1 mike 1.1.2.2 /*
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2 mike 1.1.2.1 //%2006////////////////////////////////////////////////////////////////////////
3 //
4 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
5 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
6 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
7 // IBM Corp.; EMC Corporation, The Open Group.
8 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
9 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
10 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
11 // EMC Corporation; VERITAS Software Corporation; The Open Group.
12 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
13 // EMC Corporation; Symantec Corporation; The Open Group.
14 //
15 // Permission is hereby granted, free of charge, to any person obtaining a copy
16 // of this software and associated documentation files (the "Software"), to
17 // deal in the Software without restriction, including without limitation the
18 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
19 // sell copies of the Software, and to permit persons to whom the Software is
20 // furnished to do so, subject to the following conditions:
21 //
22 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
23 mike 1.1.2.1 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
24 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
25 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
26 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
27 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 //
31 //%/////////////////////////////////////////////////////////////////////////////
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32 mike 1.1.2.2 */
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33 mike 1.1.2.1
34 #ifndef _Executor_Socket_h
35 #define _Executor_Socket_h
36
37 #include <stdlib.h>
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38 mike 1.1.2.3 #include "Defines.h"
39 #include <sys/socket.h>
40 #include <string.h>
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41 mike 1.1.2.7 #include "Defines.h"
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42 mike 1.1.2.1
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43 mike 1.1.2.3 EXECUTOR_LINKAGE
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44 mike 1.1.2.1 int SetNonBlocking(int sock);
45
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46 mike 1.1.2.3 EXECUTOR_LINKAGE
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47 mike 1.1.2.6 int SetBlocking(int sock);
48
49 EXECUTOR_LINKAGE
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50 mike 1.1.2.1 ssize_t RecvNonBlock(int sock, void* buffer, size_t size);
51
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52 mike 1.1.2.3 EXECUTOR_LINKAGE
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53 mike 1.1.2.1 ssize_t SendNonBlock(int sock, const void* buffer, size_t size);
54
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55 mike 1.1.2.3 EXECUTOR_LINKAGE
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56 mike 1.1.2.1 int CloseOnExec(int fd);
57
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58 mike 1.1.2.3 EXECUTOR_LINKAGE
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59 mike 1.1.2.1 ssize_t SendDescriptorArray(int sock, int descriptors[], size_t count);
60
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61 mike 1.1.2.3 EXECUTOR_LINKAGE
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62 mike 1.1.2.1 int CreateSocketPair(int pair[2]);
63
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64 mike 1.1.2.3 static int RecvDescriptorArray(int sock, int descriptors[], size_t count)
65 {
66 struct iovec iov[1];
67 char dummy;
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68 mike 1.1.2.7 struct msghdr mh;
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69 mike 1.1.2.3 ssize_t n;
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70 mike 1.1.2.7 #if defined(HAVE_MSG_CONTROL)
71 size_t size;
72 char* data;
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73 mike 1.1.2.3 struct cmsghdr* cmh = CMSG_FIRSTHDR(&mh);
74
75 /*
76 * This control data begins with a cmsghdr struct followed by the data
77 * (a descriptor in this case). The union ensures that the data is
78 * aligned suitably for the leading cmsghdr struct. The descriptor
79 * itself is properly aligned since the cmsghdr ends on a boundary
80 * that is suitably aligned for any type (including int).
81 *
82 * ControlData = [ cmsghdr | int ]
83 */
84
85 size = CMSG_SPACE(sizeof(int) * count);
86 data = (char*)malloc(size);
87
88 /* Define a msghdr that refers to the control data, which is filled in
89 * by calling recvmsg() below.
90 */
91
92 memset(&mh, 0, sizeof(mh));
93 mh.msg_control = data;
94 mike 1.1.2.3 mh.msg_controllen = size;
95
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96 mike 1.1.2.7 #else /* !defined(HAVE_MSG_CONTROL) */
97
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98 mike 1.1.2.10 memset(&mh, 0, sizeof(mh));
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99 mike 1.1.2.7 mh.msg_accrights = (caddr_t)descriptors;
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100 kumpf 1.1.2.9 mh.msg_accrightslen = sizeof(int) * count;
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101 mike 1.1.2.7
102 #endif /* defined(HAVE_MSG_CONTROL) */
103
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104 mike 1.1.2.3 /*
105 * The other process sends a single-byte message. This byte is not
106 * used since we only need the control data (the descriptor) but we
107 * must request at least one byte from recvmsg().
108 */
109
110 memset(iov, 0, sizeof(iov));
111 iov[0].iov_base = &dummy;
112 iov[0].iov_len = 1;
113 mh.msg_iov = iov;
114 mh.msg_iovlen = 1;
115
116 /* Receive the message from the other process. */
117
118 n = recvmsg(sock, &mh, 0);
119
120 if (n <= 0)
121 return -1;
122
123 /* Get a pointer to control message. Return if the header is null or
124 * does not contain what we expect.
125 mike 1.1.2.3 */
126
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127 mike 1.1.2.7 #if defined(HAVE_MSG_CONTROL)
128
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129 mike 1.1.2.3 cmh = CMSG_FIRSTHDR(&mh);
130
131 if (!cmh ||
132 cmh->cmsg_len != CMSG_LEN(sizeof(int) * count) ||
133 cmh->cmsg_level != SOL_SOCKET ||
134 cmh->cmsg_type != SCM_RIGHTS)
135 {
136 return -1;
137 }
138
139 /* Copy the data: */
140
141 memcpy(descriptors, CMSG_DATA(cmh), sizeof(int) * count);
142
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143 mike 1.1.2.7 #else /* !defined(HAVE_MSG_CONTROL) */
144
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145 kumpf 1.1.2.9 if (mh.msg_accrightslen != sizeof(int) * count)
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146 mike 1.1.2.7 return -1;
147
148 memcpy(descriptors, mh.msg_accrights, sizeof(int) * count);
149
150 #endif /* defined(HAVE_MSG_CONTROL) */
151
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152 mike 1.1.2.3 return 0;
153 }
154
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155 mike 1.1.2.1 #endif /* _Executor_Socket_h */
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Return to
Socket.h
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