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Merged revisions 303907 via svnmerge from

Browse Source 
https://origsvn.digium.com/svn/asterisk/branches/1.8

........
  r303907 | mnicholson | 2011-01-25 14:56:12 -0600 (Tue, 25 Jan 2011) | 2 lines
  
  Reimplemented fax session reservation to reverse the ABI breakage introduced in r297486.
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@304152 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Matthew Nicholson
2011-01-26 19:58:14 +00:00
parent 15605be78b
commit 26b7fb0213
2 changed files with 43 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
include/asterisk/res_fax.h
View File

@@ -58,10 +58,8 @@ enum ast_fax_modems {
/*! \brief current state of a fax session */
enum ast_fax_state {
/*! reserved state */
AST_FAX_STATE_RESERVED = 0,
/*! uninitialized state */
AST_FAX_STATE_UNINITIALIZED,
AST_FAX_STATE_UNINITIALIZED = 0,
/*! initialized state */
AST_FAX_STATE_INITIALIZED,
/*! fax resources open state */
@@ -70,6 +68,10 @@ enum ast_fax_state {
AST_FAX_STATE_ACTIVE,
/*! fax session complete */
AST_FAX_STATE_COMPLETE,
/*! reserved state */
AST_FAX_STATE_RESERVED,
/*! inactive state */
AST_FAX_STATE_INACTIVE,
};
/*! \brief fax session options */
@@ -186,8 +188,6 @@ struct ast_fax_session {
unsigned long frames_sent;
/*! the fax technology callbacks */
const struct ast_fax_tech *tech;
/*! the token used to reserve this session */
struct ast_fax_tech_token *token;
/*! private implementation pointer */
void *tech_pvt;
/*! fax state */
@@ -202,10 +202,6 @@ struct ast_fax_session {
struct ast_fax_debug_info *debug_info;
/*! used to take variable-sized frames in and output frames of an expected size to the fax stack */
struct ast_smoother *smoother;
/*! some flags to track the stat counters for this session */
unsigned int reserved:1;
unsigned int active:1;
};
/*! \brief used to register a FAX technology module with res_fax */
@@ -250,14 +246,6 @@ struct ast_fax_tech {
char * (* const cli_show_settings)(int);
};
/*! \brief used by res_fax to reserve a FAX session */
struct ast_fax_tech_token {
/*! the fax technology callbacks */
const struct ast_fax_tech *tech;
/*! private implementation pointer */
void *tech_pvt;
};
/*! \brief register a fax technology */
int ast_fax_tech_register(struct ast_fax_tech *tech);

63
res/res_fax.c
View File

@@ -593,6 +593,10 @@ const char *ast_fax_state_to_str(enum ast_fax_state state)
return "Active";
case AST_FAX_STATE_COMPLETE:
return "Complete";
case AST_FAX_STATE_RESERVED:
return "Reserved";
case AST_FAX_STATE_INACTIVE:
return "Inactive";
default:
ast_log(LOG_WARNING, "unhandled FAX state: %d\n", state);
return "Unknown";
@@ -633,16 +637,15 @@ static unsigned int fax_rate_str_to_int(const char *ratestr)
}
}
static void fax_session_release(struct ast_fax_session *s)
static void fax_session_release(struct ast_fax_session *s, struct ast_fax_tech_token *token)
{
if (s->token) {
s->tech->release_token(s->token);
s->token = NULL;
if (token) {
s->tech->release_token(token);
}
if (s->reserved) {
if (s->state == AST_FAX_STATE_RESERVED) {
ast_atomic_fetchadd_int(&faxregistry.reserved_sessions, -1);
s->reserved = 0;
s->state = AST_FAX_STATE_INACTIVE;
}
}
@@ -652,7 +655,7 @@ static void destroy_session(void *session)
struct ast_fax_session *s = session;
if (s->tech) {
fax_session_release(s);
fax_session_release(s, NULL);
if (s->tech_pvt) {
s->tech->destroy_session(s);
}
@@ -672,16 +675,15 @@ static void destroy_session(void *session)
ast_smoother_free(s->smoother);
}
if (s->active) {
if (s->state != AST_FAX_STATE_INACTIVE) {
ast_atomic_fetchadd_int(&faxregistry.active_sessions, -1);
s->active = 0;
}
ast_free(s->channame);
ast_free(s->chan_uniqueid);
}
static struct ast_fax_session *fax_session_reserve(struct ast_fax_session_details *details)
static struct ast_fax_session *fax_session_reserve(struct ast_fax_session_details *details, struct ast_fax_tech_token **token)
{
struct ast_fax_session *s;
struct fax_module *faxmod;
@@ -690,7 +692,7 @@ static struct ast_fax_session *fax_session_reserve(struct ast_fax_session_detail
return NULL;
}
s->state = AST_FAX_STATE_RESERVED;
s->state = AST_FAX_STATE_INACTIVE;
/* locate a FAX technology module that can handle said requirements
* Note: the requirements have not yet been finalized as T.38
@@ -718,19 +720,19 @@ static struct ast_fax_session *fax_session_reserve(struct ast_fax_session_detail
return s;
}
if (!(s->token = s->tech->reserve_session(s))) {
if (!(*token = s->tech->reserve_session(s))) {
ao2_ref(s, -1);
return NULL;
}
s->reserved = 1;
s->state = AST_FAX_STATE_RESERVED;
ast_atomic_fetchadd_int(&faxregistry.reserved_sessions, 1);
return s;
}
/*! \brief create a FAX session */
static struct ast_fax_session *fax_session_new(struct ast_fax_session_details *details, struct ast_channel *chan, struct ast_fax_session *reserved)
static struct ast_fax_session *fax_session_new(struct ast_fax_session_details *details, struct ast_channel *chan, struct ast_fax_session *reserved, struct ast_fax_tech_token *token)
{
struct ast_fax_session *s = NULL;
struct fax_module *faxmod;
@@ -739,9 +741,9 @@ static struct ast_fax_session *fax_session_new(struct ast_fax_session_details *d
s = reserved;
ao2_ref(reserved, +1);
if (s->reserved) {
if (s->state == AST_FAX_STATE_RESERVED) {
ast_atomic_fetchadd_int(&faxregistry.reserved_sessions, -1);
s->reserved = 0;
s->state = AST_FAX_STATE_UNINITIALIZED;
}
}
@@ -749,18 +751,19 @@ static struct ast_fax_session *fax_session_new(struct ast_fax_session_details *d
return NULL;
}
s->active = 1;
ast_atomic_fetchadd_int(&faxregistry.active_sessions, 1);
s->state = AST_FAX_STATE_UNINITIALIZED;
if (details->option.debug && (details->caps & AST_FAX_TECH_AUDIO)) {
if (!(s->debug_info = ast_calloc(1, sizeof(*(s->debug_info))))) {
fax_session_release(s, token);
ao2_ref(s, -1);
return NULL;
}
if (!(s->debug_info->dsp = ast_dsp_new())) {
ast_free(s->debug_info);
s->debug_info = NULL;
fax_session_release(s, token);
ao2_ref(s, -1);
return NULL;
}
@@ -768,11 +771,13 @@ static struct ast_fax_session *fax_session_new(struct ast_fax_session_details *d
}
if (!(s->channame = ast_strdup(chan->name))) {
fax_session_release(s, token);
ao2_ref(s, -1);
return NULL;
}
if (!(s->chan_uniqueid = ast_strdup(chan->uniqueid))) {
fax_session_release(s, token);
ao2_ref(s, -1);
return NULL;
}
@@ -783,7 +788,7 @@ static struct ast_fax_session *fax_session_new(struct ast_fax_session_details *d
details->id = s->id = ast_atomic_fetchadd_int(&faxregistry.nextsessionname, 1);
if (!s->tech) {
if (!token) {
/* locate a FAX technology module that can handle said requirements */
AST_RWLIST_RDLOCK(&faxmodules);
AST_RWLIST_TRAVERSE(&faxmodules, faxmod, list) {
@@ -804,7 +809,7 @@ static struct ast_fax_session *fax_session_new(struct ast_fax_session_details *d
}
}
if (!(s->tech_pvt = s->tech->new_session(s, s->token))) {
if (!(s->tech_pvt = s->tech->new_session(s, token))) {
ast_log(LOG_ERROR, "FAX session failed to initialize.\n");
ao2_ref(s, -1);
return NULL;
@@ -1069,7 +1074,7 @@ static struct ast_control_t38_parameters our_t38_parameters = {
};
/*! \brief this is the generic FAX session handling function */
static int generic_fax_exec(struct ast_channel *chan, struct ast_fax_session_details *details, struct ast_fax_session *reserved)
static int generic_fax_exec(struct ast_channel *chan, struct ast_fax_session_details *details, struct ast_fax_session *reserved, struct ast_fax_tech_token *token)
{
int ms;
int timeout = RES_FAX_TIMEOUT;
@@ -1087,7 +1092,7 @@ static int generic_fax_exec(struct ast_channel *chan, struct ast_fax_session_det
chancount = 1;
/* create the FAX session */
if (!(fax = fax_session_new(details, chan, reserved))) {
if (!(fax = fax_session_new(details, chan, reserved, token))) {
ast_log(LOG_ERROR, "Can't create a FAX session, FAX attempt failed.\n");
report_fax_status(chan, details, "No Available Resource");
return -1;
@@ -1485,6 +1490,7 @@ static int receivefax_exec(struct ast_channel *chan, const char *data)
int channel_alive;
struct ast_fax_session_details *details;
struct ast_fax_session *s;
struct ast_fax_tech_token *token = NULL;
struct ast_fax_document *doc;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(filename);
@@ -1617,7 +1623,7 @@ static int receivefax_exec(struct ast_channel *chan, const char *data)
details->option.allow_audio = AST_FAX_OPTFLAG_TRUE;
}
if (!(s = fax_session_reserve(details))) {
if (!(s = fax_session_reserve(details, &token))) {
ast_string_field_set(details, resultstr, "error reserving fax session");
set_channel_variables(chan, details);
ast_log(LOG_ERROR, "Unable to reserve FAX session.\n");
@@ -1631,6 +1637,7 @@ static int receivefax_exec(struct ast_channel *chan, const char *data)
ast_string_field_set(details, resultstr, "error answering channel");
set_channel_variables(chan, details);
ast_log(LOG_WARNING, "Channel '%s' failed answer attempt.\n", chan->name);
fax_session_release(s, token);
ao2_ref(s, -1);
ao2_ref(details, -1);
return -1;
@@ -1641,6 +1648,7 @@ static int receivefax_exec(struct ast_channel *chan, const char *data)
ast_string_field_set(details, error, "T38_NEG_ERROR");
ast_string_field_set(details, resultstr, "error negotiating T.38");
set_channel_variables(chan, details);
fax_session_release(s, token);
ao2_ref(s, -1);
ao2_ref(details, -1);
return -1;
@@ -1651,6 +1659,7 @@ static int receivefax_exec(struct ast_channel *chan, const char *data)
ast_string_field_set(details, error, "T38_NEG_ERROR");
ast_string_field_set(details, resultstr, "error negotiating T.38");
set_channel_variables(chan, details);
fax_session_release(s, token);
ao2_ref(s, -1);
ao2_ref(details, -1);
ast_log(LOG_ERROR, "error initializing channel '%s' in T.38 mode\n", chan->name);
@@ -1660,7 +1669,7 @@ static int receivefax_exec(struct ast_channel *chan, const char *data)
details->option.send_ced = 1;
}
if ((channel_alive = generic_fax_exec(chan, details, s)) < 0) {
if ((channel_alive = generic_fax_exec(chan, details, s, token)) < 0) {
ast_atomic_fetchadd_int(&faxregistry.fax_failures, 1);
}
@@ -1937,6 +1946,7 @@ static int sendfax_exec(struct ast_channel *chan, const char *data)
int channel_alive, file_count;
struct ast_fax_session_details *details;
struct ast_fax_session *s;
struct ast_fax_tech_token *token = NULL;
struct ast_fax_document *doc;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(filenames);
@@ -2092,7 +2102,7 @@ static int sendfax_exec(struct ast_channel *chan, const char *data)
details->option.request_t38 = AST_FAX_OPTFLAG_TRUE;
}
if (!(s = fax_session_reserve(details))) {
if (!(s = fax_session_reserve(details, &token))) {
ast_string_field_set(details, resultstr, "error reserving fax session");
set_channel_variables(chan, details);
ast_log(LOG_ERROR, "Unable to reserve FAX session.\n");
@@ -2106,6 +2116,7 @@ static int sendfax_exec(struct ast_channel *chan, const char *data)
ast_string_field_set(details, resultstr, "error answering channel");
set_channel_variables(chan, details);
ast_log(LOG_WARNING, "Channel '%s' failed answer attempt.\n", chan->name);
fax_session_release(s, token);
ao2_ref(s, -1);
ao2_ref(details, -1);
return -1;
@@ -2116,6 +2127,7 @@ static int sendfax_exec(struct ast_channel *chan, const char *data)
ast_string_field_set(details, error, "T38_NEG_ERROR");
ast_string_field_set(details, resultstr, "error negotiating T.38");
set_channel_variables(chan, details);
fax_session_release(s, token);
ao2_ref(s, -1);
ao2_ref(details, -1);
return -1;
@@ -2126,6 +2138,7 @@ static int sendfax_exec(struct ast_channel *chan, const char *data)
ast_string_field_set(details, error, "T38_NEG_ERROR");
ast_string_field_set(details, resultstr, "error negotiating T.38");
set_channel_variables(chan, details);
fax_session_release(s, token);
ao2_ref(s, -1);
ao2_ref(details, -1);
ast_log(LOG_ERROR, "error initializing channel '%s' in T.38 mode\n", chan->name);
@@ -2135,7 +2148,7 @@ static int sendfax_exec(struct ast_channel *chan, const char *data)
details->option.send_cng = 1;
}
if ((channel_alive = generic_fax_exec(chan, details, s)) < 0) {
if ((channel_alive = generic_fax_exec(chan, details, s, token)) < 0) {
ast_atomic_fetchadd_int(&faxregistry.fax_failures, 1);
}