FreeCalypso > hg > fc-tourmaline
annotate src/g23m-fad/tcpip/rnet/rnet_rt/rnet_rt_api_recv.c @ 281:a75eefbf8be4
Phone boot with PWON: weed out short button presses
Every standard end user phone has a design provision, most naturally
implemented in firmware, whereby the PWON button effects a boot only
if it is held down long enough - short presses of this PWON button
are detected, assumed to be spurious and cause the fw to power back off
instead of proceeding with boot. The present change introduces this
standard function in FreeCalypso.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 24 Sep 2021 02:03:08 +0000 |
parents | fa8dc04885d8 |
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rev | line source |
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1
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1 /** |
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2 * @file rnet_rt_api_recv.c |
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3 * |
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4 * RNET_RT API |
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5 * |
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6 * @author Regis Feneon |
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7 * @version 0.1 |
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8 */ |
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9 |
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10 /* |
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11 * $Id: rnet_rt_api_recv.c,v 1.4 2002/10/30 15:23:34 rf Exp $ |
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12 * $Name: ti_20021030 $ |
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13 * |
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14 * History: |
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15 * |
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16 * Date Author Modification |
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17 * -------------------------------------------------- |
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18 * 3/22/2002 Regis Feneon Create |
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19 * 6/24/2002 Regis Feneon check NG_IO_TRUNC flag |
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20 * (C) Copyright 2002 by TI, All Rights Reserved |
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21 * |
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22 */ |
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23 |
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24 #include "rnet_cfg.h" |
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25 #ifdef RNET_CFG_REAL_TRANSPORT |
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26 |
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27 #include "rnet_rt_i.h" |
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28 #include "rnet_rt_env.h" |
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29 |
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30 |
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31 |
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32 /** |
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33 * Read the waiting data (not-blocking). |
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34 * |
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35 * Data reception is message based: When the application receives a |
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36 * T_RNET_RECV_IND message, it can read the data with this |
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37 * rnet_recv() function. |
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38 * |
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39 * The data are copied in the buffer given by the application to RNET |
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40 * via this rnet_recv function. |
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41 * |
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42 * Datagram oriented (UDP) |
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43 * ----------------------- |
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44 * When an UDP datagram arrives, the receiver application receives |
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45 * a T_RNET_RECV_IND message. The application can then read the |
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46 * datagram with the rnet_recv function. The buffer passed to the |
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47 * function should be big enough to contain a UDP datagram, otherwise |
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48 * the message is not put in the buffer and the error code |
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49 * RNET_MSG_SIZE is returned. |
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50 * |
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51 * The OUT value of the len_p parameter can have two possible values: |
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52 * - If there was data to read and no error detected (function |
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53 * returned RNET_OK), len_p contains the size of the received datagram. |
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54 * - If there was no error, but no data to read, len_p contains 0. |
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55 * |
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56 * RNET will only send a new T_RNET_RECV_IND with a specific descriptor |
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57 * when a rnet_recv function has been called that returned a len_p parameter |
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58 * with a 0 value. Therefore, the application should loop on rnet_recv when |
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59 * it receives a T_RNET_RECV_IND message, like: |
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60 * UINT16 *len_p = -1; |
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61 * while (*len_p != 0) { |
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62 * ret = rnet_recv(desc, buff, len_p); |
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63 * ... |
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64 * } |
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65 * |
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66 * Stream oriented (TCP) |
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67 * --------------------- |
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68 * When a new stream of data arrives on a connection, the receiver |
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69 * application receives a T_RNET_RECV_IND. It can then read the flow |
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70 * with the rnet_recv function, until the len_p parameter is returned |
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71 * with a 0 value. |
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72 * |
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73 * The stack will only send a new T_RNET_RECV_IND message when |
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74 * rnet_recv has been called and has returned the len_p parameter with a 0. |
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75 * |
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76 * |
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77 * @param desc Connection identifier [IN]. |
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78 * @param buff Buffer to store the received data [OUT]. |
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79 * @param len_p Pointer on the length of the passed buffer [IN] |
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80 * Pointer on the size of the received data in the buffer [OUT]. |
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81 * @return RNET_MEMORY_ERR Not enough memory is available |
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82 * RNET_NOT_INITIALIZED NET subsystem not initialized (internal error). |
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83 * RNET_INTERNAL_ERR Network subsystem failed. |
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84 * RNET_NOT_READY Still processing a callback function. |
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85 * RNET_INVALID_PARAMETER The connection ID is invalid. |
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86 * or The ID is not connected. |
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87 * or Invalid buff parameter. |
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88 * or Connection not bound with bind. |
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89 * RNET_CONN_ABORTED Connection broken due to the "keep-alive" activity |
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90 * detecting a failure while the operation was in progress. |
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91 * or Virtual circuit terminated due to a time-out or other failure. |
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92 * RNET_MSG_SIZE The socket is message oriented (UDP), and the message |
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93 * was too large to fit into the specified buffer and was truncated. |
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94 * RNET_CONN_RESET The virtual circuit was reset by the remote side executing a "hard" |
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95 * or "abortive" close. |
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96 * RNET_TIMEOUT The connection has been dropped, because of a |
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97 * network failure or because the system on the other end went down |
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98 * without notice. |
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99 * RNET_NET_UNREACHABLE Remote host cannot be reached from this host at this time. |
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100 * RNET_OK Data successfully read. |
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101 */ |
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102 |
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103 T_RNET_RET rnet_rt_recv (T_RNET_DESC * desc, |
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104 T_RVF_BUFFER *buff, |
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105 UINT16 * len_p) |
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106 { |
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107 int ret, rflags; |
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108 |
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109 rflags = 0; |
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110 /* For GPF TCPIP we do not need the mutex calls, because the entity is |
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111 * single threaded and the functions are not called from other entities. |
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112 */ |
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113 /* rvf_lock_mutex( &rnet_rt_env_ctrl_blk_p->mutex); */ |
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114 ret = ngSAIORecv( (NGsock *) desc, buff, *len_p, &rflags, NULL, NULL); |
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115 if( ret == NG_EWOULDBLOCK) { |
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116 /* no more data to read, will send T_RNET_RECV_IND message */ |
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117 /* when new data will be received */ |
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118 ((T_RNET_RT_SOCK *) desc)->flags |= RNET_RT_SOCKF_NOTIFY_RECV; |
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119 ret = 0; |
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120 } |
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121 /* |
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122 else if( ret == 0) { |
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123 ret = NG_ECONNRESET; |
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124 } |
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125 */ |
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126 /* rvf_unlock_mutex( &rnet_rt_env_ctrl_blk_p->mutex); */ |
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127 |
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128 if( ret >= 0) { |
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129 *len_p = ret; |
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130 /* check if message was truncated */ |
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131 return( (rflags & NG_IO_TRUNC) ? RNET_MSG_SIZE : RNET_OK); |
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132 } |
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133 |
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134 return( rnet_rt_ngip_error( ret)); |
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135 } |
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136 |
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137 #endif /* ifdef RNET_CFG_REAL_TRANSPORT */ |
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138 |