diff options
Diffstat (limited to 'net/sctp/socket.c')
| -rw-r--r-- | net/sctp/socket.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index cda5d5aab53c..85fcc4fa6ee9 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -2183,6 +2183,50 @@ static inline int sctp_getsockopt_get_local_addrs(struct sock *sk, int len, return 0; } +/* + * + * 7.1.15 Set default send parameters (SET_DEFAULT_SEND_PARAM) + * + * Applications that wish to use the sendto() system call may wish to + * specify a default set of parameters that would normally be supplied + * through the inclusion of ancillary data. This socket option allows + * such an application to set the default sctp_sndrcvinfo structure. + * The application that wishes to use this socket option simply passes + * in to this call the sctp_sndrcvinfo structure defined in Section + * 5.2.2) The input parameters accepted by this call include + * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, + * sinfo_timetolive. The user must provide the sinfo_assoc_id field in + * to this call if the caller is using the UDP model. + * + * For getsockopt, it get the default sctp_sndrcvinfo structure. + */ +static inline int sctp_getsockopt_set_default_send_param(struct sock *sk, + int len, char *optval, int *optlen) +{ + struct sctp_sndrcvinfo info; + sctp_association_t *asoc; + + if (len != sizeof(struct sctp_sndrcvinfo)) + return -EINVAL; + if (copy_from_user(&info, optval, sizeof(struct sctp_sndrcvinfo))) + return -EFAULT; + + asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); + if (!asoc) + return -EINVAL; + + info.sinfo_stream = asoc->defaults.stream; + info.sinfo_flags = asoc->defaults.flags; + info.sinfo_ppid = asoc->defaults.ppid; + info.sinfo_context = asoc->defaults.context; + info.sinfo_timetolive = asoc->defaults.timetolive; + + if (copy_to_user(optval, &info, sizeof(struct sctp_sndrcvinfo))) + return -EFAULT; + + return 0; +} + SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen) { @@ -2260,6 +2304,11 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname, optlen); break; + case SCTP_SET_DEFAULT_SEND_PARAM: + retval = sctp_getsockopt_set_default_send_param(sk, len, + optval, optlen); + break; + default: retval = -ENOPROTOOPT; break; |