1 // vim: ts=4 sw=4 noet :
3 ==================================================================================
4 Copyright (c) 2019 Nokia
5 Copyright (c) 2018-2019 AT&T Intellectual Property.
7 Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
11 http://www.apache.org/licenses/LICENSE-2.0
13 Unless required by applicable law or agreed to in writing, software
14 distributed under the License is distributed on an "AS IS" BASIS,
15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
17 limitations under the License.
18 ==================================================================================
22 Mnemonic: uta_nng_private.h
23 Abstract: Private header information for the uta nng library functions.
24 These are structs which have specific NNG types; anything that
25 does not can be included in the common/rmr_agnostic.h header.
27 Author: E. Scott Daniels
28 Date: 31 November 2018
30 Mods: 28 Feb 2019 -- moved the majority to the agnostic header.
33 #ifndef _uta_private_h
34 #define _uta_private_h
37 Manages an endpoint. Type def for this is defined in agnostic.
40 char* name; // end point name (symtab reference)
41 char* proto; // connection proto (should only be TCP, but future might bring others)
42 char* addr; // address used for connection
43 nng_socket nn_sock; // the nano-msg socket to write to for this entry
44 nng_dialer dialer; // the connection specific information (retry timout etc)
45 int open; // set to true if we've connected as socket cannot be checked directly)
46 pthread_mutex_t gate; // we must serialise when we open/link to the endpoint
47 long long scounts[EPSC_SIZE]; // send counts (indexed by EPSCOUNT_* constants
51 Epoll information needed for the rmr_torcv_msg() funciton
53 typedef struct epoll_stuff {
54 struct epoll_event events[1]; // wait on 1 possible events
55 struct epoll_event epe; // event definition for event to listen to
56 int ep_fd; // file des from nng
57 int nng_fd; // fd from nng
61 Context describing our world. Should be returned to user programme on
62 call to initialise, and passed as first parm on all calls to other
65 The typedef is declared in the agnostic header.
68 char* my_name; // dns name of this host to set in sender field of a message
69 char* my_ip; // the ip address we _think_ we are using sent in src_ip of the message for rts
70 int shutdown; // thread notification if we need to tell them to stop
71 int max_mlen; // max message length payload+header
72 int max_plen; // max payload length
73 int flags; // CTXFL_ constants
74 int nrtele; // number of elements in the routing table
75 int send_retries; // number of retries send_msg() should attempt if eagain/timeout indicated by nng
76 int trace_data_len; // number of bytes to allocate in header for trace data
77 int d1_len; // extra header data 1 length
78 int d2_len; // extra header data 2 length (future)
79 nng_socket nn_sock; // our general listen socket
80 route_table_t* rtable; // the active route table
81 route_table_t* old_rtable; // the previously used rt, sits here to allow for draining
82 route_table_t* new_rtable; // route table under construction
83 if_addrs_t* ip_list; // list manager of the IP addresses that are on our known interfaces
84 void* mring; // ring where msgs are queued while waiting for a call response msg
87 char* rtg_addr; // addr/port of the route table generation publisher
88 int rtg_port; // the port that the rtg listens on
90 wh_mgt_t* wormholes; // management of user opened wormholes
91 epoll_stuff_t* eps; // epoll information needed for the rcv with timeout call
93 pthread_t rtc_th; // thread info for the rtc listener
94 pthread_t mtc_th; // thread info for the multi-thread call receive process
100 Static prototypes for functions located here. All common protos are in the
101 agnostic header file.
104 // --- initialisation and housekeeping -------
105 static void* init( char* uproto_port, int max_msg_size, int flags );
106 static void free_ctx( uta_ctx_t* ctx );
108 // --- rt table things ---------------------------
109 static int uta_link2( endpoint_t* ep );
110 static int rt_link2_ep( endpoint_t* ep );
111 static int uta_epsock_byname( route_table_t* rt, char* ep_name, nng_socket* nn_sock, endpoint_t** uepp );
112 static int uta_epsock_rr( rtable_ent_t* rte, int group, int* more, nng_socket* nn_sock, endpoint_t** uepp );
113 static rtable_ent_t* uta_get_rte( route_table_t *rt, int sid, int mtype, int try_alt );
114 static inline int xlate_nng_state( int state, int def_state );
117 // --- msg ---------------------------------------
118 static rmr_mbuf_t* alloc_zcmsg( uta_ctx_t* ctx, rmr_mbuf_t* msg, int size, int state, int trlo );
119 static rmr_mbuf_t* alloc_mbuf( uta_ctx_t* ctx, int state );
120 static void ref_tpbuf( rmr_mbuf_t* msg, size_t alen ) ;
121 static inline rmr_mbuf_t* clone_msg( rmr_mbuf_t* old_msg );
122 static rmr_mbuf_t* rcv_msg( uta_ctx_t* ctx, rmr_mbuf_t* old_msg );
123 static void* rcv_payload( uta_ctx_t* ctx, rmr_mbuf_t* old_msg );
124 static inline rmr_mbuf_t* realloc_msg( rmr_mbuf_t* old_msg, int tr_len );
125 static rmr_mbuf_t* send_msg( uta_ctx_t* ctx, rmr_mbuf_t* msg, nng_socket nn_sock, int retries );
126 static rmr_mbuf_t* send2ep( uta_ctx_t* ctx, endpoint_t* ep, rmr_mbuf_t* msg );
127 static rmr_mbuf_t* realloc_payload( rmr_mbuf_t* mbuf, int new_len, int copy, int clone );