This is independent from the AF_UNSPEC patches I send in for the linux
kernel.
===
commit def94a790c6c55ce6c96683f2eb60a0c2f99ac87
Author: Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx>
Date: Thu Feb 14 04:23:04 2008 +0100
Implement AF_UNSPEC as a wildcard for extensions
When a match or target is registered using
xtables_register_{match,target}, xtables.c will consider AF_UNSPEC as
a wildcard when specified as the .family member. Rules between
two competing matches/targets are:
- higher revision (if usable in kernel) wins over lower revision
- in case of same revision: generic AF_UNSPEC loses to specific AF_...
---
extensions/libxt_CLASSIFY.c | 17 +---------------
extensions/libxt_MARK.c | 18 +----------------
extensions/libxt_RATEEST.c | 22 ++-----------------
extensions/libxt_SECMARK.c | 18 +----------------
extensions/libxt_TRACE.c | 13 +-----------
extensions/libxt_length.c | 17 +---------------
extensions/libxt_limit.c | 17 +---------------
extensions/libxt_mark.c | 36 +--------------------------------
extensions/libxt_pkttype.c | 17 +---------------
extensions/libxt_quota.c | 16 +--------------
extensions/libxt_rateest.c | 21 ++-----------------
extensions/libxt_standard.c | 13 +-----------
extensions/libxt_statistic.c | 18 +----------------
extensions/libxt_string.c | 19 +-----------------
extensions/libxt_time.c | 17 +---------------
extensions/libxt_u32.c | 17 +---------------
xtables.c | 22 +++++++++++++++-----
17 files changed, 37 insertions(+), 281 deletions(-)
diff --git a/extensions/libxt_CLASSIFY.c b/extensions/libxt_CLASSIFY.c
index ea6cdbe..1bf9494 100644
--- a/extensions/libxt_CLASSIFY.c
+++ b/extensions/libxt_CLASSIFY.c
@@ -103,21 +103,7 @@ CLASSIFY_save(const void *ip, const struct xt_entry_target *target)
}
static struct xtables_target classify_target = {
- .family = AF_INET,
- .name = "CLASSIFY",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_classify_target_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_classify_target_info)),
- .help = CLASSIFY_help,
- .parse = CLASSIFY_parse,
- .final_check = CLASSIFY_final_check,
- .print = CLASSIFY_print,
- .save = CLASSIFY_save,
- .extra_opts = CLASSIFY_opts,
-};
-
-static struct xtables_target classify_target6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "CLASSIFY",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_classify_target_info)),
@@ -134,5 +120,4 @@ void _init(void);
void _init(void)
{
xtables_register_target(&classify_target);
- xtables_register_target(&classify_target6);
}
diff --git a/extensions/libxt_MARK.c b/extensions/libxt_MARK.c
index 2994e75..4003d26 100644
--- a/extensions/libxt_MARK.c
+++ b/extensions/libxt_MARK.c
@@ -333,22 +333,7 @@ static struct xtables_target mark_tg_reg_v2 = {
.version = IPTABLES_VERSION,
.name = "MARK",
.revision = 2,
- .family = AF_INET,
- .size = XT_ALIGN(sizeof(struct xt_mark_tginfo2)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_mark_tginfo2)),
- .help = mark_tg_help,
- .parse = mark_tg_parse,
- .final_check = mark_tg_check,
- .print = mark_tg_print,
- .save = mark_tg_save,
- .extra_opts = mark_tg_opts,
-};
-
-static struct xtables_target mark_tg6_reg_v2 = {
- .version = IPTABLES_VERSION,
- .name = "MARK",
- .revision = 2,
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.size = XT_ALIGN(sizeof(struct xt_mark_tginfo2)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_tginfo2)),
.help = mark_tg_help,
@@ -366,5 +351,4 @@ void _init(void)
xtables_register_target(&mark_target_v1);
xtables_register_target(&mark_target6_v0);
xtables_register_target(&mark_tg_reg_v2);
- xtables_register_target(&mark_tg6_reg_v2);
}
diff --git a/extensions/libxt_RATEEST.c b/extensions/libxt_RATEEST.c
index df16581..6918f76 100644
--- a/extensions/libxt_RATEEST.c
+++ b/extensions/libxt_RATEEST.c
@@ -203,23 +203,8 @@ RATEEST_save(const void *ip, const struct xt_entry_target *target)
__RATEEST_print(target, "--rateest-");
}
-static struct xtables_target rateest_target4 = {
- .family = AF_INET,
- .name = "RATEEST",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_rateest_target_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_rateest_target_info)),
- .help = RATEEST_help,
- .init = RATEEST_init,
- .parse = RATEEST_parse,
- .final_check = RATEEST_final_check,
- .print = RATEEST_print,
- .save = RATEEST_save,
- .extra_opts = RATEEST_opts,
-};
-
-static struct xtables_target rateest_target6 = {
- .family = AF_INET6,
+static struct xtables_target rateest_tg_reg = {
+ .family = AF_UNSPEC,
.name = "RATEEST",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_rateest_target_info)),
@@ -236,6 +221,5 @@ static struct xtables_target rateest_target6 = {
void _init(void);
void _init(void)
{
- xtables_register_target(&rateest_target4);
- xtables_register_target(&rateest_target6);
+ xtables_register_target(&rateest_tg_reg);
}
diff --git a/extensions/libxt_SECMARK.c b/extensions/libxt_SECMARK.c
index 5dfd21e..d143037 100644
--- a/extensions/libxt_SECMARK.c
+++ b/extensions/libxt_SECMARK.c
@@ -100,22 +100,7 @@ static void SECMARK_save(const void *ip, const struct xt_entry_target *target)
}
static struct xtables_target secmark_target = {
- .family = AF_INET,
- .name = "SECMARK",
- .version = IPTABLES_VERSION,
- .revision = 0,
- .size = XT_ALIGN(sizeof(struct xt_secmark_target_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_secmark_target_info)),
- .help = SECMARK_help,
- .parse = SECMARK_parse,
- .final_check = SECMARK_check,
- .print = SECMARK_print,
- .save = SECMARK_save,
- .extra_opts = SECMARK_opts,
-};
-
-static struct xtables_target secmark_target6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "SECMARK",
.version = IPTABLES_VERSION,
.revision = 0,
@@ -133,5 +118,4 @@ void _init(void);
void _init(void)
{
xtables_register_target(&secmark_target);
- xtables_register_target(&secmark_target6);
}
diff --git a/extensions/libxt_TRACE.c b/extensions/libxt_TRACE.c
index f1d2d94..7241f2b 100644
--- a/extensions/libxt_TRACE.c
+++ b/extensions/libxt_TRACE.c
@@ -24,17 +24,7 @@ static int TRACE_parse(int c, char **argv, int invert, unsigned int *flags,
}
static struct xtables_target trace_target = {
- .family = AF_INET,
- .name = "TRACE",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(0),
- .userspacesize = XT_ALIGN(0),
- .help = TRACE_help,
- .parse = TRACE_parse,
-};
-
-static struct xtables_target trace_target6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "TRACE",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(0),
@@ -47,5 +37,4 @@ void _init(void);
void _init(void)
{
xtables_register_target(&trace_target);
- xtables_register_target(&trace_target6);
}
diff --git a/extensions/libxt_length.c b/extensions/libxt_length.c
index 8fb2150..136034c 100644
--- a/extensions/libxt_length.c
+++ b/extensions/libxt_length.c
@@ -125,21 +125,7 @@ static void length_save(const void *ip, const struct xt_entry_match *match)
}
static struct xtables_match length_match = {
- .family = AF_INET,
- .name = "length",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_length_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_length_info)),
- .help = length_help,
- .parse = length_parse,
- .final_check = length_check,
- .print = length_print,
- .save = length_save,
- .extra_opts = length_opts,
-};
-
-static struct xtables_match length_match6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "length",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_length_info)),
@@ -156,5 +142,4 @@ void _init(void);
void _init(void)
{
xtables_register_match(&length_match);
- xtables_register_match(&length_match6);
}
diff --git a/extensions/libxt_limit.c b/extensions/libxt_limit.c
index e93388b..da64750 100644
--- a/extensions/libxt_limit.c
+++ b/extensions/libxt_limit.c
@@ -165,21 +165,7 @@ static void limit_save(const void *ip, const struct xt_entry_match *match)
}
static struct xtables_match limit_match = {
- .family = AF_INET,
- .name = "limit",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_rateinfo)),
- .userspacesize = offsetof(struct xt_rateinfo, prev),
- .help = limit_help,
- .init = limit_init,
- .parse = limit_parse,
- .print = limit_print,
- .save = limit_save,
- .extra_opts = limit_opts,
-};
-
-static struct xtables_match limit_match6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "limit",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_rateinfo)),
@@ -196,5 +182,4 @@ void _init(void);
void _init(void)
{
xtables_register_match(&limit_match);
- xtables_register_match(&limit_match6);
}
diff --git a/extensions/libxt_mark.c b/extensions/libxt_mark.c
index 1e07736..e805a2b 100644
--- a/extensions/libxt_mark.c
+++ b/extensions/libxt_mark.c
@@ -149,22 +149,7 @@ mark_save(const void *ip, const struct xt_entry_match *match)
}
static struct xtables_match mark_match = {
- .family = AF_INET,
- .name = "mark",
- .revision = 0,
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_mark_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_mark_info)),
- .help = mark_mt_help,
- .parse = mark_parse,
- .final_check = mark_mt_check,
- .print = mark_print,
- .save = mark_save,
- .extra_opts = mark_mt_opts,
-};
-
-static struct xtables_match mark_match6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "mark",
.revision = 0,
.version = IPTABLES_VERSION,
@@ -182,22 +167,7 @@ static struct xtables_match mark_mt_reg = {
.version = IPTABLES_VERSION,
.name = "mark",
.revision = 1,
- .family = AF_INET,
- .size = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
- .help = mark_mt_help,
- .parse = mark_mt_parse,
- .final_check = mark_mt_check,
- .print = mark_mt_print,
- .save = mark_mt_save,
- .extra_opts = mark_mt_opts,
-};
-
-static struct xtables_match mark_mt6_reg = {
- .version = IPTABLES_VERSION,
- .name = "mark",
- .revision = 1,
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.size = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
.help = mark_mt_help,
@@ -212,7 +182,5 @@ void _init(void);
void _init(void)
{
xtables_register_match(&mark_match);
- xtables_register_match(&mark_match6);
xtables_register_match(&mark_mt_reg);
- xtables_register_match(&mark_mt6_reg);
}
diff --git a/extensions/libxt_pkttype.c b/extensions/libxt_pkttype.c
index 893fe43..a5cf90a 100644
--- a/extensions/libxt_pkttype.c
+++ b/extensions/libxt_pkttype.c
@@ -147,21 +147,7 @@ static void pkttype_save(const void *ip, const struct xt_entry_match *match)
}
static struct xtables_match pkttype_match = {
- .family = AF_INET,
- .name = "pkttype",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_pkttype_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_pkttype_info)),
- .help = pkttype_help,
- .parse = pkttype_parse,
- .final_check = pkttype_check,
- .print = pkttype_print,
- .save = pkttype_save,
- .extra_opts = pkttype_opts,
-};
-
-static struct xtables_match pkttype_match6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "pkttype",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_pkttype_info)),
@@ -178,5 +164,4 @@ void _init(void);
void _init(void)
{
xtables_register_match(&pkttype_match);
- xtables_register_match(&pkttype_match6);
}
diff --git a/extensions/libxt_quota.c b/extensions/libxt_quota.c
index 9ce350d..f73089d 100644
--- a/extensions/libxt_quota.c
+++ b/extensions/libxt_quota.c
@@ -78,20 +78,7 @@ quota_parse(int c, char **argv, int invert, unsigned int *flags,
}
struct xtables_match quota_match = {
- .family = AF_INET,
- .name = "quota",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof (struct xt_quota_info)),
- .userspacesize = offsetof(struct xt_quota_info, quota),
- .help = quota_help,
- .parse = quota_parse,
- .print = quota_print,
- .save = quota_save,
- .extra_opts = quota_opts,
-};
-
-struct xtables_match quota_match6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "quota",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof (struct xt_quota_info)),
@@ -107,5 +94,4 @@ void _init(void);
void _init(void)
{
xtables_register_match("a_match);
- xtables_register_match("a_match6);
}
diff --git a/extensions/libxt_rateest.c b/extensions/libxt_rateest.c
index 0771fcd..69edaba 100644
--- a/extensions/libxt_rateest.c
+++ b/extensions/libxt_rateest.c
@@ -426,22 +426,8 @@ rateest_save(const void *ip, const struct xt_entry_match *match)
}
}
-static struct xtables_match rateest_match4 = {
- .family = AF_INET,
- .name = "rateest",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_rateest_match_info)),
- .userspacesize = XT_ALIGN(offsetof(struct xt_rateest_match_info, est1)),
- .help = rateest_help,
- .parse = rateest_parse,
- .final_check = rateest_final_check,
- .print = rateest_print,
- .save = rateest_save,
- .extra_opts = rateest_opts,
-};
-
-static struct xtables_match rateest_match6 = {
- .family = AF_INET6,
+static struct xtables_match rateest_mt_reg = {
+ .family = AF_UNSPEC,
.name = "rateest",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_rateest_match_info)),
@@ -457,6 +443,5 @@ static struct xtables_match rateest_match6 = {
void _init(void);
void _init(void)
{
- xtables_register_match(&rateest_match4);
- xtables_register_match(&rateest_match6);
+ xtables_register_match(&rateest_mt_reg);
}
diff --git a/extensions/libxt_standard.c b/extensions/libxt_standard.c
index 2417f09..68bf16d 100644
--- a/extensions/libxt_standard.c
+++ b/extensions/libxt_standard.c
@@ -24,17 +24,7 @@ static int standard_parse(int c, char **argv, int invert, unsigned int *flags,
}
static struct xtables_target standard_target = {
- .family = AF_INET,
- .name = "standard",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(int)),
- .userspacesize = XT_ALIGN(sizeof(int)),
- .help = standard_help,
- .parse = standard_parse,
-};
-
-static struct xtables_target standard_target6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "standard",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(int)),
@@ -47,5 +37,4 @@ void _init(void);
void _init(void)
{
xtables_register_target(&standard_target);
- xtables_register_target(&standard_target6);
}
diff --git a/extensions/libxt_statistic.c b/extensions/libxt_statistic.c
index 5ac77b6..67cf9e3 100644
--- a/extensions/libxt_statistic.c
+++ b/extensions/libxt_statistic.c
@@ -164,22 +164,7 @@ static void statistic_save(const void *ip, const struct xt_entry_match *match)
}
static struct xtables_match statistic_match = {
- .family = AF_INET,
- .name = "statistic",
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_statistic_info)),
- .userspacesize = offsetof(struct xt_statistic_info, u.nth.count),
- .init = statistic_mt_init,
- .help = statistic_help,
- .parse = statistic_parse,
- .final_check = statistic_check,
- .print = statistic_print,
- .save = statistic_save,
- .extra_opts = statistic_opts,
-};
-
-static struct xtables_match statistic_match6 = {
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.name = "statistic",
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_statistic_info)),
@@ -197,5 +182,4 @@ void _init(void);
void _init(void)
{
xtables_register_match(&statistic_match);
- xtables_register_match(&statistic_match6);
}
diff --git a/extensions/libxt_string.c b/extensions/libxt_string.c
index 5be14ef..182d474 100644
--- a/extensions/libxt_string.c
+++ b/extensions/libxt_string.c
@@ -327,23 +327,7 @@ static void string_save(const void *ip, const struct xt_entry_match *match)
static struct xtables_match string_match = {
.name = "string",
- .family = AF_INET,
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_string_info)),
- .userspacesize = offsetof(struct xt_string_info, config),
- .help = string_help,
- .init = string_init,
- .parse = string_parse,
- .final_check = string_check,
- .print = string_print,
- .save = string_save,
- .extra_opts = string_opts,
-};
-
-
-static struct xtables_match string_match6 = {
- .name = "string",
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_string_info)),
.userspacesize = offsetof(struct xt_string_info, config),
@@ -360,5 +344,4 @@ void _init(void);
void _init(void)
{
xtables_register_match(&string_match);
- xtables_register_match(&string_match6);
}
diff --git a/extensions/libxt_time.c b/extensions/libxt_time.c
index 3efc727..3a9ccd6 100644
--- a/extensions/libxt_time.c
+++ b/extensions/libxt_time.c
@@ -466,21 +466,7 @@ static void time_save(const void *ip, const struct xt_entry_match *match)
static struct xtables_match time_match = {
.name = "time",
- .family = AF_INET,
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_time_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_time_info)),
- .help = time_help,
- .init = time_init,
- .parse = time_parse,
- .print = time_print,
- .save = time_save,
- .extra_opts = time_opts,
-};
-
-static struct xtables_match time_match6 = {
- .name = "time",
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_time_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_time_info)),
@@ -496,5 +482,4 @@ void _init(void);
void _init(void)
{
xtables_register_match(&time_match);
- xtables_register_match(&time_match6);
}
diff --git a/extensions/libxt_u32.c b/extensions/libxt_u32.c
index 1e79c57..2dff28f 100644
--- a/extensions/libxt_u32.c
+++ b/extensions/libxt_u32.c
@@ -272,20 +272,7 @@ static void u32_save(const void *ip, const struct xt_entry_match *match)
static struct xtables_match u32_match = {
.name = "u32",
- .family = AF_INET,
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_u32)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_u32)),
- .help = u32_help,
- .parse = u32_parse,
- .print = u32_print,
- .save = u32_save,
- .extra_opts = u32_opts,
-};
-
-static struct xtables_match u32_match6 = {
- .name = "u32",
- .family = AF_INET6,
+ .family = AF_UNSPEC,
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_u32)),
.userspacesize = XT_ALIGN(sizeof(struct xt_u32)),
@@ -300,6 +287,4 @@ void _init(void);
void _init(void)
{
xtables_register_match(&u32_match);
- xtables_register_match(&u32_match6);
- return;
}
diff --git a/xtables.c b/xtables.c
index 0405e3e..1ff76f2 100644
--- a/xtables.c
+++ b/xtables.c
@@ -549,12 +549,13 @@ void xtables_register_match(struct xtables_match *me)
}
/* ignore not interested match */
- if (me->family != afinfo.family)
+ if (me->family != afinfo.family && me->family != AF_UNSPEC)
return;
old = find_match(me->name, DURING_LOAD, NULL);
if (old) {
- if (old->revision == me->revision) {
+ if (old->revision == me->revision &&
+ old->family == me->family) {
fprintf(stderr,
"%s: match `%s' already registered.\n",
program_name, me->name);
@@ -566,10 +567,14 @@ void xtables_register_match(struct xtables_match *me)
&& old->revision > me->revision)
return;
- /* Replace if compatible. */
+ /* See if new match can be used. */
if (!compatible_match_revision(me->name, me->revision))
return;
+ /* Prefer !AF_UNSPEC over AF_UNSPEC for same revision. */
+ if (old->revision == me->revision && me->family == AF_UNSPEC)
+ return;
+
/* Delete old one. */
for (i = &xtables_matches; *i!=old; i = &(*i)->next);
*i = old->next;
@@ -615,14 +620,15 @@ void xtables_register_target(struct xtables_target *me)
}
/* ignore not interested target */
- if (me->family != afinfo.family)
+ if (me->family != afinfo.family && me->family != AF_UNSPEC)
return;
old = find_target(me->name, DURING_LOAD);
if (old) {
struct xtables_target **i;
- if (old->revision == me->revision) {
+ if (old->revision == me->revision &&
+ old->family == me->family) {
fprintf(stderr,
"%s: target `%s' already registered.\n",
program_name, me->name);
@@ -634,10 +640,14 @@ void xtables_register_target(struct xtables_target *me)
&& old->revision > me->revision)
return;
- /* Replace if compatible. */
+ /* See if new target can be used. */
if (!compatible_target_revision(me->name, me->revision))
return;
+ /* Prefer !AF_UNSPEC over AF_UNSPEC for same revision. */
+ if (old->revision == me->revision && me->family == AF_UNSPEC)
+ return;
+
/* Delete old one. */
for (i = &xtables_targets; *i!=old; i = &(*i)->next);
*i = old->next;
--
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