2 * Copyright (c) 2009-2010 The FreeBSD Foundation
5 * This software was developed by Pawel Jakub Dawidek under sponsorship from
6 * the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/types.h>
34 #include <sys/socket.h>
41 #include "proto_impl.h"
43 /* Maximum size of packet we want to use when sending data. */
45 #define MAX_SEND_SIZE 32768
49 proto_descriptor_send(int sock, int fd)
51 unsigned char ctrl[CMSG_SPACE(sizeof(fd))];
55 PJDLOG_ASSERT(sock >= 0);
56 PJDLOG_ASSERT(fd >= 0);
58 bzero(&msg, sizeof(msg));
59 bzero(&ctrl, sizeof(ctrl));
63 msg.msg_control = ctrl;
64 msg.msg_controllen = sizeof(ctrl);
66 cmsg = CMSG_FIRSTHDR(&msg);
67 cmsg->cmsg_level = SOL_SOCKET;
68 cmsg->cmsg_type = SCM_RIGHTS;
69 cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
70 bcopy(&fd, CMSG_DATA(cmsg), sizeof(fd));
72 if (sendmsg(sock, &msg, 0) == -1)
79 proto_common_send(int sock, const unsigned char *data, size_t size, int fd)
84 PJDLOG_ASSERT(sock >= 0);
85 PJDLOG_ASSERT(data != NULL);
86 PJDLOG_ASSERT(size > 0);
89 sendsize = size < MAX_SEND_SIZE ? size : MAX_SEND_SIZE;
90 done = send(sock, data, sendsize, MSG_NOSIGNAL);
104 return (proto_descriptor_send(sock, fd));
108 proto_descriptor_recv(int sock, int *fdp)
110 unsigned char ctrl[CMSG_SPACE(sizeof(*fdp))];
112 struct cmsghdr *cmsg;
114 PJDLOG_ASSERT(sock >= 0);
115 PJDLOG_ASSERT(fdp != NULL);
117 bzero(&msg, sizeof(msg));
118 bzero(&ctrl, sizeof(ctrl));
122 msg.msg_control = ctrl;
123 msg.msg_controllen = sizeof(ctrl);
125 if (recvmsg(sock, &msg, 0) == -1)
128 cmsg = CMSG_FIRSTHDR(&msg);
129 if (cmsg->cmsg_level != SOL_SOCKET ||
130 cmsg->cmsg_type != SCM_RIGHTS) {
133 bcopy(CMSG_DATA(cmsg), fdp, sizeof(*fdp));
139 proto_common_recv(int sock, unsigned char *data, size_t size, int *fdp)
143 PJDLOG_ASSERT(sock >= 0);
144 PJDLOG_ASSERT(data != NULL);
145 PJDLOG_ASSERT(size > 0);
148 done = recv(sock, data, size, MSG_WAITALL);
149 } while (done == -1 && errno == EINTR);
156 return (proto_descriptor_recv(sock, fdp));