From 2f392a3b91c25c94abfc9a7862d908c923f7bf2b Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Sun, 13 Apr 2014 18:41:06 +0200
Subject: [PATCH 1/1] Add support for device and direction parameters

Signed-off-by: Steven Barth <steven@midlink.org>
---
 iptables.c | 10 ++++++++++
 iptables.h |  2 ++
 options.c  | 16 ++++++++++++++++
 options.h  |  5 +++++
 rules.c    |  4 ++++
 snats.c    |  2 ++
 6 files changed, 39 insertions(+)

diff --git a/iptables.c b/iptables.c
index 694dd4f..58ec752 100644
--- a/iptables.c
+++ b/iptables.c
@@ -744,6 +744,16 @@ fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
 }
 
 void
+fw3_ipt_rule_device(struct fw3_ipt_rule *r, const char *device, bool out)
+{
+	if (device) {
+		struct fw3_device dev = { .any = false };
+		strncpy(dev.name, device, sizeof(dev.name) - 1);
+		fw3_ipt_rule_in_out(r, (out) ? NULL : &dev, (out) ? &dev : NULL);
+	}
+}
+
+void
 fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac)
 {
 	char buf[sizeof("ff:ff:ff:ff:ff:ff\0")];
diff --git a/iptables.h b/iptables.h
index d0b42d8..872ee33 100644
--- a/iptables.h
+++ b/iptables.h
@@ -143,6 +143,8 @@ void fw3_ipt_rule_src_dest(struct fw3_ipt_rule *r,
 void fw3_ipt_rule_sport_dport(struct fw3_ipt_rule *r,
                               struct fw3_port *sp, struct fw3_port *dp);
 
+void fw3_ipt_rule_device(struct fw3_ipt_rule *r, const char *device, bool out);
+
 void fw3_ipt_rule_mac(struct fw3_ipt_rule *r, struct fw3_mac *mac);
 
 void fw3_ipt_rule_icmptype(struct fw3_ipt_rule *r, struct fw3_icmptype *icmp);
diff --git a/options.c b/options.c
index 4c42be0..1dbdca8 100644
--- a/options.c
+++ b/options.c
@@ -854,6 +854,22 @@ fw3_parse_setmatch(void *ptr, const char *val, bool is_list)
 	return true;
 }
 
+bool
+fw3_parse_direction(void *ptr, const char *val, bool is_list)
+{
+	bool *is_out = ptr;
+	bool valid = true;
+
+	if (!strcmp(val, "in") || !strcmp(val, "ingress"))
+		*is_out = false;
+	else if (!strcmp(val, "out") || !strcmp(val, "egress"))
+		*is_out = true;
+	else
+		valid = false;
+
+	return valid;
+}
+
 
 bool
 fw3_parse_options(void *s, const struct fw3_option *opts,
diff --git a/options.h b/options.h
index f0a759a..30c0a95 100644
--- a/options.h
+++ b/options.h
@@ -328,6 +328,9 @@ struct fw3_rule
 	struct fw3_zone *_src;
 	struct fw3_zone *_dest;
 
+	const char *device;
+	bool direction_out;
+
 	struct fw3_device src;
 	struct fw3_device dest;
 	struct fw3_setmatch ipset;
@@ -408,6 +411,7 @@ struct fw3_snat
 
 	struct fw3_device src;
 	struct fw3_setmatch ipset;
+	const char *device;
 
 	struct list_head proto;
 
@@ -550,6 +554,7 @@ bool fw3_parse_weekdays(void *ptr, const char *val, bool is_list);
 bool fw3_parse_monthdays(void *ptr, const char *val, bool is_list);
 bool fw3_parse_mark(void *ptr, const char *val, bool is_list);
 bool fw3_parse_setmatch(void *ptr, const char *val, bool is_list);
+bool fw3_parse_direction(void *ptr, const char *val, bool is_list);
 
 bool fw3_parse_options(void *s, const struct fw3_option *opts,
                        struct uci_section *section);
diff --git a/rules.c b/rules.c
index 8ecefb0..b41dfac 100644
--- a/rules.c
+++ b/rules.c
@@ -28,6 +28,9 @@ const struct fw3_option fw3_rule_opts[] = {
 	FW3_OPT("src",                 device,    rule,     src),
 	FW3_OPT("dest",                device,    rule,     dest),
 
+	FW3_OPT("device",              string,    rule,     device),
+	FW3_OPT("direction",           direction, rule,     direction_out),
+
 	FW3_OPT("ipset",               setmatch,  rule,     ipset),
 
 	FW3_LIST("proto",              protocol,  rule,     proto),
@@ -350,6 +353,7 @@ print_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
 
 	r = fw3_ipt_rule_create(handle, proto, NULL, NULL, sip, dip);
 	fw3_ipt_rule_sport_dport(r, sport, dport);
+	fw3_ipt_rule_device(r, rule->device, rule->direction_out);
 	fw3_ipt_rule_icmptype(r, icmptype);
 	fw3_ipt_rule_mac(r, mac);
 	fw3_ipt_rule_ipset(r, &rule->ipset);
diff --git a/snats.c b/snats.c
index c7f29c6..1e01192 100644
--- a/snats.c
+++ b/snats.c
@@ -26,6 +26,7 @@ const struct fw3_option fw3_snat_opts[] = {
 	FW3_OPT("family",              family,    snat,     family),
 
 	FW3_OPT("src",                 device,    snat,     src),
+	FW3_OPT("device",              string,    snat,     device),
 
 	FW3_OPT("ipset",               setmatch,  snat,     ipset),
 
@@ -308,6 +309,7 @@ print_snat(struct fw3_ipt_handle *h, struct fw3_state *state,
 
 		r = fw3_ipt_rule_create(h, proto, NULL, NULL, src, dst);
 		fw3_ipt_rule_sport_dport(r, spt, dpt);
+		fw3_ipt_rule_device(r, snat->device, true);
 		fw3_ipt_rule_ipset(r, &snat->ipset);
 		fw3_ipt_rule_limit(r, &snat->limit);
 		fw3_ipt_rule_time(r, &snat->time);
-- 
2.11.0