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can-utils
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Allow SLCAN RTR frames without data length code field.

pull/7/head
Oliver Hartkopp 2009-02-04 16:51:04 +00:00
parent 6cc05e08f0
commit c588f0d0b2
1 changed files with 48 additions and 27 deletions
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75
slcanpty.c
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@ -174,10 +174,11 @@ rx_restart:
nbytes--;
}
if (nbytes < 2)
if (!nbytes)
continue;
rxcmd = rxbuf[0];
rxbuf[nbytes] = 0;
#ifdef DEBUG
for (tmp = 0; tmp < nbytes; tmp++)
@ -302,37 +303,57 @@ rx_restart:
else
rxp = 9; /* dlc position Tiiiiiiiid */
if (!((rxbuf[rxp] >= '0') && (rxbuf[rxp] < '9')))
goto rx_out_nack;
rxf.can_dlc = rxbuf[rxp] & 0x0F; /* get can_dlc */
rxbuf[rxp] = 0; /* terminate can_id string */
rxf.can_id = strtoul(rxbuf+1, NULL, 16);
if (!(rxcmd & 0x20)) /* NO tiny chars => EFF */
rxf.can_id |= CAN_EFF_FLAG;
if ((rxcmd | 0x20) == 'r') /* RTR frame */
rxf.can_id |= CAN_RTR_FLAG;
*(unsigned long long *) (&rxf.data) = 0ULL; /* clear */
for (i = 0, rxp++; i < rxf.can_dlc; i++) {
if ((rxcmd | 0x20) == 'r' && rxbuf[rxp] != '0') {
/* RTR frame without dlc information */
tmp = asc2nibble(rxbuf[rxp++]);
if (tmp > 0x0F)
rxf.can_dlc = rxbuf[rxp]; /* save */
rxbuf[rxp] = 0; /* terminate can_id string */
rxf.can_id = strtoul(rxbuf+1, NULL, 16);
rxf.can_id |= CAN_RTR_FLAG;
if (!(rxcmd & 0x20)) /* NO tiny chars => EFF */
rxf.can_id |= CAN_EFF_FLAG;
rxbuf[rxp] = rxf.can_dlc; /* restore */
rxf.can_dlc = 0;
rxp--; /* we have no dlc component here */
} else {
if (!(rxbuf[rxp] >= '0' && rxbuf[rxp] < '9'))
goto rx_out_nack;
rxf.data[i] = (tmp << 4);
tmp = asc2nibble(rxbuf[rxp++]);
if (tmp > 0x0F)
goto rx_out_nack;
rxf.data[i] |= tmp;
rxf.can_dlc = rxbuf[rxp] & 0x0F; /* get dlc */
rxbuf[rxp] = 0; /* terminate can_id string */
rxf.can_id = strtoul(rxbuf+1, NULL, 16);
if (!(rxcmd & 0x20)) /* NO tiny chars => EFF */
rxf.can_id |= CAN_EFF_FLAG;
if ((rxcmd | 0x20) == 'r') /* RTR frame */
rxf.can_id |= CAN_RTR_FLAG;
for (i = 0, rxp++; i < rxf.can_dlc; i++) {
tmp = asc2nibble(rxbuf[rxp++]);
if (tmp > 0x0F)
goto rx_out_nack;
rxf.data[i] = (tmp << 4);
tmp = asc2nibble(rxbuf[rxp++]);
if (tmp > 0x0F)
goto rx_out_nack;
rxf.data[i] |= tmp;
}
/* point to last real data */
if (rxf.can_dlc)
rxp--;
}
/* point to last real data */
if (rxf.can_dlc)
rxp--;
nbytes = write(s, &rxf, sizeof(rxf));
if (nbytes != sizeof(rxf)) {