X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Fapplication_interface.h;h=bf9467690287276a6cd1c68bf2a6c80e7c2f8b59;hp=50c043493f2c74994b58e18b5e061eaac4d32aea;hb=2de9c0f92;hpb=3c2fed5145d9e40a9ecd178c2866c813eddc6203 diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h index 50c043493f2..bf946769028 100644 --- a/src/vnet/session/application_interface.h +++ b/src/vnet/session/application_interface.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2016 Cisco and/or its affiliates. + * Copyright (c) 2016-2019 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: @@ -15,51 +15,100 @@ #ifndef __included_uri_h__ #define __included_uri_h__ -#include -#include -#include -#include -#include +#include +#include +#include +#include +#include -typedef struct _vnet_app_attach_args_t +typedef struct certificate_ { - /** Binary API client index */ - u32 api_client_index; + u32 *app_interests; /* vec of application index asking for deletion cb */ + u32 cert_key_index; /* index in cert & key pool */ + u8 *key; + u8 *cert; +} app_cert_key_pair_t; - /** Application name. Used by builtin apps */ - u8 *name; +typedef struct session_cb_vft_ +{ + /** Notify server of new segment */ + int (*add_segment_callback) (u32 app_wrk_index, u64 segment_handle); - /** Application and segment manager options */ - u64 *options; + /** Notify server of new segment */ + int (*del_segment_callback) (u32 app_wrk_index, u64 segment_handle); - /** ID of the namespace the app has access to */ - u8 *namespace_id; + /** Notify server of newly accepted session */ + int (*session_accept_callback) (session_t * new_session); - /** Session to application callback functions */ - session_cb_vft_t *session_cb_vft; + /** Connection request callback */ + int (*session_connected_callback) (u32 app_wrk_index, u32 opaque, + session_t * s, u8 code); - /* - * Results - */ - ssvm_private_t *segment; - u64 app_event_queue_address; - u32 app_index; + /** Notify app that session is closing */ + void (*session_disconnect_callback) (session_t * s); + + /** Notify app that transport is closed */ + void (*session_transport_closed_callback) (session_t * s); + + /** Notify app that session or transport are about to be removed */ + void (*session_cleanup_callback) (session_t * s, session_cleanup_ntf_t ntf); + + /** Notify app that session was reset */ + void (*session_reset_callback) (session_t * s); + + /** Notify app that session pool migration happened */ + void (*session_migrate_callback) (session_t * s, session_handle_t new_sh); + + /** Direct RX callback for built-in application */ + int (*builtin_app_rx_callback) (session_t * session); + + /** Direct TX callback for built-in application */ + int (*builtin_app_tx_callback) (session_t * session); + + /** Cert and key pair delete notification */ + int (*app_cert_key_pair_delete_callback) (app_cert_key_pair_t * ckpair); + + /** Delegate fifo-tuning-logic to application */ + int (*fifo_tuning_callback) (session_t * s, svm_fifo_t * f, + session_ft_action_t act, u32 bytes); + +} session_cb_vft_t; + +#define foreach_app_init_args \ + _(u32, api_client_index) \ + _(u8 *, name) \ + _(u64 *, options) \ + _(u8 *, namespace_id) \ + _(session_cb_vft_t *, session_cb_vft) \ + _(u32, app_index) \ + +typedef struct _vnet_app_attach_args_t +{ +#define _(_type, _name) _type _name; + foreach_app_init_args +#undef _ + ssvm_private_t * segment; + svm_msg_q_t *app_evt_q; + u64 segment_handle; } vnet_app_attach_args_t; typedef struct _vnet_app_detach_args_t { u32 app_index; + u32 api_client_index; } vnet_app_detach_args_t; typedef struct _vnet_bind_args_t { union { - char *uri; + session_endpoint_cfg_t sep_ext; session_endpoint_t sep; + char *uri; }; u32 app_index; + u32 wrk_map_index; /* * Results @@ -68,26 +117,29 @@ typedef struct _vnet_bind_args_t u32 segment_name_length; u64 server_event_queue_address; u64 handle; -} vnet_bind_args_t; +} vnet_listen_args_t; -typedef struct _vnet_unbind_args_t +typedef struct _vnet_unlisten_args_t { union { char *uri; - u64 handle; + u64 handle; /**< Session handle */ }; - u32 app_index; -} vnet_unbind_args_t; + u32 app_index; /**< Owning application index */ + u32 wrk_map_index; /**< App's local pool worker index */ +} vnet_unlisten_args_t; typedef struct _vnet_connect_args { union { + session_endpoint_cfg_t sep_ext; + session_endpoint_t sep; char *uri; - session_endpoint_extended_t sep; }; u32 app_index; + u32 wrk_map_index; u32 api_context; session_handle_t session_handle; @@ -111,6 +163,32 @@ typedef struct _vnet_application_add_tls_key_args_t u8 *key; } vnet_app_add_tls_key_args_t; +typedef enum crypto_engine_type_ +{ + CRYPTO_ENGINE_NONE, + CRYPTO_ENGINE_OPENSSL, + CRYPTO_ENGINE_MBEDTLS, + CRYPTO_ENGINE_VPP, + CRYPTO_ENGINE_PICOTLS, + CRYPTO_ENGINE_LAST = CRYPTO_ENGINE_PICOTLS, +} crypto_engine_type_t; + +typedef struct _vnet_app_add_cert_key_pair_args_ +{ + u8 *cert; + u8 *key; + u32 index; +} vnet_app_add_cert_key_pair_args_t; + +typedef struct crypto_ctx_ +{ + u32 ctx_index; /**< index in crypto context pool */ + u32 n_subscribers; /**< refcount of sessions using said context */ + u32 ckpair_index; /**< certificate & key */ + u8 crypto_engine; + void *data; /**< protocol specific data */ +} crypto_context_t; + /* Application attach options */ typedef enum { @@ -127,6 +205,10 @@ typedef enum APP_OPTIONS_PROXY_TRANSPORT, APP_OPTIONS_ACCEPT_COOKIE, APP_OPTIONS_TLS_ENGINE, + APP_OPTIONS_MAX_FIFO_SIZE, + APP_OPTIONS_HIGH_WATERMARK, + APP_OPTIONS_LOW_WATERMARK, + APP_OPTIONS_PCT_FIRST_ALLOC, APP_OPTIONS_N_OPTIONS } app_attach_options_index_t; @@ -134,9 +216,11 @@ typedef enum _(ACCEPT_REDIRECT, "Use FIFO with redirects") \ _(ADD_SEGMENT, "Add segment and signal app if needed") \ _(IS_BUILTIN, "Application is builtin") \ + _(IS_TRANSPORT_APP, "Application is a transport proto") \ _(IS_PROXY, "Application is proxying") \ _(USE_GLOBAL_SCOPE, "App can use global session scope") \ _(USE_LOCAL_SCOPE, "App can use local session scope") \ + _(EVT_MQ_USE_EVENTFD, "Use eventfds for signaling") \ typedef enum _app_options { @@ -152,24 +236,45 @@ typedef enum _app_options_flags #undef _ } app_options_flags_t; -int vnet_bind_uri (vnet_bind_args_t *); -int vnet_unbind_uri (vnet_unbind_args_t * a); -clib_error_t *vnet_connect_uri (vnet_connect_args_t * a); +#define foreach_fd_type \ + _(VPP_MQ_SEGMENT, "Fd for vpp's event mq segment") \ + _(MEMFD_SEGMENT, "Fd for memfd segment") \ + _(MQ_EVENTFD, "Event fd used by message queue") \ + _(VPP_MQ_EVENTFD, "Event fd used by vpp's message queue") \ + +typedef enum session_fd_type_ +{ +#define _(sym, str) SESSION_FD_##sym, + foreach_fd_type +#undef _ + SESSION_N_FD_TYPE +} session_fd_type_t; + +typedef enum session_fd_flag_ +{ +#define _(sym, str) SESSION_FD_F_##sym = 1 << SESSION_FD_##sym, + foreach_fd_type +#undef _ +} session_fd_flag_t; + +int parse_uri (char *uri, session_endpoint_cfg_t * sep); +int vnet_bind_uri (vnet_listen_args_t *); +int vnet_unbind_uri (vnet_unlisten_args_t * a); +int vnet_connect_uri (vnet_connect_args_t * a); -clib_error_t *vnet_application_attach (vnet_app_attach_args_t * a); -clib_error_t *vnet_bind (vnet_bind_args_t * a); -clib_error_t *vnet_connect (vnet_connect_args_t * a); -clib_error_t *vnet_unbind (vnet_unbind_args_t * a); +int vnet_application_attach (vnet_app_attach_args_t * a); int vnet_application_detach (vnet_app_detach_args_t * a); +int vnet_listen (vnet_listen_args_t * a); +int vnet_connect (vnet_connect_args_t * a); +int vnet_unlisten (vnet_unlisten_args_t * a); int vnet_disconnect_session (vnet_disconnect_args_t * a); clib_error_t *vnet_app_add_tls_cert (vnet_app_add_tls_cert_args_t * a); clib_error_t *vnet_app_add_tls_key (vnet_app_add_tls_key_args_t * a); - -extern const char test_srv_crt_rsa[]; -extern const u32 test_srv_crt_rsa_len; -extern const char test_srv_key_rsa[]; -extern const u32 test_srv_key_rsa_len; +int vnet_app_add_cert_key_pair (vnet_app_add_cert_key_pair_args_t * a); +int vnet_app_del_cert_key_pair (u32 index); +/** Ask for app cb on pair deletion */ +int vnet_app_add_cert_key_interest (u32 index, u32 app_index); typedef struct app_session_transport_ { @@ -197,6 +302,251 @@ typedef struct #undef _ } app_session_t; +typedef struct session_listen_msg_ +{ + u32 client_index; + u32 context; /* Not needed but keeping it for compatibility with bapi */ + u32 wrk_index; + u32 vrf; + u16 port; + u8 proto; + u8 is_ip4; + ip46_address_t ip; + u32 ckpair_index; + u8 crypto_engine; +} __clib_packed session_listen_msg_t; + +STATIC_ASSERT (sizeof (session_listen_msg_t) <= SESSION_CTRL_MSG_MAX_SIZE, + "msg too large"); + +typedef struct session_listen_uri_msg_ +{ + u32 client_index; + u32 context; + u8 uri[56]; +} __clib_packed session_listen_uri_msg_t; + +STATIC_ASSERT (sizeof (session_listen_uri_msg_t) <= SESSION_CTRL_MSG_MAX_SIZE, + "msg too large"); + +typedef struct session_bound_msg_ +{ + u32 context; + u64 handle; + i32 retval; + u8 lcl_is_ip4; + u8 lcl_ip[16]; + u16 lcl_port; + uword rx_fifo; + uword tx_fifo; + uword vpp_evt_q; + u32 segment_size; + u8 segment_name_length; + u8 segment_name[128]; +} __clib_packed session_bound_msg_t; + +typedef struct session_unlisten_msg_ +{ + u32 client_index; + u32 context; + u32 wrk_index; + session_handle_t handle; +} __clib_packed session_unlisten_msg_t; + +typedef struct session_unlisten_reply_msg_ +{ + u32 context; + u64 handle; + i32 retval; +} __clib_packed session_unlisten_reply_msg_t; + +typedef struct session_accepted_msg_ +{ + u32 context; + u64 listener_handle; + u64 handle; + uword server_rx_fifo; + uword server_tx_fifo; + u64 segment_handle; + uword vpp_event_queue_address; + transport_endpoint_t rmt; + u8 flags; +} __clib_packed session_accepted_msg_t; + +typedef struct session_accepted_reply_msg_ +{ + u32 context; + i32 retval; + u64 handle; +} __clib_packed session_accepted_reply_msg_t; + +typedef struct session_connect_msg_ +{ + u32 client_index; + u32 context; + u32 wrk_index; + u32 vrf; + u16 port; + u8 proto; + u8 is_ip4; + ip46_address_t ip; + ip46_address_t lcl_ip; + u8 hostname_len; + u8 hostname[16]; + u64 parent_handle; + u32 ckpair_index; + u8 crypto_engine; + u8 flags; +} __clib_packed session_connect_msg_t; + +STATIC_ASSERT (sizeof (session_connect_msg_t) <= SESSION_CTRL_MSG_MAX_SIZE, + "msg too large"); + +typedef struct session_connect_uri_msg_ +{ + u32 client_index; + u32 context; + u8 uri[56]; +} __clib_packed session_connect_uri_msg_t; + +STATIC_ASSERT (sizeof (session_connect_uri_msg_t) <= + SESSION_CTRL_MSG_MAX_SIZE, "msg too large"); + +typedef struct session_connected_msg_ +{ + u32 context; + i32 retval; + u64 handle; + uword server_rx_fifo; + uword server_tx_fifo; + u64 segment_handle; + uword ct_rx_fifo; + uword ct_tx_fifo; + u64 ct_segment_handle; + uword vpp_event_queue_address; + u32 segment_size; + u8 segment_name_length; + u8 segment_name[64]; + transport_endpoint_t lcl; +} __clib_packed session_connected_msg_t; + +typedef struct session_disconnect_msg_ +{ + u32 client_index; + u32 context; + session_handle_t handle; +} __clib_packed session_disconnect_msg_t; + +typedef struct session_disconnected_msg_ +{ + u32 client_index; + u32 context; + u64 handle; +} __clib_packed session_disconnected_msg_t; + +typedef struct session_disconnected_reply_msg_ +{ + u32 context; + i32 retval; + u64 handle; +} __clib_packed session_disconnected_reply_msg_t; + +typedef struct session_reset_msg_ +{ + u32 client_index; + u32 context; + u64 handle; +} __clib_packed session_reset_msg_t; + +typedef struct session_reset_reply_msg_ +{ + u32 context; + i32 retval; + u64 handle; +} __clib_packed session_reset_reply_msg_t; + +typedef struct session_req_worker_update_msg_ +{ + u64 session_handle; +} __clib_packed session_req_worker_update_msg_t; + +/* NOTE: using u16 for wrk indices because message needs to fit in 18B */ +typedef struct session_worker_update_msg_ +{ + u32 client_index; + u16 wrk_index; + u16 req_wrk_index; + u64 handle; +} __clib_packed session_worker_update_msg_t; + +typedef struct session_worker_update_reply_msg_ +{ + u64 handle; + uword rx_fifo; + uword tx_fifo; + u64 segment_handle; +} __clib_packed session_worker_update_reply_msg_t; + +typedef struct session_app_detach_msg_ +{ + u32 client_index; + u32 context; +} session_app_detach_msg_t; + +typedef struct app_map_another_segment_msg_ +{ + u32 client_index; + u32 context; + u8 fd_flags; + u32 segment_size; + u8 segment_name[128]; + u64 segment_handle; +} session_app_add_segment_msg_t; + +typedef struct app_unmap_segment_msg_ +{ + u32 client_index; + u32 context; + u64 segment_handle; +} session_app_del_segment_msg_t; + +typedef struct session_migrate_msg_ +{ + uword vpp_evt_q; + session_handle_t handle; + session_handle_t new_handle; + u32 vpp_thread_index; +} __clib_packed session_migrated_msg_t; + +typedef struct session_cleanup_msg_ +{ + session_handle_t handle; +} __clib_packed session_cleanup_msg_t; + +typedef struct app_session_event_ +{ + svm_msg_q_msg_t msg; + session_event_t *evt; +} __clib_packed app_session_evt_t; + +static inline void +app_alloc_ctrl_evt_to_vpp (svm_msg_q_t * mq, app_session_evt_t * app_evt, + u8 evt_type) +{ + svm_msg_q_lock_and_alloc_msg_w_ring (mq, + SESSION_MQ_CTRL_EVT_RING, + SVM_Q_WAIT, &app_evt->msg); + app_evt->evt = svm_msg_q_msg_data (mq, &app_evt->msg); + clib_memset (app_evt->evt, 0, sizeof (*app_evt->evt)); + app_evt->evt->event_type = evt_type; +} + +static inline void +app_send_ctrl_evt_to_vpp (svm_msg_q_t * mq, app_session_evt_t * app_evt) +{ + svm_msg_q_add_and_unlock (mq, &app_evt->msg); +} + /** * Send fifo io event to vpp worker thread * @@ -210,10 +560,10 @@ typedef struct * @return 0 if success, negative integer otherwise */ static inline int -app_send_io_evt_to_vpp (svm_msg_q_t * mq, svm_fifo_t * f, u8 evt_type, +app_send_io_evt_to_vpp (svm_msg_q_t * mq, u32 session_index, u8 evt_type, u8 noblock) { - session_fifo_event_t *evt; + session_event_t *evt; svm_msg_q_msg_t msg; if (noblock) @@ -226,47 +576,37 @@ app_send_io_evt_to_vpp (svm_msg_q_t * mq, svm_fifo_t * f, u8 evt_type, return -2; } msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); - if (PREDICT_FALSE (svm_msg_q_msg_is_invalid (&msg))) - { - svm_msg_q_unlock (mq); - return -2; - } - evt = (session_fifo_event_t *) svm_msg_q_msg_data (mq, &msg); - evt->fifo = f; + evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg); + evt->session_index = session_index; evt->event_type = evt_type; - svm_msg_q_add_w_lock (mq, &msg); - svm_msg_q_unlock (mq); + svm_msg_q_add_and_unlock (mq, &msg); return 0; } else { svm_msg_q_lock (mq); + while (svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING) + || svm_msg_q_is_full (mq)) + svm_msg_q_wait (mq); msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); - while (svm_msg_q_msg_is_invalid (&msg)) - { - svm_msg_q_wait (mq); - msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); - } - evt = (session_fifo_event_t *) svm_msg_q_msg_data (mq, &msg); - evt->fifo = f; + evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg); + evt->session_index = session_index; evt->event_type = evt_type; - if (svm_msg_q_is_full (mq)) - svm_msg_q_wait (mq); - svm_msg_q_add_w_lock (mq, &msg); - svm_msg_q_unlock (mq); + svm_msg_q_add_and_unlock (mq, &msg); return 0; } } always_inline int app_send_dgram_raw (svm_fifo_t * f, app_session_transport_t * at, - svm_msg_q_t * vpp_evt_q, u8 * data, u32 len, u8 noblock) + svm_msg_q_t * vpp_evt_q, u8 * data, u32 len, u8 evt_type, + u8 do_evt, u8 noblock) { u32 max_enqueue, actual_write; session_dgram_hdr_t hdr; int rv; - max_enqueue = svm_fifo_max_enqueue (f); + max_enqueue = svm_fifo_max_enqueue_prod (f); if (max_enqueue <= sizeof (session_dgram_hdr_t)) return 0; @@ -274,18 +614,20 @@ app_send_dgram_raw (svm_fifo_t * f, app_session_transport_t * at, actual_write = clib_min (len, max_enqueue); hdr.data_length = actual_write; hdr.data_offset = 0; - clib_memcpy (&hdr.rmt_ip, &at->rmt_ip, sizeof (ip46_address_t)); + clib_memcpy_fast (&hdr.rmt_ip, &at->rmt_ip, sizeof (ip46_address_t)); hdr.is_ip4 = at->is_ip4; hdr.rmt_port = at->rmt_port; - clib_memcpy (&hdr.lcl_ip, &at->lcl_ip, sizeof (ip46_address_t)); + clib_memcpy_fast (&hdr.lcl_ip, &at->lcl_ip, sizeof (ip46_address_t)); hdr.lcl_port = at->lcl_port; - rv = svm_fifo_enqueue_nowait (f, sizeof (hdr), (u8 *) & hdr); + rv = svm_fifo_enqueue (f, sizeof (hdr), (u8 *) & hdr); ASSERT (rv == sizeof (hdr)); - if ((rv = svm_fifo_enqueue_nowait (f, actual_write, data)) > 0) + rv = svm_fifo_enqueue (f, actual_write, data); + if (do_evt) { - if (svm_fifo_set_event (f)) - app_send_io_evt_to_vpp (vpp_evt_q, f, FIFO_EVENT_APP_TX, noblock); + if (rv > 0 && svm_fifo_set_event (f)) + app_send_io_evt_to_vpp (vpp_evt_q, f->master_session_index, evt_type, + noblock); } ASSERT (rv); return rv; @@ -295,19 +637,22 @@ always_inline int app_send_dgram (app_session_t * s, u8 * data, u32 len, u8 noblock) { return app_send_dgram_raw (s->tx_fifo, &s->transport, s->vpp_evt_q, data, - len, noblock); + len, SESSION_IO_EVT_TX, 1 /* do_evt */ , + noblock); } always_inline int app_send_stream_raw (svm_fifo_t * f, svm_msg_q_t * vpp_evt_q, u8 * data, - u32 len, u8 noblock) + u32 len, u8 evt_type, u8 do_evt, u8 noblock) { int rv; - if ((rv = svm_fifo_enqueue_nowait (f, len, data)) > 0) + rv = svm_fifo_enqueue (f, len, data); + if (do_evt) { - if (svm_fifo_set_event (f)) - app_send_io_evt_to_vpp (vpp_evt_q, f, FIFO_EVENT_APP_TX, noblock); + if (rv > 0 && svm_fifo_set_event (f)) + app_send_io_evt_to_vpp (vpp_evt_q, f->master_session_index, evt_type, + noblock); } return rv; } @@ -315,7 +660,8 @@ app_send_stream_raw (svm_fifo_t * f, svm_msg_q_t * vpp_evt_q, u8 * data, always_inline int app_send_stream (app_session_t * s, u8 * data, u32 len, u8 noblock) { - return app_send_stream_raw (s->tx_fifo, s->vpp_evt_q, data, len, noblock); + return app_send_stream_raw (s->tx_fifo, s->vpp_evt_q, data, len, + SESSION_IO_EVT_TX, 1 /* do_evt */ , noblock); } always_inline int @@ -328,17 +674,22 @@ app_send (app_session_t * s, u8 * data, u32 len, u8 noblock) always_inline int app_recv_dgram_raw (svm_fifo_t * f, u8 * buf, u32 len, - app_session_transport_t * at, u8 clear_evt) + app_session_transport_t * at, u8 clear_evt, u8 peek) { session_dgram_pre_hdr_t ph; u32 max_deq; int rv; + max_deq = svm_fifo_max_dequeue_cons (f); + if (max_deq < sizeof (session_dgram_hdr_t)) + { + if (clear_evt) + svm_fifo_unset_event (f); + return 0; + } + if (clear_evt) svm_fifo_unset_event (f); - max_deq = svm_fifo_max_dequeue (f); - if (max_deq < sizeof (session_dgram_hdr_t)) - return 0; svm_fifo_peek (f, 0, sizeof (ph), (u8 *) & ph); ASSERT (ph.data_length >= ph.data_offset); @@ -346,6 +697,8 @@ app_recv_dgram_raw (svm_fifo_t * f, u8 * buf, u32 len, svm_fifo_peek (f, sizeof (ph), sizeof (*at), (u8 *) at); len = clib_min (len, ph.data_length - ph.data_offset); rv = svm_fifo_peek (f, ph.data_offset + SESSION_CONN_HDR_LEN, len, buf); + if (peek) + return rv; ph.data_offset += rv; if (ph.data_offset == ph.data_length) svm_fifo_dequeue_drop (f, ph.data_length + SESSION_CONN_HDR_LEN); @@ -357,21 +710,25 @@ app_recv_dgram_raw (svm_fifo_t * f, u8 * buf, u32 len, always_inline int app_recv_dgram (app_session_t * s, u8 * buf, u32 len) { - return app_recv_dgram_raw (s->rx_fifo, buf, len, &s->transport, 1); + return app_recv_dgram_raw (s->rx_fifo, buf, len, &s->transport, 1, 0); } always_inline int -app_recv_stream_raw (svm_fifo_t * f, u8 * buf, u32 len, u8 clear_evt) +app_recv_stream_raw (svm_fifo_t * f, u8 * buf, u32 len, u8 clear_evt, u8 peek) { if (clear_evt) svm_fifo_unset_event (f); - return svm_fifo_dequeue_nowait (f, len, buf); + + if (peek) + return svm_fifo_peek (f, 0, len, buf); + + return svm_fifo_dequeue (f, len, buf); } always_inline int app_recv_stream (app_session_t * s, u8 * buf, u32 len) { - return app_recv_stream_raw (s->rx_fifo, buf, len, 1); + return app_recv_stream_raw (s->rx_fifo, buf, len, 1, 0); } always_inline int