135 строки
4.5 KiB
C
135 строки
4.5 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2006 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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/* *****************************************************************************
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* General purpose routines.
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* ***************************************************************************
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*/
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#include "btl_sctp_utils.h"
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/**
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* struct sockaddr_in mca_btl_sctp_utils_sockaddr_from_frag
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* --------------------------------------------------------
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* Returns a sockaddr_in struct associated with the mca_btl_sctp_frag_t *frag.
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*/
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struct sockaddr_in mca_btl_sctp_utils_sockaddr_from_frag(struct mca_btl_sctp_frag_t *frag) {
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struct sockaddr_in btl_sockaddr;
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bzero(&btl_sockaddr, sizeof(struct sockaddr_in));
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btl_sockaddr.sin_family = AF_INET;
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btl_sockaddr.sin_port = frag->endpoint->endpoint_addr->addr_port;
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btl_sockaddr.sin_addr.s_addr = frag->endpoint->endpoint_addr->addr_inet.s_addr;
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return btl_sockaddr;
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}
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/**
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* struct sockaddr_in mca_btl_sctp_utils_sockaddr_from_endpoint
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* ------------------------------------------------------------
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* Returns a sockaddr_in struct associated with the mca_btl_base_endpoint_t *ep.
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*/
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struct sockaddr_in mca_btl_sctp_utils_sockaddr_from_endpoint(struct mca_btl_base_endpoint_t *ep) {
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struct sockaddr_in btl_sockaddr;
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bzero(&btl_sockaddr, sizeof(struct sockaddr_in));
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btl_sockaddr.sin_family = AF_INET;
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btl_sockaddr.sin_port = ep->endpoint_addr->addr_port;
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btl_sockaddr.sin_addr.s_addr = ep->endpoint_addr->addr_inet.s_addr;
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return btl_sockaddr;
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}
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/**
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* int mca_btl_sctp_utils_writev(int sd, struct iovec *vec, size_t len,
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* struct sockaddr *to_addr, socklen_t to_len, uint16_t stream_no)
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* -----------------------------------------------------------------------
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* Vector write.
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*/
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int mca_btl_sctp_utils_writev(int sd, struct iovec *vec, size_t len,
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struct sockaddr *to_addr, socklen_t to_len, uint16_t stream_no) {
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#if OMPI_MCA_BTL_SCTP_CONCATENATES_IOVS
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/* required for Solaris since struct msghdr has no msg_control field */
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int current_cnt=0, total_offset=0, total=0, byte_sent;
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char *send_buf;
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/* count the total and allocate space to copy to */
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while(current_cnt < len) {
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total += vec[current_cnt].iov_len;
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current_cnt++;
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}
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if(NULL == (send_buf = (char *) malloc(total))) {
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BTL_ERROR(("Ran out of memory."));
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return 0;
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}
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/* combine all iovcnt's into one message. write all or nothing */
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current_cnt=0;
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while(current_cnt < len) {
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memcpy(send_buf+total_offset, vec[current_cnt].iov_base, vec[current_cnt].iov_len);
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total_offset += vec[current_cnt].iov_len;
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current_cnt++;
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}
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byte_sent = sctp_sendmsg(sd, send_buf, total, (struct sockaddr *) to_addr,
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sizeof(*to_addr), 0, 0, stream_no, 0, 0);
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free(send_buf);
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return byte_sent;
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#else
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/* uses iovec directly */
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char outcmesg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
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struct cmsghdr *cmesg;
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struct msghdr outmesg;
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struct sctp_sndrcvinfo *srinfo;
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/* Default these to 0. */
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uint32_t ppid = 0;
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uint32_t flags = 0;
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uint32_t ttl = 0;
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uint32_t cxt = 0;
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outmesg.msg_name = to_addr;
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outmesg.msg_namelen = to_len;
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outmesg.msg_iov = vec;
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outmesg.msg_iovlen = 1;
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outmesg.msg_flags = 0;
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outmesg.msg_control = outcmesg;
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outmesg.msg_controllen = sizeof(outcmesg);
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cmesg = CMSG_FIRSTHDR(&outmesg);
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cmesg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
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outmesg.msg_controllen = cmesg->cmsg_len;
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cmesg->cmsg_level = IPPROTO_SCTP;
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cmesg->cmsg_type = SCTP_SNDRCV;
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srinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmesg);
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memset(srinfo, 0, sizeof(struct sctp_sndrcvinfo));
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srinfo->sinfo_ppid = ppid;
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srinfo->sinfo_flags = flags;
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srinfo->sinfo_stream = stream_no;
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srinfo->sinfo_timetolive = ttl;
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srinfo->sinfo_context = cxt;
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return sendmsg(sd, &outmesg, 0);
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#endif
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}
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