REORG: sock: start to move some generic socket code to sock.c
The new file sock.c will contain generic code for standard sockets
relying on file descriptors. We currently have way too much duplication
between proto_uxst, proto_tcp, proto_sockpair and proto_udp.
For now only get_src, get_dst and sock_create_server_socket were moved,
and are used where appropriate.
diff --git a/src/sock.c b/src/sock.c
new file mode 100644
index 0000000..2eb4b6f
--- /dev/null
+++ b/src/sock.c
@@ -0,0 +1,85 @@
+/*
+ * Generic code for native (BSD-compatible) sockets
+ *
+ * Copyright 2000-2020 Willy Tarreau <w@1wt.eu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+
+#include <haproxy/api.h>
+#include <haproxy/connection.h>
+#include <haproxy/namespace.h>
+#include <haproxy/sock.h>
+#include <haproxy/tools.h>
+
+
+/* Create a socket to connect to the server in conn->dst (which MUST be valid),
+ * using the configured namespace if needed, or the one passed by the proxy
+ * protocol if required to do so. It ultimately calls socket() or socketat()
+ * and returns the FD or error code.
+ */
+int sock_create_server_socket(struct connection *conn)
+{
+ const struct netns_entry *ns = NULL;
+
+#ifdef USE_NS
+ if (objt_server(conn->target)) {
+ if (__objt_server(conn->target)->flags & SRV_F_USE_NS_FROM_PP)
+ ns = conn->proxy_netns;
+ else
+ ns = __objt_server(conn->target)->netns;
+ }
+#endif
+ return my_socketat(ns, conn->dst->ss_family, SOCK_STREAM, 0);
+}
+
+/*
+ * Retrieves the source address for the socket <fd>, with <dir> indicating
+ * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
+ * success, -1 in case of error. The socket's source address is stored in
+ * <sa> for <salen> bytes.
+ */
+int sock_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
+{
+ if (dir)
+ return getsockname(fd, sa, &salen);
+ else
+ return getpeername(fd, sa, &salen);
+}
+
+/*
+ * Retrieves the original destination address for the socket <fd>, with <dir>
+ * indicating if we're a listener (=0) or an initiator (!=0). It returns 0 in
+ * case of success, -1 in case of error. The socket's source address is stored
+ * in <sa> for <salen> bytes.
+ */
+int sock_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
+{
+ if (dir)
+ return getpeername(fd, sa, &salen);
+ else
+ return getsockname(fd, sa, &salen);
+}
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * End:
+ */