308 lines
6.9 KiB
C
308 lines
6.9 KiB
C
/*
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This file is part of libcapwap.
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libcapwap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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libcapwap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file
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* @brief Connection object stuff
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*/
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#ifndef __CONN_H
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#define __CONN_H
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#include <stdint.h>
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#include <semaphore.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include "fragman.h"
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#include "cwmsg.h"
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#include "action.h"
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#include "mbag.h"
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#include "intavltree.h"
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#include "mbag.h"
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#include "mod.h"
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struct cw_action_in;
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#define CONN_MAX_MSG_LENGTH 65536
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#include "netconn.h"
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#include "connlist.h"
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/**
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* Connection Object
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*/
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struct conn {
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int sock;
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struct sockaddr_storage addr;
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struct connlist * connlist;
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int data_sock;
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struct sockaddr_storage data_addr;
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struct netconn * data_nc;
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int recv_timeout;
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mbag_t outgoing;
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mbag_t incomming;
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mbag_t remote;
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mbag_t local;
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mbag_t radios;
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mbag_t radios_upd;
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mbag_t config;
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mbag_t config_upd;
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uint8_t session_id[16];
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int receiver;
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/** base_mac */
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bstr_t base_rmac;
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/** Wireless Binding ID of this connection */
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uint8_t wbid;
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/** Counter for mandatory message elements */
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struct avltree *mand;
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/** Actionsdefs - this defines the possible actions for
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this conn object, so in the end this is the specification
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of the protocoll */
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struct cw_MsgSet * msgset;
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/** Current CAPWAP state */
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uint8_t capwap_state;
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/** The framgent manager used on this connection */
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frag_t *fragman;
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/** Current Fragment ID */
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int fragid;
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int seqnum;
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int last_seqnum_received;
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int last_message_id_received;
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struct cwmsg req_msg;
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struct cwmsg resp_msg;
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/** Buffer for outgoing request messages */
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uint8_t req_buffer[CONN_MAX_MSG_LENGTH];
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/** Buffer for outgoing response messages */
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uint8_t resp_buffer[CONN_MAX_MSG_LENGTH];
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/** Max mtu, could be changed during discovery */
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int mtu;
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/* 0 mtu discovery turned off, 1 discovery tuned on */
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int mtu_discovery;
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/* receive and send methods */
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int (*recv_packet) (struct conn *, uint8_t *, int);
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int (*recv_packet_peek) (struct conn *, uint8_t *, int);
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int (*send_packet) (struct conn *, const uint8_t *, int);
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/*
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// int (*recv_data_packet) (struct conn *, uint8_t *,int);
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// int (*send_data_packet) (struct conn *, const uint8_t *, int);
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*/
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int (*readfrom) (struct conn *, uint8_t *, int, struct sockaddr_storage *);
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int (*read) (struct conn *, uint8_t *, int);
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int (*write) (struct conn *, const uint8_t *, int);
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/*
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// int (*write_data) (struct conn *, const uint8_t *, int);
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*/
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/* optional packet queue */
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uint8_t **q;
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int qsize;
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int qrpos;
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int qwpos;
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sem_t q_sem;
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uint8_t *cur_packet;
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int cur_packet_len;
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int cur_packet_pos;
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/* dtls stuff */
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int (*dtls_start) (struct conn *);
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int (*dtls_accept) (struct conn *);
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char *dtls_psk;
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int dtls_psk_len;
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char *dtls_cert_file;
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char *dtls_key_file;
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char *dtls_key_pass;
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void *dtls_data;
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char *dtls_cipher;
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int dtls_error;
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uint8_t dtls_cookie[8];
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int dtls_verify_peer;
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int dtls_mtu;
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uint8_t dtls_buffer[2048];
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int dtls_buffer_len;
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int dtls_buffer_pos;
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/* capwap timers */
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int retransmit_interval;
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int max_retransmit;
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int wait_dtls;
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int wait_join;
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/* used to link the conn obj with other objects */
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void *data;
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/** Mode */
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int capwap_mode;
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/** CAWAP mode for outgoing messages */
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int capwap_mode_out;
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int strict_capwap;
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int strict_hdr;
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int (*process_packet)(struct conn *conn, uint8_t * packet, int len,struct sockaddr *from);
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int (*process_message)(struct conn *conn, uint8_t * rawmsg, int rawlen,
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struct sockaddr *from);
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int detected;
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void * mods;
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int (*msg_start)(struct conn *conn,struct cw_action_in *a,uint8_t*data,int len,struct sockaddr *from);
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int (*msg_end)(struct conn *conn,struct cw_action_in *a,uint8_t*elem,int len,struct sockaddr *from);
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int (*elem_end)(struct conn *conn,struct cw_action_in *a,int afrc,uint8_t*elem,int len,struct sockaddr *from);
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/*
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// void (*actions_registered)(struct conn *conn);
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*/
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};
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#define conn_is_strict_capwap(conn) (conn->strict_capwap)
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struct conn *conn_create(int sock, struct sockaddr *addr, int qsize);
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struct conn *conn_create_noq(int sock, struct sockaddr *addr);
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extern int conn_send_cwmsg(struct conn *conn, struct cwmsg *cwmsg);
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/*
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//extern int conn_process_packet(struct conn *conn, uint8_t * packet, int len,
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// int (*cb) (void *, uint8_t *,int len), void *cbarg);
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*/
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extern int conn_process_packet(struct conn *conn, uint8_t * packet, int len,struct sockaddr *from);
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extern int process_message(struct conn *conn, uint8_t * rawmsg, int rawlen,
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struct sockaddr *from);
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extern uint8_t *conn_get_message(struct conn *conn);
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extern int conn_send_packet(struct conn *conn, const uint8_t * buffer, int len);
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extern int conn_send_data_packet(struct conn * conn, const uint8_t * buffer, int len);
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extern void conn_destroy(struct conn *conn);
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uint8_t *conn_q_get_packet(struct conn *conn);
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extern int conn_q_recv_packet(struct conn *conn, uint8_t * buffer, int len);
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extern int conn_q_recv_packet_peek(struct conn *conn, uint8_t * buffer, int len);
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extern int conn_recv_packet(struct conn *conn, uint8_t * buf, int len);
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extern int conn_recv_packet_peek(struct conn *conn, uint8_t * buf, int len);
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extern int conn_send_response(struct conn *conn, struct cwmsg *cwmsg, int seqnum);
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extern struct cwrmsg *conn_get_response(struct conn *conn);
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#define conn_get_next_seqnum(conn) (conn->seqnum=((conn->seqnum+1)&0xff))
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#define conn_get_last_seqnum(conn) (conn->seqnum&0xff)
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void conn_q_add_packet(struct conn *conn, uint8_t * packet, int len);
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struct image_identifier;
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struct cwimage_data;
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extern void conn_prepare_request(struct conn *conn, int type);
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extern int conn_prepare_image_data_request(struct conn *conn, struct cwimage_data *,
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struct image_identifier *id);
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/*
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//extern void conn_detect_capwap(struct conn *conn, struct wtpinfo *wtpinfo);
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*/
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struct cwrmsg *conn_send_request(struct conn *conn);
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struct cwrmsg *conn_wait_for_message(struct conn *conn, time_t timer);
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struct cwrmsg *conn_wait_for_request(struct conn *conn, int *msglist, time_t timer);
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#define conn_is_error(conn) (conn->dtls_error)
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void conn_init(struct conn *conn);
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extern int cw_read_messages(struct conn *conn);
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extern int conn_recvfrom_packet(struct conn *conn, uint8_t * buf, int len,
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struct sockaddr_storage *from);
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int conn_send_msg(struct conn * conn, uint8_t *rawmsg);
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int cw_read_from(struct conn * conn);
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void conn_clear_upd(struct conn *conn, int merge);
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#endif /* __CONN_H */
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