/* * connection-level Rx packet processor */ static int rxrpc_process_event(struct rxrpc_connection *conn, struct sk_buff *skb, u32 *_abort_code) { struct rxrpc_skb_priv *sp = rxrpc_skb(skb); __be32 wtmp; u32 abort_code; int loop, ret; if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { kleave(" = -ECONNABORTED [%u]", conn->state); return -ECONNABORTED; } _enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial); switch (sp->hdr.type) { case RXRPC_PACKET_TYPE_ABORT: if (skb_copy_bits(skb, 0, &wtmp, sizeof(wtmp)) < 0) return -EPROTO; abort_code = ntohl(wtmp); _proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code); conn->state = RXRPC_CONN_REMOTELY_ABORTED; rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED, abort_code); return -ECONNABORTED; case RXRPC_PACKET_TYPE_CHALLENGE: return conn->security->respond_to_challenge(conn, skb, _abort_code); case RXRPC_PACKET_TYPE_RESPONSE: ret = conn->security->verify_response(conn, skb, _abort_code); if (ret < 0) return ret; ret = conn->security->init_connection_security(conn); if (ret < 0) return ret; conn->security->prime_packet_security(conn); read_lock_bh(&conn->lock); spin_lock(&conn->state_lock); if (conn->state == RXRPC_CONN_SERVER_CHALLENGING) { conn->state = RXRPC_CONN_SERVER; for (loop = 0; loop < RXRPC_MAXCALLS; loop++) rxrpc_call_is_secure(conn->channels[loop]); } spin_unlock(&conn->state_lock); read_unlock_bh(&conn->lock); return 0; default: _leave(" = -EPROTO [%u]", sp->hdr.type); return -EPROTO; } }
/* * connection-level Rx packet processor */ static int rxrpc_process_event(struct rxrpc_connection *conn, struct sk_buff *skb, u32 *_abort_code) { struct rxrpc_skb_priv *sp = rxrpc_skb(skb); __be32 wtmp; u32 abort_code; int loop, ret; if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) { _leave(" = -ECONNABORTED [%u]", conn->state); return -ECONNABORTED; } _enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, sp->hdr.serial); switch (sp->hdr.type) { case RXRPC_PACKET_TYPE_DATA: case RXRPC_PACKET_TYPE_ACK: rxrpc_conn_retransmit_call(conn, skb, sp->hdr.cid & RXRPC_CHANNELMASK); return 0; case RXRPC_PACKET_TYPE_BUSY: /* Just ignore BUSY packets for now. */ return 0; case RXRPC_PACKET_TYPE_ABORT: if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header), &wtmp, sizeof(wtmp)) < 0) { trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, tracepoint_string("bad_abort")); return -EPROTO; } abort_code = ntohl(wtmp); _proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code); conn->state = RXRPC_CONN_REMOTELY_ABORTED; rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED, abort_code, -ECONNABORTED); return -ECONNABORTED; case RXRPC_PACKET_TYPE_CHALLENGE: return conn->security->respond_to_challenge(conn, skb, _abort_code); case RXRPC_PACKET_TYPE_RESPONSE: ret = conn->security->verify_response(conn, skb, _abort_code); if (ret < 0) return ret; ret = conn->security->init_connection_security(conn); if (ret < 0) return ret; ret = conn->security->prime_packet_security(conn); if (ret < 0) return ret; spin_lock(&conn->channel_lock); spin_lock(&conn->state_lock); if (conn->state == RXRPC_CONN_SERVICE_CHALLENGING) { conn->state = RXRPC_CONN_SERVICE; spin_unlock(&conn->state_lock); for (loop = 0; loop < RXRPC_MAXCALLS; loop++) rxrpc_call_is_secure( rcu_dereference_protected( conn->channels[loop].call, lockdep_is_held(&conn->channel_lock))); } else { spin_unlock(&conn->state_lock); } spin_unlock(&conn->channel_lock); return 0; default: trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, tracepoint_string("bad_conn_pkt")); return -EPROTO; } }