Support passing arbitrary data (via void pointer) to the callback.
Signed-off-by: Phil Sutter <p...@nwl.cc>
---
iptables/nft.c | 6 +++---
iptables/nft.h | 2 +-
iptables/xtables-save.c | 27 +++++++++++++++++----------
3 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/iptables/nft.c b/iptables/nft.c
index 8f0d5e664eca6..cd42af70b54ef 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -2092,8 +2092,8 @@ err:
}
int nft_for_each_table(struct nft_handle *h,
- int (*func)(struct nft_handle *h, const char *tablename,
bool counters),
- bool counters)
+ int (*func)(struct nft_handle *h, const char *tablename,
void *data),
+ void *data)
{
struct nftnl_table_list *list;
struct nftnl_table_list_iter *iter;
@@ -2112,7 +2112,7 @@ int nft_for_each_table(struct nft_handle *h,
const char *tablename =
nftnl_table_get(t, NFTNL_TABLE_NAME);
- func(h, tablename, counters);
+ func(h, tablename, data);
t = nftnl_table_list_iter_next(iter);
}
diff --git a/iptables/nft.h b/iptables/nft.h
index dc1161840a38c..da078a44bab7b 100644
--- a/iptables/nft.h
+++ b/iptables/nft.h
@@ -81,7 +81,7 @@ void nft_build_cache(struct nft_handle *h);
struct nftnl_table;
struct nftnl_chain_list;
-int nft_for_each_table(struct nft_handle *h, int (*func)(struct nft_handle *h,
const char *tablename, bool counters), bool counters);
+int nft_for_each_table(struct nft_handle *h, int (*func)(struct nft_handle *h,
const char *tablename, void *data), void *data);
bool nft_table_find(struct nft_handle *h, const char *tablename);
int nft_table_purge_chains(struct nft_handle *h, const char *table, struct
nftnl_chain_list *list);
int nft_table_flush(struct nft_handle *h, const char *table);
diff --git a/iptables/xtables-save.c b/iptables/xtables-save.c
index 811ec6330a4cb..484450f03354f 100644
--- a/iptables/xtables-save.c
+++ b/iptables/xtables-save.c
@@ -62,10 +62,15 @@ static const struct option ebt_save_options[] = {
static bool ebt_legacy_counter_format;
+struct do_output_data {
+ bool counters;
+};
+
static int
-__do_output(struct nft_handle *h, const char *tablename, bool counters)
+__do_output(struct nft_handle *h, const char *tablename, void *data)
{
struct nftnl_chain_list *chain_list;
+ struct do_output_data *d = data;
if (!nft_table_builtin_find(h, tablename))
return 0;
@@ -89,7 +94,7 @@ __do_output(struct nft_handle *h, const char *tablename, bool
counters)
/* Dump out chain names first,
* thereby preventing dependency conflicts */
nft_chain_save(h, chain_list);
- nft_rule_save(h, tablename, counters ? 0 : FMT_NOCOUNTS);
+ nft_rule_save(h, tablename, d->counters ? 0 : FMT_NOCOUNTS);
now = time(NULL);
printf("COMMIT\n");
@@ -98,12 +103,12 @@ __do_output(struct nft_handle *h, const char *tablename,
bool counters)
}
static int
-do_output(struct nft_handle *h, const char *tablename, bool counters)
+do_output(struct nft_handle *h, const char *tablename, struct do_output_data
*d)
{
int ret;
if (!tablename) {
- ret = nft_for_each_table(h, __do_output, counters);
+ ret = nft_for_each_table(h, __do_output, d);
nft_check_xt_legacy(h->family, true);
return !!ret;
}
@@ -114,7 +119,7 @@ do_output(struct nft_handle *h, const char *tablename, bool
counters)
return 1;
}
- ret = __do_output(h, tablename, counters);
+ ret = __do_output(h, tablename, d);
nft_check_xt_legacy(h->family, true);
return ret;
}
@@ -128,6 +133,7 @@ xtables_save_main(int family, int argc, char *argv[])
{
const struct builtin_table *tables;
const char *tablename = NULL;
+ struct do_output_data d = {};
bool dump = false;
struct nft_handle h = {
.family = family,
@@ -150,7 +156,7 @@ xtables_save_main(int family, int argc, char *argv[])
fprintf(stderr, "-b/--binary option is not
implemented\n");
break;
case 'c':
- show_counters = true;
+ d.counters = true;
break;
case 't':
@@ -229,7 +235,7 @@ xtables_save_main(int family, int argc, char *argv[])
exit(EXIT_FAILURE);
}
- ret = do_output(&h, tablename, show_counters);
+ ret = do_output(&h, tablename, &d);
nft_fini(&h);
if (dump)
exit(0);
@@ -247,10 +253,11 @@ int xtables_ip6_save_main(int argc, char *argv[])
return xtables_save_main(NFPROTO_IPV6, argc, argv);
}
-static int __ebt_save(struct nft_handle *h, const char *tablename, bool
counters)
+static int __ebt_save(struct nft_handle *h, const char *tablename, void *data)
{
struct nftnl_chain_list *chain_list;
unsigned int format = FMT_NOCOUNTS;
+ bool *counters = data;
time_t now;
if (!nft_table_find(h, tablename)) {
@@ -286,9 +293,9 @@ static int __ebt_save(struct nft_handle *h, const char
*tablename, bool counters
static int ebt_save(struct nft_handle *h, const char *tablename, bool counters)
{
if (!tablename)
- return nft_for_each_table(h, __ebt_save, counters);
+ return nft_for_each_table(h, __ebt_save, &counters);
- return __ebt_save(h, tablename, counters);
+ return __ebt_save(h, tablename, &counters);
}
int xtables_eb_save_main(int argc_, char *argv_[])
--
2.22.0
