_parse(cb);
switch (cb->entry->id) {
case O_USER:
if ((pwd = getpwnam(cb->arg)) != NULL)
from = to = pwd->pw_uid;
else
owner_parse_range(cb->arg, &from, &to, "--uid-owner");
if (cb->invert)
info->invert |= XT_OWNER_UID;
info->match |= XT_OWNER_UID;
info->uid_min = from;
info->uid_max = to;
break;
case O_GROUP:
if ((grp = getgrnam(cb->arg)) != NULL)
from = to = grp->gr_gid;
else
owner_parse_range(cb->arg, &from, &to, "--gid-owner");
if (cb->invert)
info->invert |= XT_OWNER_GID;
info->match |= XT_OWNER_GID;
info->gid_min = from;
info->gid_max = to;
break;
case O_SOCK_EXISTS:
if (cb->invert)
info->invert |= XT_OWNER_SOCKET;
info->match |= XT_OWNER_SOCKET;
break;
}
}
