vendor/krb5/1.15.1

1 files changed, 128 insertions, 0 deletions

diff --git a/src/lib/krb5/os/hostaddr.c b/src/lib/krb5/os/hostaddr.c
new file mode 100644
index 0000000000000..22f6ad6d48b9a
--- /dev/null
+++ b/src/lib/krb5/os/hostaddr.c
@@ -0,0 +1,128 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* lib/krb5/os/hostaddr.c - Return list of krb5 addresses for a hostname */
+/*
+ * Copyright 1990,1991,2008 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#include "k5-int.h"
+#include "os-proto.h"
+
+#include "fake-addrinfo.h"
+
+krb5_error_code
+k5_os_hostaddr(krb5_context context, const char *name,
+               krb5_address ***ret_addrs)
+{
+    krb5_error_code     retval;
+    krb5_address        **addrs;
+    int                 i, j, r;
+    struct addrinfo hints, *ai, *aip;
+
+    if (!name)
+        return KRB5_ERR_BAD_HOSTNAME;
+
+    memset (&hints, 0, sizeof (hints));
+    hints.ai_flags = AI_NUMERICHOST | AI_ADDRCONFIG;
+    /* We don't care what kind at this point, really, but without
+       this, we can get back multiple sockaddrs per address, for
+       SOCK_DGRAM, SOCK_STREAM, and SOCK_RAW.  I haven't checked if
+       that's what the spec indicates.  */
+    hints.ai_socktype = SOCK_DGRAM;
+
+    r = getaddrinfo (name, 0, &hints, &ai);
+    if (r && AI_NUMERICHOST != 0) {
+        hints.ai_flags &= ~AI_NUMERICHOST;
+        r = getaddrinfo (name, 0, &hints, &ai);
+    }
+    if (r)
+        return KRB5_ERR_BAD_HOSTNAME;
+
+    for (i = 0, aip = ai; aip; aip = aip->ai_next) {
+        switch (aip->ai_addr->sa_family) {
+        case AF_INET:
+        case AF_INET6:
+            i++;
+        default:
+            /* Ignore addresses of unknown families.  */
+            ;
+        }
+    }
+
+    addrs = malloc ((i+1) * sizeof(*addrs));
+    if (!addrs)
+        return ENOMEM;
+
+    for (j = 0; j < i + 1; j++)
+        addrs[j] = 0;
+
+    for (i = 0, aip = ai; aip; aip = aip->ai_next) {
+        void *ptr;
+        size_t addrlen;
+        int atype;
+
+        switch (aip->ai_addr->sa_family) {
+        case AF_INET:
+            addrlen = sizeof (struct in_addr);
+            ptr = &((struct sockaddr_in *)aip->ai_addr)->sin_addr;
+            atype = ADDRTYPE_INET;
+            break;
+        case AF_INET6:
+            addrlen = sizeof (struct in6_addr);
+            ptr = &((struct sockaddr_in6 *)aip->ai_addr)->sin6_addr;
+            atype = ADDRTYPE_INET6;
+            break;
+        default:
+            continue;
+        }
+        addrs[i] = (krb5_address *) malloc(sizeof(krb5_address));
+        if (!addrs[i]) {
+            retval = ENOMEM;
+            goto errout;
+        }
+        addrs[i]->magic = KV5M_ADDRESS;
+        addrs[i]->addrtype = atype;
+        addrs[i]->length = addrlen;
+        addrs[i]->contents = k5memdup(ptr, addrlen, &retval);
+        if (addrs[i]->contents == NULL)
+            goto errout;
+        i++;
+    }
+
+    *ret_addrs = addrs;
+    if (ai)
+        freeaddrinfo(ai);
+    return 0;
+
+errout:
+    if (addrs) {
+        for (i = 0; addrs[i]; i++) {
+            free (addrs[i]->contents);
+            free (addrs[i]);
+        }
+        krb5_free_addresses(context, addrs);
+    }
+    if (ai)
+        freeaddrinfo(ai);
+    return retval;
+
+}