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/rcpthosts.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 src/rcpthosts.c

(limited to 'src/rcpthosts.c')

diff --git a/src/rcpthosts.c b/src/rcpthosts.c
new file mode 100644
index 0000000..2242249
--- /dev/null
+++ b/src/rcpthosts.c
@@ -0,0 +1,70 @@
+#include "cdbread.h"
+#include "byte.h"
+#include "open.h"
+#include "error.h"
+#include "exit.h"
+#include "control.h"
+#include "constmap.h"
+#include "stralloc.h"
+#include "case.h"
+#include "close.h"
+#include "fd.h"
+#include "rcpthosts.h"
+
+static int flagrh = 0;
+static int flagmrh = 0;
+static stralloc rh = {0};
+static struct constmap maprh;
+static int fdmrh;
+
+static struct cdb cdb;
+
+int rcpthosts_init()
+{
+  flagrh = control_readfile(&rh,"control/rcpthosts",0);
+  if (flagrh != 1) return flagrh;
+  if (!constmap_init(&maprh,rh.s,rh.len,0)) return flagrh = -1;
+  fdmrh = open_read("control/morercpthosts.cdb");
+  if (fdmrh == -1) if (errno != ENOENT) return flagmrh = -1;
+  if (fdmrh > 0) flagmrh = 1;
+  return 0;
+}
+
+static stralloc host = {0};
+
+int rcpthosts(char *buf, int len)
+{
+  int j;
+  int r;
+
+  if (flagrh != 1) return 1;
+
+  j = byte_rchr(buf,len,'@');
+  if (j >= len) return 1; /* presumably envnoathost is acceptable */
+
+  ++j; buf += j; len -= j;
+
+  if (!stralloc_copyb(&host,buf,len)) return -1;
+  buf = host.s;
+  case_lowerb(buf,len);
+
+  for (j = 0; j < len; ++j)
+    if (!j || (buf[j] == '.'))
+      if (constmap(&maprh,buf + j,len - j)) return 1;
+
+  if (flagmrh == 1) {
+    fdmrh = open_read("control/morercpthosts.cdb");
+    if (fdmrh == -1) if (errno == ENOENT) return 0;
+    cdb_init(&cdb,fdmrh);
+
+    for (j = 0; j < len ;++j)
+      if (!j || (buf[j] == '.')) {
+        r = cdb_find(&cdb,buf + j,len - j);
+        if (r) { cdb_free(&cdb); close(fdmrh);  return r; }
+      }
+    cdb_free(&cdb);
+    close(fdmrh);
+  }
+
+  return 0;
+}
-- 
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