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Fix getifaddrs for non-English interface names on Windows

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ddsrt_asprintf did not copy non-English interface names. To fix this memory is
allocated with ddsrt_malloc and UTF-16 encoded interface names are converted to
UTF-8.

Signed-off-by: Jeroen Koekkoek <jeroen@koekkoek.nl>
This commit is contained in:
Jeroen Koekkoek 2020-02-12 20:15:57 +01:00
parent 80ed351efd
commit bf3d1bc270
1 changed files with 48 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

68
src/ddsrt/src/ifaddrs/windows/ifaddrs.c
View file

@ -167,14 +167,37 @@ guess_iftype (const PIP_ADAPTER_ADDRESSES iface)
}
}
static int
static dds_return_t
copyname(const wchar_t *wstr, char **strp)
{
int cnt, len;
char buf[1], *str;
len = WideCharToMultiByte(
CP_UTF8, WC_ERR_INVALID_CHARS, wstr, -1, buf, 0, NULL, NULL);
if (len == 0) {
return DDS_RETCODE_BAD_PARAMETER;
} else if ((str = ddsrt_malloc_s(len)) == NULL) {
return DDS_RETCODE_OUT_OF_RESOURCES;
}
cnt = WideCharToMultiByte(
CP_UTF8, WC_ERR_INVALID_CHARS, wstr, -1, str, len, NULL, NULL);
assert(cnt == len);
assert(str[len - 1] == '\0');
*strp = str;
return DDS_RETCODE_OK;
}
static dds_return_t
copyaddr(
ddsrt_ifaddrs_t **ifap,
const PIP_ADAPTER_ADDRESSES iface,
const PMIB_IPADDRTABLE addrtable,
const PIP_ADAPTER_UNICAST_ADDRESS addr)
{
dds_return_t err = DDS_RETCODE_OK;
dds_return_t rc = DDS_RETCODE_OK;
ddsrt_ifaddrs_t *ifa;
struct sockaddr *sa;
size_t sz;
@ -187,15 +210,17 @@ copyaddr(
sz = (size_t)addr->Address.iSockaddrLength;
if ((ifa = ddsrt_calloc_s(1, sizeof(*ifa))) == NULL) {
err = DDS_RETCODE_OUT_OF_RESOURCES;
rc = DDS_RETCODE_OUT_OF_RESOURCES;
} else {
ifa->flags = getflags(iface);
ifa->type = guess_iftype(iface);
ifa->addr = ddsrt_memdup(sa, sz);
(void)ddsrt_asprintf(&ifa->name, "%wS", iface->FriendlyName);
if (ifa->addr == NULL || ifa->name == NULL) {
err = DDS_RETCODE_OUT_OF_RESOURCES;
} else if (ifa->addr->sa_family == AF_INET6) {
if ((ifa->addr = ddsrt_memdup(sa, sz)) == NULL) {
rc = DDS_RETCODE_OUT_OF_RESOURCES;
} else {
rc = copyname(iface->FriendlyName, &ifa->name);
}
if (ifa->addr->sa_family == AF_INET6) {
ifa->index = iface->Ipv6IfIndex;
/* Address is not in addrtable if the interface is not connected. */
@ -222,18 +247,18 @@ copyaddr(
if ((ifa->netmask = ddsrt_memdup(&nm, sz)) == NULL ||
(ifa->broadaddr = ddsrt_memdup(&bc, sz)) == NULL)
{
err = DDS_RETCODE_OUT_OF_RESOURCES;
rc = DDS_RETCODE_OUT_OF_RESOURCES;
}
}
}
if (err == 0) {
if (rc == DDS_RETCODE_OK) {
*ifap = ifa;
} else {
ddsrt_freeifaddrs(ifa);
}
return err;
return rc;
}
dds_return_t
@ -241,7 +266,7 @@ ddsrt_getifaddrs(
ddsrt_ifaddrs_t **ifap,
const int *afs)
{
int err = 0;
dds_return_t rc = DDS_RETCODE_OK;
int use;
PIP_ADAPTER_ADDRESSES ifaces = NULL, iface;
PIP_ADAPTER_UNICAST_ADDRESS addr = NULL;
@ -257,12 +282,15 @@ ddsrt_getifaddrs(
ifa = ifa_root = ifa_next = NULL;
if ((err = getifaces(&ifaces)) == DDS_RETCODE_OK &&
(err = getaddrtable(&addrtable)) == DDS_RETCODE_OK)
if ((rc = getifaces(&ifaces)) == DDS_RETCODE_OK &&
(rc = getaddrtable(&addrtable)) == DDS_RETCODE_OK)
{
for (iface = ifaces; !err && iface != NULL; iface = iface->Next) {
for (iface = ifaces;
iface != NULL && rc == DDS_RETCODE_OK;
iface = iface->Next)
{
for (addr = iface->FirstUnicastAddress;
addr != NULL;
addr != NULL && rc == DDS_RETCODE_OK;
addr = addr->Next)
{
sa = (struct sockaddr *)addr->Address.lpSockaddr;
@ -272,8 +300,8 @@ ddsrt_getifaddrs(
}
if (use) {
err = copyaddr(&ifa_next, iface, addrtable, addr);
if (err == DDS_RETCODE_OK) {
rc = copyaddr(&ifa_next, iface, addrtable, addr);
if (rc == DDS_RETCODE_OK) {
if (ifa == NULL) {
ifa = ifa_root = ifa_next;
} else {
@ -289,11 +317,11 @@ ddsrt_getifaddrs(
ddsrt_free(ifaces);
ddsrt_free(addrtable);
if (err == DDS_RETCODE_OK) {
if (rc == DDS_RETCODE_OK) {
*ifap = ifa_root;
} else {
ddsrt_freeifaddrs(ifa_root);
}
return err;
return rc;
}