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bind 8 #734: linux only fills in as many entries as will fill the buffer with SIOCGIFCONF

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This commit is contained in:
Andreas Gustafsson 1999-08-18 05:00:52 +00:00
parent 9d308c6236
commit b97feea8fd
1 changed files with 13 additions and 1 deletions
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14
lib/isc/unix/ifiter_ioctl.c
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@ -86,7 +86,19 @@ isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp)
iter->ifc.ifc_len = iter->bufsize;
iter->ifc.ifc_buf = iter->buf;
if (ioctl(iter->socket, SIOCGIFCONF, (char *) &iter->ifc) >= 0)
break;
{
/*
* Some OS's just return what will fit rather
* than set EINVAL if the buffer is too small
* to fit all the interfaces in. If
* ifc.ifc_len is too near to the end of the
* buffer we will grow it just in case and
* retry.
*/
if (iter->ifc.ifc_len + 2 * sizeof(struct ifreq)
< iter->bufsiz)
break;
}
if (errno != EINVAL) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"get interface configuration: %s",