ipoe: initialize before_switch function for server contexts

accel-pppd/ctrl/ipoe/dhcpv4.c

@@ -890,6 +890,8 @@ struct dhcpv4_relay *dhcpv4_relay_create(const char *_addr, in_addr_t giaddr, st
 	r->hnd.fd = sock;
 	r->hnd.read = dhcpv4_relay_read;
 
+	r->ctx.before_switch = log_switch;
+
 	triton_context_register(&r->ctx, NULL);
 	triton_md_register_handler(&r->ctx, &r->hnd);
 	triton_md_enable_handler(&r->hnd, MD_MODE_READ);

accel-pppd/ctrl/ipoe/ipoe.c

@@ -2302,6 +2302,7 @@ static void add_interface(const char *ifname, int ifindex, const char *opt, int
 	serv = _malloc(sizeof(*serv));
 	memset(serv, 0, sizeof(*serv));
 	serv->ctx.close = ipoe_serv_close;
+	serv->ctx.before_switch = log_switch;
 	pthread_mutex_init(&serv->lock, NULL);
 	serv->ifname = _strdup(ifname);
 	serv->ifindex = ifindex;
@@ -3078,7 +3079,7 @@ static void ipoe_init(void)
 	disc_item_pool = mempool_create(sizeof(struct disc_item));
 	req_item_pool = mempool_create(sizeof(struct request_item));
 	uc_pool = mempool_create(sizeof(struct unit_cache));
-	
+
 	triton_context_register(&l4_redirect_ctx, NULL);
 	triton_context_wakeup(&l4_redirect_ctx);