1fab62b1e1
file into smaller pieces that are hopefully easier to understand and extend. This is to pave the ground for adding few more socket timestamp formats that I am working on here. No functional changes (I hope).
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/*-
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* Copyright (c) 2005 Andrey Simonenko
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "uc_common.h"
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#include "t_generic.h"
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#include "t_cmsg_len.h"
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#ifndef __LP64__
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static int
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t_cmsg_len_client(int fd)
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{
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struct msghdr msghdr;
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struct iovec iov[1];
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struct cmsghdr *cmsghdr;
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void *cmsg_data;
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size_t size, cmsg_size;
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socklen_t socklen;
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int rv;
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if (uc_sync_recv() < 0)
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return (-2);
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rv = -2;
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cmsg_size = CMSG_SPACE(sizeof(struct cmsgcred));
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cmsg_data = malloc(cmsg_size);
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if (cmsg_data == NULL) {
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uc_logmsg("malloc");
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goto done;
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}
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uc_msghdr_init_client(&msghdr, iov, cmsg_data, cmsg_size,
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SCM_CREDS, sizeof(struct cmsgcred));
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cmsghdr = CMSG_FIRSTHDR(&msghdr);
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if (uc_socket_connect(fd) < 0)
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goto done;
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size = msghdr.msg_iov != NULL ? msghdr.msg_iov->iov_len : 0;
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rv = -1;
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for (socklen = 0; socklen < CMSG_LEN(0); ++socklen) {
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cmsghdr->cmsg_len = socklen;
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uc_dbgmsg("send: data size %zu", size);
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uc_dbgmsg("send: msghdr.msg_controllen %u",
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(u_int)msghdr.msg_controllen);
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uc_dbgmsg("send: cmsghdr.cmsg_len %u",
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(u_int)cmsghdr->cmsg_len);
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if (sendmsg(fd, &msghdr, 0) < 0) {
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uc_dbgmsg("sendmsg(2) failed: %s; retrying",
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strerror(errno));
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continue;
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}
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uc_logmsgx("sent message with cmsghdr.cmsg_len %u < %u",
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(u_int)cmsghdr->cmsg_len, (u_int)CMSG_LEN(0));
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break;
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}
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if (socklen == CMSG_LEN(0))
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rv = 0;
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if (uc_sync_send() < 0) {
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rv = -2;
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goto done;
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}
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done:
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free(cmsg_data);
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return (rv);
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}
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static int
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t_cmsg_len_server(int fd1)
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{
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int fd2, rv;
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if (uc_sync_send() < 0)
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return (-2);
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rv = -2;
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if (uc_cfg.sock_type == SOCK_STREAM) {
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fd2 = uc_socket_accept(fd1);
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if (fd2 < 0)
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goto done;
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} else
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fd2 = fd1;
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if (uc_sync_recv() < 0)
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goto done;
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rv = 0;
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done:
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if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0)
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if (uc_socket_close(fd2) < 0)
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rv = -2;
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return (rv);
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}
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int
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t_cmsg_len(void)
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{
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return (t_generic(t_cmsg_len_client, t_cmsg_len_server));
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}
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#endif
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