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/**
* @file src/contact.c Contacts handling
*
* Copyright (C) 2010 Creytiv.com
*/
#include <re.h>
#include <baresip.h>
enum access {
ACCESS_UNKNOWN = 0,
ACCESS_BLOCK,
ACCESS_ALLOW
};
struct contact {
struct le le;
struct le he; /* hash-element with key 'auri' */
struct sip_addr addr;
char *buf;
enum presence_status status;
enum access access;
};
static struct list cl;
static struct hash *cht;
static void destructor(void *arg)
{
struct contact *c = arg;
hash_unlink(&c->he);
list_unlink(&c->le);
mem_deref(c->buf);
}
/**
* Add a contact
*
* @param contactp Pointer to allocated contact (optional)
* @param addr Contact in SIP address format
*
* @return 0 if success, otherwise errorcode
*/
int contact_add(struct contact **contactp, const struct pl *addr)
{
struct contact *c;
struct pl pl;
int err;
if (!cht)
return EINVAL;
c = mem_zalloc(sizeof(*c), destructor);
if (!c)
return ENOMEM;
err = pl_strdup(&c->buf, addr);
if (err)
goto out;
pl_set_str(&pl, c->buf);
err = sip_addr_decode(&c->addr, &pl);
if (err) {
warning("contact: decode error '%r'\n", addr);
goto out;
}
if (0 == msg_param_decode(&c->addr.params, "access", &pl)) {
if (0 == pl_strcasecmp(&pl, "block")) {
c->access = ACCESS_BLOCK;
}
else if (0 == pl_strcasecmp(&pl, "allow")) {
c->access = ACCESS_ALLOW;
}
else {
warning("contact: unknown 'access=%r' for '%r'\n",
&pl, addr);
err = EINVAL;
goto out;
}
}
else
c->access = ACCESS_UNKNOWN;
c->status = PRESENCE_UNKNOWN;
list_append(&cl, &c->le, c);
hash_append(cht, hash_joaat_pl(&c->addr.auri), &c->he, c);
out:
if (err)
mem_deref(c);
else if (contactp)
*contactp = c;
return err;
}
/**
* Get the SIP address of a contact
*
* @param c Contact
*
* @return SIP Address
*/
struct sip_addr *contact_addr(const struct contact *c)
{
return c ? (struct sip_addr *)&c->addr : NULL;
}
/**
* Get the contact string
*
* @param c Contact
*
* @return Contact string
*/
const char *contact_str(const struct contact *c)
{
return c ? c->buf : NULL;
}
/**
* Get the list of contacts
*
* @return List of contacts
*/
struct list *contact_list(void)
{
return &cl;
}
void contact_set_presence(struct contact *c, enum presence_status status)
{
if (!c)
return;
if (c->status != PRESENCE_UNKNOWN && c->status != status) {
info("<%r> changed status from %s to %s\n", &c->addr.auri,
contact_presence_str(c->status),
contact_presence_str(status));
}
c->status = status;
}
const char *contact_presence_str(enum presence_status status)
{
switch (status) {
default:
case PRESENCE_UNKNOWN: return "\x1b[32mUnknown\x1b[;m";
case PRESENCE_OPEN: return "\x1b[32mOnline\x1b[;m";
case PRESENCE_CLOSED: return "\x1b[31mOffline\x1b[;m";
case PRESENCE_BUSY: return "\x1b[31mBusy\x1b[;m";
}
}
int contacts_print(struct re_printf *pf, void *unused)
{
struct le *le;
int err;
(void)unused;
err = re_hprintf(pf, "\n--- Contacts: (%u) ---\n",
list_count(contact_list()));
for (le = list_head(contact_list()); le && !err; le = le->next) {
const struct contact *c = le->data;
const struct sip_addr *addr = &c->addr;
err = re_hprintf(pf, "%20s %r <%r>\n",
contact_presence_str(c->status),
&addr->dname, &addr->auri);
}
err |= re_hprintf(pf, "\n");
return err;
}
/**
* Initialise the contacts sub-system
*
* @return 0 if success, otherwise errorcode
*/
int contact_init(void)
{
int err = 0;
if (!cht)
err = hash_alloc(&cht, 32);
return err;
}
/**
* Close the contacts sub-system
*/
void contact_close(void)
{
hash_clear(cht);
cht = mem_deref(cht);
list_flush(&cl);
}
static bool find_handler(struct le *le, void *arg)
{
struct contact *c = le->data;
return 0 == pl_strcmp(&c->addr.auri, arg);
}
/**
* Lookup a SIP uri in all registered contacts
*
* @param uri SIP uri to lookup
*
* @return Matching contact if found, otherwise NULL
*/
struct contact *contact_find(const char *uri)
{
return list_ledata(hash_lookup(cht, hash_joaat_str(uri),
find_handler, (void *)uri));
}
/**
* Check the access parameter of a SIP uri
*
* - Matching uri has first presedence
* - Global <sip:*@*> uri has second presedence
*
* @param uri SIP uri to check for access
*
* @return True if blocked, false if allowed
*/
bool contact_block_access(const char *uri)
{
struct contact *c;
c = contact_find(uri);
if (c && c->access != ACCESS_UNKNOWN)
return c->access == ACCESS_BLOCK;
c = contact_find("sip:*@*");
if (c && c->access != ACCESS_UNKNOWN)
return c->access == ACCESS_BLOCK;
return false;
}
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