901 lines
35 KiB
C
901 lines
35 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2013 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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/* iosocket_readfl.c */
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#include "mdef.h"
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#include <errno.h>
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#include "gtm_stdio.h"
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#include "gtm_time.h"
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#ifdef __MVS__
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#include <sys/time.h>
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#endif
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#include "gtm_socket.h"
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#include "gtm_inet.h"
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#include "gtm_string.h"
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#ifdef UNIX
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#include "gtm_fcntl.h"
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#include "eintr_wrappers.h"
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#endif
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#include "gt_timer.h"
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#include "io.h"
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#include "iotimer.h"
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#include "iotcpdef.h"
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#include "iotcproutine.h"
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#include "stringpool.h"
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#include "iosocketdef.h"
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#include "min_max.h"
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#include "outofband.h"
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#include "wake_alarm.h"
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#include "gtm_conv.h"
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#include "gtm_utf8.h"
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#include <rtnhdr.h>
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#include "stack_frame.h"
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#include "mv_stent.h"
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#include "send_msg.h"
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#include "error.h"
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#include "trace_table.h"
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GBLREF stack_frame *frame_pointer;
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GBLREF unsigned char *stackbase, *stacktop, *msp, *stackwarn;
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GBLREF mv_stent *mv_chain;
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GBLREF io_pair io_curr_device;
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#ifdef UNIX
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GBLREF io_pair io_std_device;
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GBLREF bool prin_in_dev_failure;
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#endif
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GBLREF bool out_of_time;
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GBLREF spdesc stringpool;
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GBLREF volatile int4 outofband;
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GBLREF mstr chset_names[];
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GBLREF UConverter *chset_desc[];
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GBLREF boolean_t dollar_zininterrupt;
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GBLREF int socketus_interruptus;
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GBLREF boolean_t gtm_utf8_mode;
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error_def(ERR_BOMMISMATCH);
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error_def(ERR_CURRSOCKOFR);
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error_def(ERR_GETSOCKOPTERR);
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error_def(ERR_IOEOF);
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error_def(ERR_MAXSTRLEN);
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error_def(ERR_NOSOCKETINDEV);
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error_def(ERR_SETSOCKOPTERR);
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error_def(ERR_STACKCRIT);
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error_def(ERR_STACKOFLOW);
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error_def(ERR_TEXT);
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error_def(ERR_ZINTRECURSEIO);
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UNIX_ONLY(error_def(ERR_NOPRINCIO);)
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#ifdef UNICODE_SUPPORTED
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/* Maintenance of $KEY, $DEVICE and $ZB on a badchar error */
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void iosocket_readfl_badchar(mval *vmvalptr, int datalen, int delimlen, unsigned char *delimptr, unsigned char *strend)
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{
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int tmplen, len;
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unsigned char *delimend;
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io_desc *iod;
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d_socket_struct *dsocketptr;
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iod = io_curr_device.in;
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dsocketptr = (d_socket_struct *)(iod->dev_sp);
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vmvalptr->str.len = datalen;
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vmvalptr->str.addr = (char *)stringpool.free;
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if (0 < datalen)
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{ /* Return how much input we got */
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if ((CHSET_M != iod->ichset) && (CHSET_UTF8 != iod->ichset))
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{
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DBGSOCK2((stdout, "socrflbc: Converting UTF16xx data back to UTF8 for internal use\n"));
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vmvalptr->str.len = gtm_conv(chset_desc[iod->ichset], chset_desc[CHSET_UTF8], &vmvalptr->str, NULL, NULL);
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vmvalptr->str.addr = (char *)stringpool.free;
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}
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stringpool.free += vmvalptr->str.len;
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}
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if ((NULL != strend) && (NULL != delimptr))
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{ /* First find the end of the delimiter (max of 4 bytes) */
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if (0 == delimlen)
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{
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for (delimend = delimptr; (GTM_MB_LEN_MAX >= delimlen) && (delimend < strend); ++delimend, ++delimlen)
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{
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if (UTF8_VALID(delimend, strend, tmplen))
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break;
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}
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}
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if (0 < delimlen)
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{ /* Set $KEY and $ZB with the failing badchar */
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memcpy(iod->dollar.zb, delimptr, MIN(delimlen, ESC_LEN - 1));
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iod->dollar.zb[MIN(delimlen, ESC_LEN - 1)] = '\0';
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memcpy(iod->dollar.key, delimptr, MIN(delimlen, DD_BUFLEN - 1));
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iod->dollar.key[MIN(delimlen, DD_BUFLEN - 1)] = '\0';
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}
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}
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len = SIZEOF(ONE_COMMA) - 1;
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memcpy(iod->dollar.device, ONE_COMMA, len);
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memcpy(&iod->dollar.device[len], BADCHAR_DEVICE_MSG, SIZEOF(BADCHAR_DEVICE_MSG));
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}
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#endif
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/* VMS uses the UCX interface; should support others that emulate it
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* width == 0 is a flag for non-fixed length read. timeout is in seconds
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*/
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int iosocket_readfl(mval *v, int4 width, int4 timeout)
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{
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int ret, byteperchar;
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boolean_t timed, vari, more_data, terminator, has_delimiter, requeue_done;
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boolean_t zint_restart, outofband_terminate, one_read_done, utf8_active;
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int flags, len, real_errno, save_errno, fcntl_res, errlen, charlen, stp_need;
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int bytes_read, orig_bytes_read, ii, max_bufflen, bufflen, chars_read, mb_len, match_delim;
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io_desc *iod;
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d_socket_struct *dsocketptr;
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socket_struct *socketptr;
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int4 msec_timeout; /* timeout in milliseconds */
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TID timer_id;
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ABS_TIME cur_time, end_time, time_for_read, zero;
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char *errptr;
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unsigned char *buffptr, *c_ptr, *c_top, *inv_beg, *buffer_start, *old_stringpool_free;
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ssize_t status;
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gtm_chset_t ichset;
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mv_stent *mv_zintdev;
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socket_interrupt *sockintr;
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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assert(stringpool.free >= stringpool.base);
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assert(stringpool.free <= stringpool.top);
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iod = io_curr_device.in;
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TRCTBL_ENTRY(SOCKRFL_ENTRY, width, iod, (INTPTR_T)socketus_interruptus, NULL);
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ichset = iod->ichset;
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assert(dev_open == iod->state);
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assert(gtmsocket == iod->type);
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dsocketptr = (d_socket_struct *)(iod->dev_sp);
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if (0 >= dsocketptr->n_socket)
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{
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iod->dollar.za = 9;
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rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_NOSOCKETINDEV);
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return 0;
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}
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if (dsocketptr->n_socket <= dsocketptr->current_socket)
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{
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iod->dollar.za = 9;
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rts_error_csa(CSA_ARG(NULL) VARLSTCNT(4) ERR_CURRSOCKOFR, 2, dsocketptr->current_socket, dsocketptr->n_socket);
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return 0;
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}
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utf8_active = NON_UNICODE_ONLY(FALSE) UNICODE_ONLY(gtm_utf8_mode ? IS_UTF_CHSET(ichset) : FALSE);
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byteperchar = UNICODE_ONLY(utf8_active ? GTM_MB_LEN_MAX :) 1;
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if (0 == width)
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{ /* op_readfl won't do this; must be a call from iosocket_read */
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vari = TRUE;
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width = MAX_STRLEN;
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} else
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{
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vari = FALSE;
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width = (width < MAX_STRLEN) ? width : MAX_STRLEN;
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}
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/* If width is set to MAX_STRLEN, we might be overly generous (assuming every char is just one byte) we must check if byte
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* length crosses the MAX_STRLEN boundary
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*/
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socketptr = dsocketptr->socket[dsocketptr->current_socket];
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assert(socketptr);
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sockintr = &dsocketptr->sock_save_state;
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assert(sockintr);
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outofband_terminate = FALSE;
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one_read_done = FALSE;
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zint_restart = FALSE;
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/* Check if new or resumed read */
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if (dsocketptr->mupintr)
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{ /* We have a pending read restart of some sort */
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assertpro(sockwhich_invalid != sockintr->who_saved); /* Interrupt should never have an invalid save state */
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/* Check we aren't recursing on this device */
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if (dollar_zininterrupt)
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rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_ZINTRECURSEIO);
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assertpro(sockwhich_readfl == sockintr->who_saved); /* ZINTRECURSEIO should have caught */
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DBGSOCK((stdout, "socrfl: *#*#*#*#*#*#*# Restarted interrupted read\n"));
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dsocketptr->mupintr = FALSE;
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sockintr->who_saved = sockwhich_invalid;
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mv_zintdev = io_find_mvstent(iod, FALSE);
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assert(mv_zintdev);
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if (mv_zintdev)
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{
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if (mv_zintdev->mv_st_cont.mvs_zintdev.buffer_valid)
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{
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bytes_read = mv_zintdev->mv_st_cont.mvs_zintdev.curr_sp_buffer.len;
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assert(bytes_read == sockintr->bytes_read);
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if (bytes_read)
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{
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buffer_start = (unsigned char *)mv_zintdev->mv_st_cont.mvs_zintdev.curr_sp_buffer.addr;
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zint_restart = TRUE;
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TRCTBL_ENTRY(SOCKRFL_MVS_ZINTR, bytes_read, buffer_start, stringpool.free,
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NULL); /* BYPASS_OK */
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} else
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TRCTBL_ENTRY(SOCKRFL_MVS_ZINTR, 0, NULL, stringpool.free,
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NULL); /* BYPASS_OK found but empty */
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} else
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{
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TRCTBL_ENTRY(SOCKRFL_MVS_ZINTR, 0, NULL, NULL, NULL); /* Indicate mvstent found but invalid */
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assert(FALSE);
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DBGSOCK((stdout, "socrfl: Evidence of an interrupt, but it was invalid\n"));
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}
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/* Done with this mv_stent. Pop it off if we can, else mark it inactive. */
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if (mv_chain == mv_zintdev)
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POP_MV_STENT(); /* pop if top of stack */
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else
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{ /* Else mark it unused */
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mv_zintdev->mv_st_cont.mvs_zintdev.buffer_valid = FALSE;
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mv_zintdev->mv_st_cont.mvs_zintdev.curr_sp_buffer.len = 0;
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mv_zintdev->mv_st_cont.mvs_zintdev.curr_sp_buffer.addr = NULL;
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}
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} else
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{
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sockintr->end_time_valid = FALSE;
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DBGSOCK((stdout, "socrfl: Evidence of an interrupt, but no MV_STENT\n"));
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TRCTBL_ENTRY(SOCKRFL_MVS_ZINTR, -1, NULL, NULL, NULL); /* Indicater mvstent entry not found */
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}
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} else
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sockintr->end_time_valid = FALSE;
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if (!zint_restart)
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{ /* Simple path (not restart or nothing read,) no worries
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* compute the worst case byte requirement knowing that width is in chars
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*/
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max_bufflen = (vari) ? MAX_STRBUFF_INIT
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: ((MAX_STRLEN > (width * byteperchar)) ? (width * byteperchar) : MAX_STRLEN);
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ENSURE_STP_FREE_SPACE(max_bufflen);
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bytes_read = 0;
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chars_read = 0;
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buffer_start = NULL;
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} else
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{
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max_bufflen = sockintr->max_bufflen;
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chars_read = sockintr->chars_read;
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assert(chars_read <= bytes_read);
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DBGSOCK((stdout, "socrfl: .. mv_stent found - bytes_read: %d chars_read: %d max_bufflen: %d"
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" interrupts: %d\n", bytes_read, chars_read, max_bufflen, socketus_interruptus));
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DBGSOCK((stdout, "socrfl: .. timeout: %d\n", timeout));
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DBGSOCK_ONLY2(if (sockintr->end_time_valid) DBGSOCK((stdout, "socrfl: .. endtime: %d/%d\n", end_time.at_sec,
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end_time.at_usec)));
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DBGSOCK((stdout, "socrfl: .. buffer address: 0x"lvaddr" stringpool: 0x"lvaddr"\n",
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buffer_start, stringpool.free));
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if (stringpool.free != (buffer_start + bytes_read)) /* BYPASSOK */
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{ /* Not @ stringpool.free - must move what we have, so we need room for the whole anticipated message */
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DBGSOCK2((stdout, "socrfl: .. Stuff put on string pool after our buffer\n"));
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stp_need = max_bufflen;
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} else
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{ /* Previously read buffer piece is still last thing in stringpool, so we need room for the rest */
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DBGSOCK2((stdout, "socrfl: .. Our buffer did not move in the stringpool\n"));
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stp_need = max_bufflen - bytes_read;
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assert(stp_need < max_bufflen);
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}
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TRCTBL_ENTRY(SOCKRFL_RESTARTED, chars_read, (INTPTR_T)max_bufflen, (INTPTR_T)stp_need, buffer_start);
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if (!IS_STP_SPACE_AVAILABLE(stp_need))
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{ /* Need more room */
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DBGSOCK2((stdout, "socrfl: .. garbage collection done in restart after interrupt\n"));
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v->str.addr = (char *)buffer_start; /* Protect buffer from reclaim */
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v->str.len = bytes_read;
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INVOKE_STP_GCOL(max_bufflen);
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buffer_start = (unsigned char *)v->str.addr;
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TRCTBL_ENTRY(SOCKRFL_RSTGC, 0, buffer_start, stringpool.free, NULL);
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}
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if ((buffer_start + bytes_read) < stringpool.free) /* BYPASSOK */
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{ /* Now need to move it to the top */
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assert(stp_need == max_bufflen);
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memcpy(stringpool.free, buffer_start, bytes_read); /* BYPASSOK */
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buffer_start = stringpool.free; /* BYPASSOK */
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} else
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{ /* It should still be just under the used space */
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assert((buffer_start + bytes_read) == stringpool.free); /* BYPASSOK */
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stringpool.free = buffer_start; /* backup the free pointer */
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}
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v->str.len = 0; /* Clear incase interrupt or error -- don't want to hold this buffer */
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/* At this point, our previous buffer is sitting at stringpool.free and can be
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* expanded if necessary. This is what the rest of the code is expecting.
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*/
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}
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TRCTBL_ENTRY(SOCKRFL_BEGIN, chars_read, buffer_start, stringpool.free, NULL);
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if (iod->dollar.x && (TCP_WRITE == socketptr->lastop))
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{ /* Switching from write to read */
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assert(!zint_restart);
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if (!iod->dollar.za)
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iosocket_flush(iod);
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iod->dollar.x = 0;
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}
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socketptr->lastop = TCP_READ;
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ret = TRUE;
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has_delimiter = (0 < socketptr->n_delimiter);
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time_for_read.at_sec = 0;
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if (0 == timeout)
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time_for_read.at_usec = 0;
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else if (socketptr->def_moreread_timeout)
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time_for_read.at_usec = socketptr->moreread_timeout * 1000;
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else
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time_for_read.at_usec = INITIAL_MOREREAD_TIMEOUT * 1000;
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DBGSOCK((stdout, "socrfl: moreread_timeout = %d def_moreread_timeout= %d time = %d \n",
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socketptr->moreread_timeout, socketptr->def_moreread_timeout, time_for_read.at_usec));
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timer_id = (TID)iosocket_readfl;
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out_of_time = FALSE;
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if (NO_M_TIMEOUT == timeout)
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{
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timed = FALSE;
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msec_timeout = NO_M_TIMEOUT;
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assert(!sockintr->end_time_valid);
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} else
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{
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timed = TRUE;
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msec_timeout = timeout2msec(timeout);
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if (msec_timeout > 0)
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{ /* There is time to wait */
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# ifdef UNIX
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/* Set blocking I/O */
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FCNTL2(socketptr->sd, F_GETFL, flags);
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if (flags < 0)
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{
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iod->dollar.za = 9;
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save_errno = errno;
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errptr = (char *)STRERROR(errno);
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rts_error_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_GETSOCKOPTERR, 5,
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LEN_AND_LIT("F_GETFL FOR NON BLOCKING I/O"),
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save_errno, LEN_AND_STR(errptr));
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}
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FCNTL3(socketptr->sd, F_SETFL, flags & (~(O_NDELAY | O_NONBLOCK)), fcntl_res);
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if (fcntl_res < 0)
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{
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iod->dollar.za = 9;
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save_errno = errno;
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errptr = (char *)STRERROR(errno);
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rts_error_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_SETSOCKOPTERR, 5,
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LEN_AND_LIT("F_SETFL FOR NON BLOCKING I/O"),
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save_errno, LEN_AND_STR(errptr));
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}
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# endif
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sys_get_curr_time(&cur_time);
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if (!sockintr->end_time_valid)
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add_int_to_abs_time(&cur_time, msec_timeout, &end_time);
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else
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{ /* End_time taken from restart data. Compute what msec_timeout should be so timeout timer
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* gets set correctly below.
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*/
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end_time = sockintr->end_time; /* Restore end_time for timeout */
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cur_time = sub_abs_time(&end_time, &cur_time);
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if (0 > cur_time.at_sec)
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{
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msec_timeout = -1;
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out_of_time = TRUE;
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} else
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msec_timeout = (int4)(cur_time.at_sec * 1000 + cur_time.at_usec / 1000);
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DBGSOCK((stdout, "socrfl: Taking timeout end time from read restart data - "
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"computed msec_timeout: %d\n", msec_timeout));
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}
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if (0 < msec_timeout)
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start_timer(timer_id, msec_timeout, wake_alarm, 0, NULL);
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} else
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{
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out_of_time = TRUE;
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DBGSOCK((stdout, "socrfl: No timeout specified, assuming out_of_time\n"));
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}
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}
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sockintr->end_time_valid = FALSE;
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iod->dollar.key[0] = '\0';
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iod->dollar.zb[0] = '\0';
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more_data = TRUE;
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real_errno = 0;
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requeue_done = FALSE;
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DBGSOCK((stdout, "socrfl: ##################### Entering read loop ######################\n"));
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for (status = 0; status >= 0;)
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{
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DBGSOCK2((stdout, "socrfl: ********* Top of read loop - bytes_read: %d chars_read: %d "
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"buffered_length: %d\n", bytes_read, chars_read, socketptr->buffered_length));
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DBGSOCK2((stdout, "socrfl: ********* read-width: %d vari: %d status: %d\n", width, vari, status));
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if (bytes_read >= max_bufflen)
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{ /* More buffer needed. Extend the stringpool buffer by doubling the size as much as we
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* extended previously
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*/
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DBGSOCK((stdout, "socrfl: Buffer expand1 bytes_read(%d) max_bufflen(%d)\n",
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bytes_read, max_bufflen));
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assert(vari);
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max_bufflen += max_bufflen;
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if (MAX_STRLEN < max_bufflen)
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max_bufflen = MAX_STRLEN;
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if (!IS_STP_SPACE_AVAILABLE(max_bufflen))
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{
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v->str.len = bytes_read; /* to keep the data read so far from being garbage collected */
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v->str.addr = (char *)stringpool.free;
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stringpool.free += v->str.len; /* BYPASSOK */
|
|
assert(stringpool.free <= stringpool.top); /* BYPASSOK */
|
|
INVOKE_STP_GCOL(max_bufflen);
|
|
old_stringpool_free = stringpool.free; /* BYPASSOK */
|
|
assert(stringpool.free == (unsigned char *)(v->str.addr + v->str.len)); /* BYPASSOK */
|
|
stringpool.free = (unsigned char *)v->str.addr;
|
|
v->str.len = 0; /* If interrupted, don't hold onto old space */
|
|
TRCTBL_ENTRY(SOCKRFL_EXPBUFGC, bytes_read, stringpool.free, old_stringpool_free, /* BYPASSOK */
|
|
(UINTPTR_T)max_bufflen);
|
|
}
|
|
}
|
|
if (has_delimiter || requeue_done || (socketptr->first_read && (CHSET_M != ichset)))
|
|
{ /* Delimiter scanning needs one char at a time. Question is how big is a char?
|
|
* For the UTF character sets, we have a similar issue (with the same solution) in that
|
|
* we need to make sure the entire BOM we may have is in the buffer. If the last read
|
|
* caused chars to be requeued, we have to make sure that we read in one full character
|
|
* (buffer likely contains only a partial char) in order to make forward progess. If we
|
|
* didn't do this, we would just pull the partial char out of the buffer, notice its incompleteness
|
|
* and requeue it again and again. Forcing a full char read lets us continue past this point.
|
|
*/
|
|
requeue_done = FALSE; /* housekeeping -- We don't want to come back here for this reason
|
|
* until it happens again */
|
|
DBGSOCK_ONLY2(if (socketptr->first_read && (CHSET_M != ichset))
|
|
DBGSOCK((stdout, "socrfl: Prebuffering because ichset = UTF16\n"));
|
|
else
|
|
DBGSOCK((stdout, "socrfl: Prebuffering because we have delimiter or requeue\n")));
|
|
if (CHSET_M == iod->ichset)
|
|
bufflen = 1; /* M mode, 1 char == 1 byte */
|
|
else
|
|
{ /* We need to make sure the read buffer contains a complete UTF character and to make sure
|
|
* we know how long that character is so we can read it completely. The issue is that if we
|
|
* read a partial utf character, the utf checking code below notices this and rebuffers it
|
|
* so that it gets re-read on the next iteration. However, this then re-reads the same
|
|
* partial character and we have a loop. We make a call here which takes a peek at the
|
|
* first byte of the next character (and reads it in if necessary), determines how long the
|
|
* character is and verifies that many characters are available in the buffer and returns the
|
|
* character length to us to use for bufflen.
|
|
*/
|
|
charlen = (int)iosocket_snr_utf_prebuffer(iod, socketptr, 0, &time_for_read,
|
|
(!vari || has_delimiter || 0 == chars_read));
|
|
DBGSOCK((stdout, "socrfl: charlen from iosocket_snr_utf_prebuffer = %d\n", charlen));
|
|
if (0 < charlen)
|
|
{ /* We know how long the next char is. If it fits in our buffer, then it is
|
|
* the correct bufflen. If it won't, our buffer is full and we need to expand.
|
|
*/
|
|
if ((max_bufflen - bytes_read) < charlen)
|
|
{
|
|
DBGSOCK((stdout, "socrfl: Buffer expand2 - max_bufflen(%d) bytes_read(%d)\n",
|
|
max_bufflen, bytes_read));
|
|
assert(vari);
|
|
max_bufflen += max_bufflen;
|
|
if (MAX_STRLEN < max_bufflen)
|
|
max_bufflen = MAX_STRLEN;
|
|
if (!IS_STP_SPACE_AVAILABLE(max_bufflen))
|
|
{
|
|
v->str.len = bytes_read; /* To keep the data read so far from
|
|
* being garbage collected
|
|
*/
|
|
v->str.addr = (char *)stringpool.free;
|
|
stringpool.free += bytes_read;
|
|
assert(stringpool.free <= stringpool.top);
|
|
INVOKE_STP_GCOL(max_bufflen);
|
|
old_stringpool_free = stringpool.free;
|
|
assert(stringpool.free == (unsigned char *)(v->str.addr + v->str.len));
|
|
stringpool.free = (unsigned char *)v->str.addr;
|
|
v->str.len = 0; /* If interrupted, don't hold onto old space */
|
|
TRCTBL_ENTRY(SOCKRFL_EXPBUFGC, bytes_read, stringpool.free, /* BYPASSOK */
|
|
old_stringpool_free, (UINTPTR_T)max_bufflen);
|
|
}
|
|
}
|
|
bufflen = charlen;
|
|
} else if (0 == charlen)
|
|
{ /* No data was available or there was a timeout. We set status to -3 here
|
|
* so that we end up bypassing the call to iosocket_snr below which was to
|
|
* do the actual IO. No need to repeat our lack of IO issue.
|
|
*/
|
|
DBGSOCK((stdout, "socrfl: Timeout or end of data stream\n"));
|
|
status = -3; /* To differentiate from status=0 if prebuffer bypassed */
|
|
DEBUG_ONLY(bufflen = 0); /* Triggers assert in iosocket_snr if we end up there anyway */
|
|
} else
|
|
{ /* Something bad happened. Feed the error to the lower levels for proper handling */
|
|
DBGSOCK((stdout, "socrfl: Read error: status: %d errno: %d\n", charlen, errno));
|
|
status = charlen;
|
|
DEBUG_ONLY(bufflen = 0); /* Triggers assert in iosocket_snr if we end up there anyway */
|
|
}
|
|
}
|
|
} else
|
|
{
|
|
bufflen = max_bufflen - bytes_read;
|
|
DBGSOCK((stdout, "socrfl: Regular read .. bufflen = %d\n", bufflen));
|
|
status = 0;
|
|
}
|
|
buffptr = (stringpool.free + bytes_read);
|
|
terminator = FALSE;
|
|
if (0 <= status)
|
|
/* An IO above in prebuffering may have failed in which case we do not want to reset status */
|
|
status = iosocket_snr(socketptr, buffptr, bufflen, 0, &time_for_read);
|
|
else
|
|
{
|
|
DBGSOCK((stdout, "socrfl: Data read bypassed - status: %d\n", status));
|
|
}
|
|
TRCTBL_ENTRY(SOCKRFL_RDSTATUS, status, (INTPTR_T)outofband, (INTPTR_T)out_of_time, (INTPTR_T)bytes_read);
|
|
if (0 == status || -3 == status) /* -3 status can happen on EOB from prebuffering */
|
|
{
|
|
DBGSOCK((stdout, "socrfl: No more data available\n"));
|
|
more_data = FALSE;
|
|
status = 0; /* Consistent treatment of no more data */
|
|
} else if (0 < status)
|
|
{
|
|
if (timeout && !socketptr->def_moreread_timeout && !one_read_done)
|
|
{
|
|
one_read_done = TRUE;
|
|
DBGSOCK((stdout, "socrfl: before moreread_timeout = %d timeout = %d \n",
|
|
socketptr->moreread_timeout,time_for_read.at_usec));
|
|
time_for_read.at_usec = DEFAULT_MOREREAD_TIMEOUT * 1000;
|
|
DBGSOCK((stdout, "socrfl: after timeout = %d \n",time_for_read.at_usec));
|
|
}
|
|
DBGSOCK((stdout, "socrfl: Bytes read: %d\n", status));
|
|
bytes_read += (int)status;
|
|
UNIX_ONLY(if (iod == io_std_device.out)
|
|
prin_in_dev_failure = FALSE);
|
|
if (socketptr->first_read && (CHSET_M != ichset)) /* May have a BOM to defuse */
|
|
{
|
|
if (CHSET_UTF8 != ichset)
|
|
{ /* When the type is UTF16xx, we need to check for a BOM at the beginning of the file. If
|
|
* found it tells us which of UTF-16BE (default if no BOM) or UTF-16LE mode the data
|
|
* is being written with. The call to iosocket_snr_utf_prebuffer() above should have made
|
|
* sure that there were at least two chars available in the buffer if the char is a BOM.
|
|
*/
|
|
if (UTF16BE_BOM_LEN <= bytes_read) /* All UTF16xx BOM lengths are the same */
|
|
{
|
|
if (0 == memcmp(buffptr, UTF16BE_BOM, UTF16BE_BOM_LEN))
|
|
{
|
|
if (CHSET_UTF16LE == ichset)
|
|
{
|
|
iod->dollar.za = 9;
|
|
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(6) ERR_BOMMISMATCH, 4,
|
|
chset_names[CHSET_UTF16BE].len,
|
|
chset_names[CHSET_UTF16BE].addr,
|
|
chset_names[CHSET_UTF16LE].len,
|
|
chset_names[CHSET_UTF16LE].addr);
|
|
} else
|
|
{
|
|
iod->ichset = ichset = CHSET_UTF16BE;
|
|
bytes_read -= UTF16BE_BOM_LEN; /* Throw way BOM */
|
|
DBGSOCK2((stdout, "socrfl: UTF16BE BOM detected\n"));
|
|
}
|
|
} else if (0 == memcmp(buffptr, UTF16LE_BOM, UTF16LE_BOM_LEN))
|
|
{
|
|
if (CHSET_UTF16BE == ichset)
|
|
{
|
|
iod->dollar.za = 9;
|
|
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(6) ERR_BOMMISMATCH, 4,
|
|
chset_names[CHSET_UTF16LE].len,
|
|
chset_names[CHSET_UTF16LE].addr,
|
|
chset_names[CHSET_UTF16BE].len,
|
|
chset_names[CHSET_UTF16BE].addr);
|
|
} else
|
|
{
|
|
iod->ichset = ichset = CHSET_UTF16LE;
|
|
bytes_read -= UTF16BE_BOM_LEN; /* Throw away BOM */
|
|
DBGSOCK2((stdout, "socrfl: UTF16LE BOM detected\n"));
|
|
}
|
|
} else
|
|
{ /* No BOM specified. If UTF16, default BOM to UTF16BE per Unicode
|
|
* standard
|
|
*/
|
|
if (CHSET_UTF16 == ichset)
|
|
{
|
|
DBGSOCK2((stdout, "socrfl: UTF16BE BOM assumed\n"));
|
|
iod->ichset = ichset = CHSET_UTF16BE;
|
|
}
|
|
}
|
|
} else
|
|
{ /* Insufficient characters to form a BOM so no BOM present. Like above, if in
|
|
* UTF16 mode, default to UTF16BE per the Unicode standard.
|
|
*/
|
|
if (CHSET_UTF16 == ichset)
|
|
{
|
|
DBGSOCK2((stdout, "socrfl: UTF16BE BOM assumed\n"));
|
|
iod->ichset = ichset = CHSET_UTF16BE;
|
|
}
|
|
}
|
|
} else
|
|
{ /* Check for UTF8 BOM. If found, just eliminate it. */
|
|
if ((UTF8_BOM_LEN <= bytes_read) && (0 == memcmp(buffptr, UTF8_BOM, UTF8_BOM_LEN)))
|
|
{
|
|
bytes_read -= UTF8_BOM_LEN; /* Throw way BOM */
|
|
DBGSOCK2((stdout, "socrfl: UTF8 BOM detected/ignored\n"));
|
|
}
|
|
}
|
|
}
|
|
if (socketptr->first_read)
|
|
{
|
|
if ((CHSET_UTF16BE == ichset) || (CHSET_UTF16LE == ichset))
|
|
{
|
|
get_chset_desc(&chset_names[ichset]);
|
|
if (has_delimiter)
|
|
iosocket_delim_conv(socketptr, ichset);
|
|
}
|
|
socketptr->first_read = FALSE;
|
|
}
|
|
if (bytes_read && has_delimiter)
|
|
{ /* Check to see if it is a delimiter */
|
|
DBGSOCK((stdout, "socrfl: Searching for delimiter\n"));
|
|
for (ii = 0; ii < socketptr->n_delimiter; ii++)
|
|
{
|
|
if (bytes_read < socketptr->idelimiter[ii].len)
|
|
continue;
|
|
if (0 == memcmp(socketptr->idelimiter[ii].addr,
|
|
stringpool.free + bytes_read - socketptr->idelimiter[ii].len,
|
|
socketptr->idelimiter[ii].len))
|
|
{
|
|
terminator = TRUE;
|
|
match_delim = ii;
|
|
memcpy(iod->dollar.zb, socketptr->idelimiter[ii].addr,
|
|
MIN(socketptr->idelimiter[ii].len, ESC_LEN - 1));
|
|
iod->dollar.zb[MIN(socketptr->idelimiter[ii].len, ESC_LEN - 1)] = '\0';
|
|
memcpy(iod->dollar.key, socketptr->idelimiter[ii].addr,
|
|
MIN(socketptr->idelimiter[ii].len, DD_BUFLEN - 1));
|
|
iod->dollar.key[MIN(socketptr->idelimiter[ii].len, DD_BUFLEN - 1)] = '\0';
|
|
break;
|
|
}
|
|
}
|
|
DBGSOCK_ONLY2(
|
|
if (terminator)
|
|
DBGSOCK((stdout, "socrfl: Delimiter found - match_delim: %d\n", match_delim));
|
|
else
|
|
DBGSOCK((stdout, "socrfl: Delimiter not found\n"));
|
|
);
|
|
}
|
|
if (!terminator)
|
|
more_data = TRUE;
|
|
} else if ((EINTR == errno) && !out_of_time) /* Unrelated timer popped */
|
|
{
|
|
status = 0;
|
|
continue;
|
|
} else
|
|
{
|
|
real_errno = errno;
|
|
break;
|
|
}
|
|
if (bytes_read > MAX_STRLEN)
|
|
{
|
|
iod->dollar.za = 9;
|
|
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_MAXSTRLEN);
|
|
}
|
|
orig_bytes_read = bytes_read;
|
|
if (0 != bytes_read)
|
|
{ /* Find n chars read from [buffptr, buffptr + bytes_read) */
|
|
DBGSOCK((stdout, "socrfl: Start char scan - c_ptr: 0x"lvaddr" c_top: 0x"lvaddr"\n",
|
|
buffptr, (buffptr + status)));
|
|
for (c_ptr = buffptr, c_top = buffptr + status;
|
|
c_ptr < c_top && chars_read < width;
|
|
c_ptr += mb_len, chars_read++)
|
|
{
|
|
mb_len = 1; /* In case of CHSET_M */
|
|
if (!((CHSET_M == ichset) ? 1 :
|
|
(CHSET_UTF8 == ichset) ? UTF8_VALID(c_ptr, c_top, mb_len) :
|
|
(CHSET_UTF16BE == ichset) ? UTF16BE_VALID(c_ptr, c_top, mb_len) :
|
|
UTF16LE_VALID(c_ptr, c_top, mb_len)))
|
|
{ /* This char is not valid unicode but this is only an error if entire char is
|
|
* in the buffer. Else we ignore it and it is rebuffered further down.
|
|
* First, we need to find its (real) length as xx_VALID set it to one when it
|
|
* was determined to be invalid.
|
|
*/
|
|
mb_len = (CHSET_M == ichset) ? 0 :
|
|
(CHSET_UTF8 == ichset) ? UTF8_MBFOLLOW(c_ptr) :
|
|
(CHSET_UTF16BE == ichset) ? UTF16BE_MBFOLLOW(c_ptr, c_top) :
|
|
UTF16LE_MBFOLLOW(c_ptr, c_top);
|
|
mb_len++; /* Account for first byte of char */
|
|
if ((0 == mb_len) || ((c_ptr + mb_len) <= c_top))
|
|
{ /* The entire char is in the buffer.. badchar */
|
|
# ifdef UNICODE_SUPPORTED
|
|
if (CHSET_UTF8 == ichset)
|
|
{
|
|
iosocket_readfl_badchar(v, (int)((unsigned char *)c_ptr - stringpool.free),
|
|
0, c_ptr, c_top);
|
|
UTF8_BADCHAR(0, c_ptr, c_top, 0, NULL);
|
|
} else /* UTF16LE or UTF16BE */
|
|
{
|
|
inv_beg = c_ptr;
|
|
if ((c_ptr += 2) >= c_top)
|
|
c_ptr = c_top;
|
|
iosocket_readfl_badchar(v,
|
|
(int)((unsigned char *)inv_beg - stringpool.free),
|
|
(int)(c_ptr - inv_beg), inv_beg, c_top);
|
|
UTF8_BADCHAR((int)(c_ptr - inv_beg), inv_beg, c_top,
|
|
chset_names[ichset].len, chset_names[ichset].addr);
|
|
}
|
|
# endif
|
|
}
|
|
}
|
|
if ((c_ptr + mb_len) > c_top) /* Verify entire char is in buffer */
|
|
break;
|
|
}
|
|
DBGSOCK((stdout, "socrfl: End char scan - c_ptr: 0x"lvaddr" c_top: 0x"lvaddr"\n", c_ptr, c_top));
|
|
if (c_ptr < c_top) /* Width size READ completed OR partial last char, push back bytes into input buffer */
|
|
{
|
|
iosocket_unsnr(socketptr, c_ptr, c_top - c_ptr);
|
|
bytes_read -= (int)(c_top - c_ptr); /* We will be re-reading these bytes */
|
|
requeue_done = TRUE; /* Force single (full) char read next time through */
|
|
DBGSOCK((stdout, "socrfl: Requeue of %d bytes done - adjusted bytes_read: %d\n",
|
|
(c_top - c_ptr), bytes_read));
|
|
}
|
|
}
|
|
if (terminator)
|
|
{
|
|
assert(0 < bytes_read);
|
|
bytes_read -= socketptr->idelimiter[match_delim].len;
|
|
c_ptr -= socketptr->idelimiter[match_delim].len;
|
|
UNICODE_ONLY(chars_read -= socketptr->idelimiter[match_delim].char_len);
|
|
NON_UNICODE_ONLY(chars_read = bytes_read);
|
|
DBGSOCK((stdout, "socrfl: Terminator found - bytes_read reduced by %d bytes to %d\n",
|
|
socketptr->idelimiter[match_delim].len, bytes_read));
|
|
DBGSOCK((stdout, "socrfl: .. c_ptr also reduced to 0x"lvaddr"\n", c_ptr));
|
|
}
|
|
/* If we read as much as we needed or if the buffer was totally full (last char or 3 might be part of an
|
|
* incomplete character than can never be completed in this buffer) or if variable length, no delim with
|
|
* chars available and no more data or outofband or have data including a terminator, we are then done. Note
|
|
* that we are explicitly not handling jobinterrupt outofband here because it is handled above where it needs
|
|
* to be done to be able to cleanly requeue any input (before delimiter procesing).
|
|
*/
|
|
if ((chars_read >= width) ||
|
|
(MAX_STRLEN <= orig_bytes_read) ||
|
|
(vari && !has_delimiter && (0 != chars_read) && !more_data) ||
|
|
((0 < status) && terminator))
|
|
break;
|
|
if (0 != outofband)
|
|
{
|
|
outofband_terminate = TRUE;
|
|
break;
|
|
}
|
|
if (timed)
|
|
{
|
|
if (0 < msec_timeout)
|
|
{
|
|
sys_get_curr_time(&cur_time);
|
|
cur_time = sub_abs_time(&end_time, &cur_time);
|
|
if (0 > cur_time.at_sec)
|
|
{
|
|
out_of_time = TRUE;
|
|
cancel_timer(timer_id);
|
|
DBGSOCK((stdout, "socrfl: Out of time detected and set\n"));
|
|
break;
|
|
}
|
|
} else if (!more_data)
|
|
break;
|
|
}
|
|
}
|
|
if (EINTR == real_errno)
|
|
status = 0; /* Don't treat a <CTRL-C> or timeout as an error */
|
|
if (timed)
|
|
{
|
|
if (0 < msec_timeout)
|
|
{
|
|
# ifdef UNIX
|
|
FCNTL3(socketptr->sd, F_SETFL, flags, fcntl_res);
|
|
if (fcntl_res < 0)
|
|
{
|
|
iod->dollar.za = 9;
|
|
save_errno = errno;
|
|
errptr = (char *)STRERROR(errno);
|
|
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(7) ERR_SETSOCKOPTERR, 5,
|
|
LEN_AND_LIT("F_SETFL FOR RESTORING SOCKET OPTIONS"),
|
|
save_errno, LEN_AND_STR(errptr));
|
|
}
|
|
# endif
|
|
if (out_of_time)
|
|
{
|
|
ret = FALSE;
|
|
DBGSOCK((stdout, "socrfl: Out of time to be returned (1)\n"));
|
|
} else
|
|
cancel_timer(timer_id);
|
|
} else if ((chars_read < width) && !(has_delimiter && terminator))
|
|
{
|
|
ret = FALSE;
|
|
DBGSOCK((stdout, "socrfl: Out of time to be returned (2)\n"));
|
|
}
|
|
}
|
|
/* If we terminated due to outofband, set up restart info. We may or may not restart (any outofband is capable of
|
|
* restart) but set it up for at least the more common reasons (^C and job interrupt).
|
|
*
|
|
* Some restart info is kept in our iodesc block, but the buffer address information is kept in an mv_stent so if
|
|
* the stack is garbage collected during the interrupt we don't lose track of where our stuff is saved away.
|
|
*/
|
|
if (outofband_terminate)
|
|
{
|
|
DBGSOCK((stdout, "socrfl: outofband interrupt received (%d) -- queueing mv_stent for read intr\n", outofband));
|
|
PUSH_MV_STENT(MVST_ZINTDEV);
|
|
mv_chain->mv_st_cont.mvs_zintdev.io_ptr = iod;
|
|
mv_chain->mv_st_cont.mvs_zintdev.buffer_valid = TRUE;
|
|
mv_chain->mv_st_cont.mvs_zintdev.curr_sp_buffer.addr = (char *)stringpool.free;
|
|
mv_chain->mv_st_cont.mvs_zintdev.curr_sp_buffer.len = bytes_read;
|
|
sockintr->who_saved = sockwhich_readfl;
|
|
if ((0 < msec_timeout) && (NO_M_TIMEOUT != msec_timeout))
|
|
{
|
|
sockintr->end_time = end_time;
|
|
sockintr->end_time_valid = TRUE;
|
|
cancel_timer(timer_id); /* Worry about timer if/when we come back */
|
|
}
|
|
sockintr->max_bufflen = max_bufflen;
|
|
sockintr->bytes_read = bytes_read;
|
|
sockintr->chars_read = chars_read;
|
|
dsocketptr->mupintr = TRUE;
|
|
stringpool.free += bytes_read; /* Don't step on our parade in the interrupt */
|
|
socketus_interruptus++;
|
|
DBGSOCK((stdout, "socrfl: .. mv_stent: bytes_read: %d chars_read: %d max_bufflen: %d "
|
|
"interrupts: %d buffer_start: 0x"lvaddr"\n",
|
|
bytes_read, chars_read, max_bufflen, socketus_interruptus, stringpool.free));
|
|
DBGSOCK_ONLY(if (sockintr->end_time_valid) DBGSOCK((stdout, "socrfl: .. endtime: %d/%d timeout: %d "
|
|
"msec_timeout: %d\n", end_time.at_sec, end_time.at_usec,
|
|
timeout, msec_timeout)));
|
|
TRCTBL_ENTRY(SOCKRFL_OUTOFBAND, bytes_read, (INTPTR_T)chars_read, stringpool.free, NULL); /* BYPASSOK */
|
|
outofband_action(FALSE);
|
|
GTMASSERT; /* Should *never* return from outofband_action */
|
|
return FALSE; /* For the compiler.. */
|
|
}
|
|
if (0 < chars_read)
|
|
{ /* There's something to return. Note we do not assert anything using c_ptr as it is possible in a restarted
|
|
* read with nearly immediate timeout to bypass setting c_ptr so its value is not dependable at this point.
|
|
*/
|
|
assert(0 <= bytes_read);
|
|
v->str.len = bytes_read;
|
|
v->str.addr = (char *)stringpool.free;
|
|
UNICODE_ONLY(v->str.char_len = chars_read);
|
|
DBGSOCK((stdout, "socrfl: String to return bytelen: %d charlen: %d iod-width: %d wrap: %d\n",
|
|
v->str.len, chars_read, iod->width, iod->wrap));
|
|
DBGSOCK((stdout, "socrfl: x: %d y: %d\n", iod->dollar.x, iod->dollar.y));
|
|
if (((iod->dollar.x += chars_read) >= iod->width) && iod->wrap) /* Note increment/assignment */
|
|
{
|
|
iod->dollar.y += (iod->dollar.x / iod->width);
|
|
if (0 != iod->length)
|
|
iod->dollar.y %= iod->length;
|
|
iod->dollar.x %= iod->width;
|
|
}
|
|
if ((CHSET_M != ichset) && (CHSET_UTF8 != ichset))
|
|
{
|
|
DBGSOCK((stdout, "socrfl: Converting UTF16xx data back to UTF8 for internal use\n"));
|
|
v->str.len = gtm_conv(chset_desc[ichset], chset_desc[CHSET_UTF8], &v->str, NULL, NULL);
|
|
v->str.addr = (char *)stringpool.free;
|
|
stringpool.free += v->str.len;
|
|
}
|
|
|
|
} else
|
|
{
|
|
v->str.len = 0;
|
|
v->str.addr = iod->dollar.key;
|
|
}
|
|
if (status >= 0)
|
|
{ /* No real problems */
|
|
iod->dollar.zeof = FALSE;
|
|
iod->dollar.za = 0;
|
|
memcpy(iod->dollar.device, "0", SIZEOF("0"));
|
|
} else
|
|
{ /* There's a significant problem */
|
|
DBGSOCK((stdout, "socrfl: Error handling triggered - status: %d\n", status));
|
|
if (0 == chars_read)
|
|
iod->dollar.x = 0;
|
|
iod->dollar.za = 9;
|
|
len = SIZEOF(ONE_COMMA) - 1;
|
|
memcpy(iod->dollar.device, ONE_COMMA, len);
|
|
errptr = (char *)STRERROR(real_errno);
|
|
errlen = STRLEN(errptr);
|
|
memcpy(&iod->dollar.device[len], errptr, errlen + 1); /* + 1 for null */
|
|
# ifdef UNIX
|
|
if (io_curr_device.in == io_std_device.in)
|
|
{
|
|
if (!prin_in_dev_failure)
|
|
prin_in_dev_failure = TRUE;
|
|
else
|
|
{
|
|
send_msg_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_NOPRINCIO);
|
|
stop_image_no_core();
|
|
}
|
|
}
|
|
# endif
|
|
if (iod->dollar.zeof || -1 == status || 0 < iod->error_handler.len)
|
|
{
|
|
iod->dollar.zeof = TRUE;
|
|
if (socketptr->ioerror)
|
|
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(6) ERR_IOEOF, 0, ERR_TEXT, 2, errlen, errptr);
|
|
} else
|
|
iod->dollar.zeof = TRUE;
|
|
}
|
|
DBGSOCK_ONLY(
|
|
if (!ret && out_of_time)
|
|
{
|
|
DBGSOCK((stdout, "socrfl: Returning from read due to timeout\n"));
|
|
} else
|
|
{
|
|
DBGSOCK((stdout, "socrfl: Returning from read with success indicator set to %d\n", ret));
|
|
}
|
|
);
|
|
return (ret);
|
|
}
|