1 files changed, 119 insertions, 0 deletions
diff --git a/fake-getaddrinfo.c b/fake-getaddrinfo.c
new file mode 100644
index 00000000..b918798c
--- /dev/null
+++ b/fake-getaddrinfo.c
@@ -0,0 +1,119 @@
+/*
+ * fake library for ssh
+ *
+ * This file includes getaddrinfo(), freeaddrinfo() and gai_strerror().
+ * These funtions are defined in rfc2133.
+ *
+ * But these functions are not implemented correctly. The minimum subset
+ * is implemented for ssh use only. For exapmle, this routine assumes
+ * that ai_family is AF_INET. Don't use it for another purpose.
+ * 
+ * In the case not using 'configure --enable-ipv6', this getaddrinfo.c
+ * will be used if you have broken getaddrinfo or no getaddrinfo.
+ */
+
+#include "includes.h"
+#include "ssh.h"
+
+#ifndef HAVE_GAI_STRERROR
+char *
+gai_strerror(ecode)
+int ecode;
+{
+  switch (ecode) {
+  case EAI_NODATA:
+    return "no address associated with hostname.";
+  case EAI_MEMORY:
+    return "memory allocation failure.";
+  default:
+    return "unknown error.";
+  }
+}    
+#endif /* !HAVE_GAI_STRERROR */
+
+#ifndef HAVE_FREEADDRINFO
+void
+freeaddrinfo(ai)
+struct addrinfo *ai;
+{
+  struct addrinfo *next;
+  
+  do {
+    next = ai->ai_next;
+    free(ai);
+  } while (ai = next);
+}
+#endif /* !HAVE_FREEADDRINFO */
+
+#ifndef HAVE_GETADDRINFO
+static struct addrinfo *
+malloc_ai(port, addr)
+int port;
+u_long addr;
+{
+  struct addrinfo *ai;
+
+  if (ai = (struct addrinfo *)malloc(sizeof(struct addrinfo) +
+				     sizeof(struct sockaddr_in))) {
+    memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
+    ai->ai_addr = (struct sockaddr *)(ai + 1);
+    /* XXX -- ssh doesn't use sa_len */
+    ai->ai_addrlen = sizeof(struct sockaddr_in);
+    ai->ai_addr->sa_family = ai->ai_family = AF_INET;
+    ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
+    ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
+    return ai;
+  } else {
+    return NULL;
+  }
+}
+
+int
+getaddrinfo(hostname, servname, hints, res)
+const char *hostname, *servname;
+const struct addrinfo *hints;
+struct addrinfo **res;
+{
+  struct addrinfo *cur, *prev = NULL;
+  struct hostent *hp;
+  int i, port;
+  
+  if (servname)
+    port = htons(atoi(servname));
+  else
+    port = 0;
+  if (hints && hints->ai_flags & AI_PASSIVE)
+    if (*res = malloc_ai(port, htonl(0x00000000)))
+      return 0;
+    else
+      return EAI_MEMORY;
+  if (!hostname)
+    if (*res = malloc_ai(port, htonl(0x7f000001)))
+      return 0;
+    else
+      return EAI_MEMORY;
+  if (inet_addr(hostname) != -1)
+    if (*res = malloc_ai(port, inet_addr(hostname)))
+      return 0;
+    else
+      return EAI_MEMORY;
+  if ((hp = gethostbyname(hostname)) &&
+      hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
+    for (i = 0; hp->h_addr_list[i]; i++)
+      if (cur = malloc_ai(port,
+			  ((struct in_addr *)hp->h_addr_list[i])->s_addr)) {
+	if (prev)
+	  prev->ai_next = cur;
+	else
+	  *res = cur;
+	prev = cur;
+      } else {
+	if (*res)
+	  freeaddrinfo(*res);
+	return EAI_MEMORY;
+      }
+    return 0;
+  }
+  return EAI_NODATA;
+}
+#endif /* !HAVE_GETADDRINFO */