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1 | /** @file\r | |
2 | Implement the connect API.\r | |
3 | \r | |
4 | Copyright (c) 2011, Intel Corporation\r | |
5 | All rights reserved. This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include <SocketInternals.h>\r | |
16 | \r | |
17 | \r | |
18 | /**\r | |
19 | Connect to a remote system via the network.\r | |
20 | \r | |
21 | The ::connect routine attempts to establish a connection to a\r | |
22 | socket on the local or remote system using the specified address.\r | |
23 | The\r | |
24 | <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/connect.html">POSIX</a>\r | |
25 | documentation is available online.\r | |
26 | \r | |
27 | There are three states associated with a connection:\r | |
28 | <ul>\r | |
29 | <li>Not connected</li>\r | |
30 | <li>Connection in progress</li>\r | |
31 | <li>Connected</li>\r | |
32 | </ul>\r | |
33 | In the "Not connected" state, calls to ::connect start the connection\r | |
34 | processing and update the state to "Connection in progress". During\r | |
35 | the "Connection in progress" state, connect polls for connection completion\r | |
36 | and moves the state to "Connected" after the connection is established.\r | |
37 | Note that these states are only visible when the file descriptor is marked\r | |
38 | with O_NONBLOCK. Also, the POLL_WRITE bit is set when the connection\r | |
39 | completes and may be used by poll or select as an indicator to call\r | |
40 | connect again.\r | |
41 | \r | |
42 | @param [in] s Socket file descriptor returned from ::socket.\r | |
43 | \r | |
44 | @param [in] address Network address of the remote system\r | |
45 | \r | |
46 | @param [in] address_len Length of the remote network address\r | |
47 | \r | |
48 | @return ::connect returns zero if successful and -1 when an error occurs.\r | |
49 | In the case of an error, errno contains more details.\r | |
50 | \r | |
51 | **/\r | |
52 | int\r | |
53 | connect (\r | |
54 | int s,\r | |
55 | const struct sockaddr * address,\r | |
56 | socklen_t address_len\r | |
57 | )\r | |
58 | {\r | |
59 | BOOLEAN bBlocking;\r | |
60 | int ConnectStatus;\r | |
61 | struct __filedes * pDescriptor;\r | |
62 | EFI_SOCKET_PROTOCOL * pSocketProtocol;\r | |
63 | EFI_STATUS Status;\r | |
64 | \r | |
65 | //\r | |
66 | // Locate the context for this socket\r | |
67 | //\r | |
68 | pSocketProtocol = BslFdToSocketProtocol ( s,\r | |
69 | &pDescriptor,\r | |
70 | &errno );\r | |
71 | if ( NULL != pSocketProtocol ) {\r | |
72 | //\r | |
73 | // TODO: Check for NON_BLOCKING\r | |
74 | //\r | |
75 | bBlocking = TRUE;\r | |
76 | \r | |
77 | //\r | |
78 | // Attempt to connect to a remote system\r | |
79 | //\r | |
80 | do {\r | |
81 | errno = 0;\r | |
82 | Status = pSocketProtocol->pfnConnect ( pSocketProtocol,\r | |
83 | address,\r | |
84 | address_len,\r | |
85 | &errno );\r | |
86 | } while ( bBlocking && ( EFI_NOT_READY == Status ));\r | |
87 | }\r | |
88 | \r | |
89 | //\r | |
90 | // Return the new socket file descriptor\r | |
91 | //\r | |
92 | ConnectStatus = (0 == errno) ? 0 : -1;\r | |
93 | return ConnectStatus;\r | |
94 | }\r |