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/**
* Copyright © 2014-2015 VideoLabs SAS
*
* Author: Jonathan Calmels <jbjcalmels@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <errno.h>
#include <string.h>
#include "compat.h"
#include "utils.h"
#if defined (__unix__) || defined (__APPLE__)
struct timeval os_deadline = {
.tv_sec = 0,
.tv_usec = 100000,
};
#endif // __unix__ || (__APPLE__)
#if defined (_WIN32)
uint32_t os_deadline = 1000;
#include <winapifamily.h>
#endif // _WIN32
int
os_strerror(int errnum, char *buf, size_t buflen)
{
int r = 0;
if (buflen == 0)
return -1;
buf[0] = '\0';
switch (errnum) {
#if defined (_WIN32)
case MDNS_NETERR:
errno = WSAGetLastError();
// fallthrough
case MDNS_STDERR:
{
wchar_t* wbuff = malloc(sizeof(*wbuff) * buflen);
if (wbuff == NULL)
return (-1);
DWORD nbChar = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
NULL, errno, 0, wbuff, buflen, NULL);
if (!nbChar)
{
snprintf(buf, buflen, "Error %d\n", errno);
r = -1;
}
else
nbChar = WideCharToMultiByte(CP_UTF8, 0, wbuff, nbChar,
buf, buflen, NULL, NULL);
free(wbuff);
break;
}
#if WINAPI_FAMILY_PARTITION (WINAPI_PARTITION_DESKTOP) || _WIN32_WINNT >= 0x0A00
case MDNS_LKPERR:
{
// Win32 gai_strerror returns a static buffer, but as a non-const char*
WCHAR *s = gai_strerror(errno);
if (!WideCharToMultiByte(CP_UTF8, 0, s, -1, buf, buflen, NULL, NULL))
return (-1);
break;
}
#endif
#else
case MDNS_STDERR:
case MDNS_NETERR:
if (strerror_r(errno, buf, buflen) != 0)
return (-1);
break;
case MDNS_LKPERR: {
const char *s;
s = gai_strerror(errno);
if ( s == NULL )
return (-1);
strncpy(buf, s, buflen);
buf[buflen - 1] = '\0';
break;
}
#endif
default:
r = -1;
}
return (r);
}
int
os_mcast_join(sock_t s, const struct sockaddr_storage *ss, uint32_t intf_idx,
const struct sockaddr_storage* intf_addr)
{
#ifdef MCAST_JOIN_GROUP
(void)intf_addr;
struct group_req mgroup;
memset(&mgroup, 0, sizeof(mgroup));
mgroup.gr_interface = intf_idx;
memcpy(&mgroup.gr_group, ss, ss_len(ss));
if (setsockopt(s, ss_level(ss), MCAST_JOIN_GROUP,
(const void *) &mgroup, sizeof(mgroup)) < 0)
return (-1);
#else
union {
struct sockaddr_storage ss;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} u;
memcpy(&u, ss, sizeof(*ss));
switch (ss_family(ss)) {
case AF_INET: {
struct ip_mreq mreq;
const struct sockaddr_in* sin = (const struct sockaddr_in*)intf_addr;
memcpy(&mreq.imr_multiaddr.s_addr, &u.sin.sin_addr, sizeof(struct in_addr));
memcpy(&mreq.imr_interface, &sin->sin_addr, sizeof(sin->sin_addr));
if (setsockopt(s, ss_level(ss), IP_ADD_MEMBERSHIP,
(const void *) &mreq, sizeof(mreq)) < 0)
return (-1);
break;
}
case AF_INET6: {
struct ipv6_mreq mreq6;
memcpy(&mreq6.ipv6mr_multiaddr, &u.sin6.sin6_addr, sizeof(struct in6_addr));
memcpy(&mreq6.ipv6mr_interface, &intf_idx, sizeof(intf_idx));
if (setsockopt(s, ss_level(ss), IPV6_JOIN_GROUP,
(const void *) &mreq6, sizeof(mreq6)) < 0)
return (-1);
break;
}
default:
assert(1);
}
#endif
return (0);
}
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