diff options
author | Luigi Rizzo <rizzo@icir.org> | 2007-07-22 21:00:10 +0000 |
---|---|---|
committer | Luigi Rizzo <rizzo@icir.org> | 2007-07-22 21:00:10 +0000 |
commit | 930bf0402dfa5de2a81e9de3452b6994ec16eb09 (patch) | |
tree | 7959e2457e68cb72ad5589ec6f64980cf950b81a | |
parent | 97512a856f722a9b148b4c2b66bb91a6928d9a34 (diff) |
Make sip_destroy() return NULL so the caller can do things like
foo = sip_destroy(foo);
and reduce the chance of bugs due to dangling pointers.
Also remove a duplicate prototype for the function.
nothing to backport.
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@76392 65c4cc65-6c06-0410-ace0-fbb531ad65f3
-rw-r--r-- | channels/chan_sip.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/channels/chan_sip.c b/channels/chan_sip.c index fd9e3bae7..79ab9df18 100644 --- a/channels/chan_sip.c +++ b/channels/chan_sip.c @@ -1402,7 +1402,7 @@ static struct sip_pvt *sip_alloc(ast_string_field callid, struct sockaddr_in *si static int __sip_autodestruct(void *data); static void sip_scheddestroy(struct sip_pvt *p, int ms); static void sip_cancel_destroy(struct sip_pvt *p); -static void sip_destroy(struct sip_pvt *p); +static struct sip_pvt *sip_destroy(struct sip_pvt *p); static void __sip_destroy(struct sip_pvt *p, int lockowner, int lockdialoglist); static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod); static void __sip_pretend_ack(struct sip_pvt *p); @@ -1466,7 +1466,6 @@ static int reload_config(enum channelreloadreason reason); static int expire_register(void *data); static void *do_monitor(void *data); static int restart_monitor(void); -static void sip_destroy(struct sip_pvt *p); static int sip_addrcmp(char *name, struct sockaddr_in *sin); /* Support for peer matching */ static int sip_refer_allocate(struct sip_pvt *p); static void ast_quiet_chan(struct ast_channel *chan); @@ -2797,10 +2796,10 @@ static void sip_destroy_peer(struct sip_peer *peer) /* Delete it, it needs to disappear */ if (peer->call) - sip_destroy(peer->call); + peer->call = sip_destroy(peer->call); if (peer->mwipvt) /* We have an active subscription, delete it */ - sip_destroy(peer->mwipvt); + peer->mwipvt = sip_destroy(peer->mwipvt); if (peer->mwi_event_sub) { ast_event_unsubscribe(peer->mwi_event_sub); @@ -3370,7 +3369,7 @@ static void sip_registry_destroy(struct sip_registry *reg) we don't get reentered trying to grab the registry lock */ reg->call->registry = NULL; ast_debug(3, "Destroying active SIP dialog for registry %s@%s\n", reg->username, reg->hostname); - sip_destroy(reg->call); + reg->call = sip_destroy(reg->call); } if (reg->expire > -1) ast_sched_del(sched, reg->expire); @@ -3599,11 +3598,16 @@ static int update_call_counter(struct sip_pvt *fup, int event) return 0; } -/*! \brief Destroy SIP call structure */ -static void sip_destroy(struct sip_pvt *p) +/*! \brief Destroy SIP call structure. + * Make it return NULL so the caller can do things like + * foo = sip_destroy(foo); + * and reduce the chance of bugs due to dangling pointers. + */ +static struct sip_pvt * sip_destroy(struct sip_pvt *p) { ast_debug(3, "Destroying SIP dialog %s\n", p->callid); __sip_destroy(p, TRUE, TRUE); + return NULL; } /*! \brief Convert SIP hangup causes to Asterisk hangup causes */ @@ -16230,8 +16234,7 @@ static int sip_poke_noanswer(void *data) register_peer_exten(peer, FALSE); } if (peer->call) - sip_destroy(peer->call); - peer->call = NULL; + peer->call = sip_destroy(peer->call); peer->lastms = -1; ast_device_state_changed("SIP/%s", peer->name); /* Try again quickly */ @@ -16260,7 +16263,7 @@ static int sip_poke_peer(struct sip_peer *peer) if (peer->call) { if (sipdebug) ast_log(LOG_NOTICE, "Still have a QUALIFY dialog active, deleting\n"); - sip_destroy(peer->call); + peer->call = sip_destroy(peer->call); } if (!(p = peer->call = sip_alloc(NULL, NULL, 0, SIP_OPTIONS))) return -1; @@ -18338,7 +18341,7 @@ static int sip_do_reload(enum channelreloadreason reason) if (iterator->call) { ast_debug(3, "Destroying active SIP dialog for registry %s@%s\n", iterator->username, iterator->hostname); /* This will also remove references to the registry */ - sip_destroy(iterator->call); + iterator->call = sip_destroy(iterator->call); } ASTOBJ_UNLOCK(iterator); |