--- /dev/null
+#include <string.h>
+#include "config.h"
+
+/**
+ * net - simple IPv4/IPv6 client library
+ *
+ * This code makes it simple to support IPv4 and IPv6 without speed penalty.
+ *
+ * License: MIT
+ *
+ * Author: Rusty Russell <rusty@rustcorp.com.au>
+ *
+ * Example:
+ * #include <ccan/net/net.h>
+ * #include <sys/types.h>
+ * #include <sys/socket.h>
+ * #include <stdio.h>
+ * #include <err.h>
+ *
+ * int main(int argc, char *argv[])
+ * {
+ * struct addrinfo *addr;
+ * const char *dest, *port;
+ * int fd;
+ * struct sockaddr saddr;
+ * socklen_t slen = sizeof(saddr);
+ *
+ * if (argc == 2) {
+ * dest = argv[1];
+ * port = "http";
+ * } else if (argc == 3) {
+ * dest = argv[1];
+ * port = argv[2];
+ * } else
+ * errx(1, "Usage: test-net <target> [<port>]");
+ *
+ * addr = net_client_lookup(dest, port, AF_UNSPEC, SOCK_STREAM);
+ * if (!addr)
+ * err(1, "Failed to look up %s", dest);
+ *
+ * fd = net_connect(addr);
+ * if (fd < 0)
+ * err(1, "Failed to connect to %s", dest);
+ *
+ * if (getsockname(fd, &saddr, &slen) == 0)
+ * printf("Connected via %s\n",
+ * saddr.sa_family == AF_INET6 ? "IPv6"
+ * : saddr.sa_family == AF_INET ? "IPv4"
+ * : "UNKNOWN??");
+ * else
+ * err(1, "Failed to get socket type for connection");
+ * return 0;
+ * }
+ */
+int main(int argc, char *argv[])
+{
+ /* Expect exactly one argument */
+ if (argc != 2)
+ return 1;
+
+ if (strcmp(argv[1], "depends") == 0) {
+ printf("ccan/noerr\n");
+ return 0;
+ }
+
+ return 1;
+}