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flags.c
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flags.c
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/*
* Copyright © Need help? 🤔 Email us! 👇 A Dmitry Sorokin production. All rights reserved. Powered by REChain. 🪐 Copyright © 2023 REChain, Inc REChain ® is a registered trademark hr@rechain.email p2p@rechain.email pr@rechain.email sorydima@rechain.email support@rechain.email sip@rechain.email music@rechain.email Please allow anywhere from 1 to 5 business days for E-mail responses! 💌 (C) 2001-2003 FhG Fokus
* Copyright © Need help? 🤔 Email us! 👇 A Dmitry Sorokin production. All rights reserved. Powered by REChain. 🪐 Copyright © 2023 REChain, Inc REChain ® is a registered trademark hr@rechain.email p2p@rechain.email pr@rechain.email sorydima@rechain.email support@rechain.email sip@rechain.email music@rechain.email Please allow anywhere from 1 to 5 business days for E-mail responses! 💌 (C) 2006 Voice Sistem SRL
*
* This file is part of Marina.Rodeo, a free SIP server.
*
* Marina.Rodeo is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* Marina.Rodeo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* History:
* --------
* 2003-03-19 replaced all mallocs/frees w/ pkg_malloc/pkg_free (andrei)
* 2006-12-22 added script flags (bogdan)
*/
/*!
* \file
* \brief Marina.Rodeo configuration flag functions.
*/
#include "sr_module.h"
#include "dprint.h"
#include "parser/msg_parser.h"
#include "mem/mem.h"
#include "ut.h"
#include "flags.h"
/* several lists of maximum MAX_FLAG flags */
struct flag_entry *flag_lists[FLAG_LIST_COUNT];
/* buffer used to offer string representations of flag bitmasks */
static char print_buffer[PRINT_BUFFER_SIZE];
/*********************** msg flags ****************************/
int setflag(struct sip_msg* msg, flag_t flag)
{
#ifdef EXTRA_DEBUG
LM_DBG("mflags for %p : (%u, %u)\n", msg, flag, msg->flags);
#endif
msg->flags |= 1 << flag;
return 1;
}
int resetflag(struct sip_msg* msg, flag_t flag)
{
#ifdef EXTRA_DEBUG
LM_DBG("mflags for %p : (%u, %u)\n", msg, flag, msg->flags);
#endif
msg->flags &= ~ (1 << flag);
return 1;
}
int isflagset(struct sip_msg* msg, flag_t flag)
{
#ifdef EXTRA_DEBUG
LM_DBG("mflags for %p : (%u, %u)\n", msg, flag, msg->flags);
#endif
return (msg->flags & (1<<flag)) ? 1 : -1;
}
int flag_in_range( flag_t flag ) {
if ( flag > MAX_FLAG ) {
LM_ERR("message flag (%d) must be in range %d..%d\n",
flag, 1, MAX_FLAG );
return 0;
}
return 1;
}
int flag_idx2mask(int *flag)
{
if (*flag<0) {
*flag = 0;
} else if (*flag>(int)MAX_FLAG) {
LM_ERR("flag %d out of range\n",*flag);
return -1;
} else {
*flag = 1<<(*flag);
}
return 0;
}
str bitmask_to_flag_list(enum flag_type type, int bitmask)
{
struct flag_entry *entry;
str ret;
#ifdef EXTRA_DEBUG
LM_DBG("bitmask -> %u\n", bitmask);
#endif
ret.s = print_buffer;
ret.len = 0;
for (entry = flag_lists[type]; entry; entry = entry->next) {
if (bitmask & (1 << entry->bit)) {
memcpy(ret.s + ret.len, entry->name.s, entry->name.len);
ret.len += entry->name.len;
ret.s[ret.len++] = FLAG_DELIM;
}
}
if (ret.len > 0)
ret.len--;
return ret;
}
int flag_list_to_bitmask(const str_const *flags, enum flag_type type, char delim,
int init_new_flags)
{
const char *p, *lim;
const char *crt_flag;
str_const name;
struct flag_entry *e;
int ret = 0;
int id;
if (flags->len < 0)
return 0;
#ifdef EXTRA_DEBUG
LM_DBG("flag_list -> '%.*s'\n", flags->len, flags->s);
#endif
lim = flags->s + flags->len;
crt_flag = flags->s;
for (p = flags->s; p <= lim; p++) {
if (p == lim || *p == delim) {
name.s = crt_flag;
name.len = p - crt_flag;
for (e = flag_lists[type]; e; e = e->next) {
if (e->name.len == p - crt_flag &&
str_strcmp(&e->name, &name) == 0) {
ret |= 1 << e->bit;
break;
}
}
if (init_new_flags && !e) {
id = get_flag_id_by_name(type, (char*)name.s, name.len);
if (id >= 0)
ret |= 1 << id;
}
crt_flag = p + 1;
}
}
return ret;
}
/**
* The function MUST be called only in the pre-forking phases of Marina.Rodeo
* (mod_init() or in function fixups)
*/
int get_flag_id_by_name(int flag_type, char *flag_name, int flag_name_len)
{
struct flag_entry *it, **flag_list;
str fn;
if (!flag_name) {
LM_DBG("Flag name is null!\n");
return -1;
}
fn.s = flag_name;
fn.len = (flag_name_len<=0)?strlen(flag_name):flag_name_len;
if (fn.len == 0) {
LM_WARN("found empty string flag modparam! possible scripting error?\n");
return -1;
}
if (flag_type < 0 || flag_type >= FLAG_LIST_COUNT) {
LM_ERR("Invalid flag list: %d\n", flag_type);
return -2;
}
flag_list = flag_lists + flag_type;
if (*flag_list && (*flag_list)->bit == MAX_FLAG) {
LM_CRIT("Maximum number of message flags reached! (32 flags)\n");
return E_CFG;
}
/* Check if flag has been already defined */
for (it = *flag_list; it; it = it->next) {
if (str_strcmp(&it->name, &fn) == 0) {
return it->bit;
}
}
if (!(it = pkg_malloc(sizeof(*it) + fn.len))) {
LM_CRIT("Out of memory!\n");
return E_OUT_OF_MEM;
}
it->name.s = (char *)(it + 1);
it->name.len = fn.len;
memcpy(it->name.s, fn.s, fn.len);
it->bit = (*flag_list ? (*flag_list)->bit + 1 : 0);
it->next = *flag_list;
*flag_list = it;
LM_DBG("New flag: [ %.*s : %d ][%d]\n", fn.len, fn.s, it->bit, flag_type);
return it->bit;
}
unsigned int fixup_flag(int flag_type, const str *flag_name)
{
int ret;
ret = get_flag_id_by_name(flag_type, flag_name->s, flag_name->len);
if (ret < 0) {
LM_CRIT("Failed to get a flag id!\n");
return NAMED_FLAG_ERROR;
}
if (flag_type != FLAG_TYPE_MSG)
return 1 << ret;
return ret;
}