SIP概念区别 Session Dialog Transaction

深入解析优快云文章:关键内容与技术要点
本文详细解读了优快云上一篇关于编程技术的文章,涵盖了前端开发、后端开发、移动开发等多个领域的核心内容,提供了丰富的实践经验和理论知识,帮助开发者深入理解并掌握关键技术点。
#ifndef _SIP_PROTOCOL_H #define _SIP_PROTOCOL_H #include "common/sip_common.h" #ifdef SIP_USE_TCP #define SIP_TRANSPORT "TCP" #else #define SIP_TRANSPORT "UDP" #endif /* 字符数组长度宏定义 */ #define SIP_URI_SCHEME_LEN 8 #define SIP_URI_USER_LEN 32 #define SIP_URI_HOST_LEN 32 #define SIP_URI_PARAM_LEN 32 #define SIP_VIA_PROTOCOL_LEN 16 #define SIP_VIA_TRANSPORT_LEN 8 #define SIP_VIA_HOST_LEN 64 #define SIP_VIA_BRANCH_LEN 32 #define SIP_VIA_RECEIVED_LEN 32 #define AUTH_REALM_LEN 64 #define AUTH_NONCE_LEN 64 #define AUTH_ALGORITHM_LEN 32 #define AUTH_QOP_LEN 32 #define AUTH_OPAQUE_LEN 64 #define AUTH_RESPONSE_LEN 33 #define SIP_HEADER_CALLID_LEN 64 #define SIP_HEADER_CONTENT_TYPE_LEN 64 #define SIP_HEADER_CONTACT_LEN 64 #define SIP_HEADER_USER_AGENT_LEN 64 #define SIP_BODY_TYPE_LEN 32 #define SIP_REASON_PHRASE_LEN 32 #define SIP_CONFIG_USER_AGENT_LEN 32 #define SIP_BRANCH_LEN 32 #define SIP_TAG_LEN 32 #define SIP_CALLID_LEN 64 #define T1_TIMEOUT 500 #define T2_TIMEOUT 64 * T1_TIMEOUT #define T4_TIMEOUT 5000 /* SIP方法定义 */ typedef enum sip_method { SIP_METHOD_INVITE = 0, SIP_METHOD_ACK, SIP_METHOD_BYE, SIP_METHOD_CANCEL, SIP_METHOD_REGISTER, SIP_METHOD_OPTIONS, SIP_METHOD_MAX } sip_method; /* SIP响应状态码 */ /* SIP响应状态码枚举 (RFC 3261及相关扩展) */ typedef enum sip_status_code { /* 1xx 临时响应 */ SIP_100_TRYING = 100, SIP_180_RINGING = 180, SIP_181_CALL_IS_BEING_FORWARDED = 181, SIP_182_QUEUED = 182, SIP_183_SESSION_PROGRESS = 183, /* 2xx 成功响应 */ SIP_200_OK = 200, SIP_202_ACCEPTED = 202, // RFC3265 /* 3xx 重定向响应 */ SIP_300_MULTIPLE_CHOICES = 300, SIP_301_MOVED_PERMANENTLY = 301, SIP_302_MOVED_TEMPORARILY = 302, SIP_305_USE_PROXY = 305, SIP_380_ALTERNATIVE_SERVICE = 380, /* 4xx 客户端错误 */ SIP_400_BAD_REQUEST = 400, SIP_401_UNAUTHORIZED = 401, SIP_402_PAYMENT_REQUIRED = 402, SIP_403_FORBIDDEN = 403, SIP_404_NOT_FOUND = 404, SIP_405_METHOD_NOT_ALLOWED = 405, SIP_406_NOT_ACCEPTABLE = 406, SIP_407_PROXY_AUTHENTICATION_REQUIRED = 407, SIP_408_REQUEST_TIMEOUT = 408, SIP_410_GONE = 410, SIP_413_REQUEST_ENTITY_TOO_LARGE = 413, SIP_414_REQUEST_URI_TOO_LONG = 414, SIP_415_UNSUPPORTED_MEDIA_TYPE = 415, SIP_416_UNSUPPORTED_URI_SCHEME = 416, SIP_420_BAD_EXTENSION = 420, SIP_421_EXTENSION_REQUIRED = 421, SIP_423_INTERVAL_TOO_BRIEF = 423, SIP_480_TEMPORARILY_UNAVAILABLE = 480, SIP_481_CALL_TRANSACTION_DOES_NOT_EXIST = 481, SIP_482_LOOP_DETECTED = 482, SIP_483_TOO_MANY_HOPS = 483, SIP_484_ADDRESS_INCOMPLETE = 484, SIP_485_AMBIGUOUS = 485, SIP_486_BUSY_HERE = 486, SIP_487_REQUEST_TERMINATED = 487, SIP_488_NOT_ACCEPTABLE_HERE = 488, SIP_489_BAD_EVENT = 489, // RFC3265 SIP_491_REQUEST_PENDING = 491, SIP_493_UNDECIPHERABLE = 493, /* 5xx 服务器错误 */ SIP_500_SERVER_INTERNAL_ERROR = 500, SIP_501_NOT_IMPLEMENTED = 501, SIP_502_BAD_GATEWAY = 502, SIP_503_SERVICE_UNAVAILABLE = 503, SIP_504_SERVER_TIME_OUT = 504, SIP_505_VERSION_NOT_SUPPORTED = 505, SIP_513_MESSAGE_TOO_LARGE = 513, /* 6xx 全局错误 */ SIP_600_BUSY_EVERYWHERE = 600, SIP_603_DECLINE = 603, SIP_604_DOES_NOT_EXIST_ANYWHERE = 604, SIP_606_NOT_ACCEPTABLE = 606 } sip_status_code; /* SIP事务状态定义 */ typedef enum sip_transaction_state { Calling = 0, Trying, Proceeding, Completed, Terminated } sip_transaction_state; /* SIP URI结构 */ typedef struct sip_uri { char scheme[SIP_URI_SCHEME_LEN]; /* "sip" or "sips" */ char user[SIP_URI_USER_LEN]; /* username */ char host[SIP_URI_HOST_LEN]; /* domain or IP */ U16 port; /* port number */ char parameters[SIP_URI_PARAM_LEN]; /* URI parameters */ } sip_uri; /* SIP Via头结构 */ typedef struct sip_via { char protocol[SIP_VIA_PROTOCOL_LEN]; /* "SIP/2.0" */ char transport[SIP_VIA_TRANSPORT_LEN]; /* "UDP", "TCP" */ char host[SIP_VIA_HOST_LEN]; /* sent-by host */ U16 port; /* sent-by port */ char branch[SIP_VIA_BRANCH_LEN]; /* branch parameter */ char received[SIP_VIA_RECEIVED_LEN]; /* received parameter */ U16 rport; /* rport parameter */ } sip_via; /* 认证信息结构体 */ typedef struct auth_info_t { char realm[AUTH_REALM_LEN]; char nonce[AUTH_NONCE_LEN]; char algorithm[AUTH_ALGORITHM_LEN]; char qop[AUTH_QOP_LEN]; char opaque[AUTH_OPAQUE_LEN]; int stale; char response[AUTH_RESPONSE_LEN]; } auth_info_t; /* SIP消息头结构 */ typedef struct sip_headers { sip_uri from; /* From header */ sip_uri to; /* To header */ sip_via via; /* Via header */ char call_id[SIP_HEADER_CALLID_LEN]; /* Call-ID header */ U32 cseq; /* CSeq number */ enum sip_method cseq_method; /* CSeq method */ U8 max_forwards; /* Max-Forwards header */ char content_type[SIP_HEADER_CONTENT_TYPE_LEN]; /* Content-Type */ char contact[SIP_HEADER_CONTACT_LEN]; /* Contact header */ U32 content_length; /* Content-Length header */ U32 Expires; char user_agent[SIP_HEADER_USER_AGENT_LEN]; /* User-Agent */ auth_info_t auth; } sip_headers; /* SIP消息体结构 */ typedef struct sip_body { char *content; /* Message body content */ U32 length; /* Message body length */ char type[SIP_BODY_TYPE_LEN]; /* Content type */ } sip_body; /* SIP消息结构 */ typedef struct sip_message { U8 type; /* 0:request, 1:response */ enum sip_method method; /* Method (requests) */ U16 status_code; /* Status code (responses) */ char reason_phrase[SIP_REASON_PHRASE_LEN]; /* Reason phrase */ struct sip_uri request_uri; /* Request-URI */ struct sip_headers headers; /* SIP headers */ struct sip_body body; /* Message body */ struct sockaddr_in source; /* Message source */ struct list_head list; /* List head for queue */ } sip_message; /* SIP事务信息 */ typedef struct sip_transaction { char branch[SIP_BRANCH_LEN]; /* Transaction branch */ enum sip_method method; /* Transaction method */ U32 cseq; /* CSeq number */ int timeout_idx; struct sip_message *request; /* Original request */ struct sip_message *last_response; /* Last response */ sip_transaction_state state; } sip_transaction; /* 增强的对话状态 */ typedef enum dialog_state { DIALOG_EARLY, /* 早期对话(收到1xx) */ DIALOG_CONFIRMED /* 已确认对话(收到2xx) */ } dialog_state; /* SIP对话信息 */ typedef struct sip_dialog { char remote_tag[SIP_URI_PARAM_LEN]; /* From */ char local_tag[SIP_URI_PARAM_LEN]; /* To */ char call_id[SIP_HEADER_CALLID_LEN]; sip_uri remote_uri; sip_uri local_uri; } sip_dialog; /* 协议栈配置 */ typedef struct sip_protocol_config { char user_agent[SIP_CONFIG_USER_AGENT_LEN]; U8 max_forwards; U32 t1_timeout; /* T1 timer (RTT) */ U32 t2_timeout; /* T2 timer (64*T1) */ U32 t4_timeout; /* T4 timer (5000ms) */ } sip_protocol_config; /* SIP协议栈接口 */ /** * @brief SIP消息解析 * * @param[out] msg 解析出的sip消息 * * @param[in] data sip消息原始数据 * * @param[in] length 数据长度 * * @return 错误码 * */ int sip_message_parse(sip_message *msg, const char *data, U32 length); /** * @brief SIP消息解析 * * @param[in] msg sip消息结构体 * * @param[out] buffer 构造出的sip消息 * * @param[in] size 报文大小 * * @return 错误码 * */ int sip_message_build(sip_message *msg, char *buffer, U32 size); void sip_message_free(sip_message *msg); /** * @brief SIP消息拷贝 * * @param[in] src 源消息指针 * * @return sip消息指针 * */ sip_message *sip_message_copy(sip_message *src); int sip_uri_parse(sip_uri *uri, const char *uri_str); int sip_uri_build(sip_uri *uri, char *buffer, U32 size); /** * @brief 创建SIP事务 * * @param[ori_req] 源请求 * * @return SIP事务指针 * */ sip_transaction *sip_transaction_create(sip_message *ori_req, void *timeout_hanler); void sip_transaction_terminate(sip_transaction *trans); void sip_transaction_free(sip_transaction *trans); sip_dialog *sip_dialog_create(char *to_tag, char *from_tag, char *call_id); void sip_dialog_free(sip_dialog *dialog); const char *sip_method_to_string(enum sip_method method); sip_method sip_string_to_method(const char *method_str); const char *sip_status_to_reason(U16 status_code); void sip_generate_branch(char *branch, U32 size); void sip_generate_tag(char *tag, U32 size); void sip_generate_call_id(char *buf, int len); #endif /* _SIP_PROTOCOL_H */ #ifndef _SIP_CLIENT_H #define _SIP_CLIENT_H #include "common/sip_common.h" #include "sip_protocol.h" #include "media.h" #include "rtmp_sys.h" #include "sdp.h" #define MD5_APPEND(md5, buf, len) tpssl_Md5Update(md5, (uint8_t *)buf, (unsigned)len) #define REGISTER_INTERVAL 30 #define CALL_TIMEOUT 30 #define ESTABLISHED_TIMEOUT 120 #define TERMINATE_TIMEOUT 2 #define MAX_REGISTER_RETRY 10 #define TCP_RECONNECT_INTERVAL 10 /* 限制配置内容不超过对应最大长度 */ #define SIP_MAX_USERNAME 32 #define SIP_MAX_PASSWORD 32 #define SIP_MAX_ADDR_LEN 64 /* SIP客户端状态 */ typedef enum sip_client_state { SIP_STATE_IDLE = 0, SIP_STATE_INVITING, SIP_STATE_RINGING, SIP_STATE_ESTABLISHED, SIP_STATE_ERROR, SIP_STATE_MAX } sip_client_state; /* 客户端事件类型 */ typedef enum sip_event_type { /* 本地控制事件 */ EVENT_LOCAL_CALL = 0, // 发起呼叫 EVENT_LOCAL_ANSWER, // 接听呼叫 EVENT_LOCAL_HANGUP, // 挂断通话 EVENT_LOCAL_TIMEOUT, // 事务超时 /* 网络请求事件 */ EVENT_NET_INVITE, // 收到INVITE请求 EVENT_NET_ACK, // 收到ACK请求 EVENT_NET_BYE, // 收到BYE请求 EVENT_NET_CANCEL, // 收到CANCEL请求 /* 核心响应事件 */ EVENT_NET_1XX_PROVISIONAL, // 所有1xx临时响应 EVENT_NET_2XX_SUCCESS, // 200类成功响应 EVENT_NET_3XX_REDIRECTION, // 300类重定向响应 EVENT_NET_4XX_CLIENT_ERROR, // 400类客户端错误 EVENT_NET_5XX_SERVER_ERROR, // 500类服务器错误 /* 关键特殊事件 */ EVENT_NET_180_RINGING, // 180振铃提示 EVENT_NET_AUTH_CHALLENGE, // 认证挑战(401/407) /* 系统级事件 */ EVENT_ERROR, // 传输错误 EVENT_MAX // 事件类型总数 } sip_event_type; /* 回调函数类型 */ typedef int (*sip_callback_t)(sip_event_type event, void *sip_msg); /* 客户端配置 */ typedef struct sip_client_config_t { BOOL usetsl; char server_addr[SIP_MAX_ADDR_LEN]; char username[SIP_MAX_USERNAME]; char password[SIP_MAX_PASSWORD]; char local_addr[SIP_MAX_ADDR_LEN]; U16 server_port; } sip_client_config; // 200B /* SIP客户端结构 */ typedef struct SIPCLIENT_S { /* 当前事务 */ sip_dialog *current_dialog; sip_transaction *current_trans; sip_message cur_register; auth_info_t auth; enum sip_client_state state; sip_client_config config; int state_timeout_timer_idx; int registered_expired_timer_idx; int response_timeout_timer_idx; int register_timer_idx; int tcp_reconnect_timer_idx; /* 网络连接 */ int isock; S32 sip_socket; TPSIPSESSION *media_session; // 200B BOOL registered; BOOL connected; sdp_t *sdp_net; sdp_t *sdp_local; U32 call_count; char from_tag[32]; } SIPCLIENT; // 1,956 /* SIP客户端接口 */ /** * @brief SIP客户端初始化 * * @param[in] config 客户端配置 * * @return 错误码 * */ int sip_client_init(sip_client_config config); int sip_client_deinit(); /** * @brief SIP客户端拨号 * * @param[in] number 目标号码 * * @return 错误码 * * @note 只有在空闲状态下才能发出拨号,其余状态不做处理 */ int sip_client_make_call(const char *number); /** * @brief SIP客户端接听来电 * * @return 错误码 * * @note 只有在振铃状态下才会成功接听来电,其余状态不做处理 */ int sip_client_answer_call(); /** * @brief SIP客户端挂断电话 * * @return 错误码 * * @note 只有在非空闲状态下才能挂断电话,空闲状态不做处理 */ int sip_client_hangup_call(); /** * @brief 获取当前SIP客户端结构体指针 * * @return SIPCLIENT:SIP客户端结构体指针 * */ SIPCLIENT *get_sip_client(); /** * @brief 获取当前SIP客户端配置结构体指针 * * @return SIPCLIENT:SIP客户端配置结构体指针 * */ sip_client_config *get_sip_config_client(); void sip_client_set_idle_cb(sip_callback_t cb); void sip_client_set_inviting_cb(sip_callback_t cb); void sip_client_set_ringing_cb(sip_callback_t cb); void sip_client_set_established_cb(sip_callback_t cb); #endif /* _SIP_CLIENT_H */ 帮我想一下怎么修改设计来使这个sip客户端设计更加合理,能够同时支持多个对话
最新发布
11-15
#ifndef _SIP_PROTOCOL_H #define _SIP_PROTOCOL_H #include "common/sip_common.h" #ifdef SIP_USE_TCP #define SIP_TRANSPORT "TCP" #else #define SIP_TRANSPORT "UDP" #endif /* 字符数组长度宏定义 */ #define SIP_URI_SCHEME_LEN 8 #define SIP_URI_USER_LEN 32 #define SIP_URI_HOST_LEN 32 #define SIP_URI_PARAM_LEN 32 #define SIP_VIA_PROTOCOL_LEN 16 #define SIP_VIA_TRANSPORT_LEN 8 #define SIP_VIA_HOST_LEN 64 #define SIP_VIA_BRANCH_LEN 32 #define SIP_VIA_RECEIVED_LEN 32 #define AUTH_REALM_LEN 64 #define AUTH_NONCE_LEN 64 #define AUTH_ALGORITHM_LEN 32 #define AUTH_QOP_LEN 32 #define AUTH_OPAQUE_LEN 64 #define AUTH_RESPONSE_LEN 33 #define SIP_HEADER_CALLID_LEN 64 #define SIP_HEADER_CONTENT_TYPE_LEN 64 #define SIP_HEADER_CONTACT_LEN 64 #define SIP_HEADER_USER_AGENT_LEN 64 #define SIP_BODY_TYPE_LEN 32 #define SIP_REASON_PHRASE_LEN 32 #define SIP_CONFIG_USER_AGENT_LEN 32 #define SIP_BRANCH_LEN 32 #define SIP_TAG_LEN 32 #define SIP_CALLID_LEN 64 #define T1_TIMEOUT 500 #define T2_TIMEOUT 64 * T1_TIMEOUT #define T4_TIMEOUT 5000 /* SIP方法定义 */ typedef enum sip_method { SIP_METHOD_INVITE = 0, SIP_METHOD_ACK, SIP_METHOD_BYE, SIP_METHOD_CANCEL, SIP_METHOD_REGISTER, SIP_METHOD_OPTIONS, SIP_METHOD_MAX } sip_method; /* SIP响应状态码 */ /* SIP响应状态码枚举 (RFC 3261及相关扩展) */ typedef enum sip_status_code { /* 1xx 临时响应 */ SIP_100_TRYING = 100, SIP_180_RINGING = 180, SIP_181_CALL_IS_BEING_FORWARDED = 181, SIP_182_QUEUED = 182, SIP_183_SESSION_PROGRESS = 183, /* 2xx 成功响应 */ SIP_200_OK = 200, SIP_202_ACCEPTED = 202, // RFC3265 /* 3xx 重定向响应 */ SIP_300_MULTIPLE_CHOICES = 300, SIP_301_MOVED_PERMANENTLY = 301, SIP_302_MOVED_TEMPORARILY = 302, SIP_305_USE_PROXY = 305, SIP_380_ALTERNATIVE_SERVICE = 380, /* 4xx 客户端错误 */ SIP_400_BAD_REQUEST = 400, SIP_401_UNAUTHORIZED = 401, SIP_402_PAYMENT_REQUIRED = 402, SIP_403_FORBIDDEN = 403, SIP_404_NOT_FOUND = 404, SIP_405_METHOD_NOT_ALLOWED = 405, SIP_406_NOT_ACCEPTABLE = 406, SIP_407_PROXY_AUTHENTICATION_REQUIRED = 407, SIP_408_REQUEST_TIMEOUT = 408, SIP_410_GONE = 410, SIP_413_REQUEST_ENTITY_TOO_LARGE = 413, SIP_414_REQUEST_URI_TOO_LONG = 414, SIP_415_UNSUPPORTED_MEDIA_TYPE = 415, SIP_416_UNSUPPORTED_URI_SCHEME = 416, SIP_420_BAD_EXTENSION = 420, SIP_421_EXTENSION_REQUIRED = 421, SIP_423_INTERVAL_TOO_BRIEF = 423, SIP_480_TEMPORARILY_UNAVAILABLE = 480, SIP_481_CALL_TRANSACTION_DOES_NOT_EXIST = 481, SIP_482_LOOP_DETECTED = 482, SIP_483_TOO_MANY_HOPS = 483, SIP_484_ADDRESS_INCOMPLETE = 484, SIP_485_AMBIGUOUS = 485, SIP_486_BUSY_HERE = 486, SIP_487_REQUEST_TERMINATED = 487, SIP_488_NOT_ACCEPTABLE_HERE = 488, SIP_489_BAD_EVENT = 489, // RFC3265 SIP_491_REQUEST_PENDING = 491, SIP_493_UNDECIPHERABLE = 493, /* 5xx 服务器错误 */ SIP_500_SERVER_INTERNAL_ERROR = 500, SIP_501_NOT_IMPLEMENTED = 501, SIP_502_BAD_GATEWAY = 502, SIP_503_SERVICE_UNAVAILABLE = 503, SIP_504_SERVER_TIME_OUT = 504, SIP_505_VERSION_NOT_SUPPORTED = 505, SIP_513_MESSAGE_TOO_LARGE = 513, /* 6xx 全局错误 */ SIP_600_BUSY_EVERYWHERE = 600, SIP_603_DECLINE = 603, SIP_604_DOES_NOT_EXIST_ANYWHERE = 604, SIP_606_NOT_ACCEPTABLE = 606 } sip_status_code; /* SIP事务状态定义 */ typedef enum sip_transaction_state { Calling = 0, Trying, Proceeding, Completed, Terminated } sip_transaction_state; /* SIP URI结构 */ typedef struct sip_uri { char scheme[SIP_URI_SCHEME_LEN]; /* "sip" or "sips" */ char user[SIP_URI_USER_LEN]; /* username */ char host[SIP_URI_HOST_LEN]; /* domain or IP */ U16 port; /* port number */ char parameters[SIP_URI_PARAM_LEN]; /* URI parameters */ } sip_uri; /* SIP Via头结构 */ typedef struct sip_via { char protocol[SIP_VIA_PROTOCOL_LEN]; /* "SIP/2.0" */ char transport[SIP_VIA_TRANSPORT_LEN]; /* "UDP", "TCP" */ char host[SIP_VIA_HOST_LEN]; /* sent-by host */ U16 port; /* sent-by port */ char branch[SIP_VIA_BRANCH_LEN]; /* branch parameter */ char received[SIP_VIA_RECEIVED_LEN]; /* received parameter */ U16 rport; /* rport parameter */ } sip_via; /* 认证信息结构体 */ typedef struct auth_info_t { char realm[AUTH_REALM_LEN]; char nonce[AUTH_NONCE_LEN]; char algorithm[AUTH_ALGORITHM_LEN]; char qop[AUTH_QOP_LEN]; char opaque[AUTH_OPAQUE_LEN]; int stale; char response[AUTH_RESPONSE_LEN]; } auth_info_t; /* SIP消息头结构 */ typedef struct sip_headers { struct sip_uri from; /* From header */ struct sip_uri to; /* To header */ struct sip_via via; /* Via header */ char call_id[SIP_HEADER_CALLID_LEN]; /* Call-ID header */ U32 cseq; /* CSeq number */ enum sip_method cseq_method; /* CSeq method */ U8 max_forwards; /* Max-Forwards header */ char content_type[SIP_HEADER_CONTENT_TYPE_LEN]; /* Content-Type */ char contact[SIP_HEADER_CONTACT_LEN]; /* Contact header */ U32 content_length; /* Content-Length header */ U32 Expires; char user_agent[SIP_HEADER_USER_AGENT_LEN]; /* User-Agent */ auth_info_t auth; } sip_headers; /* SIP消息体结构 */ typedef struct sip_body { char *content; /* Message body content */ U32 length; /* Message body length */ char type[SIP_BODY_TYPE_LEN]; /* Content type */ } sip_body; /* SIP消息结构 */ typedef struct sip_message { U8 type; /* 0:request, 1:response */ enum sip_method method; /* Method (requests) */ U16 status_code; /* Status code (responses) */ char reason_phrase[SIP_REASON_PHRASE_LEN]; /* Reason phrase */ struct sip_uri request_uri; /* Request-URI */ struct sip_headers headers; /* SIP headers */ struct sip_body body; /* Message body */ struct sockaddr_in source; /* Message source */ struct list_head list; /* List head for queue */ } sip_message; /* SIP事务信息 */ typedef struct sip_transaction { char branch[SIP_BRANCH_LEN]; /* Transaction branch */ enum sip_method method; /* Transaction method */ int timeout_idx; struct sip_message *request; /* Original request */ struct sip_message *last_response; /* Last response */ sip_transaction_state state; /*0:off, 1:on*/ } sip_transaction; /* SIP对话信息 */ typedef struct sip_dialog { char remote_tag[SIP_URI_PARAM_LEN]; /* From */ char local_tag[SIP_URI_PARAM_LEN]; /* To */ char call_id[SIP_HEADER_CALLID_LEN]; } sip_dialog; /* 协议栈配置 */ typedef struct sip_protocol_config { char user_agent[SIP_CONFIG_USER_AGENT_LEN]; U8 max_forwards; U32 t1_timeout; /* T1 timer (RTT) */ U32 t2_timeout; /* T2 timer (64*T1) */ U32 t4_timeout; /* T4 timer (5000ms) */ } sip_protocol_config; /* SIP协议栈接口 */ /** * @brief SIP消息解析 * * @param[out] msg 解析出的sip消息 * * @param[in] data sip消息原始数据 * * @param[in] length 数据长度 * * @return 错误码 * */ int sip_message_parse(sip_message *msg, const char *data, U32 length); /** * @brief SIP消息解析 * * @param[in] msg sip消息结构体 * * @param[out] buffer 构造出的sip消息 * * @param[in] size 报文大小 * * @return 错误码 * */ int sip_message_build(sip_message *msg, char *buffer, U32 size); void sip_message_free(sip_message *msg); /** * @brief SIP消息拷贝 * * @param[in] src 源消息指针 * * @return sip消息指针 * */ sip_message *sip_message_copy(sip_message *src); int sip_uri_parse(sip_uri *uri, const char *uri_str); int sip_uri_build(sip_uri *uri, char *buffer, U32 size); /** * @brief 创建SIP事务 * * @param[ori_req] 源请求 * * @return SIP事务指针 * */ sip_transaction *sip_transaction_create(sip_message *ori_req, void *timeout_hanler); void sip_transaction_terminate(sip_transaction *trans); void sip_transaction_free(sip_transaction *trans); sip_dialog *sip_dialog_create(char *to_tag, char *from_tag, char *call_id); void sip_dialog_free(sip_dialog *dialog); const char *sip_method_to_string(enum sip_method method); sip_method sip_string_to_method(const char *method_str); const char *sip_status_to_reason(U16 status_code); void sip_generate_branch(char *branch, U32 size); void sip_generate_tag(char *tag, U32 size); void sip_generate_call_id(char *buf, int len); #endif /* _SIP_PROTOCOL_H */ 帮我改进一下对话和事务的结构体,使逻辑更合理
11-14
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