/**
* Looks for the group's matched destination address in a list of addresses.
* Returns 1 if found, 0 if not found
*/
int addr_in_list(int listidx, uint32_t *addrlist, int size)
{
int i, rval;
if (group_list[listidx].destaddr.s_addr == 0) {
rval = interface_in_list(addrlist, size);
if (rval == -1) {
return 0;
} else {
group_list[listidx].destaddr = m_interface[rval].addr;
return 1;
}
}
for (i = 0; i < size; i++) {
if (addrlist[i] == 0) {
return 0;
}
if (group_list[listidx].destaddr.s_addr == addrlist[i]) {
return 1;
}
}
return 0;
}
void update_interfaces()
{
struct int_sock *new_list=NULL;
struct int_sock *i=NULL,*j,*prev;
struct int_sock *new_int=NULL;
int i_fd,o_fd;
/* if all interfaces are '+'-interfaces, we bridge broadcast */
do_broadcast_bridging=1;
update_interface_trigger=0;
syslog(LOG_DEBUG,"rechecking interfaces");
if (read_sys(&new_list))
return;
for (i=select_set.i_s_list; i; i=i->next) {
if (!interface_in_list(i,new_list)) {
/* remove interface i */
j=select_set.i_s_list;
prev=NULL;
while (j) {
if (!strncmp(j->dev_name,i->dev_name,
DEV_NAME_LEN)) {
if (!prev) {
select_set.i_s_list=j->next;
} else {
prev->next=j->next;
}
prev=j;
j=j->next;
free(j);
} else {
j=j->next;
}
}
/* and close the socket */
close(i->i_fd);
close(i->o_fd);
syslog(LOG_INFO,"removed interface %s",i->dev_name);
}
}
for (i=new_list; i; i=i->next) {
if (!interface_in_list(i,select_set.i_s_list)) {
/* add interface i */
new_int=malloc(sizeof(struct int_sock));
if (!new_int) {
syslog(LOG_ERR,"can't add interface %s -- " \
"no memory",i->dev_name);
continue;
}
i_fd=open_incoming_socket(i->dev_name);
if (i_fd==-1) {
free(new_int);
continue;
}
o_fd=open_outgoing_socket(i->dev_name);
if (o_fd==-1) {
close(i_fd);
free(new_int);
continue;
}
strncpy(new_int->dev_name,i->dev_name,DEV_NAME_LEN);
new_int->i_fd=i_fd;
new_int->o_fd=o_fd;
new_int->features=i->features;
new_int->next=select_set.i_s_list;
select_set.i_s_list=new_int;
syslog(LOG_INFO,"added interface %s",i->dev_name);
}
}
/* kill temporary new_list */
while (new_list) {
i=new_list->next;
free(new_list);
new_list=i;
}
/* prepare the fd_set for select */
FD_ZERO(&select_set.fds);
for (i=select_set.i_s_list; i; i=i->next) {
FD_SET(i->i_fd,&select_set.fds);
select_set.highest_fd=(i->i_fd>select_set.highest_fd)?
i->i_fd:select_set.highest_fd;
}
}
