--- ./include/linux/netfilter/x_tables.h.iptcompat 2006-02-15 16:16:02.000000000 +0300 +++ ./include/linux/netfilter/x_tables.h 2006-02-15 18:53:09.000000000 +0300 @@ -80,12 +80,19 @@ struct xt_counters_info #ifdef __KERNEL__ +#include #include #define ASSERT_READ_LOCK(x) #define ASSERT_WRITE_LOCK(x) #include +#ifdef CONFIG_COMPAT +#define COMPAT_TO_USER 1 +#define COMPAT_FROM_USER -1 +#define COMPAT_CALC_SIZE 0 +#endif + struct xt_match { struct list_head list; @@ -118,6 +125,10 @@ struct xt_match /* Called when entry of this type deleted. */ void (*destroy)(void *matchinfo, unsigned int matchinfosize); +#ifdef CONFIG_COMPAT + /* Called when userspace align differs from kernel space one */ + int (*compat)(void *match, void **dstptr, int *size, int convert); +#endif /* Set this to THIS_MODULE if you are a module, otherwise NULL */ struct module *me; }; @@ -154,6 +165,10 @@ struct xt_target /* Called when entry of this type deleted. */ void (*destroy)(void *targinfo, unsigned int targinfosize); +#ifdef CONFIG_COMPAT + /* Called when userspace align differs from kernel space one */ + int (*compat)(void *target, void **dstptr, int *size, int convert); +#endif /* Set this to THIS_MODULE if you are a module, otherwise NULL */ struct module *me; }; @@ -233,6 +248,34 @@ extern void xt_proto_fini(int af); extern struct xt_table_info *xt_alloc_table_info(unsigned int size); extern void xt_free_table_info(struct xt_table_info *info); +#ifdef CONFIG_COMPAT +#include + +/* FIXME: this works only on 32 bit tasks + * need to change whole approach in order to calculate align as function of + * current task alignment */ + +struct compat_xt_counters +{ + u_int32_t cnt[4]; +}; + +struct compat_xt_counters_info +{ + char name[XT_TABLE_MAXNAMELEN]; + compat_uint_t num_counters; + struct compat_xt_counters counters[0]; +}; + +#define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \ + & ~(__alignof__(struct compat_xt_counters)-1)) + +extern int ipt_match_align_compat(void *match, void **dstptr, + int *size, int off, int convert); +extern int ipt_target_align_compat(void *target, void **dstptr, + int *size, int off, int convert); + +#endif /* CONFIG_COMPAT */ #endif /* __KERNEL__ */ #endif /* _X_TABLES_H */ --- ./include/linux/netfilter_ipv4/ip_tables.h.iptcompat 2006-02-15 16:06:41.000000000 +0300 +++ ./include/linux/netfilter_ipv4/ip_tables.h 2006-02-15 16:37:12.000000000 +0300 @@ -16,6 +16,7 @@ #define _IPTABLES_H #ifdef __KERNEL__ +#include #include #include #include @@ -364,5 +365,62 @@ extern unsigned int ipt_do_table(struct void *userdata); #define IPT_ALIGN(s) XT_ALIGN(s) + +#ifdef CONFIG_COMPAT +#include + +struct compat_ipt_getinfo +{ + char name[IPT_TABLE_MAXNAMELEN]; + compat_uint_t valid_hooks; + compat_uint_t hook_entry[NF_IP_NUMHOOKS]; + compat_uint_t underflow[NF_IP_NUMHOOKS]; + compat_uint_t num_entries; + compat_uint_t size; +}; + +struct compat_ipt_entry +{ + struct ipt_ip ip; + compat_uint_t nfcache; + u_int16_t target_offset; + u_int16_t next_offset; + compat_uint_t comefrom; + struct compat_xt_counters counters; + unsigned char elems[0]; +}; + +struct compat_ipt_entry_match +{ + union { + struct { + u_int16_t match_size; + char name[IPT_FUNCTION_MAXNAMELEN]; + } user; + u_int16_t match_size; + } u; + unsigned char data[0]; +}; + +struct compat_ipt_entry_target +{ + union { + struct { + u_int16_t target_size; + char name[IPT_FUNCTION_MAXNAMELEN]; + } user; + u_int16_t target_size; + } u; + unsigned char data[0]; +}; + +#define COMPAT_IPT_ALIGN(s) COMPAT_XT_ALIGN(s) + +extern int ipt_match_align_compat(void *match, void **dstptr, + int *size, int off, int convert); +extern int ipt_target_align_compat(void *target, void **dstptr, + int *size, int off, int convert); + +#endif /* CONFIG_COMPAT */ #endif /*__KERNEL__*/ #endif /* _IPTABLES_H */ --- ./include/net/compat.h.iptcompat 2006-01-03 06:21:10.000000000 +0300 +++ ./include/net/compat.h 2006-02-15 18:45:49.000000000 +0300 @@ -23,6 +23,14 @@ struct compat_cmsghdr { compat_int_t cmsg_type; }; +#if defined(CONFIG_X86_64) +#define is_current_32bits() (current_thread_info()->flags & _TIF_IA32) +#elif defined(CONFIG_IA64) +#define is_current_32bits() (IS_IA32_PROCESS(ia64_task_regs(current))) +#else +#define is_current_32bits() 0 +#endif + #else /* defined(CONFIG_COMPAT) */ #define compat_msghdr msghdr /* to avoid compiler warnings */ #endif /* defined(CONFIG_COMPAT) */ --- ./net/compat.c.iptcompat 2006-01-03 06:21:10.000000000 +0300 +++ ./net/compat.c 2006-02-15 16:38:45.000000000 +0300 @@ -308,107 +308,6 @@ void scm_detach_fds_compat(struct msghdr } /* - * For now, we assume that the compatibility and native version - * of struct ipt_entry are the same - sfr. FIXME - */ -struct compat_ipt_replace { - char name[IPT_TABLE_MAXNAMELEN]; - u32 valid_hooks; - u32 num_entries; - u32 size; - u32 hook_entry[NF_IP_NUMHOOKS]; - u32 underflow[NF_IP_NUMHOOKS]; - u32 num_counters; - compat_uptr_t counters; /* struct ipt_counters * */ - struct ipt_entry entries[0]; -}; - -static int do_netfilter_replace(int fd, int level, int optname, - char __user *optval, int optlen) -{ - struct compat_ipt_replace __user *urepl; - struct ipt_replace __user *repl_nat; - char name[IPT_TABLE_MAXNAMELEN]; - u32 origsize, tmp32, num_counters; - unsigned int repl_nat_size; - int ret; - int i; - compat_uptr_t ucntrs; - - urepl = (struct compat_ipt_replace __user *)optval; - if (get_user(origsize, &urepl->size)) - return -EFAULT; - - /* Hack: Causes ipchains to give correct error msg --RR */ - if (optlen != sizeof(*urepl) + origsize) - return -ENOPROTOOPT; - - /* XXX Assumes that size of ipt_entry is the same both in - * native and compat environments. - */ - repl_nat_size = sizeof(*repl_nat) + origsize; - repl_nat = compat_alloc_user_space(repl_nat_size); - - ret = -EFAULT; - if (put_user(origsize, &repl_nat->size)) - goto out; - - if (!access_ok(VERIFY_READ, urepl, optlen) || - !access_ok(VERIFY_WRITE, repl_nat, optlen)) - goto out; - - if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) || - __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name))) - goto out; - - if (__get_user(tmp32, &urepl->valid_hooks) || - __put_user(tmp32, &repl_nat->valid_hooks)) - goto out; - - if (__get_user(tmp32, &urepl->num_entries) || - __put_user(tmp32, &repl_nat->num_entries)) - goto out; - - if (__get_user(num_counters, &urepl->num_counters) || - __put_user(num_counters, &repl_nat->num_counters)) - goto out; - - if (__get_user(ucntrs, &urepl->counters) || - __put_user(compat_ptr(ucntrs), &repl_nat->counters)) - goto out; - - if (__copy_in_user(&repl_nat->entries[0], - &urepl->entries[0], - origsize)) - goto out; - - for (i = 0; i < NF_IP_NUMHOOKS; i++) { - if (__get_user(tmp32, &urepl->hook_entry[i]) || - __put_user(tmp32, &repl_nat->hook_entry[i]) || - __get_user(tmp32, &urepl->underflow[i]) || - __put_user(tmp32, &repl_nat->underflow[i])) - goto out; - } - - /* - * Since struct ipt_counters just contains two u_int64_t members - * we can just do the access_ok check here and pass the (converted) - * pointer into the standard syscall. We hope that the pointer is - * not misaligned ... - */ - if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs), - num_counters * sizeof(struct ipt_counters))) - goto out; - - - ret = sys_setsockopt(fd, level, optname, - (char __user *)repl_nat, repl_nat_size); - -out: - return ret; -} - -/* * A struct sock_filter is architecture independent. */ struct compat_sock_fprog { @@ -460,10 +359,6 @@ static int do_set_sock_timeout(int fd, i asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, char __user *optval, int optlen) { - /* SO_SET_REPLACE seems to be the same in all levels */ - if (optname == IPT_SO_SET_REPLACE) - return do_netfilter_replace(fd, level, optname, - optval, optlen); if (level == SOL_SOCKET && optname == SO_ATTACH_FILTER) return do_set_attach_filter(fd, level, optname, optval, optlen); --- ./net/ipv4/netfilter/ip_tables.c.iptcompat 2006-02-15 16:06:42.000000000 +0300 +++ ./net/ipv4/netfilter/ip_tables.c 2006-02-17 19:38:05.000000000 +0300 @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -480,7 +481,7 @@ standard_check(const struct ipt_entry_ta if (t->u.target_size != IPT_ALIGN(sizeof(struct ipt_standard_target))) { duprintf("standard_check: target size %u != %u\n", - t->u.target_size, + t->u.target_size, (unsigned int) IPT_ALIGN(sizeof(struct ipt_standard_target))); return 0; } @@ -790,17 +791,11 @@ get_counters(const struct xt_table_info } } -static int -copy_entries_to_user(unsigned int total_size, - struct ipt_table *table, - void __user *userptr) +static inline struct xt_counters * alloc_counters(struct ipt_table *table) { - unsigned int off, num, countersize; - struct ipt_entry *e; + unsigned int countersize; struct xt_counters *counters; struct xt_table_info *private = table->private; - int ret = 0; - void *loc_cpu_entry; /* We need atomic snapshot of counters: rest doesn't change (other than comefrom, which userspace doesn't care @@ -809,13 +804,32 @@ copy_entries_to_user(unsigned int total_ counters = vmalloc_node(countersize, numa_node_id()); if (counters == NULL) - return -ENOMEM; + return ERR_PTR(-ENOMEM); /* First, sum counters... */ write_lock_bh(&table->lock); get_counters(private, counters); write_unlock_bh(&table->lock); + return counters; +} + +static int +copy_entries_to_user(unsigned int total_size, + struct ipt_table *table, + void __user *userptr) +{ + unsigned int off, num; + struct ipt_entry *e; + struct xt_counters *counters; + struct xt_table_info *private = table->private; + int ret = 0; + void *loc_cpu_entry; + + counters = alloc_counters(table); + if (IS_ERR(counters)) + return PTR_ERR(counters); + /* choose the copy that is on our node/cpu, ... * This choice is lazy (because current thread is * allowed to migrate to another cpu) @@ -875,25 +889,391 @@ copy_entries_to_user(unsigned int total_ return ret; } +#ifdef CONFIG_COMPAT +static DECLARE_MUTEX(compat_ipt_mutex); + +struct compat_delta { + struct compat_delta *next; + u_int16_t offset; + short delta; +}; + +static struct compat_delta *compat_offsets = NULL; + +static int compat_add_offset(u_int16_t offset, short delta) +{ + struct compat_delta *tmp; + + tmp = kmalloc(sizeof(struct compat_delta), GFP_KERNEL); + if (!tmp) + return -ENOMEM; + tmp->offset = offset; + tmp->delta = delta; + if (compat_offsets) { + tmp->next = compat_offsets->next; + compat_offsets->next = tmp; + } else { + compat_offsets = tmp; + tmp->next = NULL; + } + return 0; +} + +static void compat_flush_offsets(void) +{ + struct compat_delta *tmp, *next; + + if (compat_offsets) { + for(tmp = compat_offsets; tmp; tmp = next) { + next = tmp->next; + kfree(tmp); + } + compat_offsets = NULL; + } +} + +static short compat_calc_jump(u_int16_t offset) +{ + struct compat_delta *tmp; + short delta; + + for(tmp = compat_offsets, delta = 0; tmp; tmp = tmp->next) + if (tmp->offset < offset) + delta += tmp->delta; + return delta; +} + +struct compat_ipt_standard_target +{ + struct compat_ipt_entry_target target; + compat_int_t verdict; +}; + +#define IPT_ST_OFFSET (sizeof(struct ipt_standard_target) - \ + sizeof(struct compat_ipt_standard_target)) + +struct compat_ipt_standard +{ + struct compat_ipt_entry entry; + struct compat_ipt_standard_target target; +}; + +static int compat_ipt_standard_fn(void *target, + void **dstptr, int *size, int convert) +{ + struct compat_ipt_standard_target compat_st, *pcompat_st; + struct ipt_standard_target st, *pst; + int ret; + + ret = 0; + switch (convert) { + case COMPAT_TO_USER: + pst = (struct ipt_standard_target *)target; + memcpy(&compat_st.target, &pst->target, + sizeof(struct ipt_entry_target)); + compat_st.verdict = pst->verdict; + if (compat_st.verdict > 0) + compat_st.verdict -= + compat_calc_jump(compat_st.verdict); + compat_st.target.u.user.target_size = + sizeof(struct compat_ipt_standard_target); + if (__copy_to_user(*dstptr, &compat_st, + sizeof(struct compat_ipt_standard_target))) + ret = -EFAULT; + *size -= IPT_ST_OFFSET; + *dstptr += sizeof(struct compat_ipt_standard_target); + break; + case COMPAT_FROM_USER: + pcompat_st = + (struct compat_ipt_standard_target *)target; + memcpy(&st.target, &pcompat_st->target, + sizeof(struct ipt_entry_target)); + st.verdict = pcompat_st->verdict; + if (st.verdict > 0) + st.verdict += compat_calc_jump(st.verdict); + st.target.u.user.target_size = + sizeof(struct ipt_standard_target); + memcpy(*dstptr, &st, + sizeof(struct ipt_standard_target)); + *size += IPT_ST_OFFSET; + *dstptr += sizeof(struct ipt_standard_target); + break; + case COMPAT_CALC_SIZE: + *size += IPT_ST_OFFSET; + break; + default: + ret = -ENOPROTOOPT; + break; + } + return ret; +} + +int ipt_target_align_compat(void *target, void **dstptr, + int *size, int off, int convert) +{ + struct compat_ipt_entry_target *pcompat; + struct ipt_entry_target *pt; + u_int16_t tsize; + int ret; + + ret = 0; + switch (convert) { + case COMPAT_TO_USER: + pt = (struct ipt_entry_target *)target; + tsize = pt->u.user.target_size; + if (__copy_to_user(*dstptr, pt, tsize)) { + ret = -EFAULT; + break; + } + tsize -= off; + if (put_user(tsize, (u_int16_t *)*dstptr)) + ret = -EFAULT; + *size -= off; + *dstptr += tsize; + break; + case COMPAT_FROM_USER: + pcompat = (struct compat_ipt_entry_target *)target; + pt = (struct ipt_entry_target *)*dstptr; + tsize = pcompat->u.user.target_size; + memcpy(pt, pcompat, tsize); + tsize += off; + pt->u.user.target_size = tsize; + *size += off; + *dstptr += tsize; + break; + case COMPAT_CALC_SIZE: + *size += off; + break; + default: + ret = -ENOPROTOOPT; + break; + } + return ret; +} + +int ipt_match_align_compat(void *match, void **dstptr, + int *size, int off, int convert) +{ + struct compat_ipt_entry_match *pcompat_m; + struct ipt_entry_match *pm; + u_int16_t msize; + int ret; + + ret = 0; + switch (convert) { + case COMPAT_TO_USER: + pm = (struct ipt_entry_match *)match; + msize = pm->u.user.match_size; + if (__copy_to_user(*dstptr, pm, msize)) { + ret = -EFAULT; + break; + } + msize -= off; + if (put_user(msize, (u_int16_t *)*dstptr)) + ret = -EFAULT; + *size -= off; + *dstptr += msize; + break; + case COMPAT_FROM_USER: + pcompat_m = (struct compat_ipt_entry_match *)match; + pm = (struct ipt_entry_match *)*dstptr; + msize = pcompat_m->u.user.match_size; + memcpy(pm, pcompat_m, msize); + msize += off; + pm->u.user.match_size = msize; + *size += off; + *dstptr += msize; + break; + case COMPAT_CALC_SIZE: + *size += off; + break; + default: + ret = -ENOPROTOOPT; + break; + } + return ret; +} + +static int icmp_compat(void *match, + void **dstptr, int *size, int convert) +{ + int off; + + off = IPT_ALIGN(sizeof(struct ipt_icmp)) - + COMPAT_IPT_ALIGN(sizeof(struct ipt_icmp)); + return ipt_match_align_compat(match, dstptr, size, off, convert); +} + +static inline int +compat_calc_match(struct ipt_entry_match *m, int * size) +{ + if (m->u.kernel.match->compat) + m->u.kernel.match->compat(m, NULL, size, COMPAT_CALC_SIZE); + return 0; +} + +static int compat_calc_entry(struct ipt_entry *e, struct xt_table_info *info, + void *base, struct xt_table_info *newinfo) +{ + struct ipt_entry_target *t; + u_int16_t entry_offset; + int off, i, ret; + + off = 0; + entry_offset = (void *)e - base; + IPT_MATCH_ITERATE(e, compat_calc_match, &off); + t = ipt_get_target(e); + if (t->u.kernel.target->compat) + t->u.kernel.target->compat(t, NULL, &off, COMPAT_CALC_SIZE); + newinfo->size -= off; + ret = compat_add_offset(entry_offset, off); + if (ret) + return ret; + + for (i = 0; i< NF_IP_NUMHOOKS; i++) { + if (info->hook_entry[i] && (e < (struct ipt_entry *) + (base + info->hook_entry[i]))) + newinfo->hook_entry[i] -= off; + if (info->underflow[i] && (e < (struct ipt_entry *) + (base + info->underflow[i]))) + newinfo->underflow[i] -= off; + } + return 0; +} + +static int compat_table_info(struct xt_table_info *info, + struct xt_table_info *newinfo) +{ + void *loc_cpu_entry; + int i; + + if (!newinfo || !info) + return -EINVAL; + + memset(newinfo, 0, sizeof(struct xt_table_info)); + newinfo->size = info->size; + for (i = 0; i < NF_IP_NUMHOOKS; i++) { + newinfo->hook_entry[i] = info->hook_entry[i]; + newinfo->underflow[i] = info->underflow[i]; + } + loc_cpu_entry = info->entries[raw_smp_processor_id()]; + return IPT_ENTRY_ITERATE(loc_cpu_entry, info->size, + compat_calc_entry, info, loc_cpu_entry, newinfo); +} +#endif + +static int get_info(void __user *user, int *len) +{ + char name[IPT_TABLE_MAXNAMELEN]; + struct ipt_table *t; + int ret, size; + +#ifdef CONFIG_COMPAT + if (is_current_32bits()) + size = sizeof(struct compat_ipt_getinfo); + else +#endif + size = sizeof(struct ipt_getinfo); + + if (*len != size) { + duprintf("length %u != %u\n", *len, + (unsigned int)sizeof(struct ipt_getinfo)); + return -EINVAL; + } + + if (copy_from_user(name, user, sizeof(name)) != 0) + return -EFAULT; + + name[IPT_TABLE_MAXNAMELEN-1] = '\0'; +#ifdef CONFIG_COMPAT + down(&compat_ipt_mutex); +#endif + t = try_then_request_module(xt_find_table_lock(AF_INET, name), + "iptable_%s", name); + if (t && !IS_ERR(t)) { + struct ipt_getinfo info; + struct xt_table_info *private = t->private; +#ifdef CONFIG_COMPAT + struct compat_ipt_getinfo compat_info; +#endif + void *pinfo; + +#ifdef CONFIG_COMPAT + if (is_current_32bits()) { + struct xt_table_info tmp; + ret = compat_table_info(private, &tmp); + compat_flush_offsets(); + memcpy(compat_info.hook_entry, tmp.hook_entry, + sizeof(compat_info.hook_entry)); + memcpy(compat_info.underflow, tmp.underflow, + sizeof(compat_info.underflow)); + compat_info.valid_hooks = t->valid_hooks; + compat_info.num_entries = private->number; + compat_info.size = tmp.size; + strcpy(compat_info.name, name); + pinfo = (void *)&compat_info; + } else +#endif + { + 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; + strcpy(info.name, name); + pinfo = (void *)&info; + } + + if (copy_to_user(user, pinfo, *len) != 0) + ret = -EFAULT; + else + ret = 0; + + xt_table_unlock(t); + module_put(t->me); + } else + ret = t ? PTR_ERR(t) : -ENOENT; +#ifdef CONFIG_COMPAT + up(&compat_ipt_mutex); +#endif + return ret; +} + static int -get_entries(const struct ipt_get_entries *entries, - struct ipt_get_entries __user *uptr) +get_entries(struct ipt_get_entries __user *uptr, int *len) { int ret; + struct ipt_get_entries get; struct ipt_table *t; - t = xt_find_table_lock(AF_INET, entries->name); + if (*len < sizeof(get)) { + duprintf("get_entries: %u < %d\n", *len, + (unsigned int)sizeof(get)); + return -EINVAL; + } + if (copy_from_user(&get, uptr, sizeof(get)) != 0) + return -EFAULT; + if (*len != sizeof(struct ipt_get_entries) + get.size) { + duprintf("get_entries: %u != %u\n", *len, + (unsigned int)(sizeof(struct ipt_get_entries) + + get.size)); + return -EINVAL; + } + + t = xt_find_table_lock(AF_INET, get.name); if (t && !IS_ERR(t)) { struct xt_table_info *private = t->private; duprintf("t->private->number = %u\n", private->number); - if (entries->size == private->size) + if (get.size == private->size) ret = copy_entries_to_user(private->size, t, uptr->entrytable); else { duprintf("get_entries: I've got %u not %u!\n", private->size, - entries->size); + get.size); ret = -EINVAL; } module_put(t->me); @@ -905,71 +1285,39 @@ get_entries(const struct ipt_get_entries } static int -do_replace(void __user *user, unsigned int len) +__do_replace(const char *name, unsigned int valid_hooks, + struct xt_table_info *newinfo, unsigned int num_counters, + void __user *counters_ptr) { int ret; - struct ipt_replace tmp; struct ipt_table *t; - struct xt_table_info *newinfo, *oldinfo; + struct xt_table_info *oldinfo; struct xt_counters *counters; - void *loc_cpu_entry, *loc_cpu_old_entry; - - if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) - return -EFAULT; - - /* Hack: Causes ipchains to give correct error msg --RR */ - if (len != sizeof(tmp) + tmp.size) - return -ENOPROTOOPT; - - /* overflow check */ - if (tmp.size >= (INT_MAX - sizeof(struct xt_table_info)) / NR_CPUS - - SMP_CACHE_BYTES) - return -ENOMEM; - if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters)) - return -ENOMEM; - - newinfo = xt_alloc_table_info(tmp.size); - if (!newinfo) - return -ENOMEM; - - /* choose the copy that is our node/cpu */ - loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; - if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), - tmp.size) != 0) { - ret = -EFAULT; - goto free_newinfo; - } + void *loc_cpu_old_entry; - counters = vmalloc(tmp.num_counters * sizeof(struct xt_counters)); + ret = 0; + counters = vmalloc(num_counters * sizeof(struct xt_counters)); if (!counters) { ret = -ENOMEM; - goto free_newinfo; + goto out; } - ret = translate_table(tmp.name, tmp.valid_hooks, - newinfo, loc_cpu_entry, tmp.size, tmp.num_entries, - tmp.hook_entry, tmp.underflow); - if (ret != 0) - goto free_newinfo_counters; - - duprintf("ip_tables: Translated table\n"); - - t = try_then_request_module(xt_find_table_lock(AF_INET, tmp.name), - "iptable_%s", tmp.name); + t = try_then_request_module(xt_find_table_lock(AF_INET, name), + "iptable_%s", name); if (!t || IS_ERR(t)) { ret = t ? PTR_ERR(t) : -ENOENT; goto free_newinfo_counters_untrans; } /* You lied! */ - if (tmp.valid_hooks != t->valid_hooks) { + if (valid_hooks != t->valid_hooks) { duprintf("Valid hook crap: %08X vs %08X\n", - tmp.valid_hooks, t->valid_hooks); + valid_hooks, t->valid_hooks); ret = -EINVAL; goto put_module; } - oldinfo = xt_replace_table(t, tmp.num_counters, newinfo, &ret); + oldinfo = xt_replace_table(t, num_counters, newinfo, &ret); if (!oldinfo) goto put_module; @@ -989,8 +1337,8 @@ do_replace(void __user *user, unsigned i loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()]; IPT_ENTRY_ITERATE(loc_cpu_old_entry, oldinfo->size, cleanup_entry,NULL); xt_free_table_info(oldinfo); - if (copy_to_user(tmp.counters, counters, - sizeof(struct xt_counters) * tmp.num_counters) != 0) + if (copy_to_user(counters_ptr, counters, + sizeof(struct xt_counters) * num_counters) != 0) ret = -EFAULT; vfree(counters); xt_table_unlock(t); @@ -1000,9 +1348,62 @@ do_replace(void __user *user, unsigned i module_put(t->me); xt_table_unlock(t); free_newinfo_counters_untrans: - IPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry,NULL); - free_newinfo_counters: vfree(counters); + out: + return ret; +} + +static int +do_replace(void __user *user, unsigned int len) +{ + int ret; + struct ipt_replace tmp; + struct xt_table_info *newinfo; + void *loc_cpu_entry; + + if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) + return -EFAULT; + + /* Hack: Causes ipchains to give correct error msg --RR */ + if (len != sizeof(tmp) + tmp.size) + return -ENOPROTOOPT; + + /* overflow check */ + if (tmp.size >= (INT_MAX - sizeof(struct xt_table_info)) / NR_CPUS - + SMP_CACHE_BYTES) + return -ENOMEM; + if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters)) + return -ENOMEM; + + newinfo = xt_alloc_table_info(tmp.size); + if (!newinfo) + return -ENOMEM; + + /* choose the copy that is our node/cpu */ + loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; + if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), + tmp.size) != 0) { + ret = -EFAULT; + goto free_newinfo; + } + + ret = translate_table(tmp.name, tmp.valid_hooks, + newinfo, loc_cpu_entry, tmp.size, tmp.num_entries, + tmp.hook_entry, tmp.underflow); + if (ret != 0) + goto free_newinfo; + + duprintf("ip_tables: Translated table\n"); + + ret = __do_replace(tmp.name, tmp.valid_hooks, + newinfo, tmp.num_counters, + tmp.counters); + if (ret) + goto free_newinfo_untrans; + return 0; + + free_newinfo_untrans: + IPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry,NULL); free_newinfo: xt_free_table_info(newinfo); return ret; @@ -1034,28 +1435,56 @@ static int do_add_counters(void __user *user, unsigned int len) { unsigned int i; - struct xt_counters_info tmp, *paddc; + struct xt_counters_info tmp; + struct xt_counters *paddc; + unsigned int num_counters; + char *name; + int size; + void *ptmp; struct ipt_table *t; struct xt_table_info *private; int ret = 0; void *loc_cpu_entry; +#ifdef CONFIG_COMPAT + struct compat_xt_counters_info compat_tmp; - if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) + if (is_current_32bits()) { + ptmp = &compat_tmp; + size = sizeof(struct compat_xt_counters_info); + } else +#endif + { + ptmp = &tmp; + size = sizeof(struct xt_counters_info); + } + + if (copy_from_user(ptmp, user, size) != 0) return -EFAULT; - if (len != sizeof(tmp) + tmp.num_counters*sizeof(struct xt_counters)) +#ifdef CONFIG_COMPAT + if (is_current_32bits()) { + num_counters = compat_tmp.num_counters; + name = compat_tmp.name; + } else +#endif + { + num_counters = tmp.num_counters; + name = tmp.name; + } + + if (len != size + num_counters * sizeof(struct xt_counters)) return -EINVAL; - paddc = vmalloc_node(len, numa_node_id()); + paddc = vmalloc_node(len - size, numa_node_id()); if (!paddc) return -ENOMEM; - if (copy_from_user(paddc, user, len) != 0) { + if (copy_from_user(paddc, user + size, len - size) != 0) { ret = -EFAULT; goto free; } - t = xt_find_table_lock(AF_INET, tmp.name); + t = xt_find_table_lock(AF_INET, name); if (!t || IS_ERR(t)) { ret = t ? PTR_ERR(t) : -ENOENT; goto free; @@ -1063,7 +1492,7 @@ do_add_counters(void __user *user, unsig write_lock_bh(&t->lock); private = t->private; - if (private->number != paddc->num_counters) { + if (private->number != num_counters) { ret = -EINVAL; goto unlock_up_free; } @@ -1074,7 +1503,7 @@ do_add_counters(void __user *user, unsig IPT_ENTRY_ITERATE(loc_cpu_entry, private->size, add_counter_to_entry, - paddc->counters, + paddc, &i); unlock_up_free: write_unlock_bh(&t->lock); @@ -1086,6 +1515,577 @@ do_add_counters(void __user *user, unsig return ret; } +#ifdef CONFIG_COMPAT +struct compat_ipt_replace { + char name[IPT_TABLE_MAXNAMELEN]; + u32 valid_hooks; + u32 num_entries; + u32 size; + u32 hook_entry[NF_IP_NUMHOOKS]; + u32 underflow[NF_IP_NUMHOOKS]; + u32 num_counters; + compat_uptr_t counters; /* struct ipt_counters * */ + struct compat_ipt_entry entries[0]; +}; + +static inline int compat_copy_match_to_user(struct ipt_entry_match *m, + void __user **dstptr, compat_uint_t *size) +{ + if (m->u.kernel.match->compat) + m->u.kernel.match->compat(m, dstptr, size, COMPAT_TO_USER); + else { + if (__copy_to_user(*dstptr, m, m->u.match_size)) + return -EFAULT; + *dstptr += m->u.match_size; + } + return 0; +} + +static int compat_copy_entry_to_user(struct ipt_entry *e, + void __user **dstptr, compat_uint_t *size) +{ + struct ipt_entry_target __user *t; + struct compat_ipt_entry __user *ce; + u_int16_t target_offset, next_offset; + compat_uint_t origsize; + int ret; + + ret = -EFAULT; + origsize = *size; + ce = (struct compat_ipt_entry __user *)*dstptr; + if (__copy_to_user(ce, e, sizeof(struct ipt_entry))) + goto out; + + *dstptr += sizeof(struct compat_ipt_entry); + ret = IPT_MATCH_ITERATE(e, compat_copy_match_to_user, dstptr, size); + target_offset = e->target_offset - (origsize - *size); + if (ret) + goto out; + t = ipt_get_target(e); + if (t->u.kernel.target->compat) { + ret = t->u.kernel.target->compat(t, + dstptr, size, COMPAT_TO_USER); + if (ret) + goto out; + } else { + ret = -EFAULT; + if (__copy_to_user(*dstptr, t, t->u.target_size)) + goto out; + *dstptr += t->u.target_size; + } + ret = -EFAULT; + next_offset = e->next_offset - (origsize - *size); + if (__put_user(target_offset, &ce->target_offset)) + goto out; + if (__put_user(next_offset, &ce->next_offset)) + goto out; + return 0; +out: + return ret; +} + +static inline int +compat_check_calc_match(struct ipt_entry_match *m, + const char *name, + const struct ipt_ip *ip, + unsigned int hookmask, + int *size, int *i) +{ + struct ipt_match *match; + + match = try_then_request_module(xt_find_match(AF_INET, m->u.user.name, + m->u.user.revision), + "ipt_%s", m->u.user.name); + if (IS_ERR(match) || !match) { + duprintf("compat_check_calc_match: `%s' not found\n", + m->u.user.name); + return match ? PTR_ERR(match) : -ENOENT; + } + m->u.kernel.match = match; + + if (m->u.kernel.match->compat) + m->u.kernel.match->compat(m, NULL, size, COMPAT_CALC_SIZE); + + (*i)++; + return 0; +} + +static inline int +check_compat_entry_size_and_hooks(struct ipt_entry *e, + struct xt_table_info *newinfo, + unsigned int *size, + unsigned char *base, + unsigned char *limit, + unsigned int *hook_entries, + unsigned int *underflows, + unsigned int *i, + const char *name) +{ + struct ipt_entry_target *t; + struct ipt_target *target; + u_int16_t entry_offset; + int ret, off, h, j; + + duprintf("check_compat_entry_size_and_hooks %p\n", e); + if ((unsigned long)e % __alignof__(struct compat_ipt_entry) != 0 + || (unsigned char *)e + sizeof(struct compat_ipt_entry) >= limit) { + duprintf("Bad offset %p, limit = %p\n", e, limit); + return -EINVAL; + } + + if (e->next_offset < sizeof(struct compat_ipt_entry) + + sizeof(struct compat_ipt_entry_target)) { + duprintf("checking: element %p size %u\n", + e, e->next_offset); + return -EINVAL; + } + + if (!ip_checkentry(&e->ip)) { + duprintf("ip_tables: ip check failed %p %s.\n", e, name); + return -EINVAL; + } + + off = 0; + entry_offset = (void *)e - (void *)base; + j = 0; + ret = IPT_MATCH_ITERATE(e, compat_check_calc_match, name, &e->ip, + e->comefrom, &off, &j); + if (ret != 0) + goto out; + + t = ipt_get_target(e); + target = try_then_request_module(xt_find_target(AF_INET, + t->u.user.name, + t->u.user.revision), + "ipt_%s", t->u.user.name); + if (IS_ERR(target) || !target) { + duprintf("check_entry: `%s' not found\n", t->u.user.name); + ret = target ? PTR_ERR(target) : -ENOENT; + goto out; + } + t->u.kernel.target = target; + + if (t->u.kernel.target->compat) + t->u.kernel.target->compat(t, NULL, &off, COMPAT_CALC_SIZE); + *size += off; + ret = compat_add_offset(entry_offset, off); + if (ret) + goto out; + + /* Check hooks & underflows */ + for (h = 0; h < NF_IP_NUMHOOKS; h++) { + if ((unsigned char *)e - base == hook_entries[h]) + newinfo->hook_entry[h] = hook_entries[h]; + if ((unsigned char *)e - base == underflows[h]) + newinfo->underflow[h] = underflows[h]; + } + + /* Clear counters and comefrom */ + e->counters = ((struct ipt_counters) { 0, 0 }); + e->comefrom = 0; + + (*i)++; + return 0; +out: + IPT_MATCH_ITERATE(e, cleanup_match, &j); + return ret; +} + +static inline int compat_copy_match_from_user(struct ipt_entry_match *m, + void **dstptr, compat_uint_t *size, const char *name, + const struct ipt_ip *ip, unsigned int hookmask) +{ + struct ipt_entry_match *dm; + + dm = (struct ipt_entry_match *)*dstptr; + if (m->u.kernel.match->compat) + m->u.kernel.match->compat(m, dstptr, size, COMPAT_FROM_USER); + else { + memcpy(*dstptr, m, m->u.match_size); + *dstptr += m->u.match_size; + } + + if (dm->u.kernel.match->checkentry + && !dm->u.kernel.match->checkentry(name, ip, dm->data, + dm->u.match_size - sizeof(*dm), + hookmask)) { + module_put(dm->u.kernel.match->me); + duprintf("ip_tables: check failed for `%s'.\n", + dm->u.kernel.match->name); + return -EINVAL; + } + + return 0; +} + +static int compat_copy_entry_from_user(struct ipt_entry *e, void **dstptr, + unsigned int *size, const char *name, + struct xt_table_info *newinfo, unsigned char *base) +{ + struct ipt_entry_target *t; + struct ipt_entry *de; + unsigned int origsize; + int ret, h; + + ret = 0; + origsize = *size; + de = (struct ipt_entry *)*dstptr; + memcpy(de, e, sizeof(struct ipt_entry)); + + *dstptr += sizeof(struct compat_ipt_entry); + ret = IPT_MATCH_ITERATE(e, compat_copy_match_from_user, dstptr, size, + name, &de->ip, de->comefrom); + if (ret) + goto out; + de->target_offset = e->target_offset - (origsize - *size); + t = ipt_get_target(e); + if (t->u.kernel.target->compat) + t->u.kernel.target->compat(t, + dstptr, size, COMPAT_FROM_USER); + else { + memcpy(*dstptr, t, t->u.target_size); + *dstptr += t->u.target_size; + } + + de->next_offset = e->next_offset - (origsize - *size); + for (h = 0; h < NF_IP_NUMHOOKS; h++) { + if ((unsigned char *)de - base < newinfo->hook_entry[h]) + newinfo->hook_entry[h] -= origsize - *size; + if ((unsigned char *)de - base < newinfo->underflow[h]) + newinfo->underflow[h] -= origsize - *size; + } + + ret = -EINVAL; + t = ipt_get_target(de); + if (t->u.kernel.target == &ipt_standard_target) { + if (!standard_check(t, *size)) + goto out; + } else if (t->u.kernel.target->checkentry + && !t->u.kernel.target->checkentry(name, de, t->data, + t->u.target_size + - sizeof(*t), + de->comefrom)) { + module_put(t->u.kernel.target->me); + duprintf("ip_tables: compat: check failed for `%s'.\n", + t->u.kernel.target->name); + goto out; + } + ret = 0; +out: + return ret; +} + +static int +translate_compat_table(const char *name, + unsigned int valid_hooks, + struct xt_table_info **pinfo, + void **pentry0, + unsigned int total_size, + unsigned int number, + unsigned int *hook_entries, + unsigned int *underflows) +{ + unsigned int i; + struct xt_table_info *newinfo, *info; + void *pos, *entry0, *entry1; + unsigned int size; + int ret; + + info = *pinfo; + entry0 = *pentry0; + size = total_size; + info->number = number; + + /* Init all hooks to impossible value. */ + for (i = 0; i < NF_IP_NUMHOOKS; i++) { + info->hook_entry[i] = 0xFFFFFFFF; + info->underflow[i] = 0xFFFFFFFF; + } + + duprintf("translate_compat_table: size %u\n", info->size); + i = 0; + down(&compat_ipt_mutex); + /* Walk through entries, checking offsets. */ + ret = IPT_ENTRY_ITERATE(entry0, total_size, + check_compat_entry_size_and_hooks, + info, &size, entry0, + entry0 + total_size, + hook_entries, underflows, &i, name); + if (ret != 0) + goto out_unlock; + + ret = -EINVAL; + if (i != number) { + duprintf("translate_compat_table: %u not %u entries\n", + i, number); + goto out_unlock; + } + + /* Check hooks all assigned */ + for (i = 0; i < NF_IP_NUMHOOKS; i++) { + /* Only hooks which are valid */ + if (!(valid_hooks & (1 << i))) + continue; + if (info->hook_entry[i] == 0xFFFFFFFF) { + duprintf("Invalid hook entry %u %u\n", + i, hook_entries[i]); + goto out_unlock; + } + if (info->underflow[i] == 0xFFFFFFFF) { + duprintf("Invalid underflow %u %u\n", + i, underflows[i]); + goto out_unlock; + } + } + + ret = -ENOMEM; + newinfo = xt_alloc_table_info(size); + if (!newinfo) + goto out_unlock; + + newinfo->number = number; + for (i = 0; i < NF_IP_NUMHOOKS; i++) { + newinfo->hook_entry[i] = info->hook_entry[i]; + newinfo->underflow[i] = info->underflow[i]; + } + entry1 = newinfo->entries[raw_smp_processor_id()]; + pos = entry1; + size = total_size; + ret = IPT_ENTRY_ITERATE(entry0, total_size, + compat_copy_entry_from_user, &pos, &size, + name, newinfo, entry1); + compat_flush_offsets(); + up(&compat_ipt_mutex); + if (ret) + goto free_newinfo; + + ret = -ELOOP; + if (!mark_source_chains(newinfo, valid_hooks, entry1)) + goto free_newinfo; + + /* And one copy for every other CPU */ + for_each_cpu(i) + if (newinfo->entries[i] && newinfo->entries[i] != entry1) + memcpy(newinfo->entries[i], entry1, newinfo->size); + + *pinfo = newinfo; + *pentry0 = entry1; + xt_free_table_info(info); + return 0; + +free_newinfo: + xt_free_table_info(newinfo); +out: + return ret; +out_unlock: + up(&compat_ipt_mutex); + goto out; +} + +static int +compat_do_replace(void __user *user, unsigned int len) +{ + int ret; + struct compat_ipt_replace tmp; + struct xt_table_info *newinfo; + void *loc_cpu_entry; + + if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) + return -EFAULT; + + /* Hack: Causes ipchains to give correct error msg --RR */ + if (len != sizeof(tmp) + tmp.size) + return -ENOPROTOOPT; + + /* overflow check */ + if (tmp.size >= (INT_MAX - sizeof(struct xt_table_info)) / NR_CPUS - + SMP_CACHE_BYTES) + return -ENOMEM; + if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters)) + return -ENOMEM; + + newinfo = xt_alloc_table_info(tmp.size); + if (!newinfo) + return -ENOMEM; + + /* choose the copy that is our node/cpu */ + loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; + if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), + tmp.size) != 0) { + ret = -EFAULT; + goto free_newinfo; + } + + ret = translate_compat_table(tmp.name, tmp.valid_hooks, + &newinfo, &loc_cpu_entry, tmp.size, + tmp.num_entries, tmp.hook_entry, tmp.underflow); + if (ret != 0) + goto free_newinfo; + + duprintf("compat_do_replace: Translated table\n"); + + ret = __do_replace(tmp.name, tmp.valid_hooks, + newinfo, tmp.num_counters, + compat_ptr(tmp.counters)); + if (ret) + goto free_newinfo_untrans; + return 0; + + free_newinfo_untrans: + IPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry,NULL); + free_newinfo: + xt_free_table_info(newinfo); + return ret; +} + +struct compat_ipt_get_entries +{ + char name[IPT_TABLE_MAXNAMELEN]; + compat_uint_t size; + struct compat_ipt_entry entrytable[0]; +}; + +static int compat_copy_entries_to_user(unsigned int total_size, + struct ipt_table *table, void __user *userptr) +{ + unsigned int off, num; + struct compat_ipt_entry e; + struct xt_counters *counters; + struct xt_table_info *private = table->private; + void __user *pos; + unsigned int size; + int ret = 0; + void *loc_cpu_entry; + + counters = alloc_counters(table); + if (IS_ERR(counters)) + return PTR_ERR(counters); + + /* choose the copy that is on our node/cpu, ... + * This choice is lazy (because current thread is + * allowed to migrate to another cpu) + */ + loc_cpu_entry = private->entries[raw_smp_processor_id()]; + pos = userptr; + size = total_size; + ret = IPT_ENTRY_ITERATE(loc_cpu_entry, total_size, + compat_copy_entry_to_user, &pos, &size); + if (ret) + goto free_counters; + + /* ... then go back and fix counters and names */ + for (off = 0, num = 0; off < size; off += e.next_offset, num++) { + unsigned int i; + struct ipt_entry_match m; + struct ipt_entry_target t; + + ret = -EFAULT; + if (copy_from_user(&e, userptr + off, + sizeof(struct compat_ipt_entry))) + goto free_counters; + if (copy_to_user(userptr + off + + offsetof(struct compat_ipt_entry, counters), + &counters[num], sizeof(counters[num]))) + goto free_counters; + + for (i = sizeof(struct compat_ipt_entry); + i < e.target_offset; i += m.u.match_size) { + if (copy_from_user(&m, userptr + off + i, + sizeof(struct ipt_entry_match))) + goto free_counters; + if (copy_to_user(userptr + off + i + + offsetof(struct ipt_entry_match, u.user.name), + m.u.kernel.match->name, + strlen(m.u.kernel.match->name) + 1)) + goto free_counters; + } + + if (copy_from_user(&t, userptr + off + e.target_offset, + sizeof(struct ipt_entry_target))) + goto free_counters; + if (copy_to_user(userptr + off + e.target_offset + + offsetof(struct ipt_entry_target, u.user.name), + t.u.kernel.target->name, + strlen(t.u.kernel.target->name) + 1)) + goto free_counters; + } + ret = 0; +free_counters: + vfree(counters); + return ret; +} + +static int +compat_get_entries(struct compat_ipt_get_entries __user *uptr, int *len) +{ + int ret; + struct compat_ipt_get_entries get; + struct ipt_table *t; + + + if (*len < sizeof(get)) { + duprintf("compat_get_entries: %u < %u\n", + *len, (unsigned int)sizeof(get)); + return -EINVAL; + } + + if (copy_from_user(&get, uptr, sizeof(get)) != 0) + return -EFAULT; + + if (*len != sizeof(struct compat_ipt_get_entries) + get.size) { + duprintf("compat_get_entries: %u != %u\n", *len, + (unsigned int)(sizeof(struct compat_ipt_get_entries) + + get.size)); + return -EINVAL; + } + + down(&compat_ipt_mutex); + t = xt_find_table_lock(AF_INET, get.name); + if (t && !IS_ERR(t)) { + struct xt_table_info *private = t->private; + struct xt_table_info info; + duprintf("t->private->number = %u\n", + private->number); + ret = compat_table_info(private, &info); + if (!ret && get.size == info.size) { + ret = compat_copy_entries_to_user(private->size, + t, uptr->entrytable); + } else if (!ret) { + duprintf("compat_get_entries: I've got %u not %u!\n", + private->size, + get.size); + ret = -EINVAL; + } + compat_flush_offsets(); + module_put(t->me); + xt_table_unlock(t); + } else + ret = t ? PTR_ERR(t) : -ENOENT; + + up(&compat_ipt_mutex); + return ret; +} + +static int +compat_do_ipt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) +{ + int ret; + + switch (cmd) { + case IPT_SO_GET_INFO: + ret = get_info(user, len); + break; + case IPT_SO_GET_ENTRIES: + ret = compat_get_entries(user, len); + break; + default: + duprintf("compat_do_ipt_get_ctl: unknown request %i\n", cmd); + ret = -EINVAL; + } + return ret; +} +#endif + static int do_ipt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) { @@ -1094,6 +2094,11 @@ do_ipt_set_ctl(struct sock *sk, int cmd, if (!capable(CAP_NET_ADMIN)) return -EPERM; +#ifdef CONFIG_COMPAT + if (is_current_32bits() && (cmd == IPT_SO_SET_REPLACE)) + return compat_do_replace(user, len); +#endif + switch (cmd) { case IPT_SO_SET_REPLACE: ret = do_replace(user, len); @@ -1119,66 +2124,19 @@ do_ipt_get_ctl(struct sock *sk, int cmd, if (!capable(CAP_NET_ADMIN)) return -EPERM; - switch (cmd) { - case IPT_SO_GET_INFO: { - char name[IPT_TABLE_MAXNAMELEN]; - struct ipt_table *t; - - if (*len != sizeof(struct ipt_getinfo)) { - duprintf("length %u != %u\n", *len, - sizeof(struct ipt_getinfo)); - ret = -EINVAL; - break; - } - - if (copy_from_user(name, user, sizeof(name)) != 0) { - ret = -EFAULT; - break; - } - name[IPT_TABLE_MAXNAMELEN-1] = '\0'; - - t = try_then_request_module(xt_find_table_lock(AF_INET, name), - "iptable_%s", name); - if (t && !IS_ERR(t)) { - struct ipt_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; +#ifdef CONFIG_COMPAT + if (is_current_32bits()) + return compat_do_ipt_get_ctl(sk, cmd, user, len); +#endif - case IPT_SO_GET_ENTRIES: { - struct ipt_get_entries get; + switch (cmd) { + case IPT_SO_GET_INFO: + ret = get_info(user, len); + break; - if (*len < sizeof(get)) { - duprintf("get_entries: %u < %u\n", *len, sizeof(get)); - ret = -EINVAL; - } else if (copy_from_user(&get, user, sizeof(get)) != 0) { - ret = -EFAULT; - } else if (*len != sizeof(struct ipt_get_entries) + get.size) { - duprintf("get_entries: %u != %u\n", *len, - sizeof(struct ipt_get_entries) + get.size); - ret = -EINVAL; - } else - ret = get_entries(&get, user); + case IPT_SO_GET_ENTRIES: + ret = get_entries(user, len); break; - } case IPT_SO_GET_REVISION_MATCH: case IPT_SO_GET_REVISION_TARGET: { @@ -1327,6 +2285,9 @@ icmp_checkentry(const char *tablename, /* The built-in targets: standard (NULL) and error. */ static struct ipt_target ipt_standard_target = { .name = IPT_STANDARD_TARGET, +#ifdef CONFIG_COMPAT + .compat = &compat_ipt_standard_fn, +#endif }; static struct ipt_target ipt_error_target = { @@ -1348,6 +2309,9 @@ static struct ipt_match icmp_matchstruct .name = "icmp", .match = &icmp_match, .checkentry = &icmp_checkentry, +#ifdef CONFIG_COMPAT + .compat = &icmp_compat, +#endif }; static int __init init(void) @@ -1386,5 +2350,9 @@ static void __exit fini(void) EXPORT_SYMBOL(ipt_register_table); EXPORT_SYMBOL(ipt_unregister_table); EXPORT_SYMBOL(ipt_do_table); +#ifdef CONFIG_COMPAT +EXPORT_SYMBOL(ipt_match_align_compat); +EXPORT_SYMBOL(ipt_target_align_compat); +#endif module_init(init); module_exit(fini); --- ./net/netfilter/xt_tcpudp.c.iptcompat 2006-02-15 16:06:42.000000000 +0300 +++ ./net/netfilter/xt_tcpudp.c 2006-02-17 19:41:58.000000000 +0300 @@ -266,10 +266,35 @@ udp6_checkentry(const char *tablename, return 1; } +#ifdef CONFIG_COMPAT +static int tcp_compat(void *match, + void **dstptr, int *size, int convert) +{ + int off; + + off = XT_ALIGN(sizeof(struct xt_tcp)) - + COMPAT_XT_ALIGN(sizeof(struct xt_tcp)); + return ipt_match_align_compat(match, dstptr, size, off, convert); +} + +static int udp_compat(void *match, + void **dstptr, int *size, int convert) +{ + int off; + + off = XT_ALIGN(sizeof(struct xt_udp)) - + COMPAT_XT_ALIGN(sizeof(struct xt_udp)); + return ipt_match_align_compat(match, dstptr, size, off, convert); +} +#endif + static struct xt_match tcp_matchstruct = { .name = "tcp", .match = &tcp_match, .checkentry = &tcp_checkentry, +#ifdef CONFIG_COMPAT + .compat = &tcp_compat, +#endif .me = THIS_MODULE, }; static struct xt_match tcp6_matchstruct = { @@ -283,6 +308,9 @@ static struct xt_match udp_matchstruct = .name = "udp", .match = &udp_match, .checkentry = &udp_checkentry, +#ifdef CONFIG_COMPAT + .compat = &udp_compat, +#endif .me = THIS_MODULE, }; static struct xt_match udp6_matchstruct = {