Squashed 'third_party/lksctp-tools/' content from commit 200eca7f1
Change-Id: I8f7575513f114b205178cac5c6b3706f3d725cb5
git-subtree-dir: third_party/lksctp-tools
git-subtree-split: 200eca7f1419b1ae53958b51e8551f7e7f6cd467
diff --git a/src/lib/bindx.c b/src/lib/bindx.c
new file mode 100644
index 0000000..5f44874
--- /dev/null
+++ b/src/lib/bindx.c
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+/* SCTP kernel Implementation: User API extensions.
+ *
+ * bindx.c
+ *
+ * Distributed under the terms of the LGPL v2.1 as described in
+ * http://www.gnu.org/copyleft/lesser.txt
+ *
+ * This file is part of the user library that offers support for the
+ * SCTP kernel Implementation. The main purpose of this
+ * code is to provide the SCTP Socket API mappings for user
+ * application to interface with the SCTP in kernel.
+ *
+ * This implementation is based on the Socket API Extensions for SCTP
+ * defined in <draft-ietf-tsvwg-sctpsocket-10.txt.
+ *
+ * (C) Copyright IBM Corp. 2001, 2003
+ * Copyright (c) 2002 Intel Corporation.
+ *
+ * Written or modified by:
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Daisy Chang <daisyc@us.ibm.com>
+ * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ */
+
+#include <sys/socket.h> /* struct sockaddr_storage, setsockopt() */
+#include <netinet/in.h>
+#include <netinet/sctp.h> /* SCTP_SOCKOPT_BINDX_* */
+#include <errno.h>
+
+/* Support the sctp_bindx() interface.
+ *
+ * See Sockets API Extensions for SCTP. Section 8.1.
+ *
+ * Instead of implementing through a socket call in sys_socketcall(),
+ * tunnel the request through setsockopt().
+ */
+int
+sctp_bindx(int fd, struct sockaddr *addrs, int addrcnt, int flags)
+{
+ int setsock_option = 0;
+ const char *addrbuf;
+ struct sockaddr *sa_addr;
+ socklen_t addrs_size = 0;
+ int i;
+
+ switch (flags) {
+ case SCTP_BINDX_ADD_ADDR:
+ setsock_option = SCTP_SOCKOPT_BINDX_ADD;
+ break;
+ case SCTP_BINDX_REM_ADDR:
+ setsock_option = SCTP_SOCKOPT_BINDX_REM;
+ break;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+
+ addrbuf = (char*)addrs;
+ for (i = 0; i < addrcnt; i++) {
+ sa_addr = (struct sockaddr *)addrbuf;
+ switch (sa_addr->sa_family) {
+ case AF_INET:
+ addrs_size += sizeof(struct sockaddr_in);
+ addrbuf += sizeof(struct sockaddr_in);
+ break;
+ case AF_INET6:
+ addrs_size += sizeof(struct sockaddr_in6);
+ addrbuf += sizeof(struct sockaddr_in6);
+ break;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+ }
+
+ return setsockopt(fd, SOL_SCTP, setsock_option, addrs, addrs_size);
+}