endian: add constant versions.

[ccan] / ccan / net / net.h

diff --git a/ccan/net/net.h b/ccan/net/net.h
index 456ca9d6d2052b624dbc450f25b4c33d1b732d77..9ad6de56a498b12aab9a5372c9114b5def47b505 100644 (file)
--- a/ccan/net/net.h
+++ b/ccan/net/net.h
@@ -1,3 +1,4 @@
+/* Licensed under BSD-MIT - see LICENSE file for details */

 #ifndef CCAN_NET_H
 #define CCAN_NET_H
 /**
 #ifndef CCAN_NET_H
 #define CCAN_NET_H
 /**


@@ -46,4 +47,55 @@ struct addrinfo *net_client_lookup(const char *hostname,
  *     freeaddrinfo(addr);
  */
 int net_connect(const struct addrinfo *addrinfo);
  *     freeaddrinfo(addr);
  */
 int net_connect(const struct addrinfo *addrinfo);

+
+/**
+ * net_server_lookup - look up a service name to bind to.
+ * @service: the service to look up
+ * @family: Usually AF_UNSPEC, otherwise AF_INET or AF_INET6.
+ * @socktype: SOCK_DGRAM or SOCK_STREAM.
+ *
+ * This will do a synchronous lookup of a given name, returning a linked list
+ * of results, or NULL on error.  You should use freeaddrinfo() to free it.
+ *
+ * Example:
+ *     #include <sys/types.h>
+ *     #include <sys/socket.h>
+ *     #include <stdio.h>
+ *     #include <netdb.h>
+ *     #include <err.h>
+ *     ...
+ *     struct addrinfo *addr;
+ *
+ *     // Get address(es) to bind for our service.
+ *     addr = net_server_lookup("8888", AF_UNSPEC, SOCK_STREAM);
+ *     if (!addr)
+ *             errx(1, "Failed to look up 8888 to bind to");
+ */
+struct addrinfo *net_server_lookup(const char *service,
+                                  int family,
+                                  int socktype);
+
+/**
+ * net_bind - create listening socket(s)
+ * @addrinfo: the address(es) to bind to.
+ * @fds: array of two fds.
+ *
+ * This will create one (or if necessary) two sockets, mark them
+ * SO_REUSEADDR, bind them to the given address(es), and make them
+ * listen() (if the socket type is SOCK_STREAM or SOCK_SEQPACKET).
+ *
+ * Returns -1 (and sets errno) on error, or 1 or 2 depending on how many
+ * @fds are valid.
+ *
+ * Example:
+ *     int fds[2], i, num_fds;
+ *
+ *     num_fds = net_bind(addr, fds);
+ *     if (num_fds < 0)
+ *             err(1, "Failed to listen on port 8888");
+ *
+ *     for (i = 0; i < num_fds; i++)
+ *             printf(" Got fd %u/%u: %i\n", i, num_fds, fds[i]);
+ */
+int net_bind(const struct addrinfo *addrinfo, int fds[2]);

 #endif /* CCAN_NET_H */
 #endif /* CCAN_NET_H */