From 0e5b2871ca6456b01d4bf037a6e68badf1ff1a41 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henryk=20Pl=C3=B6tz?= <henryk@ploetzli.ch>
Date: Fri, 3 Oct 2014 19:58:52 +0200
Subject: Initial commit of djbdns-1.05.tar.gz Source was
 http://cr.yp.to/djbdns/djbdns-1.05.tar.gz, SHA1
 2efdb3a039d0c548f40936aa9cb30829e0ce8c3d

---
 roots.c | 127 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 roots.c

(limited to 'roots.c')

diff --git a/roots.c b/roots.c
new file mode 100644
index 0000000..3cfe959
--- /dev/null
+++ b/roots.c
@@ -0,0 +1,127 @@
+#include <unistd.h>
+#include "open.h"
+#include "error.h"
+#include "str.h"
+#include "byte.h"
+#include "error.h"
+#include "direntry.h"
+#include "ip4.h"
+#include "dns.h"
+#include "openreadclose.h"
+#include "roots.h"
+
+static stralloc data;
+
+static int roots_find(char *q)
+{
+  int i;
+  int j;
+
+  i = 0;
+  while (i < data.len) {
+    j = dns_domain_length(data.s + i);
+    if (dns_domain_equal(data.s + i,q)) return i + j;
+    i += j;
+    i += 64;
+  }
+  return -1;
+}
+
+static int roots_search(char *q)
+{
+  int r;
+
+  for (;;) {
+    r = roots_find(q);
+    if (r >= 0) return r;
+    if (!*q) return -1; /* user misconfiguration */
+    q += *q;
+    q += 1;
+  }
+}
+
+int roots(char servers[64],char *q)
+{
+  int r;
+  r = roots_find(q);
+  if (r == -1) return 0;
+  byte_copy(servers,64,data.s + r);
+  return 1;
+}
+
+int roots_same(char *q,char *q2)
+{
+  return roots_search(q) == roots_search(q2);
+}
+
+static int init2(DIR *dir)
+{
+  direntry *d;
+  const char *fqdn;
+  static char *q;
+  static stralloc text;
+  char servers[64];
+  int serverslen;
+  int i;
+  int j;
+
+  for (;;) {
+    errno = 0;
+    d = readdir(dir);
+    if (!d) {
+      if (errno) return 0;
+      return 1;
+    }
+
+    if (d->d_name[0] != '.') {
+      if (openreadclose(d->d_name,&text,32) != 1) return 0;
+      if (!stralloc_append(&text,"\n")) return 0;
+
+      fqdn = d->d_name;
+      if (str_equal(fqdn,"@")) fqdn = ".";
+      if (!dns_domain_fromdot(&q,fqdn,str_len(fqdn))) return 0;
+
+      serverslen = 0;
+      j = 0;
+      for (i = 0;i < text.len;++i)
+	if (text.s[i] == '\n') {
+	  if (serverslen <= 60)
+	    if (ip4_scan(text.s + j,servers + serverslen))
+	      serverslen += 4;
+	  j = i + 1;
+	}
+      byte_zero(servers + serverslen,64 - serverslen);
+
+      if (!stralloc_catb(&data,q,dns_domain_length(q))) return 0;
+      if (!stralloc_catb(&data,servers,64)) return 0;
+    }
+  }
+}
+
+static int init1(void)
+{
+  DIR *dir;
+  int r;
+
+  if (chdir("servers") == -1) return 0;
+  dir = opendir(".");
+  if (!dir) return 0;
+  r = init2(dir);
+  closedir(dir);
+  return r;
+}
+
+int roots_init(void)
+{
+  int fddir;
+  int r;
+
+  if (!stralloc_copys(&data,"")) return 0;
+
+  fddir = open_read(".");
+  if (fddir == -1) return 0;
+  r = init1();
+  if (fchdir(fddir) == -1) r = 0;
+  close(fddir);
+  return r;
+}
-- 
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