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iptables-1.8.7-11.el9

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- Fix License name in spec file
- Eliminate inet_aton() and inet_ntoa()
- nft-arp: Make use of ipv4_addr_to_string()
- Make legacy sub-packages obsolete older non-legacy ones
- Fix dates in changelog
- iptables.init: Fix functionality for iptables-nft
- iptables.init: Ignore sysctl files not suffixed '.conf'
- iptables.init: Drop unused NEW_MODUTILS check
- iptables.init: Drop some trailing whitespace

Resolves: RHBZ#1954581, RHBZ#1958262
This commit is contained in:
Phil Sutter 2021-05-12 12:12:59 +02:00
parent b6b32fa391
commit 4a68e9f94a
6 changed files with 556 additions and 28 deletions
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6
0001-ebtables-Exit-gracefully-on-invalid-table-names.patch
View File

@ -1,4 +1,4 @@
From 30c1d443896311e69762d6b51b63908ec602574f Mon Sep 17 00:00:00 2001
From cf2d347fe9cc384d4453a2a379e0dde8b97d081f Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Thu, 28 Jan 2021 01:09:56 +0100
Subject: [PATCH] ebtables: Exit gracefully on invalid table names
@ -22,7 +22,7 @@ With this patch in place, output looks much better:
| Perhaps iptables or your kernel needs to be upgraded.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Phil Sutter <psutter@redhat.com>
(cherry picked from commit 30c1d443896311e69762d6b51b63908ec602574f)
---
iptables/xtables-eb.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
@ -47,5 +47,5 @@ index cfa9317c78e94..5bb34d6d292a9 100644
table_set = true;
break;
--
2.28.0
2.31.1

196
0002-xtables-translate-Fix-translation-of-odd-netmasks.patch Normal file
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@ -0,0 +1,196 @@
From 14aed83fa22c5322637ec87a18d0d022d34b8d13 Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Tue, 2 Mar 2021 14:50:07 +0100
Subject: [PATCH] xtables-translate: Fix translation of odd netmasks
Iptables supports netmasks which are not prefixes to match on (or
ignore) arbitrary bits in an address. Yet nftables' prefix notation is
available for real prefixes only, so translation is not as trivial -
print bitmask syntax for those cases.
Signed-off-by: Phil Sutter <phil@nwl.cc>
(cherry picked from commit 46f9d3a9a61ee80fa94b7fa7b3b36045c92606ae)
---
extensions/generic.txlate | 48 +++++++++++++++++++++++++++++++++++++
extensions/libxt_standard.t | 12 ++++++++++
iptables/nft-ipv4.c | 42 ++++++++++++++++++++++----------
iptables/nft-ipv6.c | 19 ++++++++++++---
4 files changed, 106 insertions(+), 15 deletions(-)
diff --git a/extensions/generic.txlate b/extensions/generic.txlate
index 0e256c3727559..9ae9a5b54c1b9 100644
--- a/extensions/generic.txlate
+++ b/extensions/generic.txlate
@@ -10,6 +10,54 @@ nft insert rule ip filter INPUT iifname "iifname" ip saddr 10.0.0.0/8 counter
iptables-translate -A INPUT -i iif+ ! -d 10.0.0.0/8
nft add rule ip filter INPUT iifname "iif*" ip daddr != 10.0.0.0/8 counter
+iptables-translate -I INPUT -s 10.11.12.13/255.255.0.0
+nft insert rule ip filter INPUT ip saddr 10.11.0.0/16 counter
+
+iptables-translate -I INPUT -s 10.11.12.13/255.0.255.0
+nft insert rule ip filter INPUT ip saddr & 255.0.255.0 == 10.0.12.0 counter
+
+iptables-translate -I INPUT -s 10.11.12.13/0.255.0.255
+nft insert rule ip filter INPUT ip saddr & 0.255.0.255 == 0.11.0.13 counter
+
+iptables-translate -I INPUT ! -s 10.11.12.13/0.255.0.255
+nft insert rule ip filter INPUT ip saddr & 0.255.0.255 != 0.11.0.13 counter
+
+iptables-translate -I INPUT -s 0.0.0.0/16
+nft insert rule ip filter INPUT ip saddr 0.0.0.0/16 counter
+
+iptables-translate -I INPUT -s 0.0.0.0/0
+nft insert rule ip filter INPUT counter
+
+iptables-translate -I INPUT ! -s 0.0.0.0/0
+nft insert rule ip filter INPUT ip saddr != 0.0.0.0/0 counter
+
+ip6tables-translate -I INPUT -i iifname -s feed::/16
+nft insert rule ip6 filter INPUT iifname "iifname" ip6 saddr feed::/16 counter
+
+ip6tables-translate -A INPUT -i iif+ ! -d feed::/16
+nft add rule ip6 filter INPUT iifname "iif*" ip6 daddr != feed::/16 counter
+
+ip6tables-translate -I INPUT -s feed:babe::1/ffff:ff00::
+nft insert rule ip6 filter INPUT ip6 saddr feed:ba00::/24 counter
+
+ip6tables-translate -I INPUT -s feed:babe:c0ff:ee00:c0be:1234:5678:90ab/ffff:0:ffff:0:ffff:0:ffff:0
+nft insert rule ip6 filter INPUT ip6 saddr & ffff:0:ffff:0:ffff:0:ffff:0 == feed:0:c0ff:0:c0be:0:5678:0 counter
+
+ip6tables-translate -I INPUT -s feed:babe:c0ff:ee00:c0be:1234:5678:90ab/0:ffff:0:ffff:0:ffff:0:ffff
+nft insert rule ip6 filter INPUT ip6 saddr & 0:ffff:0:ffff:0:ffff:0:ffff == 0:babe:0:ee00:0:1234:0:90ab counter
+
+ip6tables-translate -I INPUT ! -s feed:babe:c0ff:ee00:c0be:1234:5678:90ab/0:ffff:0:ffff:0:ffff:0:ffff
+nft insert rule ip6 filter INPUT ip6 saddr & 0:ffff:0:ffff:0:ffff:0:ffff != 0:babe:0:ee00:0:1234:0:90ab counter
+
+ip6tables-translate -I INPUT -s ::/16
+nft insert rule ip6 filter INPUT ip6 saddr ::/16 counter
+
+ip6tables-translate -I INPUT -s ::/0
+nft insert rule ip6 filter INPUT counter
+
+ip6tables-translate -I INPUT ! -s ::/0
+nft insert rule ip6 filter INPUT ip6 saddr != ::/0 counter
+
ebtables-translate -I INPUT -i iname --logical-in ilogname -s 0:0:0:0:0:0
nft insert rule bridge filter INPUT iifname "iname" meta ibrname "ilogname" ether saddr 00:00:00:00:00:00 counter
diff --git a/extensions/libxt_standard.t b/extensions/libxt_standard.t
index 4313f7b7bac9d..56d6da2e5884e 100644
--- a/extensions/libxt_standard.t
+++ b/extensions/libxt_standard.t
@@ -9,3 +9,15 @@
-j ACCEPT;=;OK
-j RETURN;=;OK
! -p 0 -j ACCEPT;=;FAIL
+-s 10.11.12.13/8;-s 10.0.0.0/8;OK
+-s 10.11.12.13/9;-s 10.0.0.0/9;OK
+-s 10.11.12.13/10;-s 10.0.0.0/10;OK
+-s 10.11.12.13/11;-s 10.0.0.0/11;OK
+-s 10.11.12.13/12;-s 10.0.0.0/12;OK
+-s 10.11.12.13/30;-s 10.11.12.12/30;OK
+-s 10.11.12.13/31;-s 10.11.12.12/31;OK
+-s 10.11.12.13/32;-s 10.11.12.13/32;OK
+-s 10.11.12.13/255.0.0.0;-s 10.0.0.0/8;OK
+-s 10.11.12.13/255.128.0.0;-s 10.0.0.0/9;OK
+-s 10.11.12.13/255.0.255.0;-s 10.0.12.0/255.0.255.0;OK
+-s 10.11.12.13/255.0.12.0;-s 10.0.12.0/255.0.12.0;OK
diff --git a/iptables/nft-ipv4.c b/iptables/nft-ipv4.c
index fdc15c6f04066..0d32a30010519 100644
--- a/iptables/nft-ipv4.c
+++ b/iptables/nft-ipv4.c
@@ -383,6 +383,32 @@ static void nft_ipv4_post_parse(int command,
" source or destination IP addresses");
}
+static void xlate_ipv4_addr(const char *selector, const struct in_addr *addr,
+ const struct in_addr *mask,
+ bool inv, struct xt_xlate *xl)
+{
+ const char *op = inv ? "!= " : "";
+ int cidr;
+
+ if (!inv && !addr->s_addr && !mask->s_addr)
+ return;
+
+ cidr = xtables_ipmask_to_cidr(mask);
+ switch (cidr) {
+ case -1:
+ /* inet_ntoa() is not reentrant */
+ xt_xlate_add(xl, "%s & %s ", selector, inet_ntoa(*mask));
+ xt_xlate_add(xl, "%s %s ", inv ? "!=" : "==", inet_ntoa(*addr));
+ break;
+ case 32:
+ xt_xlate_add(xl, "%s %s%s ", selector, op, inet_ntoa(*addr));
+ break;
+ default:
+ xt_xlate_add(xl, "%s %s%s/%d ", selector, op, inet_ntoa(*addr),
+ cidr);
+ }
+}
+
static int nft_ipv4_xlate(const void *data, struct xt_xlate *xl)
{
const struct iptables_command_state *cs = data;
@@ -417,18 +443,10 @@ static int nft_ipv4_xlate(const void *data, struct xt_xlate *xl)
}
}
- if (cs->fw.ip.src.s_addr != 0) {
- xt_xlate_add(xl, "ip saddr %s%s%s ",
- cs->fw.ip.invflags & IPT_INV_SRCIP ? "!= " : "",
- inet_ntoa(cs->fw.ip.src),
- xtables_ipmask_to_numeric(&cs->fw.ip.smsk));
- }
- if (cs->fw.ip.dst.s_addr != 0) {
- xt_xlate_add(xl, "ip daddr %s%s%s ",
- cs->fw.ip.invflags & IPT_INV_DSTIP ? "!= " : "",
- inet_ntoa(cs->fw.ip.dst),
- xtables_ipmask_to_numeric(&cs->fw.ip.dmsk));
- }
+ xlate_ipv4_addr("ip saddr", &cs->fw.ip.src, &cs->fw.ip.smsk,
+ cs->fw.ip.invflags & IPT_INV_SRCIP, xl);
+ xlate_ipv4_addr("ip daddr", &cs->fw.ip.dst, &cs->fw.ip.dmsk,
+ cs->fw.ip.invflags & IPT_INV_DSTIP, xl);
ret = xlate_matches(cs, xl);
if (!ret)
diff --git a/iptables/nft-ipv6.c b/iptables/nft-ipv6.c
index 130ad3e6e7c44..46008fc5e762a 100644
--- a/iptables/nft-ipv6.c
+++ b/iptables/nft-ipv6.c
@@ -337,14 +337,27 @@ static void xlate_ipv6_addr(const char *selector, const struct in6_addr *addr,
const struct in6_addr *mask,
int invert, struct xt_xlate *xl)
{
+ const char *op = invert ? "!= " : "";
char addr_str[INET6_ADDRSTRLEN];
+ int cidr;
- if (!invert && IN6_IS_ADDR_UNSPECIFIED(addr))
+ if (!invert && IN6_IS_ADDR_UNSPECIFIED(addr) && IN6_IS_ADDR_UNSPECIFIED(mask))
return;
inet_ntop(AF_INET6, addr, addr_str, INET6_ADDRSTRLEN);
- xt_xlate_add(xl, "%s %s%s%s ", selector, invert ? "!= " : "", addr_str,
- xtables_ip6mask_to_numeric(mask));
+ cidr = xtables_ip6mask_to_cidr(mask);
+ switch (cidr) {
+ case -1:
+ xt_xlate_add(xl, "%s & %s %s %s ", selector,
+ xtables_ip6addr_to_numeric(mask),
+ invert ? "!=" : "==", addr_str);
+ break;
+ case 128:
+ xt_xlate_add(xl, "%s %s%s ", selector, op, addr_str);
+ break;
+ default:
+ xt_xlate_add(xl, "%s %s%s/%d ", selector, op, addr_str, cidr);
+ }
}
static int nft_ipv6_xlate(const void *data, struct xt_xlate *xl)
--
2.31.1

120
0003-Eliminate-inet_aton-and-inet_ntoa.patch Normal file
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@ -0,0 +1,120 @@
From 76a32fe33a948ddce6b9cacee5400d83b0a6cdba Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Tue, 27 Apr 2021 09:12:53 +0200
Subject: [PATCH] Eliminate inet_aton() and inet_ntoa()
Both functions are obsolete, replace them by equivalent calls to
inet_pton() and inet_ntop().
Signed-off-by: Phil Sutter <phil@nwl.cc>
(cherry picked from commit acac2dbe64e5120394fa715bb5fe95c42d08b8b3)
---
extensions/libebt_among.c | 6 ++++--
iptables/nft-ipv4.c | 23 ++++++++++++++---------
2 files changed, 18 insertions(+), 11 deletions(-)
diff --git a/extensions/libebt_among.c b/extensions/libebt_among.c
index 2b9a1b6566684..7eb898f984bba 100644
--- a/extensions/libebt_among.c
+++ b/extensions/libebt_among.c
@@ -66,7 +66,7 @@ parse_nft_among_pair(char *buf, struct nft_among_pair *pair, bool have_ip)
if (sep) {
*sep = '\0';
- if (!inet_aton(sep + 1, &pair->in))
+ if (!inet_pton(AF_INET, sep + 1, &pair->in))
xtables_error(PARAMETER_PROBLEM,
"Invalid IP address '%s'\n", sep + 1);
}
@@ -194,6 +194,7 @@ static void __bramong_print(struct nft_among_pair *pairs,
int cnt, bool inv, bool have_ip)
{
const char *isep = inv ? "! " : "";
+ char abuf[INET_ADDRSTRLEN];
int i;
for (i = 0; i < cnt; i++) {
@@ -202,7 +203,8 @@ static void __bramong_print(struct nft_among_pair *pairs,
printf("%s", ether_ntoa(&pairs[i].ether));
if (pairs[i].in.s_addr != INADDR_ANY)
- printf("=%s", inet_ntoa(pairs[i].in));
+ printf("=%s", inet_ntop(AF_INET, &pairs[i].in,
+ abuf, sizeof(abuf)));
}
printf(" ");
}
diff --git a/iptables/nft-ipv4.c b/iptables/nft-ipv4.c
index 0d32a30010519..a5b835b1f681d 100644
--- a/iptables/nft-ipv4.c
+++ b/iptables/nft-ipv4.c
@@ -136,7 +136,7 @@ static void get_frag(struct nft_xt_ctx *ctx, struct nftnl_expr *e, bool *inv)
static const char *mask_to_str(uint32_t mask)
{
- static char mask_str[sizeof("255.255.255.255")];
+ static char mask_str[INET_ADDRSTRLEN];
uint32_t bits, hmask = ntohl(mask);
struct in_addr mask_addr = {
.s_addr = mask,
@@ -155,7 +155,7 @@ static const char *mask_to_str(uint32_t mask)
if (i >= 0)
sprintf(mask_str, "%u", i);
else
- sprintf(mask_str, "%s", inet_ntoa(mask_addr));
+ inet_ntop(AF_INET, &mask_addr, mask_str, sizeof(mask_str));
return mask_str;
}
@@ -298,10 +298,13 @@ static void nft_ipv4_print_rule(struct nft_handle *h, struct nftnl_rule *r,
static void save_ipv4_addr(char letter, const struct in_addr *addr,
uint32_t mask, int invert)
{
+ char addrbuf[INET_ADDRSTRLEN];
+
if (!mask && !invert && !addr->s_addr)
return;
- printf("%s-%c %s/%s ", invert ? "! " : "", letter, inet_ntoa(*addr),
+ printf("%s-%c %s/%s ", invert ? "! " : "", letter,
+ inet_ntop(AF_INET, addr, addrbuf, sizeof(addrbuf)),
mask_to_str(mask));
}
@@ -387,25 +390,27 @@ static void xlate_ipv4_addr(const char *selector, const struct in_addr *addr,
const struct in_addr *mask,
bool inv, struct xt_xlate *xl)
{
+ char mbuf[INET_ADDRSTRLEN], abuf[INET_ADDRSTRLEN];
const char *op = inv ? "!= " : "";
int cidr;
if (!inv && !addr->s_addr && !mask->s_addr)
return;
+ inet_ntop(AF_INET, addr, abuf, sizeof(abuf));
+
cidr = xtables_ipmask_to_cidr(mask);
switch (cidr) {
case -1:
- /* inet_ntoa() is not reentrant */
- xt_xlate_add(xl, "%s & %s ", selector, inet_ntoa(*mask));
- xt_xlate_add(xl, "%s %s ", inv ? "!=" : "==", inet_ntoa(*addr));
+ xt_xlate_add(xl, "%s & %s %s %s ", selector,
+ inet_ntop(AF_INET, mask, mbuf, sizeof(mbuf)),
+ inv ? "!=" : "==", abuf);
break;
case 32:
- xt_xlate_add(xl, "%s %s%s ", selector, op, inet_ntoa(*addr));
+ xt_xlate_add(xl, "%s %s%s ", selector, op, abuf);
break;
default:
- xt_xlate_add(xl, "%s %s%s/%d ", selector, op, inet_ntoa(*addr),
- cidr);
+ xt_xlate_add(xl, "%s %s%s/%d ", selector, op, abuf, cidr);
}
}
--
2.31.1

181
0004-nft-arp-Make-use-of-ipv4_addr_to_string.patch Normal file
View File

@ -0,0 +1,181 @@
From 1285f9a043e4ef9d99d8788315dc4398299bb8a8 Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Tue, 27 Apr 2021 10:02:34 +0200
Subject: [PATCH] nft-arp: Make use of ipv4_addr_to_string()
This eliminates quite a bit of redundant code apart from also dropping
use of obsolete function gethostbyaddr().
Signed-off-by: Phil Sutter <phil@nwl.cc>
(cherry picked from commit 1e984079817a3c804eae25dea937d63d18c57a6c)
---
iptables/nft-arp.c | 99 ++++------------------------------------------
iptables/xshared.c | 6 +--
iptables/xshared.h | 3 ++
3 files changed, 14 insertions(+), 94 deletions(-)
diff --git a/iptables/nft-arp.c b/iptables/nft-arp.c
index c82ffdc95e300..2a9387a18dffe 100644
--- a/iptables/nft-arp.c
+++ b/iptables/nft-arp.c
@@ -42,78 +42,6 @@ char *arp_opcodes[] =
"ARP_NAK",
};
-static char *
-addr_to_dotted(const struct in_addr *addrp)
-{
- static char buf[20];
- const unsigned char *bytep;
-
- bytep = (const unsigned char *) &(addrp->s_addr);
- sprintf(buf, "%d.%d.%d.%d", bytep[0], bytep[1], bytep[2], bytep[3]);
- return buf;
-}
-
-static char *
-addr_to_host(const struct in_addr *addr)
-{
- struct hostent *host;
-
- if ((host = gethostbyaddr((char *) addr,
- sizeof(struct in_addr), AF_INET)) != NULL)
- return (char *) host->h_name;
-
- return (char *) NULL;
-}
-
-static char *
-addr_to_network(const struct in_addr *addr)
-{
- struct netent *net;
-
- if ((net = getnetbyaddr((long) ntohl(addr->s_addr), AF_INET)) != NULL)
- return (char *) net->n_name;
-
- return (char *) NULL;
-}
-
-static char *
-addr_to_anyname(const struct in_addr *addr)
-{
- char *name;
-
- if ((name = addr_to_host(addr)) != NULL ||
- (name = addr_to_network(addr)) != NULL)
- return name;
-
- return addr_to_dotted(addr);
-}
-
-static char *
-mask_to_dotted(const struct in_addr *mask)
-{
- int i;
- static char buf[22];
- u_int32_t maskaddr, bits;
-
- maskaddr = ntohl(mask->s_addr);
-
- if (maskaddr == 0xFFFFFFFFL)
- /* we don't want to see "/32" */
- return "";
-
- i = 32;
- bits = 0xFFFFFFFEL;
- while (--i >= 0 && maskaddr != bits)
- bits <<= 1;
- if (i >= 0)
- sprintf(buf, "/%d", i);
- else
- /* mask was not a decent combination of 1's and 0's */
- snprintf(buf, sizeof(buf), "/%s", addr_to_dotted(mask));
-
- return buf;
-}
-
static bool need_devaddr(struct arpt_devaddr_info *info)
{
int i;
@@ -403,7 +331,6 @@ static void nft_arp_print_rule_details(const struct iptables_command_state *cs,
unsigned int format)
{
const struct arpt_entry *fw = &cs->arp;
- char buf[BUFSIZ];
char iface[IFNAMSIZ+2];
const char *sep = "";
int print_iface = 0;
@@ -450,15 +377,10 @@ static void nft_arp_print_rule_details(const struct iptables_command_state *cs,
}
if (fw->arp.smsk.s_addr != 0L) {
- printf("%s%s", sep, fw->arp.invflags & IPT_INV_SRCIP
- ? "! " : "");
- if (format & FMT_NUMERIC)
- sprintf(buf, "%s", addr_to_dotted(&(fw->arp.src)));
- else
- sprintf(buf, "%s", addr_to_anyname(&(fw->arp.src)));
- strncat(buf, mask_to_dotted(&(fw->arp.smsk)),
- sizeof(buf) - strlen(buf) - 1);
- printf("-s %s", buf);
+ printf("%s%s-s %s", sep,
+ fw->arp.invflags & IPT_INV_SRCIP ? "! " : "",
+ ipv4_addr_to_string(&fw->arp.src,
+ &fw->arp.smsk, format));
sep = " ";
}
@@ -476,15 +398,10 @@ static void nft_arp_print_rule_details(const struct iptables_command_state *cs,
after_devsrc:
if (fw->arp.tmsk.s_addr != 0L) {
- printf("%s%s", sep, fw->arp.invflags & IPT_INV_DSTIP
- ? "! " : "");
- if (format & FMT_NUMERIC)
- sprintf(buf, "%s", addr_to_dotted(&(fw->arp.tgt)));
- else
- sprintf(buf, "%s", addr_to_anyname(&(fw->arp.tgt)));
- strncat(buf, mask_to_dotted(&(fw->arp.tmsk)),
- sizeof(buf) - strlen(buf) - 1);
- printf("-d %s", buf);
+ printf("%s%s-d %s", sep,
+ fw->arp.invflags & IPT_INV_DSTIP ? "! " : "",
+ ipv4_addr_to_string(&fw->arp.tgt,
+ &fw->arp.tmsk, format));
sep = " ";
}
diff --git a/iptables/xshared.c b/iptables/xshared.c
index 71f689901e1d4..9a1f465a5a6d3 100644
--- a/iptables/xshared.c
+++ b/iptables/xshared.c
@@ -550,9 +550,9 @@ void debug_print_argv(struct argv_store *store)
}
#endif
-static const char *ipv4_addr_to_string(const struct in_addr *addr,
- const struct in_addr *mask,
- unsigned int format)
+const char *ipv4_addr_to_string(const struct in_addr *addr,
+ const struct in_addr *mask,
+ unsigned int format)
{
static char buf[BUFSIZ];
diff --git a/iptables/xshared.h b/iptables/xshared.h
index 9159b2b1f3768..1e86aba8b2375 100644
--- a/iptables/xshared.h
+++ b/iptables/xshared.h
@@ -206,6 +206,9 @@ void debug_print_argv(struct argv_store *store);
# define debug_print_argv(...) /* nothing */
#endif
+const char *ipv4_addr_to_string(const struct in_addr *addr,
+ const struct in_addr *mask,
+ unsigned int format);
void print_ipv4_addresses(const struct ipt_entry *fw, unsigned int format);
void print_ipv6_addresses(const struct ip6t_entry *fw6, unsigned int format);
--
2.31.1

43
iptables.init
View File

@ -55,11 +55,6 @@ if [ ! -x /sbin/$IPTABLES ]; then
exit 5
fi
# Old or new modutils
/sbin/modprobe --version 2>&1 | grep -q 'kmod version' \
&& NEW_MODUTILS=1 \
|| NEW_MODUTILS=0
# Default firewall configuration:
IPTABLES_MODULES=""
IPTABLES_SAVE_ON_STOP="no"
@ -75,13 +70,33 @@ IPTABLES_RESTORE_WAIT_INTERVAL=1000000
# Load firewall configuration.
[ -f "$IPTABLES_CONFIG" ] && . "$IPTABLES_CONFIG"
is_iptables_nft() {
iptables --version | grep -q '(nf_tables)'
}
netfilter_active() {
is_iptables_nft && return 0
[ -e "$PROC_IPTABLES_NAMES" ]
}
netfilter_tables() {
netfilter_active || return 1
is_iptables_nft && {
# explicitly omit security table from this list as
# it should be reserved for SELinux use
echo "raw mangle filter nat"
return 0
}
cat "$PROC_IPTABLES_NAMES" 2>/dev/null
}
# Get active tables
NF_TABLES=$(cat "$PROC_IPTABLES_NAMES" 2>/dev/null)
NF_TABLES=$(netfilter_tables)
flush_n_delete() {
# Flush firewall rules and delete chains.
[ ! -e "$PROC_IPTABLES_NAMES" ] && return 0
netfilter_active || return 0
# Check if firewall is configured (has tables)
[ -z "$NF_TABLES" ] && return 1
@ -113,10 +128,10 @@ set_policy() {
policy=$1
# Check if iptable module is loaded
[ ! -e "$PROC_IPTABLES_NAMES" ] && return 0
netfilter_active || return 0
# Check if firewall is configured (has tables)
tables=$(cat "$PROC_IPTABLES_NAMES" 2>/dev/null)
tables=$(netfilter_tables)
[ -z "$tables" ] && return 1
echo -n $"${IPTABLES}: Setting chains to policy $policy: "
@ -166,7 +181,7 @@ load_sysctl() {
echo -n $"Loading sysctl settings: "
ret=0
for item in $IPTABLES_SYSCTL_LOAD_LIST; do
fgrep -hs $item /etc/sysctl.d/* | sysctl -p - >/dev/null
fgrep -hs $item /etc/sysctl.d/*.conf | sysctl -p - >/dev/null
let ret+=$?;
done
[ $ret -eq 0 ] && success || failure
@ -240,7 +255,7 @@ start() {
stop() {
# Do not stop if iptables module is not loaded.
[ ! -e "$PROC_IPTABLES_NAMES" ] && return 0
netfilter_active || return 0
# Set default chain policy to ACCEPT, in order to not break shutdown
# on systems where the default policy is DROP and root device is
@ -255,7 +270,7 @@ stop() {
save() {
# Check if iptable module is loaded
if [ ! -e "$PROC_IPTABLES_NAMES" ]; then
if ! netfilter_active; then
echo -n $"${IPTABLES}: Nothing to save."; warning; echo
return 0
fi
@ -298,7 +313,7 @@ save() {
}
status() {
if [ ! -f "$VAR_SUBSYS_IPTABLES" -a -z "$NF_TABLES" ]; then
if [ ! -f "$VAR_SUBSYS_IPTABLES" ]; then
echo $"${IPTABLES}: Firewall is not running."
return 3
fi
@ -306,7 +321,7 @@ status() {
# Do not print status if lockfile is missing and iptables modules are not
# loaded.
# Check if iptable modules are loaded
if [ ! -e "$PROC_IPTABLES_NAMES" ]; then
if ! netfilter_active; then
echo $"${IPTABLES}: Firewall modules are not loaded."
return 3
fi

30
iptables.spec
View File

@ -11,7 +11,7 @@ Name: iptables
Summary: Tools for managing Linux kernel packet filtering capabilities
URL: https://www.netfilter.org/projects/iptables
Version: 1.8.7
Release: 10%{?dist}
Release: 11%{?dist}
Source: %{url}/files/%{name}-%{version}.tar.bz2
Source1: iptables.init
Source2: iptables-config
@ -25,10 +25,13 @@ Source9: ebtables.service
Source10: ebtables-config
Patch1: 0001-ebtables-Exit-gracefully-on-invalid-table-names.patch
Patch2: 0002-xtables-translate-Fix-translation-of-odd-netmasks.patch
Patch3: 0003-Eliminate-inet_aton-and-inet_ntoa.patch
Patch4: 0004-nft-arp-Make-use-of-ipv4_addr_to_string.patch
# pf.os: ISC license
# iptables-apply: Artistic Licence 2.0
License: GPLv2 and Artistic Licence 2.0 and ISC
# iptables-apply: Artistic 2.0
License: GPLv2 and Artistic 2.0 and ISC
# libnetfilter_conntrack is needed for xt_connlabel
BuildRequires: pkgconfig(libnetfilter_conntrack)
@ -62,6 +65,7 @@ Requires: %{name}-libs%{?_isa} = %{version}-%{release}
Conflicts: setup < 2.10.4-1
Requires(post): %{_sbindir}/update-alternatives
Requires(postun): %{_sbindir}/update-alternatives
Obsoletes: %{name} < %{version}-%{release}
%if 0%{?rhel} < 9
Provides: iptables
%endif
@ -84,6 +88,7 @@ and logic for those is kept in per-extension shared object files.
%package legacy-libs
Summary: iptables legacy libraries
Obsoletes: %{name}-libs < %{version}-%{release}
%description legacy-libs
iptables libraries.
@ -418,6 +423,17 @@ fi
%changelog
* Wed May 12 2021 Phil Sutter <psutter@redhat.com> - 1.8.7-11
- Fix License name in spec file
- Eliminate inet_aton() and inet_ntoa()
- nft-arp: Make use of ipv4_addr_to_string()
- Make legacy sub-packages obsolete older non-legacy ones
- Fix dates in changelog
- iptables.init: Fix functionality for iptables-nft
- iptables.init: Ignore sysctl files not suffixed '.conf'
- iptables.init: Drop unused NEW_MODUTILS check
- iptables.init: Drop some trailing whitespace
* Fri Apr 23 2021 Phil Sutter <psutter@redhat.com> - 1.8.7-10
- Add provides to iptables-nft-services
@ -460,13 +476,13 @@ fi
* Sat Jan 16 2021 Kevin Fenzi <kevin@scrye.com> - 1.8.7-1
- Update to 1.8.7. Fixes rhbz#1916948
* Thu Nov 19 17:32:24 CET 2020 Tom Stellard <tstellar@redhat.com> - 1.8.6-5
* Thu Nov 19 2020 Tom Stellard <tstellar@redhat.com> - 1.8.6-5
- Use make macros
* Tue Nov 17 14:05:30 CET 2020 Phil Sutter <psutter@redhat.com> - 1.8.6-4
* Tue Nov 17 2020 Phil Sutter <psutter@redhat.com> - 1.8.6-4
- ebtables: Fix for broken chain renaming
* Mon Nov 16 13:39:22 CET 2020 Phil Sutter <psutter@redhat.com> - 1.8.6-3
* Mon Nov 16 2020 Phil Sutter <psutter@redhat.com> - 1.8.6-3
- Drop obsolete StandardOutput setting from unit file
- Remove StandardError setting from unit file, its value is default
@ -476,7 +492,7 @@ fi
* Sat Oct 31 2020 Kevin Fenzi <kevin@scrye.com> - 1.8.6-1
- Update to 1.8.6. Fixes bug #1893453
* Tue Aug 25 15:56:10 GMT 2020 Phil Sutter <psutter@redhat.com> - 1.8.5-3
* Tue Aug 25 2020 Phil Sutter <psutter@redhat.com> - 1.8.5-3
- nft: cache: Check consistency with NFT_CL_FAKE, too
- nft: Fix command name in ip6tables error message