void tipc_disc_recv_msg(struct sk_buff *buf, struct bearer *b_ptr)
{
struct link *link;
struct tipc_media_addr media_addr;
struct tipc_msg *msg = buf_msg(buf);
u32 dest = msg_dest_domain(msg);
u32 orig = msg_prevnode(msg);
u32 net_id = msg_bc_netid(msg);
u32 type = msg_type(msg);
msg_get_media_addr(msg, &media_addr);
buf_discard(buf);
if (net_id != tipc_net_id)
return;
if (!tipc_addr_domain_valid(dest))
return;
if (!tipc_addr_node_valid(orig))
return;
if (orig == tipc_own_addr) {
if (memcmp(&media_addr, &b_ptr->publ.addr, sizeof(media_addr)))
disc_dupl_alert(b_ptr, tipc_own_addr, &media_addr);
return;
}
if (!tipc_in_scope(dest, tipc_own_addr))
return;
if (in_own_cluster(orig)) {
/* Always accept link here */
struct sk_buff *rbuf;
struct tipc_media_addr *addr;
struct tipc_node *n_ptr = tipc_node_find(orig);
int link_fully_up;
if (n_ptr == NULL) {
n_ptr = tipc_node_create(orig);
if (!n_ptr)
return;
}
spin_lock_bh(&n_ptr->lock);
/* Don't talk to neighbor during cleanup after last session */
if (n_ptr->cleanup_required) {
spin_unlock_bh(&n_ptr->lock);
return;
}
link = n_ptr->links[b_ptr->identity];
if (!link) {
link = tipc_link_create(b_ptr, orig, &media_addr);
if (!link) {
spin_unlock_bh(&n_ptr->lock);
return;
}
}
addr = &link->media_addr;
if (memcmp(addr, &media_addr, sizeof(*addr))) {
if (tipc_link_is_up(link) || (!link->started)) {
disc_dupl_alert(b_ptr, orig, &media_addr);
spin_unlock_bh(&n_ptr->lock);
return;
}
warn("Resetting link <%s>, peer interface address changed\n",
link->name);
memcpy(addr, &media_addr, sizeof(*addr));
tipc_link_reset(link);
}
link_fully_up = link_working_working(link);
spin_unlock_bh(&n_ptr->lock);
if ((type == DSC_RESP_MSG) || link_fully_up)
return;
rbuf = tipc_disc_init_msg(DSC_RESP_MSG, 1, orig, b_ptr);
if (rbuf != NULL) {
b_ptr->media->send_msg(rbuf, &b_ptr->publ, &media_addr);
buf_discard(rbuf);
}
}
}
void tipc_disc_recv_msg(struct sk_buff *buf, struct bearer *b_ptr)
{
struct link *link;
struct tipc_media_addr media_addr;
struct tipc_msg *msg = buf_msg(buf);
u32 dest = msg_dest_domain(msg);
u32 orig = msg_prevnode(msg);
u32 net_id = msg_bc_netid(msg);
u32 type = msg_type(msg);
msg_get_media_addr(msg,&media_addr);
msg_dbg(msg, "RECV:");
buf_discard(buf);
if (net_id != tipc_net_id)
return;
if (!tipc_addr_domain_valid(dest))
return;
if (!tipc_addr_node_valid(orig))
return;
if (orig == tipc_own_addr) {
if (memcmp(&media_addr, &b_ptr->publ.addr, sizeof(media_addr)))
disc_dupl_alert(b_ptr, tipc_own_addr, &media_addr);
return;
}
if (!in_scope(dest, tipc_own_addr))
return;
if (is_slave(tipc_own_addr) && is_slave(orig))
return;
if (is_slave(orig) && !in_own_cluster(orig))
return;
if (in_own_cluster(orig)) {
/* Always accept link here */
struct sk_buff *rbuf;
struct tipc_media_addr *addr;
struct tipc_node *n_ptr = tipc_node_find(orig);
int link_fully_up;
dbg(" in own cluster\n");
if (n_ptr == NULL) {
n_ptr = tipc_node_create(orig);
if (!n_ptr)
return;
}
spin_lock_bh(&n_ptr->lock);
link = n_ptr->links[b_ptr->identity];
if (!link) {
dbg("creating link\n");
link = tipc_link_create(b_ptr, orig, &media_addr);
if (!link) {
spin_unlock_bh(&n_ptr->lock);
return;
}
}
addr = &link->media_addr;
if (memcmp(addr, &media_addr, sizeof(*addr))) {
if (tipc_link_is_up(link) || (!link->started)) {
disc_dupl_alert(b_ptr, orig, &media_addr);
spin_unlock_bh(&n_ptr->lock);
return;
}
warn("Resetting link <%s>, peer interface address changed\n",
link->name);
memcpy(addr, &media_addr, sizeof(*addr));
tipc_link_reset(link);
}
link_fully_up = (link->state == WORKING_WORKING);
spin_unlock_bh(&n_ptr->lock);
if ((type == DSC_RESP_MSG) || link_fully_up)
return;
rbuf = tipc_disc_init_msg(DSC_RESP_MSG, 1, orig, b_ptr);
if (rbuf != NULL) {
msg_dbg(buf_msg(rbuf),"SEND:");
b_ptr->media->send_msg(rbuf, &b_ptr->publ, &media_addr);
buf_discard(rbuf);
}
}
}
void tipc_disc_recv_msg(struct sk_buff *buf)
{
struct bearer *b_ptr = (struct bearer *)TIPC_SKB_CB(buf)->handle;
struct link *link;
struct tipc_media_addr media_addr;
struct tipc_msg *msg = buf_msg(buf);
u32 dest = msg_dest_domain(msg);
u32 orig = msg_prevnode(msg);
u32 net_id = msg_bc_netid(msg);
u32 type = msg_type(msg);
msg_get_media_addr(msg,&media_addr);
msg_dbg(msg, "RECV:");
buf_discard(buf);
if (net_id != tipc_net_id)
return;
if (!tipc_addr_domain_valid(dest))
return;
if (!tipc_addr_node_valid(orig))
return;
if (orig == tipc_own_addr)
return;
if (!in_scope(dest, tipc_own_addr))
return;
if (is_slave(tipc_own_addr) && is_slave(orig))
return;
if (is_slave(orig) && !in_own_cluster(orig))
return;
if (in_own_cluster(orig)) {
/* Always accept link here */
struct sk_buff *rbuf;
struct tipc_media_addr *addr;
struct node *n_ptr = tipc_node_find(orig);
int link_up;
dbg(" in own cluster\n");
if (n_ptr == NULL) {
n_ptr = tipc_node_create(orig);
}
if (n_ptr == NULL) {
warn("Memory squeeze; Failed to create node\n");
return;
}
spin_lock_bh(&n_ptr->lock);
link = n_ptr->links[b_ptr->identity];
if (!link) {
dbg("creating link\n");
link = tipc_link_create(b_ptr, orig, &media_addr);
if (!link) {
spin_unlock_bh(&n_ptr->lock);
return;
}
}
addr = &link->media_addr;
if (memcmp(addr, &media_addr, sizeof(*addr))) {
char addr_string[16];
warn("New bearer address for %s\n",
addr_string_fill(addr_string, orig));
memcpy(addr, &media_addr, sizeof(*addr));
tipc_link_reset(link);
}
link_up = tipc_link_is_up(link);
spin_unlock_bh(&n_ptr->lock);
if ((type == DSC_RESP_MSG) || link_up)
return;
rbuf = tipc_disc_init_msg(DSC_RESP_MSG, 1, orig, b_ptr);
if (rbuf != NULL) {
msg_dbg(buf_msg(rbuf),"SEND:");
b_ptr->media->send_msg(rbuf, &b_ptr->publ, &media_addr);
buf_discard(rbuf);
}
}
}