From 89b7b67a13ebb7965cc7f13ad0595e2194a2d34c Mon Sep 17 00:00:00 2001
From: Jannis Hoffmann <jannis@fehcom.de>
Date: Wed, 3 Jul 2024 15:48:04 +0200
Subject: add sqmail-4.2.29a

---
 src/ipme.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/ipme.c

(limited to 'src/ipme.c')

diff --git a/src/ipme.c b/src/ipme.c
new file mode 100644
index 0000000..ba19722
--- /dev/null
+++ b/src/ipme.c
@@ -0,0 +1,95 @@
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <ifaddrs.h>
+#ifndef SIOCGIFCONF /* whatever works */
+#include <sys/sockio.h>
+#endif
+#include "hassalen.h"
+#include "byte.h"
+#include "ip.h"
+#include "ipalloc.h"
+#include "stralloc.h"
+#include "ipme.h"
+
+/** @file ipme.c
+    @brief ipme_is4, ipme_is6, ipme_is46, ipme_init
+ */
+
+static int ipmeok = 0;
+ipalloc ipme = {0};
+
+int ipme_is4(struct ip4_address *ip)
+{
+  int i;
+
+  if (ipme_init() != 1) return -1;
+
+  for (i = 0; i < ipme.len; ++i)
+    if (ipme.ix[i].af == AF_INET && byte_equal(&ipme.ix[i].addr,4,ip))
+      return 1;
+  return 0;
+}
+
+int ipme_is6(struct ip6_address *ip)
+{
+  int i;
+
+  if (ipme_init() != 1) return -1;
+
+  for (i = 0; i < ipme.len; ++i)
+    if (ipme.ix[i].af == AF_INET6 && byte_equal(&ipme.ix[i].addr,16,ip))
+      return 1;
+  return 0;
+}
+
+int ipme_is(struct ip_mx *mxip)
+{
+  switch (mxip->af) {
+    case AF_INET:  return ipme_is4(&mxip->addr.ip4);
+    case AF_INET6: return ipme_is6(&mxip->addr.ip6);
+  }
+  return 0;
+}
+
+/* @brief ipme_init uses now getifaddrs() instead of ioctl calls */
+
+int ipme_init()
+{
+  struct ifaddrs *ifap, *ifa;
+  struct sockaddr_in *sin;
+  struct sockaddr_in6 *sin6;
+  struct ip_mx ix;
+
+  if (ipmeok) return 1;
+  if (!ipalloc_readyplus(&ipme,0)) return 0;
+  ipme.len = 0;
+  ix.pref = 0;
+
+  if (getifaddrs(&ifap)) return 0;
+
+  for (ifa = ifap; ifa; ifa = ifa->ifa_next) 
+    if (ifa->ifa_addr) {
+      if (ifa->ifa_addr->sa_family == AF_INET) {
+        sin = (struct sockaddr_in *) ifa->ifa_addr;
+        byte_copy(&ix.addr.ip4,4,&sin->sin_addr);
+        ix.af = AF_INET;
+        if (!ipalloc_append(&ipme,&ix)) return 0; 
+      }
+      if (ifa->ifa_addr->sa_family == AF_INET6) {
+        sin6 = (struct sockaddr_in6 *) ifa->ifa_addr;
+        byte_copy(&ix.addr.ip6,16,&sin6->sin6_addr);
+        ix.af = AF_INET6;
+        if (!ipalloc_append(&ipme,&ix)) return 0; 
+       }
+    }
+
+  freeifaddrs(ifap);
+  ipmeok = 1;
+
+  return 1;
+}
-- 
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