Merge tag 'debian/1.8.5p2-1' into squeeze

[debian/sudo] / compat / getaddrinfo.h

diff --git a/compat/getaddrinfo.h b/compat/getaddrinfo.h
new file mode 100644 (file)
index 0000000..a8a4b69
--- /dev/null
+++ b/compat/getaddrinfo.h
@@ -0,0 +1,75 @@
+/*
+ * Replacement implementation of getaddrinfo.
+ *
+ * This is an implementation of the getaddrinfo family of functions for
+ * systems that lack it, so that code can use getaddrinfo always.  It provides
+ * IPv4 support only; for IPv6 support, a native getaddrinfo implemenation is
+ * required.
+ *
+ * The canonical version of this file is maintained in the rra-c-util package,
+ * which can be found at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+ *
+ * Written by Russ Allbery <rra@stanford.edu>
+ *
+ * The authors hereby relinquish any claim to any copyright that they may have
+ * in this work, whether granted under contract or by operation of law or
+ * international treaty, and hereby commit to the public, at large, that they
+ * shall not, at any time in the future, seek to enforce any copyright in this
+ * work against any person or entity, or prevent any person or entity from
+ * copying, publishing, distributing or creating derivative works of this
+ * work.
+ */
+
+#ifndef _COMPAT_GETADDRINFO_H
+#define _COMPAT_GETADDRINFO_H
+
+#include <config.h>
+
+/* Skip this entire file if a system getaddrinfo was detected. */
+#ifndef HAVE_GETADDRINFO
+
+/* OpenBSD likes to have sys/types.h included before sys/socket.h. */
+#include <sys/types.h>
+#include <sys/socket.h>
+
+/* The struct returned by getaddrinfo, from RFC 3493. */
+struct addrinfo {
+    int ai_flags;               /* AI_PASSIVE, AI_CANONNAME, .. */
+    int ai_family;              /* AF_xxx */
+    int ai_socktype;            /* SOCK_xxx */
+    int ai_protocol;            /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
+    socklen_t ai_addrlen;       /* Length of ai_addr */
+    char *ai_canonname;         /* Canonical name for nodename */
+    struct sockaddr *ai_addr;   /* Binary address */
+    struct addrinfo *ai_next;   /* Next structure in linked list */
+};
+
+/* Constants for ai_flags from RFC 3493, combined with binary or. */
+#define AI_PASSIVE      0x0001
+#define AI_CANONNAME    0x0002
+#define AI_NUMERICHOST  0x0004
+#define AI_NUMERICSERV  0x0008
+#define AI_V4MAPPED     0x0010
+#define AI_ALL          0x0020
+#define AI_ADDRCONFIG   0x0040
+
+/* Error return codes from RFC 3493. */
+#define EAI_AGAIN       1       /* Temporary name resolution failure */
+#define EAI_BADFLAGS    2       /* Invalid value in ai_flags parameter */
+#define EAI_FAIL        3       /* Permanent name resolution failure */
+#define EAI_FAMILY      4       /* Address family not recognized */
+#define EAI_MEMORY      5       /* Memory allocation failure */
+#define EAI_NONAME      6       /* nodename or servname unknown */
+#define EAI_SERVICE     7       /* Service not recognized for socket type */
+#define EAI_SOCKTYPE    8       /* Socket type not recognized */
+#define EAI_SYSTEM      9       /* System error occurred, see errno */
+#define EAI_OVERFLOW    10      /* An argument buffer overflowed */
+
+/* Function prototypes. */
+int getaddrinfo(const char *nodename, const char *servname,
+                const struct addrinfo *hints, struct addrinfo **res);
+void freeaddrinfo(struct addrinfo *ai);
+const char *gai_strerror(int ecode);
+
+#endif /* !HAVE_GETADDRINFO */
+#endif /* _COMPAT_GETADDRINFO_H */