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annotate src/g23m-fad/tcpip/rnet/rnet_rt/rnet_rt_api_recv.c @ 662:8cd8fd15a095

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SIM speed enhancement re-enabled and made configurable TI's original code supported SIM speed enhancement, but Openmoko had it disabled, and OM's disabling of speed enhancement somehow caused certain SIM cards to start working which didn't work before (OM's bug #666). Because our FC community is much smaller in year 2020 than OM's community was in their day, we are not able to find one of those #666-affected SIMs, thus the real issue they had encountered remains elusive. Thus our solution is to re-enable SIM speed enhancement and simply wait for if and when someone runs into a #666-affected SIM once again. We provide a SIM_allow_speed_enhancement global variable that allows SIM speed enhancement to be enabled or disabled per session, and an /etc/SIM_spenh file in FFS that allows it to enabled or disabled on a non-volatile basis. SIM speed enhancement is now enabled by default.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 24 May 2020 05:02:28 +0000
parents 90eb61ecd093
children
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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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diff changeset
113 /* rvf_lock_mutex( &rnet_rt_env_ctrl_blk_p->mutex); */
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 ret = ngSAIORecv( (NGsock *) desc, buff, *len_p, &rflags, NULL, NULL);
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 if( ret == NG_EWOULDBLOCK) {
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 /* no more data to read, will send T_RNET_RECV_IND message */
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 /* when new data will be received */
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 ((T_RNET_RT_SOCK *) desc)->flags |= RNET_RT_SOCKF_NOTIFY_RECV;
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 ret = 0;
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 }
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 /*
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 else if( ret == 0) {
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 ret = NG_ECONNRESET;
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 }
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 */
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 /* rvf_unlock_mutex( &rnet_rt_env_ctrl_blk_p->mutex); */
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 if( ret >= 0) {
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 *len_p = ret;
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 /* check if message was truncated */
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 return( (rflags & NG_IO_TRUNC) ? RNET_MSG_SIZE : RNET_OK);
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 }
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 return( rnet_rt_ngip_error( ret));
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 }
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 #endif /* ifdef RNET_CFG_REAL_TRANSPORT */
90eb61ecd093 src/g23m-fad: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138