static void dn_nsp_disc_init(struct sock *sk, struct sk_buff *skb) { struct dn_scp *scp = DN_SK(sk); struct dn_skb_cb *cb = DN_SKB_CB(skb); unsigned short reason; if (skb->len < 2) goto out; reason = le16_to_cpu(*(__le16 *)skb->data); skb_pull(skb, 2); scp->discdata_in.opt_status = cpu_to_le16(reason); scp->discdata_in.opt_optl = 0; memset(scp->discdata_in.opt_data, 0, 16); if (skb->len > 0) { u16 dlen = *skb->data; if ((dlen <= 16) && (dlen <= skb->len)) { scp->discdata_in.opt_optl = cpu_to_le16(dlen); skb_copy_from_linear_data_offset(skb, 1, scp->discdata_in.opt_data, dlen); } } scp->addrrem = cb->src_port; sk->sk_state = TCP_CLOSE; switch(scp->state) { case DN_CI: case DN_CD: scp->state = DN_RJ; sk->sk_err = ECONNREFUSED; break; case DN_RUN: sk->sk_shutdown |= SHUTDOWN_MASK; scp->state = DN_DN; break; case DN_DI: scp->state = DN_DIC; break; } if (!sock_flag(sk, SOCK_DEAD)) { if (sk->sk_socket->state != SS_UNCONNECTED) sk->sk_socket->state = SS_DISCONNECTING; sk->sk_state_change(sk); } if (scp->addrrem) { dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC); } scp->persist_fxn = dn_destroy_timer; scp->persist = dn_nsp_persist(sk); out: kfree_skb(skb); }
static void dn_nsp_disc_init(struct sock *sk, struct sk_buff *skb) { struct dn_scp *scp = DN_SK(sk); struct dn_skb_cb *cb = DN_SKB_CB(skb); unsigned short reason; if (skb->len < 2) goto out; reason = dn_ntohs(*(__u16 *)skb->data); skb_pull(skb, 2); scp->discdata_in.opt_status = reason; scp->discdata_in.opt_optl = 0; memset(scp->discdata_in.opt_data, 0, 16); if (skb->len > 0) { unsigned char dlen = *skb->data; if ((dlen <= 16) && (dlen <= skb->len)) { scp->discdata_in.opt_optl = dlen; memcpy(scp->discdata_in.opt_data, skb->data + 1, dlen); } } scp->addrrem = cb->src_port; sk->state = TCP_CLOSE; switch(scp->state) { case DN_CI: case DN_CD: scp->state = DN_RJ; break; case DN_RUN: sk->shutdown |= SHUTDOWN_MASK; scp->state = DN_DN; break; case DN_DI: scp->state = DN_DIC; break; } if (!sk->dead) { if (sk->socket->state != SS_UNCONNECTED) sk->socket->state = SS_DISCONNECTING; sk->state_change(sk); } dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC); scp->persist_fxn = dn_destroy_timer; scp->persist = dn_nsp_persist(sk); out: kfree_skb(skb); }
static void dn_nsp_disc_init(struct sock *sk, struct sk_buff *skb) { struct dn_scp *scp = DN_SK(sk); struct dn_skb_cb *cb = DN_SKB_CB(skb); unsigned short reason; if (skb->len < 2) goto out; reason = le16_to_cpu(*(__le16 *)skb->data); skb_pull(skb, 2); scp->discdata_in.opt_status = cpu_to_le16(reason); scp->discdata_in.opt_optl = 0; memset(scp->discdata_in.opt_data, 0, 16); if (skb->len > 0) { u16 dlen = *skb->data; if ((dlen <= 16) && (dlen <= skb->len)) { scp->discdata_in.opt_optl = cpu_to_le16(dlen); skb_copy_from_linear_data_offset(skb, 1, scp->discdata_in.opt_data, dlen); } } scp->addrrem = cb->src_port; sk->sk_state = TCP_CLOSE; switch (scp->state) { case DN_CI: case DN_CD: scp->state = DN_RJ; sk->sk_err = ECONNREFUSED; break; case DN_RUN: sk->sk_shutdown |= SHUTDOWN_MASK; scp->state = DN_DN; break; case DN_DI: scp->state = DN_DIC; break; } if (!sock_flag(sk, SOCK_DEAD)) { if (sk->sk_socket->state != SS_UNCONNECTED) sk->sk_socket->state = SS_DISCONNECTING; sk->sk_state_change(sk); } /* * It appears that its possible for remote machines to send disc * init messages with no port identifier if we are in the CI and * possibly also the CD state. Obviously we shouldn't reply with * a message if we don't know what the end point is. */ if (scp->addrrem) { dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC); } scp->persist_fxn = dn_destroy_timer; scp->persist = dn_nsp_persist(sk); out: kfree_skb(skb); }