/*
* Copyright (c) 2012-2017, 2020, 2022, 2024 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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*/
#ifndef __FLOW_DIVERT_H__
#define __FLOW_DIVERT_H__
#include <sys/mbuf.h>
#define FLOW_DIVERT_ORDER_LAST INT_MAX
struct flow_divert_group;
struct flow_divert_trie_node {
uint16_t start;
uint16_t length;
uint16_t child_map;
};
struct flow_divert_pcb {
decl_lck_mtx_data(, mtx);
socket_t so;
RB_ENTRY(flow_divert_pcb) rb_link;
uint32_t hash;
mbuf_t connect_token;
uint32_t flags;
uint32_t send_window;
struct flow_divert_group *group;
uint32_t control_group_unit;
uint32_t aggregate_unit;
uint32_t policy_control_unit;
int32_t ref_count;
uint64_t bytes_written_by_app;
uint64_t bytes_sent;
uint64_t bytes_received;
uint8_t log_level;
SLIST_ENTRY(flow_divert_pcb) tmp_list_entry;
mbuf_t connect_packet;
uint8_t *app_data __counted_by(app_data_length);
size_t app_data_length;
union sockaddr_in_4_6 local_endpoint;
struct sockaddr *original_remote_endpoint;
struct ifnet *original_last_outifp6;
struct ifnet *original_last_outifp;
uint8_t original_vflag;
};
RB_HEAD(fd_pcb_tree, flow_divert_pcb);
struct flow_divert_trie {
struct flow_divert_trie_node *nodes __counted_by(nodes_count);
uint16_t *child_maps __sized_by(child_maps_size);
uint8_t *bytes __counted_by(bytes_count);
void *memory __sized_by(memory_size);
uint16_t nodes_count;
uint16_t child_maps_count;
uint16_t bytes_count;
uint16_t nodes_free_next;
uint16_t child_maps_free_next;
uint16_t bytes_free_next;
uint16_t root;
size_t memory_size;
size_t child_maps_size;
};
struct flow_divert_group {
decl_lck_rw_data(, lck);
TAILQ_ENTRY(flow_divert_group) chain;
struct fd_pcb_tree pcb_tree;
uint32_t ctl_unit;
uint8_t atomic_bits;
MBUFQ_HEAD(send_queue_head) send_queue;
uint8_t *token_key __counted_by(token_key_size);
size_t token_key_size;
uint32_t flags;
struct flow_divert_trie signing_id_trie;
int32_t ref_count;
pid_t in_process_pid;
int32_t order;
};
void flow_divert_init(void);
void flow_divert_detach(struct socket *so);
errno_t flow_divert_token_set(struct socket *so, struct sockopt *sopt);
errno_t flow_divert_token_get(struct socket *so, struct sockopt *sopt);
errno_t flow_divert_pcb_init(struct socket *so);
errno_t flow_divert_connect_out(struct socket *so, struct sockaddr *to, proc_t p);
errno_t flow_divert_implicit_data_out(struct socket *so, int flags, mbuf_t data, struct sockaddr *to, mbuf_t control, struct proc *p);
#endif /* __FLOW_DIVERT_H__ */