char *get_fibstr(char **a, char **b, int *len_a, int *len_b, int n) {
int i;
char *foo;
for (i = 1; i < n; i++) {
foo = concat(*a, *b, *len_a, *len_b);
num_swap(len_b, len_a);
*len_b += *len_a;
str_swap(b, a);
str_swap(b, &foo);
free(foo);
}
return *a;
}
int dci_load(struct dci_state* state, struct dc_entry_t* entry)
{
if(entry->cached == 0)
{
struct str_t uri;
str_init_create(&uri, getfile_uri, 0);
const struct str_t const* uri_parts[] =
{
&slash,
&entry->_id,
};
str_concat(&uri, sizeof(uri_parts)/sizeof(const struct str_t const*), uri_parts);
{
struct request_t request;
ci_init(&request, &uri, 0, NULL, NULL, GET);
ci_request(&request);
str_swap(&request.response.body, &entry->cache);
ci_destroy(&request);
entry->cached = 1;
}
}
return 0;
}
static str *call_request_lookup_tcp(char **out, struct callmaster *m, enum call_opmode opmode) {
struct call *c;
struct call_monologue *monologue;
GQueue s = G_QUEUE_INIT;
str *ret = NULL, callid, fromtag, totag = STR_NULL;
GHashTable *infohash;
str_init(&callid, out[RE_TCP_RL_CALLID]);
infohash = g_hash_table_new_full(g_str_hash, g_str_equal, free, free);
c = call_get_opmode(&callid, m, opmode);
if (!c) {
ilog(LOG_WARNING, "["STR_FORMAT"] Got LOOKUP for unknown call-id", STR_FMT(&callid));
goto out;
}
info_parse(out[RE_TCP_RL_INFO], infohash, m);
streams_parse(out[RE_TCP_RL_STREAMS], m, &s);
str_init(&fromtag, g_hash_table_lookup(infohash, "fromtag"));
if (!fromtag.s) {
ilog(LOG_WARNING, "No from-tag in message");
goto out2;
}
str_init(&totag, g_hash_table_lookup(infohash, "totag"));
if (opmode == OP_ANSWER) {
if (!totag.s) {
ilog(LOG_WARNING, "No to-tag in message");
goto out2;
}
str_swap(&fromtag, &totag);
}
monologue = call_get_mono_dialogue(c, &fromtag, &totag, NULL);
if (!monologue) {
ilog(LOG_WARNING, "Invalid dialogue association");
goto out2;
}
if (monologue_offer_answer(monologue, &s, NULL))
goto out2;
ret = streams_print(&monologue->active_dialogue->medias, 1, s.length, NULL, SAF_TCP);
out2:
rwlock_unlock_w(&c->master_lock);
streams_free(&s);
if (m->conf.redis_write) {
redis_update(c, m->conf.redis_write, ANY_REDIS_ROLE);
} else if (m->conf.redis) {
redis_update(c, m->conf.redis, MASTER_REDIS_ROLE);
}
ilog(LOG_INFO, "Returning to SIP proxy: "STR_FORMAT"", STR_FMT0(ret));
obj_put(c);
out:
g_hash_table_destroy(infohash);
return ret;
}
void stringBubbleSort(int n, char **s) {
int comp;
for (int i = 0; i < n; i++) {
for (int j = 0; j < n - i - 1; j++) {
comp = my_strcmp(s[j], s[j + 1]);
if (comp > 0) {
str_swap(&s[j], &s[j + 1]);
}
}
}
}
int main()
{
char a[80], b[80]; /* ２つの文字配列 */
/* 文字列を入力 */
printf("a: ");
scanf("%s", a);
printf("b: ");
scanf("%s", b);
str_swap(a, b); /* 文字列をコピー */
printf("a: %s\n", a);
printf("b: %s\n", b); /* コピー後の結果を表示 */
return 0;
}
void
EngineBase::gen_sql_delete(String &sql, TypeCodes &type_codes_out,
const Table &table, const SqlGeneratorOptions &options)
{
if (!table.pk_fields().size())
throw BadSQLOperation(_T("cannot build update statement: no key in table"));
SqlGeneratorContext ctx;
String sql_query = _T("DELETE FROM ") + table.name();
TypeCodes type_codes;
Key sample_key;
table.mk_sample_key(type_codes, sample_key);
sql_query += _T(" WHERE ")
+ KeyFilter(sample_key).generate_sql(options, &ctx);
type_codes_out.swap(type_codes);
str_swap(sql, sql_query);
}
int main()
{
char str1[80], str2[80];
printf("Input a string1: ");
scanf("%s", str1);
printf("Input a string2: ");
scanf("%s", str2);
str_swap(str1, str2);
printf("string1: %s\n", str1);
printf("string2: %s\n", str2);
return 0;
}
void
EngineBase::gen_sql_update(String &sql, TypeCodes &type_codes_out,
ParamNums ¶m_nums_out, const Table &table,
const SqlGeneratorOptions &options)
{
if (!table.pk_fields().size())
throw BadSQLOperation(_T("cannot build update statement: no key in table"));
SqlGeneratorContext ctx;
String sql_query = _T("UPDATE ") + table.name() + _T(" SET ");
TypeCodes type_codes;
type_codes.reserve(table.size());
ParamNums param_nums;
size_t i;
for (i = 0; i < table.size(); ++i) {
const Column &col = table[i];
if (!col.is_pk() && !col.is_ro()) {
if (!type_codes.empty())
sql_query += _T(", ");
sql_query += col.name() + _T(" = ");
++ctx.counter_;
if (options.numbered_params_)
sql_query += _T(":") + to_string(ctx.counter_);
else
sql_query += _T("?");
param_nums[col.name()] = type_codes.size();
type_codes.push_back(col.type());
}
}
for (i = 0; i < table.pk_fields().size(); ++i) {
const String &col_name = table.pk_fields()[i];
param_nums[col_name] = type_codes.size();
type_codes.push_back(table[col_name].type());
}
type_codes_out.swap(type_codes);
param_nums_out.swap(param_nums);
Key sample_key;
table.mk_sample_key(type_codes, sample_key);
sql_query += _T(" WHERE ")
+ KeyFilter(sample_key).generate_sql(options, &ctx);
str_swap(sql, sql_query);
}
int main()
{
{
int a, b;
a = 100;
b = -200;
int_swap(&a, &b);
assert(a == -200 && b == 100);
}
{
char f[] = "VLSI CAD ";
char s[] = "Embedded Systems";
str_swap(f, s);
assert(strcmp(f, "Embedded Systems") == 0);
assert(strcmp(s, "VLSI CAD ") == 0);
}
return 0;
}
void bubble_str_list_sort(char **array, int length)
{
int swapped;
int i;
i = 1;
swapped = 1;
while (swapped)
{
swapped = 0;
i = 2;
while (i < length)
{
if (ft_strcmp(array[i - 1], array[i]) > 0)
{
str_swap(&array[i - 1], &array[i]);
swapped = 1;
}
i++;
}
length--;
}
}
void
EngineBase::gen_sql_insert(String &sql, TypeCodes &type_codes_out,
ParamNums ¶m_nums_out, const Table &table,
bool include_pk, bool numbered_params)
{
int count = 1, *pcount = NULL;
if (numbered_params)
pcount = &count;
String sql_query;
sql_query = _T("INSERT INTO ") + table.name() + _T(" (");
TypeCodes type_codes;
type_codes.reserve(table.size());
ParamNums param_nums;
Strings names, pholders;
size_t i;
for (i = 0; i < table.size(); ++i) {
const Column &col = table[i];
if ((!col.is_ro() || col.is_pk()) &&
(!col.is_pk() || include_pk))
{
if (pcount)
pholders.push_back(_T(":") + to_string(count));
else
pholders.push_back(_T("?"));
++count;
param_nums[col.name()] = type_codes.size();
type_codes.push_back(col.type());
names.push_back(col.name());
}
}
sql_query += ExpressionList(names).get_sql() + _T(") VALUES (") +
ExpressionList(pholders).get_sql() + _T(")");
str_swap(sql, sql_query);
type_codes_out.swap(type_codes);
param_nums_out.swap(param_nums);
}
int dci_write(const char *path, const char *buf, size_t size, const char *fileName, struct dci_state *state)
{
struct str_t header;
struct str_t fileName_param;
struct str_t fileSize_param;
struct str_t uploadDate_param;
struct str_t deviceID_param;
struct str_t isFolder_param;
struct str_t path_param;
struct str_t data_param;
struct str_t data;
str_init_create(&header, "Content-Type: application/json", 0);
str_init_create(&fileName_param, "fileName=", 0);
str_init_create(&fileSize_param, "fileSize=", 0);
str_init_create(&uploadDate_param, "uploadDate=", 0);
str_init_create(&deviceID_param, "deviceID", 0);
str_init_create(&isFolder_param, "isFolder=", 0);
str_init_create(&path_param, "path=", 0);
str_init_create(&data_param, "data=", 0);
struct dc_entry_t* entry;
entry = (struct dc_entry_t*) malloc(sizeof(struct dc_entry_t));
memset(entry, 0, sizeof(struct dc_entry_t));
str_init_create(&entry->fileName, fileName, 0);
entry->fileSize = size;
entry->uploadDate = time(0);
str_init_create(&entry->deviceID, "binensky", 0);
entry->isFolder = 0;
str_init_create(&entry->path, path, 0);
str_init_create(&entry->cache, buf, 0);
entry->cached = 1;
struct str_t uri;
struct str_t param_uri;
str_init_create(&uri, getfile_uri, 0);
str_init(¶m_uri);
const struct str_t const* uri_parts[] =
{
&fileName_param,
fileName,
&,
&fileSize_param,
itoa(entry->fileSize),
&,
&uploadDate_param,
itoa(entry->uploadDate),
&,
&deviceID_param,
&entry->deviceID,
&,
&isFolder_param,
itoa(entry->isFolder),
&,
&path_param,
&entry->path,
&,
&data_param,
&entry->cache
};
str_concat(¶m_uri, sizeof(uri_parts)/sizeof(const struct str_t const*), uri_parts);
{
struct request_t request;
ci_init(&request, &uri, 0, NULL, param_uri.str, POST);
ci_request(&request);
str_swap(&request.response.body, &entry->_id);
ci_destroy(&request);
struct dc_entry_t *tmp = dci_last_entry(state);
tmp = entry;
}
}
static const char *call_offer_answer_ng(bencode_item_t *input, struct callmaster *m,
bencode_item_t *output, enum call_opmode opmode, const char* addr,
const struct sockaddr_in6 *sin)
{
str sdp, fromtag, totag = STR_NULL, callid, viabranch;
char *errstr;
GQueue parsed = G_QUEUE_INIT;
GQueue streams = G_QUEUE_INIT;
struct call *call;
struct call_monologue *monologue;
int ret;
struct sdp_ng_flags flags;
struct sdp_chopper *chopper;
if (!bencode_dictionary_get_str(input, "sdp", &sdp))
return "No SDP body in message";
if (!bencode_dictionary_get_str(input, "call-id", &callid))
return "No call-id in message";
if (!bencode_dictionary_get_str(input, "from-tag", &fromtag))
return "No from-tag in message";
bencode_dictionary_get_str(input, "to-tag", &totag);
if (opmode == OP_ANSWER) {
if (!totag.s)
return "No to-tag in message";
str_swap(&totag, &fromtag);
}
bencode_dictionary_get_str(input, "via-branch", &viabranch);
if (sdp_parse(&sdp, &parsed))
return "Failed to parse SDP";
call_ng_process_flags(&flags, input);
flags.opmode = opmode;
errstr = "Incomplete SDP specification";
if (sdp_streams(&parsed, &streams, &flags))
goto out;
call = call_get_opmode(&callid, m, opmode);
errstr = "Unknown call-id";
if (!call)
goto out;
if (!call->created_from && addr) {
call->created_from = call_strdup(call, addr);
call->created_from_addr = *sin;
}
/* At least the random ICE strings are contained within the call struct, so we
* need to hold a ref until we're done sending the reply */
call_bencode_hold_ref(call, output);
monologue = call_get_mono_dialogue(call, &fromtag, &totag, viabranch.s ? &viabranch : NULL);
errstr = "Invalid dialogue association";
if (!monologue) {
rwlock_unlock_w(&call->master_lock);
obj_put(call);
goto out;
}
if (opmode == OP_OFFER) {
monologue->tagtype = FROM_TAG;
} else {
monologue->tagtype = TO_TAG;
}
chopper = sdp_chopper_new(&sdp);
bencode_buffer_destroy_add(output->buffer, (free_func_t) sdp_chopper_destroy, chopper);
ret = monologue_offer_answer(monologue, &streams, &flags);
if (!ret)
ret = sdp_replace(chopper, &parsed, monologue->active_dialogue, &flags);
rwlock_unlock_w(&call->master_lock);
if (m->conf.redis_write) {
redis_update(call, m->conf.redis_write, ANY_REDIS_ROLE);
} else if (m->conf.redis) {
redis_update(call, m->conf.redis, MASTER_REDIS_ROLE);
}
obj_put(call);
gettimeofday(&(monologue->started), NULL);
errstr = "Error rewriting SDP";
if (ret)
goto out;
bencode_dictionary_add_iovec(output, "sdp", &g_array_index(chopper->iov, struct iovec, 0),
chopper->iov_num, chopper->str_len);
bencode_dictionary_add_string(output, "result", "ok");
errstr = NULL;
out:
sdp_free(&parsed);
streams_free(&streams);
return errstr;
}
/* Update single local media description to after receiving answer
* from remote.
*/
static pj_status_t process_m_answer( pj_pool_t *pool,
pjmedia_sdp_media *offer,
pjmedia_sdp_media *answer,
pj_bool_t allow_asym)
{
unsigned i;
/* Check that the media type match our offer. */
if (pj_strcmp(&answer->desc.media, &offer->desc.media)!=0) {
/* The media type in the answer is different than the offer! */
return PJMEDIA_SDPNEG_EINVANSMEDIA;
}
/* Check that transport in the answer match our offer. */
/* At this point, transport type must be compatible,
* the transport instance will do more validation later.
*/
if (pjmedia_sdp_transport_cmp(&answer->desc.transport,
&offer->desc.transport)
!= PJ_SUCCESS)
{
return PJMEDIA_SDPNEG_EINVANSTP;
}
/* Check if remote has rejected our offer */
if (answer->desc.port == 0) {
/* Remote has rejected our offer.
* Deactivate our media too.
*/
pjmedia_sdp_media_deactivate(pool, offer);
/* Don't need to proceed */
return PJ_SUCCESS;
}
/* Ticket #1148: check if remote answer does not set port to zero when
* offered with port zero. Let's just tolerate it.
*/
if (offer->desc.port == 0) {
/* Don't need to proceed */
return PJ_SUCCESS;
}
/* Process direction attributes */
update_media_direction(pool, answer, offer);
/* If asymetric media is allowed, then just check that remote answer has
* codecs that are within the offer.
*
* Otherwise if asymetric media is not allowed, then we will choose only
* one codec in our initial offer to match the answer.
*/
if (allow_asym) {
for (i=0; i<answer->desc.fmt_count; ++i) {
unsigned j;
pj_str_t *rem_fmt = &answer->desc.fmt[i];
for (j=0; j<offer->desc.fmt_count; ++j) {
if (pj_strcmp(rem_fmt, &answer->desc.fmt[j])==0)
break;
}
if (j != offer->desc.fmt_count) {
/* Found at least one common codec. */
break;
}
}
if (i == answer->desc.fmt_count) {
/* No common codec in the answer! */
return PJMEDIA_SDPNEG_EANSNOMEDIA;
}
PJ_TODO(CHECK_SDP_NEGOTIATION_WHEN_ASYMETRIC_MEDIA_IS_ALLOWED);
} else {
/* Offer format priority based on answer format index/priority */
unsigned offer_fmt_prior[PJMEDIA_MAX_SDP_FMT];
/* Remove all format in the offer that has no matching answer */
for (i=0; i<offer->desc.fmt_count;) {
unsigned pt;
pj_uint32_t j;
pj_str_t *fmt = &offer->desc.fmt[i];
/* Find matching answer */
pt = pj_strtoul(fmt);
if (pt < 96) {
for (j=0; j<answer->desc.fmt_count; ++j) {
if (pj_strcmp(fmt, &answer->desc.fmt[j])==0)
break;
}
} else {
/* This is dynamic payload type.
* For dynamic payload type, we must look the rtpmap and
* compare the encoding name.
*/
const pjmedia_sdp_attr *a;
pjmedia_sdp_rtpmap or_;
/* Get the rtpmap for the payload type in the offer. */
a = pjmedia_sdp_media_find_attr2(offer, "rtpmap", fmt);
if (!a) {
pj_assert(!"Bug! Offer should have been validated");
return PJ_EBUG;
}
pjmedia_sdp_attr_get_rtpmap(a, &or_);
/* Find paylaod in answer SDP with matching
* encoding name and clock rate.
*/
for (j=0; j<answer->desc.fmt_count; ++j) {
a = pjmedia_sdp_media_find_attr2(answer, "rtpmap",
&answer->desc.fmt[j]);
if (a) {
pjmedia_sdp_rtpmap ar;
pjmedia_sdp_attr_get_rtpmap(a, &ar);
/* See if encoding name, clock rate, and channel
* count match
*/
if (!pj_stricmp(&or_.enc_name, &ar.enc_name) &&
or_.clock_rate == ar.clock_rate &&
(pj_stricmp(&or_.param, &ar.param)==0 ||
(ar.param.slen==1 && *ar.param.ptr=='1')))
{
/* Call custom format matching callbacks */
if (custom_fmt_match(pool, &or_.enc_name,
offer, i, answer, j, 0) ==
PJ_SUCCESS)
{
/* Match! */
break;
}
}
}
}
}
if (j == answer->desc.fmt_count) {
/* This format has no matching answer.
* Remove it from our offer.
*/
pjmedia_sdp_attr *a;
/* Remove rtpmap associated with this format */
a = pjmedia_sdp_media_find_attr2(offer, "rtpmap", fmt);
if (a)
pjmedia_sdp_media_remove_attr(offer, a);
/* Remove fmtp associated with this format */
a = pjmedia_sdp_media_find_attr2(offer, "fmtp", fmt);
if (a)
pjmedia_sdp_media_remove_attr(offer, a);
/* Remove this format from offer's array */
pj_array_erase(offer->desc.fmt, sizeof(offer->desc.fmt[0]),
offer->desc.fmt_count, i);
--offer->desc.fmt_count;
} else {
offer_fmt_prior[i] = j;
++i;
}
}
if (0 == offer->desc.fmt_count) {
/* No common codec in the answer! */
return PJMEDIA_SDPNEG_EANSNOMEDIA;
}
/* Post process:
* - Resort offer formats so the order match to the answer.
* - Remove answer formats that unmatches to the offer.
*/
/* Resort offer formats */
for (i=0; i<offer->desc.fmt_count; ++i) {
unsigned j;
for (j=i+1; j<offer->desc.fmt_count; ++j) {
if (offer_fmt_prior[i] > offer_fmt_prior[j]) {
unsigned tmp = offer_fmt_prior[i];
offer_fmt_prior[i] = offer_fmt_prior[j];
offer_fmt_prior[j] = tmp;
str_swap(&offer->desc.fmt[i], &offer->desc.fmt[j]);
}
}
}
/* Remove unmatched answer formats */
{
unsigned del_cnt = 0;
for (i=0; i<answer->desc.fmt_count;) {
/* The offer is ordered now, also the offer_fmt_prior */
if (i >= offer->desc.fmt_count ||
offer_fmt_prior[i]-del_cnt != i)
{
pj_str_t *fmt = &answer->desc.fmt[i];
pjmedia_sdp_attr *a;
/* Remove rtpmap associated with this format */
a = pjmedia_sdp_media_find_attr2(answer, "rtpmap", fmt);
if (a)
pjmedia_sdp_media_remove_attr(answer, a);
/* Remove fmtp associated with this format */
a = pjmedia_sdp_media_find_attr2(answer, "fmtp", fmt);
if (a)
pjmedia_sdp_media_remove_attr(answer, a);
/* Remove this format from answer's array */
pj_array_erase(answer->desc.fmt,
sizeof(answer->desc.fmt[0]),
answer->desc.fmt_count, i);
--answer->desc.fmt_count;
++del_cnt;
} else {
++i;
}
}
}
}
/* Looks okay */
return PJ_SUCCESS;
}
/* Try to match offer with answer. */
static pj_status_t match_offer(pj_pool_t *pool,
pj_bool_t prefer_remote_codec_order,
pj_bool_t answer_with_multiple_codecs,
const pjmedia_sdp_media *offer,
const pjmedia_sdp_media *preanswer,
const pjmedia_sdp_session *preanswer_sdp,
pjmedia_sdp_media **p_answer)
{
unsigned i;
pj_bool_t master_has_codec = 0,
master_has_other = 0,
found_matching_codec = 0,
found_matching_telephone_event = 0,
found_matching_other = 0;
unsigned pt_answer_count = 0;
pj_str_t pt_answer[PJMEDIA_MAX_SDP_FMT];
pj_str_t pt_offer[PJMEDIA_MAX_SDP_FMT];
pjmedia_sdp_media *answer;
const pjmedia_sdp_media *master, *slave;
/* If offer has zero port, just clone the offer */
if (offer->desc.port == 0) {
answer = sdp_media_clone_deactivate(pool, offer, preanswer,
preanswer_sdp);
*p_answer = answer;
return PJ_SUCCESS;
}
/* If the preanswer define zero port, this media is being rejected,
* just clone the preanswer.
*/
if (preanswer->desc.port == 0) {
answer = pjmedia_sdp_media_clone(pool, preanswer);
*p_answer = answer;
return PJ_SUCCESS;
}
/* Set master/slave negotiator based on prefer_remote_codec_order. */
if (prefer_remote_codec_order) {
master = offer;
slave = preanswer;
} else {
master = preanswer;
slave = offer;
}
/* With the addition of telephone-event and dodgy MS RTC SDP,
* the answer generation algorithm looks really shitty...
*/
for (i=0; i<master->desc.fmt_count; ++i) {
unsigned j;
if (pj_isdigit(*master->desc.fmt[i].ptr)) {
/* This is normal/standard payload type, where it's identified
* by payload number.
*/
unsigned pt;
pt = pj_strtoul(&master->desc.fmt[i]);
if (pt < 96) {
/* For static payload type, it's enough to compare just
* the payload number.
*/
master_has_codec = 1;
/* We just need to select one codec if not allowing multiple.
* Continue if we have selected matching codec for previous
* payload.
*/
if (!answer_with_multiple_codecs && found_matching_codec)
continue;
/* Find matching codec in local descriptor. */
for (j=0; j<slave->desc.fmt_count; ++j) {
unsigned p;
p = pj_strtoul(&slave->desc.fmt[j]);
if (p == pt && pj_isdigit(*slave->desc.fmt[j].ptr)) {
found_matching_codec = 1;
pt_offer[pt_answer_count] = slave->desc.fmt[j];
pt_answer[pt_answer_count++] = slave->desc.fmt[j];
break;
}
}
} else {
/* This is dynamic payload type.
* For dynamic payload type, we must look the rtpmap and
* compare the encoding name.
*/
const pjmedia_sdp_attr *a;
pjmedia_sdp_rtpmap or_;
pj_bool_t is_codec;
/* Get the rtpmap for the payload type in the master. */
a = pjmedia_sdp_media_find_attr2(master, "rtpmap",
&master->desc.fmt[i]);
if (!a) {
pj_assert(!"Bug! Offer should have been validated");
return PJMEDIA_SDP_EMISSINGRTPMAP;
}
pjmedia_sdp_attr_get_rtpmap(a, &or_);
if (!pj_stricmp2(&or_.enc_name, "telephone-event")) {
if (found_matching_telephone_event)
continue;
is_codec = 0;
} else {
master_has_codec = 1;
if (!answer_with_multiple_codecs && found_matching_codec)
continue;
is_codec = 1;
}
/* Find paylaod in our initial SDP with matching
* encoding name and clock rate.
*/
for (j=0; j<slave->desc.fmt_count; ++j) {
a = pjmedia_sdp_media_find_attr2(slave, "rtpmap",
&slave->desc.fmt[j]);
if (a) {
pjmedia_sdp_rtpmap lr;
pjmedia_sdp_attr_get_rtpmap(a, &lr);
/* See if encoding name, clock rate, and
* channel count match
*/
if (!pj_stricmp(&or_.enc_name, &lr.enc_name) &&
or_.clock_rate == lr.clock_rate &&
(pj_stricmp(&or_.param, &lr.param)==0 ||
(lr.param.slen==0 && or_.param.slen==1 &&
*or_.param.ptr=='1') ||
(or_.param.slen==0 && lr.param.slen==1 &&
*lr.param.ptr=='1')))
{
/* Match! */
if (is_codec) {
pjmedia_sdp_media *o_med, *a_med;
unsigned o_fmt_idx, a_fmt_idx;
o_med = (pjmedia_sdp_media*)offer;
a_med = (pjmedia_sdp_media*)preanswer;
o_fmt_idx = prefer_remote_codec_order? i:j;
a_fmt_idx = prefer_remote_codec_order? j:i;
/* Call custom format matching callbacks */
if (custom_fmt_match(pool, &or_.enc_name,
o_med, o_fmt_idx,
a_med, a_fmt_idx,
ALLOW_MODIFY_ANSWER) !=
PJ_SUCCESS)
{
continue;
}
found_matching_codec = 1;
} else {
found_matching_telephone_event = 1;
}
pt_offer[pt_answer_count] =
prefer_remote_codec_order?
offer->desc.fmt[i]:
offer->desc.fmt[j];
pt_answer[pt_answer_count++] =
prefer_remote_codec_order?
preanswer->desc.fmt[j]:
preanswer->desc.fmt[i];
break;
}
}
}
}
} else {
/* This is a non-standard, brain damaged SDP where the payload
* type is non-numeric. It exists e.g. in Microsoft RTC based
* UA, to indicate instant messaging capability.
* Example:
* - m=x-ms-message 5060 sip null
*/
master_has_other = 1;
if (found_matching_other)
continue;
for (j=0; j<slave->desc.fmt_count; ++j) {
if (!pj_strcmp(&master->desc.fmt[i], &slave->desc.fmt[j])) {
/* Match */
found_matching_other = 1;
pt_offer[pt_answer_count] = prefer_remote_codec_order?
offer->desc.fmt[i]:
offer->desc.fmt[j];
pt_answer[pt_answer_count++] = prefer_remote_codec_order?
preanswer->desc.fmt[j]:
preanswer->desc.fmt[i];
break;
}
}
}
}
/* See if all types of master can be matched. */
if (master_has_codec && !found_matching_codec) {
return PJMEDIA_SDPNEG_NOANSCODEC;
}
/* If this comment is removed, negotiation will fail if remote has offered
telephone-event and local is not configured with telephone-event
if (offer_has_telephone_event && !found_matching_telephone_event) {
return PJMEDIA_SDPNEG_NOANSTELEVENT;
}
*/
if (master_has_other && !found_matching_other) {
return PJMEDIA_SDPNEG_NOANSUNKNOWN;
}
/* Seems like everything is in order.
* Build the answer by cloning from preanswer, but rearrange the payload
* to suit the offer.
*/
answer = pjmedia_sdp_media_clone(pool, preanswer);
for (i=0; i<pt_answer_count; ++i) {
unsigned j;
for (j=i; j<answer->desc.fmt_count; ++j) {
if (!pj_strcmp(&answer->desc.fmt[j], &pt_answer[i]))
break;
}
pj_assert(j != answer->desc.fmt_count);
str_swap(&answer->desc.fmt[i], &answer->desc.fmt[j]);
}
/* Remove unwanted local formats. */
for (i=pt_answer_count; i<answer->desc.fmt_count; ++i) {
pjmedia_sdp_attr *a;
/* Remove rtpmap for this format */
a = pjmedia_sdp_media_find_attr2(answer, "rtpmap",
&answer->desc.fmt[i]);
if (a) {
pjmedia_sdp_media_remove_attr(answer, a);
}
/* Remove fmtp for this format */
a = pjmedia_sdp_media_find_attr2(answer, "fmtp",
&answer->desc.fmt[i]);
if (a) {
pjmedia_sdp_media_remove_attr(answer, a);
}
}
answer->desc.fmt_count = pt_answer_count;
#if PJMEDIA_SDP_NEG_ANSWER_SYMMETRIC_PT
apply_answer_symmetric_pt(pool, answer, pt_answer_count,
pt_offer, pt_answer);
#endif
/* Update media direction. */
update_media_direction(pool, offer, answer);
*p_answer = answer;
return PJ_SUCCESS;
}
static str *call_update_lookup_udp(char **out, struct callmaster *m, enum call_opmode opmode, const char* addr,
const struct sockaddr_in6 *sin)
{
struct call *c;
struct call_monologue *monologue;
GQueue q = G_QUEUE_INIT;
struct stream_params sp;
str *ret, callid, viabranch, fromtag, totag = STR_NULL;
int i;
str_init(&callid, out[RE_UDP_UL_CALLID]);
str_init(&viabranch, out[RE_UDP_UL_VIABRANCH]);
str_init(&fromtag, out[RE_UDP_UL_FROMTAG]);
str_init(&totag, out[RE_UDP_UL_TOTAG]);
if (opmode == OP_ANSWER)
str_swap(&fromtag, &totag);
c = call_get_opmode(&callid, m, opmode);
if (!c) {
ilog(LOG_WARNING, "["STR_FORMAT"] Got UDP LOOKUP for unknown call-id",
STR_FMT(&callid));
return str_sprintf("%s 0 0.0.0.0\n", out[RE_UDP_COOKIE]);
}
if (!c->created_from && addr) {
c->created_from = call_strdup(c, addr);
c->created_from_addr = *sin;
}
monologue = call_get_mono_dialogue(c, &fromtag, &totag, NULL);
if (!monologue)
goto ml_fail;
if (opmode == OP_OFFER) {
monologue->tagtype = FROM_TAG;
} else {
monologue->tagtype = TO_TAG;
}
if (addr_parse_udp(&sp, out))
goto addr_fail;
g_queue_push_tail(&q, &sp);
i = monologue_offer_answer(monologue, &q, NULL);
g_queue_clear(&q);
if (i)
goto unlock_fail;
ret = streams_print(&monologue->active_dialogue->medias,
sp.index, sp.index, out[RE_UDP_COOKIE], SAF_UDP);
rwlock_unlock_w(&c->master_lock);
if (m->conf.redis_write) {
redis_update(c, m->conf.redis_write, ANY_REDIS_ROLE);
} else if (m->conf.redis) {
redis_update(c, m->conf.redis, MASTER_REDIS_ROLE);
}
gettimeofday(&(monologue->started), NULL);
ilog(LOG_INFO, "Returning to SIP proxy: "STR_FORMAT"", STR_FMT(ret));
goto out;
ml_fail:
ilog(LOG_ERR, "Invalid dialogue association");
goto unlock_fail;
addr_fail:
ilog(LOG_ERR, "Failed to parse a media stream: %s/%s:%s",
out[RE_UDP_UL_ADDR4], out[RE_UDP_UL_ADDR6], out[RE_UDP_UL_PORT]);
goto unlock_fail;
unlock_fail:
rwlock_unlock_w(&c->master_lock);
ret = str_sprintf("%s E8\n", out[RE_UDP_COOKIE]);
out:
obj_put(c);
return ret;
}
/* Update single local media description to after receiving answer
* from remote.
*/
static pj_status_t process_m_answer( pj_pool_t *pool,
pjmedia_sdp_media *offer,
pjmedia_sdp_media *answer,
pj_bool_t allow_asym)
{
unsigned i;
/* Check that the media type match our offer. */
if (pj_strcmp(&answer->desc.media, &offer->desc.media)!=0) {
/* The media type in the answer is different than the offer! */
return PJMEDIA_SDPNEG_EINVANSMEDIA;
}
/* Check that transport in the answer match our offer. */
/* At this point, transport type must be compatible,
* the transport instance will do more validation later.
*/
if (pjmedia_sdp_transport_cmp(&answer->desc.transport,
&offer->desc.transport)
!= PJ_SUCCESS)
{
return PJMEDIA_SDPNEG_EINVANSTP;
}
/* Check if remote has rejected our offer */
if (answer->desc.port == 0) {
/* Remote has rejected our offer.
* Set our port to zero too in active SDP.
*/
offer->desc.port = 0;
}
/* Process direction attributes */
update_media_direction(pool, answer, offer);
/* If asymetric media is allowed, then just check that remote answer has
* codecs that are within the offer.
*
* Otherwise if asymetric media is not allowed, then we will choose only
* one codec in our initial offer to match the answer.
*/
if (allow_asym) {
for (i=0; i<answer->desc.fmt_count; ++i) {
unsigned j;
pj_str_t *rem_fmt = &answer->desc.fmt[i];
for (j=0; j<offer->desc.fmt_count; ++j) {
if (pj_strcmp(rem_fmt, &answer->desc.fmt[j])==0)
break;
}
if (j != offer->desc.fmt_count) {
/* Found at least one common codec. */
break;
}
}
if (i == answer->desc.fmt_count) {
/* No common codec in the answer! */
return PJMEDIA_SDPNEG_EANSNOMEDIA;
}
PJ_TODO(CHECK_SDP_NEGOTIATION_WHEN_ASYMETRIC_MEDIA_IS_ALLOWED);
} else {
/* Remove all format in the offer that has no matching answer */
for (i=0; i<offer->desc.fmt_count;) {
unsigned pt;
pj_uint32_t j;
pj_str_t *fmt = &offer->desc.fmt[i];
/* Find matching answer */
pt = pj_strtoul(fmt);
if (pt < 96) {
for (j=0; j<answer->desc.fmt_count; ++j) {
if (pj_strcmp(fmt, &answer->desc.fmt[j])==0)
break;
}
} else {
/* This is dynamic payload type.
* For dynamic payload type, we must look the rtpmap and
* compare the encoding name.
*/
const pjmedia_sdp_attr *a;
pjmedia_sdp_rtpmap or_;
/* Get the rtpmap for the payload type in the offer. */
a = pjmedia_sdp_media_find_attr2(offer, "rtpmap", fmt);
if (!a) {
pj_assert(!"Bug! Offer should have been validated");
return PJ_EBUG;
}
pjmedia_sdp_attr_get_rtpmap(a, &or_);
/* Find paylaod in answer SDP with matching
* encoding name and clock rate.
*/
for (j=0; j<answer->desc.fmt_count; ++j) {
a = pjmedia_sdp_media_find_attr2(answer, "rtpmap",
&answer->desc.fmt[j]);
if (a) {
pjmedia_sdp_rtpmap ar;
pjmedia_sdp_attr_get_rtpmap(a, &ar);
/* See if encoding name, clock rate, and channel
* count match
*/
if (!pj_stricmp(&or_.enc_name, &ar.enc_name) &&
or_.clock_rate == ar.clock_rate &&
(pj_stricmp(&or_.param, &ar.param)==0 ||
(ar.param.slen==1 && *ar.param.ptr=='1')))
{
/* Further check for G7221, negotiate bitrate. */
if (pj_strcmp2(&or_.enc_name, "G7221") == 0) {
if (match_g7221(offer, i, answer, j))
break;
} else {
/* Match! */
break;
}
}
}
}
}
if (j == answer->desc.fmt_count) {
/* This format has no matching answer.
* Remove it from our offer.
*/
pjmedia_sdp_attr *a;
/* Remove rtpmap associated with this format */
a = pjmedia_sdp_media_find_attr2(offer, "rtpmap", fmt);
if (a)
pjmedia_sdp_media_remove_attr(offer, a);
/* Remove fmtp associated with this format */
a = pjmedia_sdp_media_find_attr2(offer, "fmtp", fmt);
if (a)
pjmedia_sdp_media_remove_attr(offer, a);
/* Remove this format from offer's array */
pj_array_erase(offer->desc.fmt, sizeof(offer->desc.fmt[0]),
offer->desc.fmt_count, i);
--offer->desc.fmt_count;
} else {
++i;
}
}
/* Arrange format in the offer so the order match the priority
* in the answer
*/
for (i=0; i<answer->desc.fmt_count; ++i) {
unsigned j;
pj_str_t *fmt = &answer->desc.fmt[i];
for (j=i; j<offer->desc.fmt_count; ++j) {
if (pj_strcmp(fmt, &offer->desc.fmt[j])==0) {
str_swap(&offer->desc.fmt[i], &offer->desc.fmt[j]);
break;
}
}
}
}
/* Looks okay */
return PJ_SUCCESS;
}
/* Try to match offer with answer. */
static pj_status_t match_offer(pj_pool_t *pool,
const pjmedia_sdp_media *offer,
const pjmedia_sdp_media *preanswer,
const pjmedia_sdp_media *orig_local,
pjmedia_sdp_media **p_answer)
{
unsigned i;
pj_bool_t offer_has_codec = 0,
offer_has_telephone_event = 0,
offer_has_other = 0,
found_matching_codec = 0,
found_matching_telephone_event = 0,
found_matching_other = 0;
unsigned pt_answer_count = 0;
pj_str_t pt_answer[PJMEDIA_MAX_SDP_FMT];
pjmedia_sdp_media *answer;
/* With the addition of telephone-event and dodgy MS RTC SDP,
* the answer generation algorithm looks really shitty...
*/
for (i=0; i<offer->desc.fmt_count; ++i) {
unsigned j;
if (pj_isdigit(*offer->desc.fmt[i].ptr)) {
/* This is normal/standard payload type, where it's identified
* by payload number.
*/
unsigned pt;
pt = pj_strtoul(&offer->desc.fmt[i]);
if (pt < 96) {
/* For static payload type, it's enough to compare just
* the payload number.
*/
offer_has_codec = 1;
/* We just need to select one codec.
* Continue if we have selected matching codec for previous
* payload.
*/
if (found_matching_codec)
continue;
/* Find matching codec in local descriptor. */
for (j=0; j<preanswer->desc.fmt_count; ++j) {
unsigned p;
p = pj_strtoul(&preanswer->desc.fmt[j]);
if (p == pt && pj_isdigit(*preanswer->desc.fmt[j].ptr)) {
found_matching_codec = 1;
pt_answer[pt_answer_count++] = preanswer->desc.fmt[j];
break;
}
}
} else {
/* This is dynamic payload type.
* For dynamic payload type, we must look the rtpmap and
* compare the encoding name.
*/
const pjmedia_sdp_attr *a;
pjmedia_sdp_rtpmap or_;
pj_bool_t is_codec;
/* Get the rtpmap for the payload type in the offer. */
a = pjmedia_sdp_media_find_attr2(offer, "rtpmap",
&offer->desc.fmt[i]);
if (!a) {
pj_assert(!"Bug! Offer should have been validated");
return PJMEDIA_SDP_EMISSINGRTPMAP;
}
pjmedia_sdp_attr_get_rtpmap(a, &or_);
if (!pj_strcmp2(&or_.enc_name, "telephone-event")) {
offer_has_telephone_event = 1;
if (found_matching_telephone_event)
continue;
is_codec = 0;
} else {
offer_has_codec = 1;
if (found_matching_codec)
continue;
is_codec = 1;
}
/* Find paylaod in our initial SDP with matching
* encoding name and clock rate.
*/
for (j=0; j<preanswer->desc.fmt_count; ++j) {
a = pjmedia_sdp_media_find_attr2(preanswer, "rtpmap",
&preanswer->desc.fmt[j]);
if (a) {
pjmedia_sdp_rtpmap lr;
pjmedia_sdp_attr_get_rtpmap(a, &lr);
/* See if encoding name, clock rate, and
* channel count match
*/
if (!pj_stricmp(&or_.enc_name, &lr.enc_name) &&
or_.clock_rate == lr.clock_rate &&
(pj_strcmp(&or_.param, &lr.param)==0 ||
(or_.param.slen==1 && *or_.param.ptr=='1')))
{
/* Match! */
if (is_codec) {
/* Further check for G7221, negotiate bitrate. */
if (pj_strcmp2(&or_.enc_name, "G7221") == 0 &&
match_g7221(offer, i, preanswer, j) == 0)
{
continue;
}
found_matching_codec = 1;
} else {
found_matching_telephone_event = 1;
}
pt_answer[pt_answer_count++] = preanswer->desc.fmt[j];
break;
}
}
}
}
} else {
/* This is a non-standard, brain damaged SDP where the payload
* type is non-numeric. It exists e.g. in Microsoft RTC based
* UA, to indicate instant messaging capability.
* Example:
* - m=x-ms-message 5060 sip null
*/
offer_has_other = 1;
if (found_matching_other)
continue;
for (j=0; j<preanswer->desc.fmt_count; ++j) {
if (!pj_strcmp(&offer->desc.fmt[i], &preanswer->desc.fmt[j])) {
/* Match */
found_matching_other = 1;
pt_answer[pt_answer_count++] = preanswer->desc.fmt[j];
break;
}
}
}
}
/* See if all types of offer can be matched. */
if (offer_has_codec && !found_matching_codec) {
return PJMEDIA_SDPNEG_NOANSCODEC;
}
/* If this comment is removed, negotiation will fail if remote has offered
telephone-event and local is not configured with telephone-event
if (offer_has_telephone_event && !found_matching_telephone_event) {
return PJMEDIA_SDPNEG_NOANSTELEVENT;
}
*/
if (offer_has_other && !found_matching_other) {
return PJMEDIA_SDPNEG_NOANSUNKNOWN;
}
/* Seems like everything is in order.
* Build the answer by cloning from local media, but rearrange the payload
* to suit the offer.
*/
answer = pjmedia_sdp_media_clone(pool, orig_local);
for (i=0; i<pt_answer_count; ++i) {
unsigned j;
for (j=i; j<answer->desc.fmt_count; ++j) {
if (!pj_strcmp(&answer->desc.fmt[j], &pt_answer[i]))
break;
}
pj_assert(j != answer->desc.fmt_count);
str_swap(&answer->desc.fmt[i], &answer->desc.fmt[j]);
}
/* Remove unwanted local formats. */
for (i=pt_answer_count; i<answer->desc.fmt_count; ++i) {
pjmedia_sdp_attr *a;
/* Remove rtpmap for this format */
a = pjmedia_sdp_media_find_attr2(answer, "rtpmap",
&answer->desc.fmt[i]);
if (a) {
pjmedia_sdp_media_remove_attr(answer, a);
}
/* Remove fmtp for this format */
a = pjmedia_sdp_media_find_attr2(answer, "fmtp",
&answer->desc.fmt[i]);
if (a) {
pjmedia_sdp_media_remove_attr(answer, a);
}
}
answer->desc.fmt_count = pt_answer_count;
/* If offer has zero port, set our answer with zero port too */
if (offer->desc.port==0)
answer->desc.port = 0;
/* Update media direction. */
update_media_direction(pool, offer, answer);
*p_answer = answer;
return PJ_SUCCESS;
}
int main(int argc, char const *argv[]) {
/* str_new */
str_t string = str_new();
/* str_set */
str_set(string, " %d%d%d", 1, 2, 3);
/* str_append */
str_append(string, "appending end");
/* str_println */
str_println(string);
/* str_reverse */
str_reverse(string);
str_println(string);
/* str_length */
printf("size before trimming:\t%zu\n", str_length(string));
/* str_trim */
str_trim(string);
printf("size after trimming:\t%zu\n", str_length(string));
/* str_substr */
str_t substr = str_substr(string, 0, 3);
printf("substr before swap:\t");
str_println(substr);
printf("string before swap:\t");
str_println(string);
str_swap(substr, string);
printf("substr after swap:\t");
str_println(substr);
printf("string after swap:\t");
str_println(string);
printf("is string empty?\t%s\n",
str_isempty(string) ? "Yes" : "No");
printf("is substr equal to string?\t%s\n",
str_compare(substr, string) ? "No" : "Yes");
/* str_readFromFile */
str_readFromFile(string, "neostring.c");
printf("string size: %zu\t", str_length(string));
printf("string capacity: %zu\n", string->capacity);
str_set(string, "ok");
printf("Before trimToSize():\n");
printf("string size: %zu\t", str_length(string));
printf("string capacity: %zu\n", string->capacity);
/* str_trimToSize */
str_trimToSize(string);
printf("After trimToSize():\n");
printf("string size: %zu\t", str_length(string));
printf("string capacity: %zu\n", string->capacity);
str_set(string, "hello, world");
str_println(string);
printf("%zu\n", string->size);
printf("string has prefix ello?\t%s\n", str_hasPrefix(string, "ello") ? "Yes" : "No");
printf("%zu\n", string->size);
printf("string has suffix orld?\t%s\n", str_hasSuffix(string, "orld") ? "Yes" : "No");
/* str_clone */
str_t clone = str_clone(string);
/* str_toupper */
str_toupper(clone);
/* str_writeToFile */
str_writeToFile(clone, "./test.txt");
/* str_destroy */
str_destroy(string);
str_destroy(clone);
str_destroy(substr);
return 0;
}
