From 433665c9d110d783ea4043c59657f0437fcc31dd Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Mon, 17 Dec 2007 21:50:05 -0800 Subject: [NETFILTER]: ip6_tables: move IP6T_SO_GET_INFO handling to seperate function Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv6/netfilter/ip6_tables.c | 89 ++++++++++++++++++++++------------------- 1 file changed, 47 insertions(+), 42 deletions(-) (limited to 'net') diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c index 02be4fcb915..681316e40c6 100644 --- a/net/ipv6/netfilter/ip6_tables.c +++ b/net/ipv6/netfilter/ip6_tables.c @@ -1037,6 +1037,50 @@ copy_entries_to_user(unsigned int total_size, return ret; } +static int get_info(void __user *user, int *len) +{ + char name[IP6T_TABLE_MAXNAMELEN]; + struct xt_table *t; + int ret; + + if (*len != sizeof(struct ip6t_getinfo)) { + duprintf("length %u != %u\n", *len, + sizeof(struct ip6t_getinfo)); + return -EINVAL; + } + + if (copy_from_user(name, user, sizeof(name)) != 0) + return -EFAULT; + + name[IP6T_TABLE_MAXNAMELEN-1] = '\0'; + + t = try_then_request_module(xt_find_table_lock(AF_INET6, name), + "ip6table_%s", name); + if (t && !IS_ERR(t)) { + struct ip6t_getinfo info; + struct xt_table_info *private = t->private; + + info.valid_hooks = t->valid_hooks; + memcpy(info.hook_entry, private->hook_entry, + sizeof(info.hook_entry)); + memcpy(info.underflow, private->underflow, + sizeof(info.underflow)); + info.num_entries = private->number; + info.size = private->size; + memcpy(info.name, name, sizeof(info.name)); + + if (copy_to_user(user, &info, *len) != 0) + ret = -EFAULT; + else + ret = 0; + + xt_table_unlock(t); + module_put(t->me); + } else + ret = t ? PTR_ERR(t) : -ENOENT; + return ret; +} + static int get_entries(const struct ip6t_get_entries *entries, struct ip6t_get_entries __user *uptr) @@ -1274,48 +1318,9 @@ do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) return -EPERM; switch (cmd) { - case IP6T_SO_GET_INFO: { - char name[IP6T_TABLE_MAXNAMELEN]; - struct xt_table *t; - - if (*len != sizeof(struct ip6t_getinfo)) { - duprintf("length %u != %u\n", *len, - sizeof(struct ip6t_getinfo)); - ret = -EINVAL; - break; - } - - if (copy_from_user(name, user, sizeof(name)) != 0) { - ret = -EFAULT; - break; - } - name[IP6T_TABLE_MAXNAMELEN-1] = '\0'; - - t = try_then_request_module(xt_find_table_lock(AF_INET6, name), - "ip6table_%s", name); - if (t && !IS_ERR(t)) { - struct ip6t_getinfo info; - struct xt_table_info *private = t->private; - - info.valid_hooks = t->valid_hooks; - memcpy(info.hook_entry, private->hook_entry, - sizeof(info.hook_entry)); - memcpy(info.underflow, private->underflow, - sizeof(info.underflow)); - info.num_entries = private->number; - info.size = private->size; - memcpy(info.name, name, sizeof(info.name)); - - if (copy_to_user(user, &info, *len) != 0) - ret = -EFAULT; - else - ret = 0; - xt_table_unlock(t); - module_put(t->me); - } else - ret = t ? PTR_ERR(t) : -ENOENT; - } - break; + case IP6T_SO_GET_INFO: + ret = get_info(user, len); + break; case IP6T_SO_GET_ENTRIES: { struct ip6t_get_entries get; -- cgit v1.2.3