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freetdm: ftmod_libpri + ftmod_zt: some DAHDI drivers return an error of ELAST (500) on read()/write() to indicate there are events pending.

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Fixup zt_read() to handle this case correctly and rework ftmod_libpri's read wrapper function to not fail when the read function returns zero bytes.

NOTE: zt_write() has not been changed (some better way to handle these events is needed then)

This should fix these log messages:

   [WARNING] ftdm_io.c:3561 [s1c16][1:16] raw I/O read filed
   [CRIT] lpwrap_pri.c:125 span 1 D-READ FAIL! []
   [CRIT] lpwrap_pri.c:157 span 1 D-WRITE FAIL! []
   [ERR] ftmod_libpri.c:131 Short write: -1/6 (Unknown error 500)

Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>
This commit is contained in:
Stefan Knoblich 2010-12-07 20:06:48 +01:00
parent 6a36b8f33f
commit 60cb91b042
2 changed files with 28 additions and 14 deletions
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3
libs/freetdm/src/ftmod/ftmod_libpri/lpwrap_pri.c
View File

@ -134,9 +134,9 @@ static int __pri_lpwrap_read(struct pri *pri, void *buf, int buflen)
spri->errs = 0; spri->errs = 0;
res = (int)len; res = (int)len;
if (res > 0) {
memset(&((unsigned char*)buf)[res], 0, 2); memset(&((unsigned char*)buf)[res], 0, 2);
res += 2; res += 2;
#ifdef IODEBUG #ifdef IODEBUG
{ {
char bb[2048] = { 0 }; char bb[2048] = { 0 };
@ -145,6 +145,7 @@ static int __pri_lpwrap_read(struct pri *pri, void *buf, int buflen)
ftdm_log(FTDM_LOG_DEBUG, "READ %d\n", res - 2); ftdm_log(FTDM_LOG_DEBUG, "READ %d\n", res - 2);
} }
#endif #endif
}
return res; return res;
} }

23
libs/freetdm/src/ftmod/ftmod_zt/ftmod_zt.c
View File

@ -35,6 +35,11 @@
#include "private/ftdm_core.h" #include "private/ftdm_core.h"
#include "ftmod_zt.h" #include "ftmod_zt.h"
/* used by dahdi to indicate there is no data available, but events to read */
#ifndef ELAST
#define ELAST 500
#endif
/** /**
* \brief Zaptel globals * \brief Zaptel globals
*/ */
@ -1081,7 +1086,6 @@ FIO_SPAN_NEXT_EVENT_FUNCTION(zt_next_event)
} }
return FTDM_FAIL; return FTDM_FAIL;
} }
/** /**
@ -1100,12 +1104,19 @@ static FIO_READ_FUNCTION(zt_read)
if ((r = read(ftdmchan->sockfd, data, *datalen)) > 0) { if ((r = read(ftdmchan->sockfd, data, *datalen)) > 0) {
break; break;
} }
else if (r == 0) {
ftdm_sleep(10); ftdm_sleep(10);
if (r == 0) { if (errs) errs--;
errs--;
}
} }
else {
if (errno == EAGAIN || errno == EINTR)
continue;
if (errno == ELAST)
break;
ftdm_log(FTDM_LOG_ERROR, "read failed: %s\n", strerror(errno));
}
}
if (r > 0) { if (r > 0) {
*datalen = r; *datalen = r;
if (ftdmchan->type == FTDM_CHAN_TYPE_DQ921) { if (ftdmchan->type == FTDM_CHAN_TYPE_DQ921) {
@ -1113,7 +1124,9 @@ static FIO_READ_FUNCTION(zt_read)
} }
return FTDM_SUCCESS; return FTDM_SUCCESS;
} }
else if (errno == ELAST) {
return FTDM_SUCCESS;
}
return r == 0 ? FTDM_TIMEOUT : FTDM_FAIL; return r == 0 ? FTDM_TIMEOUT : FTDM_FAIL;
} }