1 /* SCTP kernel Implementation: User API extensions.
2 *
3 * bindx.c
4 *
5 * Distributed under the terms of the LGPL v2.1 as described in
6 * http://www.gnu.org/copyleft/lesser.txt
7 *
8 * This file is part of the user library that offers support for the
9 * SCTP kernel Implementation. The main purpose of this
10 * code is to provide the SCTP Socket API mappings for user
11 * application to interface with the SCTP in kernel.
12 *
13 * This implementation is based on the Socket API Extensions for SCTP
14 * defined in <draft-ietf-tsvwg-sctpsocket-10.txt.
15 *
16 * (C) Copyright IBM Corp. 2001, 2003
17 * Copyright (c) 2002 Intel Corporation.
18 *
19 * Written or modified by:
20 * La Monte H.P. Yarroll <piggy@acm.org>
21 * Daisy Chang <daisyc@us.ibm.com>
22 * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
23 * Sridhar Samudrala <sri@us.ibm.com>
24 */
25
26 #include <sys/socket.h> /* struct sockaddr_storage, setsockopt() */
27 #include <netinet/in.h>
28 #include <netinet/sctp.h> /* SCTP_SOCKOPT_BINDX_* */
29 #include <errno.h>
30
31 /* Support the sctp_bindx() interface.
32 *
33 * See Sockets API Extensions for SCTP. Section 8.1.
34 *
35 * Instead of implementing through a socket call in sys_socketcall(),
36 * tunnel the request through setsockopt().
37 */
38 int
sctp_bindx(int fd,struct sockaddr * addrs,int addrcnt,int flags)39 sctp_bindx(int fd, struct sockaddr *addrs, int addrcnt, int flags)
40 {
41 int setsock_option = 0;
42 void *addrbuf;
43 struct sockaddr *sa_addr;
44 socklen_t addrs_size = 0;
45 int i;
46
47 switch (flags) {
48 case SCTP_BINDX_ADD_ADDR:
49 setsock_option = SCTP_SOCKOPT_BINDX_ADD;
50 break;
51 case SCTP_BINDX_REM_ADDR:
52 setsock_option = SCTP_SOCKOPT_BINDX_REM;
53 break;
54 default:
55 errno = EINVAL;
56 return -1;
57 }
58
59 addrbuf = addrs;
60 for (i = 0; i < addrcnt; i++) {
61 sa_addr = (struct sockaddr *)addrbuf;
62 switch (sa_addr->sa_family) {
63 case AF_INET:
64 addrs_size += sizeof(struct sockaddr_in);
65 addrbuf += sizeof(struct sockaddr_in);
66 break;
67 case AF_INET6:
68 addrs_size += sizeof(struct sockaddr_in6);
69 addrbuf += sizeof(struct sockaddr_in6);
70 break;
71 default:
72 errno = EINVAL;
73 return -1;
74 }
75 }
76
77 return setsockopt(fd, SOL_SCTP, setsock_option, addrs, addrs_size);
78 }
79