bool ParseIPv4(char *str, uint32_t *out_addr, char **next /*NULL*/)
{
return ParseIPv4(const_cast<const char *>(str),
out_addr,
const_cast<const char **>(next)
);
}
bool sockAddrBase::FromString(const char *str)
{
// This is called from the constructor, so it must work with an uninitialized
// structure.
init(Addr::Invalid);
// First determine if it is IPv4 or IPv6
str = SkipWhite(str);
const char *firstColon = strchr(str, ':');
const char *firstDot = strchr(str, '.');
const char *firstPercent = strchr(str, '%');
if (!firstDot && !firstColon)
return false;
if (!firstColon
|| (firstDot && firstDot < firstColon))
{
// IPv4
uint16_t port;
uint32_t addr;
if (firstPercent)
return false;
if (!firstColon)
{
if (!ParseIPv4(str, &addr, &str))
return false;
str = SkipWhite(str);
if (*str != '\0')
return false;
init(Addr::IPv4);
getIPv4Storage()->sin_addr.s_addr = addr;
return true;
}
// Has dots and a colon, presumably its an IPv4 with port
if (!m_allowPort)
return false;
if (!ParseIPv4Port(str, &addr, &port))
return false;
init(Addr::IPv4);
getIPv4Storage()->sin_addr.s_addr = addr;
SetPort(port);
return true;
}
// Not IPv4
if (!firstColon || (firstPercent && (firstPercent < firstColon)))
return false;
else
{
// IPv6
sockaddr_in6 tmp = sockaddr_in6();
if (firstPercent || *str == '[')
{
char addrStr[INET6_ADDRSTRLEN];
const char *last, *lastBrace = NULL;
if (*str == '[')
{
++str;
last = lastBrace = strchr(str, ']');
if (!lastBrace)
return false;
}
if (firstPercent)
{
if (lastBrace && lastBrace < firstPercent + 2)
return false;
last = firstPercent;
}
if (last == str || size_t(last - str) >= sizeof(addrStr))
return false;
memcpy(addrStr, str, last - str);
addrStr[last - str] = '\0';
if (1 != inet_pton(AF_INET6, addrStr, &tmp.sin6_addr))
return false;
if (firstPercent)
{
// ONLY allow interface (scope) for link local addresses (for now)
// Otherwise address comparison breaks for regular addresses, one of which has a
// scope.
if (!IN6_IS_ADDR_LINKLOCAL(&tmp.sin6_addr))
return false;
if (lastBrace)
{
// already checked that (lastBrace-firstPercent >= 2)
memcpy(addrStr, firstPercent + 1, lastBrace - (firstPercent + 1));
addrStr[lastBrace - (firstPercent + 1)] = '\0';
last = addrStr;
}
else
last = firstPercent + 1;
unsigned int index = if_nametoindex(last);
if (index == 0 || index > UINT32_MAX)
return false;
tmp.sin6_scope_id = uint32_t(index);
}
if (lastBrace)
{
last = lastBrace + 1;
if (*last != ':')
{
last = SkipWhite(last);
if (*last != '\0')
return false;
}
else
{
// We have a port
uint64_t val;
if (!m_allowPort)
return false;
++last;
if (!StringToInt(last, val))
return false;
if (val > UINT16_MAX)
return false;
tmp.sin6_port = htons(uint16_t(val));
}
}
}
else
{
// no [] and no % so the string can be parsed directly
if (1 != inet_pton(AF_INET6, str, &tmp.sin6_addr))
return false;
}
// Set the actual value
init(Addr::IPv6);
sockaddr_in6 *storage = getIPv6Storage();
storage->sin6_addr = tmp.sin6_addr;
storage->sin6_port = tmp.sin6_port;
storage->sin6_scope_id = tmp.sin6_scope_id;
return true;
}
}
