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bug 887753 - server not found after reconnecting to etherpad r=sworkman

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This commit is contained in:
Patrick McManus 2013-07-19 18:40:00 -04:00
parent d6f3091b8f
commit bcf5650b54
2 changed files with 40 additions and 20 deletions
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57
netwerk/dns/nsHostResolver.cpp
View File

@ -131,6 +131,26 @@ private:
//----------------------------------------------------------------------------
static inline bool
IsHighPriority(uint16_t flags)
{
return !(flags & (nsHostResolver::RES_PRIORITY_LOW | nsHostResolver::RES_PRIORITY_MEDIUM));
}
static inline bool
IsMediumPriority(uint16_t flags)
{
return flags & nsHostResolver::RES_PRIORITY_MEDIUM;
}
static inline bool
IsLowPriority(uint16_t flags)
{
return flags & nsHostResolver::RES_PRIORITY_LOW;
}
//----------------------------------------------------------------------------
// this macro filters out any flags that are not used when constructing the
// host key. the significant flags are those that would affect the resulting
// host record (i.e., the flags that are passed down to PR_GetAddrInfoByName).
@ -145,6 +165,7 @@ nsHostRecord::nsHostRecord(const nsHostKey *key)
, resolving(false)
, onQueue(false)
, usingAnyThread(false)
, mDoomed(false)
{
host = ((char *) this) + sizeof(nsHostRecord);
memcpy((char *) host, key->host, strlen(key->host) + 1);
@ -213,6 +234,9 @@ nsHostRecord::ReportUnusable(NetAddr *aAddress)
// must call locked
LOG(("Adding address to blacklist for host [%s], host record [%p].\n", host, this));
if (negative)
mDoomed = true;
char buf[kIPv6CStrBufSize];
if (NetAddrToString(aAddress, buf, sizeof(buf))) {
LOG(("Successfully adding address [%s] to blacklist for host [%s].\n", buf, host));
@ -228,6 +252,19 @@ nsHostRecord::ResetBlacklist()
mBlacklistedItems.Clear();
}
bool
nsHostRecord::HasUsableResult(uint16_t queryFlags) const
{
if (mDoomed)
return false;
// don't use cached negative results for high priority queries.
if (negative && IsHighPriority(queryFlags))
return false;
return addr_info || addr || negative;
}
//----------------------------------------------------------------------------
struct nsHostDBEnt : PLDHashEntryHdr
@ -463,24 +500,6 @@ nsHostResolver::Shutdown()
#endif
}
static inline bool
IsHighPriority(uint16_t flags)
{
return !(flags & (nsHostResolver::RES_PRIORITY_LOW | nsHostResolver::RES_PRIORITY_MEDIUM));
}
static inline bool
IsMediumPriority(uint16_t flags)
{
return flags & nsHostResolver::RES_PRIORITY_MEDIUM;
}
static inline bool
IsLowPriority(uint16_t flags)
{
return flags & nsHostResolver::RES_PRIORITY_LOW;
}
void
nsHostResolver::MoveQueue(nsHostRecord *aRec, PRCList &aDestQ)
{
@ -537,7 +556,7 @@ nsHostResolver::ResolveHost(const char *host,
rv = NS_ERROR_OUT_OF_MEMORY;
// do we have a cached result that we can reuse?
else if (!(flags & RES_BYPASS_CACHE) &&
he->rec->HasResult() &&
he->rec->HasUsableResult(flags) &&
TimeStamp::NowLoRes() <= (he->rec->expiration + TimeDuration::FromSeconds(mGracePeriod * 60))) {
LOG(("Using cached record for host [%s].\n", host));
// put reference to host record on stack...

3
netwerk/dns/nsHostResolver.h
View File

@ -80,7 +80,7 @@ public:
mozilla::TimeStamp expiration;
bool HasResult() const { return addr_info || addr || negative; }
bool HasUsableResult(uint16_t queryFlags) const;
// hold addr_info_lock when calling the blacklist functions
bool Blacklisted(mozilla::net::NetAddr *query);
@ -98,6 +98,7 @@ private:
bool onQueue; /* true if pending and on the queue (not yet given to getaddrinfo())*/
bool usingAnyThread; /* true if off queue and contributing to mActiveAnyThreadCount */
bool mDoomed; /* explicitly expired */
// a list of addresses associated with this record that have been reported
// as unusable. the list is kept as a set of strings to make it independent