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MT#55283 use transparent union

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for flags parsing helper functions, for type safety's sake.

Change-Id: I5378444aa26c3049735398cf8aabd96b990ae33f
pull/1759/head
Richard Fuchs 1 year ago
parent 43b171c714
commit fccf2df73c
1 changed files with 51 additions and 44 deletions
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95
daemon/call_interfaces.c
Unescape View File

@ -33,6 +33,13 @@
#include "dtmf.h"
typedef union {
const struct sdp_attr_helper *attr_helper;
GQueue *q;
GHashTable **htp;
void **generic;
} helper_arg __attribute__ ((__transparent_union__));
static pcre2_code *info_re;
static pcre2_code *streams_re;
@ -41,16 +48,16 @@ bool dtls_passive_def;
INLINE int call_ng_flags_prefix(struct sdp_ng_flags *out, str *s_ori, const char *prefix,
void (*cb)(struct sdp_ng_flags *, str *, void *), void *ptr);
static void call_ng_flags_str_ht(struct sdp_ng_flags *out, str *s, void *htp);
static void call_ng_flags_str_q_multi(struct sdp_ng_flags *out, str *s, void *qp);
void (*cb)(struct sdp_ng_flags *, str *, helper_arg), helper_arg);
static void call_ng_flags_str_ht(struct sdp_ng_flags *out, str *s, helper_arg);
static void call_ng_flags_str_q_multi(struct sdp_ng_flags *out, str *s, helper_arg);
static void call_ng_flags_str_list(struct sdp_ng_flags *out, bencode_item_t *list,
void (*callback)(struct sdp_ng_flags *, str *, void *), void *parm);
void (*callback)(struct sdp_ng_flags *, str *, helper_arg), helper_arg);
static void call_ng_flags_list(struct sdp_ng_flags *out, bencode_item_t *list,
void (*str_callback)(struct sdp_ng_flags *, str *, void *),
void (*item_callback)(struct sdp_ng_flags *, bencode_item_t *, void *),
void *parm);
static void call_ng_flags_esc_str_list(struct sdp_ng_flags *out, str *s, void *qp);
void (*str_callback)(struct sdp_ng_flags *, str *, helper_arg),
void (*item_callback)(struct sdp_ng_flags *, bencode_item_t *, helper_arg),
helper_arg);
static void call_ng_flags_esc_str_list(struct sdp_ng_flags *out, str *s, helper_arg);
static void ng_stats_ssrc(bencode_item_t *dict, struct ssrc_hash *ht);
static str *str_dup_escape(const str *s);
@ -498,7 +505,7 @@ INLINE char *bencode_get_alt(bencode_item_t *i, const char *one, const char *two
return bencode_dictionary_get_str(i, two, out);
}
INLINE void ng_sdes_option(struct sdp_ng_flags *out, str *s, void *dummy) {
INLINE void ng_sdes_option(struct sdp_ng_flags *out, str *s, helper_arg dummy) {
str_hyphenate(s);
/* Accept only certain individual crypto suites */
@ -571,7 +578,7 @@ INLINE void ng_sdes_option(struct sdp_ng_flags *out, str *s, void *dummy) {
}
}
INLINE void ng_osrtp_option(struct sdp_ng_flags *out, str *s, void *dummy) {
INLINE void ng_osrtp_option(struct sdp_ng_flags *out, str *s, helper_arg dummy) {
switch (__csh_lookup(s)) {
case CSH_LOOKUP("accept-rfc"):
case CSH_LOOKUP("accept-RFC"):
@ -598,7 +605,7 @@ INLINE void ng_osrtp_option(struct sdp_ng_flags *out, str *s, void *dummy) {
}
}
static void call_ng_flags_str_pair_ht(struct sdp_ng_flags *out, str *s, void *htp) {
static void call_ng_flags_str_pair_ht(struct sdp_ng_flags *out, str *s, helper_arg arg) {
str *s_copy = str_dup_escape(s);
str token;
if (str_token(&token, s_copy, '>')) {
@ -606,13 +613,13 @@ static void call_ng_flags_str_pair_ht(struct sdp_ng_flags *out, str *s, void *ht
free(s_copy);
return;
}
GHashTable **ht = htp;
GHashTable **ht = arg.htp;
if (!*ht)
*ht = g_hash_table_new_full(str_case_hash, str_case_equal, free, free);
g_hash_table_replace(*ht, str_dup(&token), s_copy);
}
static void call_ng_flags_item_pair_ht(struct sdp_ng_flags *out, bencode_item_t *it, void *htp) {
static void call_ng_flags_item_pair_ht(struct sdp_ng_flags *out, bencode_item_t *it, helper_arg arg) {
str from;
str to;
@ -631,7 +638,7 @@ static void call_ng_flags_item_pair_ht(struct sdp_ng_flags *out, bencode_item_t
str * s_copy_from = str_dup_escape(&from);
str * s_copy_to = str_dup_escape(&to);
GHashTable **ht = htp;
GHashTable **ht = arg.htp;
if (!*ht)
*ht = g_hash_table_new_full(str_case_hash, str_case_equal, free, free);
g_hash_table_replace(*ht, s_copy_from, s_copy_to);
@ -706,7 +713,7 @@ INLINE void ng_sdp_attr_manipulations(struct sdp_ng_flags *flags, bencode_item_t
}
}
INLINE void ng_el_option(struct sdp_ng_flags *out, str *s, void *dummy) {
INLINE void ng_el_option(struct sdp_ng_flags *out, str *s, helper_arg dummy) {
switch (__csh_lookup(s)) {
case CSH_LOOKUP("off"):
out->el_option = EL_OFF;
@ -727,7 +734,7 @@ INLINE void ng_el_option(struct sdp_ng_flags *out, str *s, void *dummy) {
}
#ifdef WITH_TRANSCODING
INLINE void ng_t38_option(struct sdp_ng_flags *out, str *s, void *dummy) {
INLINE void ng_t38_option(struct sdp_ng_flags *out, str *s, helper_arg dummy) {
str_hyphenate(s);
switch (__csh_lookup(s)) {
case CSH_LOOKUP("decode"):
@ -784,16 +791,16 @@ INLINE void ng_t38_option(struct sdp_ng_flags *out, str *s, void *dummy) {
static void call_ng_flags_list(struct sdp_ng_flags *out, bencode_item_t *list,
void (*str_callback)(struct sdp_ng_flags *, str *, void *),
void (*item_callback)(struct sdp_ng_flags *, bencode_item_t *, void *),
void *parm)
void (*str_callback)(struct sdp_ng_flags *, str *, helper_arg),
void (*item_callback)(struct sdp_ng_flags *, bencode_item_t *, helper_arg),
helper_arg arg)
{
str s;
if (list->type != BENCODE_LIST) {
if (bencode_get_str(list, &s)) {
str token;
while (str_token_sep(&token, &s, ',') == 0)
str_callback(out, &token, parm);
str_callback(out, &token, arg);
}
else
ilog(LOG_DEBUG, "Ignoring non-list non-string value");
@ -801,20 +808,20 @@ static void call_ng_flags_list(struct sdp_ng_flags *out, bencode_item_t *list,
}
for (bencode_item_t *it = list->child; it; it = it->sibling) {
if (bencode_get_str(it, &s))
str_callback(out, &s, parm);
str_callback(out, &s, arg);
else if (item_callback)
item_callback(out, it, parm);
item_callback(out, it, arg);
else
ilog(LOG_DEBUG, "Ignoring non-string value in list");
}
}
static void call_ng_flags_str_list(struct sdp_ng_flags *out, bencode_item_t *list,
void (*callback)(struct sdp_ng_flags *, str *, void *), void *parm)
void (*callback)(struct sdp_ng_flags *, str *, helper_arg), helper_arg arg)
{
call_ng_flags_list(out, list, callback, NULL, parm);
call_ng_flags_list(out, list, callback, NULL, arg);
}
static void call_ng_flags_rtcp_mux(struct sdp_ng_flags *out, str *s, void *dummy) {
static void call_ng_flags_rtcp_mux(struct sdp_ng_flags *out, str *s, helper_arg dummy) {
switch (__csh_lookup(s)) {
case CSH_LOOKUP("offer"):
out->rtcp_mux_offer = 1;
@ -836,7 +843,7 @@ static void call_ng_flags_rtcp_mux(struct sdp_ng_flags *out, str *s, void *dummy
STR_FMT(s));
}
}
static void call_ng_flags_replace(struct sdp_ng_flags *out, str *s, void *dummy) {
static void call_ng_flags_replace(struct sdp_ng_flags *out, str *s, helper_arg arg) {
str_hyphenate(s);
switch (__csh_lookup(s)) {
case CSH_LOOKUP("origin"):
@ -867,7 +874,7 @@ static void call_ng_flags_replace(struct sdp_ng_flags *out, str *s, void *dummy)
STR_FMT(s));
}
}
static void call_ng_flags_supports(struct sdp_ng_flags *out, str *s, void *dummy) {
static void call_ng_flags_supports(struct sdp_ng_flags *out, str *s, helper_arg dummy) {
if (!str_cmp(s, "load limit"))
out->supports_load_limit = 1;
else
@ -889,16 +896,16 @@ static str *str_dup_escape(const str *s) {
}
return ret;
}
static void call_ng_flags_esc_str_list(struct sdp_ng_flags *out, str *s, void *qp) {
static void call_ng_flags_esc_str_list(struct sdp_ng_flags *out, str *s, helper_arg arg) {
str *s_copy = str_dup_escape(s);
g_queue_push_tail((GQueue *) qp, s_copy);
g_queue_push_tail(arg.q, s_copy);
}
/**
* Stores flag's value in the given GhashTable.
*/
static void call_ng_flags_str_ht(struct sdp_ng_flags *out, str *s, void *htp) {
static void call_ng_flags_str_ht(struct sdp_ng_flags *out, str *s, helper_arg arg) {
str *s_copy = str_dup_escape(s);
GHashTable **ht = htp;
GHashTable **ht = arg.htp;
if (!*ht)
*ht = g_hash_table_new_full(str_case_hash, str_case_equal, free, NULL);
g_hash_table_replace(*ht, s_copy, s_copy);
@ -907,10 +914,10 @@ static void call_ng_flags_str_ht(struct sdp_ng_flags *out, str *s, void *htp) {
* Parses one-row flags separated by 'delimiter'.
* Stores parsed flag's values then in the given GQueue.
*/
static void call_ng_flags_str_q_multi(struct sdp_ng_flags *out, str *s, void *qp) {
static void call_ng_flags_str_q_multi(struct sdp_ng_flags *out, str *s, helper_arg arg) {
str *s_copy = str_dup_escape(s);
str token;
GQueue *q = qp;
GQueue *q = arg.q;
if (s_copy->len == 0)
ilog(LOG_DEBUG, "Hm, nothing to parse.");
@ -924,8 +931,8 @@ static void call_ng_flags_str_q_multi(struct sdp_ng_flags *out, str *s, void *qp
free(s_copy);
}
#ifdef WITH_TRANSCODING
static void call_ng_flags_str_ht_split(struct sdp_ng_flags *out, str *s, void *htp) {
GHashTable **ht = htp;
static void call_ng_flags_str_ht_split(struct sdp_ng_flags *out, str *s, helper_arg arg) {
GHashTable **ht = arg.htp;
if (!*ht)
*ht = g_hash_table_new_full(str_case_hash, str_case_equal, free, free);
str splitter = *s;
@ -940,7 +947,7 @@ static void call_ng_flags_str_ht_split(struct sdp_ng_flags *out, str *s, void *h
#endif
struct sdp_attr_helper {
void (*fn)(struct sdp_ng_flags *out, str *s, void *);
void (*fn)(struct sdp_ng_flags *out, str *s, helper_arg);
size_t offset;
};
@ -957,7 +964,7 @@ static const struct sdp_attr_helper sdp_attr_helper_substitute = {
.offset = G_STRUCT_OFFSET(struct sdp_manipulations, subst_commands),
};
static void call_ng_flags_sdp_attr_helper(struct sdp_ng_flags *out, str *s, void *helper) {
static void call_ng_flags_sdp_attr_helper(struct sdp_ng_flags *out, str *s, helper_arg arg) {
// get media type
str token;
if (str_token(&token, s, '-'))
@ -967,23 +974,23 @@ static void call_ng_flags_sdp_attr_helper(struct sdp_ng_flags *out, str *s, void
ilog(LOG_WARN, "SDP manipulations: unsupported SDP section '" STR_FORMAT "' targeted.",
STR_FMT(&token));
}
struct sdp_attr_helper *h = helper;
const struct sdp_attr_helper *h = arg.attr_helper;
h->fn(out, s, &G_STRUCT_MEMBER(void *, sm, h->offset));
}
// helper to alias values from other dictionaries into the "flags" dictionary
INLINE int call_ng_flags_prefix(struct sdp_ng_flags *out, str *s_ori, const char *prefix,
void (*cb)(struct sdp_ng_flags *, str *, void *), void *ptr)
void (*cb)(struct sdp_ng_flags *, str *, helper_arg), helper_arg arg)
{
size_t len = strlen(prefix);
str s = *s_ori;
if (len > 0)
if (str_shift_cmp(&s, prefix))
return 0;
cb(out, &s, ptr);
cb(out, &s, arg);
return 1;
}
static void call_ng_flags_flags(struct sdp_ng_flags *out, str *s, void *dummy) {
static void call_ng_flags_flags(struct sdp_ng_flags *out, str *s, helper_arg dummy) {
str_hyphenate(s);
switch (__csh_lookup(s)) {
@ -1189,11 +1196,11 @@ static void call_ng_flags_flags(struct sdp_ng_flags *out, str *s, void *dummy) {
return;
if (call_ng_flags_prefix(out, s, "replace-", call_ng_flags_replace, NULL))
return;
if (call_ng_flags_prefix(out, s, "sdp-attr-add-", call_ng_flags_sdp_attr_helper, (void *) &sdp_attr_helper_add))
if (call_ng_flags_prefix(out, s, "sdp-attr-add-", call_ng_flags_sdp_attr_helper, &sdp_attr_helper_add))
return;
if (call_ng_flags_prefix(out, s, "sdp-attr-remove-", call_ng_flags_sdp_attr_helper, (void *) &sdp_attr_helper_remove))
if (call_ng_flags_prefix(out, s, "sdp-attr-remove-", call_ng_flags_sdp_attr_helper, &sdp_attr_helper_remove))
return;
if (call_ng_flags_prefix(out, s, "sdp-attr-substitute-", call_ng_flags_sdp_attr_helper, (void *) &sdp_attr_helper_substitute))
if (call_ng_flags_prefix(out, s, "sdp-attr-substitute-", call_ng_flags_sdp_attr_helper, &sdp_attr_helper_substitute))
return;
#ifdef WITH_TRANSCODING
if (out->opmode == OP_OFFER || out->opmode == OP_REQUEST || out->opmode == OP_PUBLISH) {

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