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Comment about unavoidable HP/UX compiler warning:

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warning 541: Integer overflow during conversion.
when their own SIO* macros are used in ioctl calls.
This commit is contained in:
David Lawrence
2000-05-08 23:36:19 +00:00
parent f17b62a64b
commit 8b9ad57c12
1 changed files with 47 additions and 13 deletions
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60
lib/isc/unix/ifiter_ioctl.c
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@@ -68,8 +68,7 @@ struct isc_interfaceiter {
#define IFCONF_BUFSIZE_MAX 1048576
isc_result_t
isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp)
{
isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp) {
isc_interfaceiter_t *iter;
isc_result_t result;
@@ -84,7 +83,9 @@ isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp)
iter->mctx = mctx;
iter->buf = NULL;
/* Create an unbound datagram socket to do the SIOCGLIFADDR ioctl on. */
/*
* Create an unbound datagram socket to do the SIOCGLIFADDR ioctl on.
*/
if ((iter->socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"making interface scan socket: %s",
@@ -115,15 +116,23 @@ isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp)
#endif
iter->ifc.lifc_len = iter->bufsize;
iter->ifc.lifc_buf = iter->buf;
if (ioctl(iter->socket, SIOCGLIFCONF, (char *) &iter->ifc) == -1) {
/*
* Ignore the HP/UX warning about "interger overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket, SIOCGLIFCONF, (char *)&iter->ifc)
== -1) {
if (errno != EINVAL) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"get interface configuration: %s",
"get interface configuration: %s",
strerror(errno));
result = ISC_R_UNEXPECTED;
goto ioctl_failure;
}
/* EINVAL. Retry with a bigger buffer. */
/*
* EINVAL. Retry with a bigger buffer.
*/
} else {
/*
* The ioctl succeeded.
@@ -207,10 +216,17 @@ internal_current(isc_interfaceiter_t *iter) {
get_addr(family, &iter->current.address,
(struct sockaddr *)&lifreq.lifr_addr);
/* Get interface flags. */
/*
* Get interface flags.
*/
iter->current.flags = 0;
/*
* Ignore the HP/UX warning about "interger overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket, SIOCGLIFFLAGS, (char *) &lifreq) < 0) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"%s: getting interface flags: %s",
@@ -228,9 +244,17 @@ internal_current(isc_interfaceiter_t *iter) {
if ((lifreq.lifr_flags & IFF_LOOPBACK) != 0)
iter->current.flags |= INTERFACE_F_LOOPBACK;
/* If the interface is point-to-point, get the destination address. */
/*
* If the interface is point-to-point, get the destination address.
*/
if ((iter->current.flags & INTERFACE_F_POINTTOPOINT) != 0) {
if (ioctl(iter->socket, SIOCGLIFDSTADDR, (char *) &lifreq) < 0) {
/*
* Ignore the HP/UX warning about "interger overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket, SIOCGLIFDSTADDR, (char *)&lifreq)
< 0) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"%s: getting destination address: %s",
lifreq.lifr_name,
@@ -241,12 +265,20 @@ internal_current(isc_interfaceiter_t *iter) {
(struct sockaddr *)&lifreq.lifr_dstaddr);
}
/* Get the network mask. */
/*
* Get the network mask.
*/
memset(&lifreq, 0, sizeof lifreq);
memcpy(&lifreq, ifrp, sizeof lifreq);
switch (family) {
case AF_INET:
if (ioctl(iter->socket, SIOCGLIFNETMASK, (char *) &lifreq) < 0) {
/*
* Ignore the HP/UX warning about "interger overflow during
* conversion. It comes from its own macro definition,
* and is really hard to shut up.
*/
if (ioctl(iter->socket, SIOCGLIFNETMASK, (char *)&lifreq)
< 0) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"%s: getting netmask: %s",
lifreq.lifr_name,
@@ -260,7 +292,9 @@ internal_current(isc_interfaceiter_t *iter) {
#ifdef lifr_addrlen
int i, bits;
/* netmask already zeroed */
/*
* Netmask already zeroed.
*/
iter->current.netmask.family = family;
for (i = 0 ; i < lifreq.lifr_addrlen; i += 8) {
bits = lifreq.lifr_addrlen - i;
@@ -270,7 +304,7 @@ internal_current(isc_interfaceiter_t *iter) {
}
#endif
break;
}
}
}
return (ISC_R_SUCCESS);