net/libdnet: Use libpfctl

Several old ioctl commands have been removed in 15/main, which broke
compilation for this port. Rely on libpfctl instead.

There are some breaking pf API changes in 14 which involves regarding
the ioctl syscalls. This port is an old outdated port which explicitly
used those older syscalls. This port also is dependency of net/scapy
which is run in our CI for testing. So fix it with blanket approval.

For more information see:
https://lists.freebsd.org/archives/freebsd-pf/2023-April/000345.html

PR:		273899
Approved by:	portmgr (just-fix-it)
Sponsored by:   Rubicon Communications, LLC ("Netgate")

1 files changed, 83 insertions, 0 deletions

diff --git a/net/libdnet/files/patch-src_fw-pf.c b/net/libdnet/files/patch-src_fw-pf.c
new file mode 100644
index 000000000000..4e892f271f15
--- /dev/null
+++ b/net/libdnet/files/patch-src_fw-pf.c
@@ -0,0 +1,83 @@
+--- src/fw-pf.c.orig	2019-03-19 17:55:02 UTC
++++ src/fw-pf.c
+@@ -15,6 +15,7 @@
+ #include <net/if.h>
+ #include <netinet/in.h>
+ #include <net/pfvar.h>
++#include <libpfctl.h>
+ 
+ #include <assert.h>
+ #include <errno.h>
+@@ -115,7 +116,7 @@ static int
+ }
+ 
+ static int
+-pr_to_fr(const struct pf_rule *pr, struct fw_rule *fr)
++pr_to_fr(const struct pfctl_rule *pr, struct fw_rule *fr)
+ {
+ 	memset(fr, 0, sizeof(*fr));
+ 	
+@@ -205,12 +206,14 @@ fw_add(fw_t *fw, const struct fw_rule *rule)
+ #ifdef HAVE_PF_CHANGE_GET_TICKET
+ 	{
+ 		struct fw_rule fr;
++		struct pfctl_rule pfrule;
+ 		
+ 		if (ioctl(fw->fd, DIOCGETRULES, &pcr) < 0)
+ 			return (-1);
+ 		while ((int)--pcr.nr >= 0) {
+-			if (ioctl(fw->fd, DIOCGETRULE, &pcr) == 0 &&
+-			    pr_to_fr(&pcr.rule, &fr) == 0) {
++			if (pfctl_get_rule(fw->fd, pcr.nr, pcr.ticket, pcr.anchor,
++			    pcr.action, &pfrule, pcr.anchor_call) == 0 &&
++			    pr_to_fr(&pfrule, &fr) == 0) {
+ 				if (_fw_cmp(rule, &fr) == 0) {
+ 					errno = EEXIST;
+ 					return (-1);
+@@ -244,13 +247,15 @@ fw_delete(fw_t *fw, const struct fw_rule *rule)
+ #ifdef HAVE_PF_CHANGE_GET_TICKET
+ 	{
+ 		struct fw_rule fr;
++		struct pfctl_rule pfrule;
+ 		int found = 0;
+ 		
+ 		if (ioctl(fw->fd, DIOCGETRULES, &pcr) < 0)
+ 			return (-1);
+ 		while ((int)--pcr.nr >= 0) {
+-			if (ioctl(fw->fd, DIOCGETRULE, &pcr) == 0 &&
+-			    pr_to_fr(&pcr.rule, &fr) == 0) {
++			if (pfctl_get_rule(fw->fd, pcr.nr, pcr.ticket, pcr.anchor, 
++			    pcr.action, &pfrule, pcr.anchor_call) == 0 &&
++			    pr_to_fr(&pfrule, &fr) == 0) {
+ 				if (_fw_cmp(rule, &fr) == 0) {
+ 					found = 1;
+ 					break;
+@@ -282,6 +287,7 @@ fw_loop(fw_t *fw, fw_handler callback, void *arg)
+ fw_loop(fw_t *fw, fw_handler callback, void *arg)
+ {
+ 	struct pfioc_rule pr;
++	struct pfctl_rule pfrule;
+ 	struct fw_rule fr;
+ 	uint32_t n, max;
+ 	int ret = 0;
+@@ -292,8 +298,9 @@ fw_loop(fw_t *fw, fw_handler callback, void *arg)
+ 	
+ 	for (n = 0, max = pr.nr; n < max; n++) {
+ 		pr.nr = n;
+-		
+-		if ((ret = ioctl(fw->fd, DIOCGETRULE, &pr)) < 0)
++
++		if ((ret = pfctl_get_rule(fw->fd, pr.nr, pr.ticket, pr.anchor,
++		    pr.action, &pfrule, pr.anchor_call)) < 0)
+ 			break;
+ #ifdef PF_TABLE_NAME_SIZE
+ 		/* XXX - actually in r1.125, not 1.126 */
+@@ -301,7 +308,7 @@ fw_loop(fw_t *fw, fw_handler callback, void *arg)
+ 		    pr.rule.dst.addr.type == PF_ADDR_TABLE)
+ 			continue;
+ #endif
+-		if (pr_to_fr(&pr.rule, &fr) < 0)
++		if (pr_to_fr(&pfrule, &fr) < 0)
+ 			continue;
+ 		if ((ret = callback(&fr, arg)) != 0)
+ 			break;