1 // : vi ts=4 sw=4 noet :
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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.
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11 http://www.apache.org/licenses/LICENSE-2.0
13 Unless required by applicable law or agreed to in writing, software
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15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
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18 ==================================================================================
23 Abstract: General (public) header file for the uta message routing library
24 Author: E. Scott Daniels
25 Date: 27 November 2018
31 #include <sys/epoll.h> // broken on mac
38 #define RMR_MAX_XID 32 // space in header reserved for user xaction id
39 #define RMR_MAX_SID 32 // spece in header reserved for sender id
40 #define RMR_MAX_MEID 32 // spece in header reserved for managed element id
41 #define RMR_MAX_SRC 64 // max length of hostname (which could be IPv6 addr with [...]:port so more than the 39 bytes of a plain addr
42 #define RMR_MAX_RCV_BYTES 4096 // max bytes we support in a receive message
44 // various flags for function calls
45 #define RMRFL_NONE 0x00 // no flags
46 #define RMRFL_AUTO_ALLOC 0x01 // send auto allocates a zerocopy buffer
48 #define RMR_DEF_SIZE 0 // pass as size to have msg allocation use the default msg size
51 #define RMR_OK 0 // state is good
52 #define RMR_ERR_BADARG 1 // argument passd to function was unusable
53 #define RMR_ERR_NOENDPT 2 // send/call could not find an endpoint based on msg type
54 #define RMR_ERR_EMPTY 3 // msg received had no payload; attempt to send an empty message
55 #define RMR_ERR_NOHDR 4 // message didn't contain a valid header
56 #define RMR_ERR_SENDFAILED 5 // send failed; errno has nano reason
57 #define RMR_ERR_CALLFAILED 6 // unable to send call() message
58 #define RMR_ERR_NOWHOPEN 7 // no wormholes are open
59 #define RMR_ERR_WHID 8 // wormhole id was invalid
60 #define RMR_ERR_OVERFLOW 9 // operation would have busted through a buffer/field size
61 #define RMR_ERR_RETRY 10 // request (send/call/rts) failed, but caller should retry (EAGAIN for wrappers)
62 #define RMR_ERR_RCVFAILED 11 // receive failed (hard error)
63 #define RMR_ERR_TIMEOUT 12 // message processing call timed out
64 #define RMR_ERR_UNSET 13 // the message hasn't been populated with a transport buffer
65 #define RMR_ERR_TRUNC 14 // received message likely truncated
66 #define RMR_ERR_INITFAILED 15 // initialisation of something (probably message) failed
68 #define RMR_WH_CONNECTED(a) (a>=0) // for now whid is integer; it could be pointer at some future date
71 General message buffer. Passed to send and returned by receive.
73 (All fields are exposed such that if a wrapper needs to dup the storage as it passes
74 into or out of their environment they dup it all, not just what we choose to expose.)
77 int state; // state of processing
78 int mtype; // message type
79 int len; // length of data in the payload (send or received)
80 unsigned char* payload; // transported data
81 unsigned char* xaction; // pointer to fixed length transaction id bytes
83 // these things are off limits to the user application
84 void* tp_buf; // underlying transport allocated pointer (e.g. nng message)
85 void* header; // internal message header (whole buffer: header+payload)
86 unsigned char* id; // if we need an ID in the message separate from the xaction id
87 int flags; // various MFL_ (private) flags as needed
88 int alloc_len; // the length of the allocated space (hdr+payload)
92 typedef int rmr_whid_t; // wormhole identifier returned by rmr_wh_open(), passed to rmr_wh_send_msg()
95 // ---- library message specific prototypes ------------------------------------------------------------
96 extern rmr_mbuf_t* rmr_alloc_msg( void* vctx, int size );
97 extern rmr_mbuf_t* rmr_call( void* vctx, rmr_mbuf_t* msg );
98 extern void rmr_close( void* vctx );
99 extern void* rmr_init( char* proto_port, int max_msg_size, int flags );
100 extern int rmr_init_trace( void* vctx, int size );
101 extern int rmr_payload_size( rmr_mbuf_t* msg );
102 extern rmr_mbuf_t* rmr_send_msg( void* vctx, rmr_mbuf_t* msg );
103 extern rmr_mbuf_t* rmr_mtosend_msg( void* vctx, rmr_mbuf_t* msg, int max_to );
104 extern rmr_mbuf_t* rmr_rcv_msg( void* vctx, rmr_mbuf_t* old_msg );
105 extern rmr_mbuf_t* rmr_rcv_specific( void* uctx, rmr_mbuf_t* msg, char* expect, int allow2queue );
106 extern rmr_mbuf_t* rmr_rts_msg( void* vctx, rmr_mbuf_t* msg );
107 extern int rmr_ready( void* vctx );
108 extern int rmr_set_rtimeout( void* vctx, int time );
109 extern int rmr_set_stimeout( void* vctx, int time );
110 extern int rmr_get_rcvfd( void* vctx ); // only supported with nng
111 extern rmr_mbuf_t* rmr_torcv_msg( void* vctx, rmr_mbuf_t* old_msg, int ms_to );
112 extern rmr_mbuf_t* rmr_tralloc_msg( void* context, int msize, int trsize, unsigned const char* data );
113 extern rmr_whid_t rmr_wh_open( void* vctx, char const* target );
114 extern rmr_mbuf_t* rmr_wh_send_msg( void* vctx, rmr_whid_t whid, rmr_mbuf_t* msg );
115 extern void rmr_wh_close( void* vctx, int whid );
118 // ----- msg buffer operations (no context needed) ------------------------------------------------------
119 extern int rmr_bytes2meid( rmr_mbuf_t* mbuf, unsigned char const* src, int len );
120 extern void rmr_bytes2payload( rmr_mbuf_t* mbuf, unsigned char const* src, int len );
121 extern int rmr_bytes2xact( rmr_mbuf_t* mbuf, unsigned char const* src, int len );
122 extern void rmr_free_msg( rmr_mbuf_t* mbuf );
123 extern unsigned char* rmr_get_meid( rmr_mbuf_t* mbuf, unsigned char* dest );
124 extern rmr_mbuf_t* rmr_realloc_msg( rmr_mbuf_t* mbuf, int new_tr_size );
125 extern int rmr_str2meid( rmr_mbuf_t* mbuf, unsigned char const* str );
126 extern void rmr_str2payload( rmr_mbuf_t* mbuf, unsigned char const* str );
127 extern void rmr_str2payload( rmr_mbuf_t* mbuf, unsigned char const* str );
128 extern int rmr_str2xact( rmr_mbuf_t* mbuf, unsigned char const* str );
130 extern int rmr_get_trlen( rmr_mbuf_t* msg );
131 extern int rmr_get_trace( rmr_mbuf_t* msg, unsigned char* dest, int size );
132 extern int rmr_set_trace( rmr_mbuf_t* msg, unsigned const char* data, int size );
134 extern int rmr_rcv_to( void* vctx, int time ); // DEPRECATED -- replaced with set_rtimeout
135 extern int rmr_send_to( void* vctx, int time ); // DEPRECATED -- replaced with set_stimeout
138 // --- uta compatability defs if needed user should define UTA_COMPAT ----------------------------------
140 #pragma message( "use of UTA_COMPAT is deprecated and soon to be removed" )
142 #define UTA_MAX_XID RMR_MAX_XID
143 #define UTA_MAX_SID RMR_MAX_SID
144 #define UTA_MAX_SRC RMR_MAX_SRC
145 #define UTA_MAX_RCV_BYTES RMR_MAX_RCV_BYTES
147 #define UTAFL_NONE RMRFL_NONE
148 #define UTAFL_AUTO_ALLOC RMRFL_AUTO_ALLOC
150 #define UTA_DEF_SIZE RMRFL_AUTO_ALLOC
152 #define UTA_OK RMR_OK
153 #define UTA_ERR_BADARG RMR_ERR_BADARG
154 #define UTA_ERR_NOENDPT RMR_ERR_NOENDPT
155 #define UTA_ERR_EMPTY RMR_ERR_EMPTY
156 #define UTA_ERR_NOHDR RMR_ERR_NOHDR
157 #define UTA_ERR_SENDFAILED RMR_ERR_SENDFAILED
158 #define UTA_ERR_CALLFAILED RMR_ERR_CALLFAILED
160 #define uta_mbuf_t rmr_mbuf_t
162 #define uta_alloc_msg rmr_alloc_msg
163 #define uta_call rmr_call
164 #define uta_free_msg rmr_free_msg
165 #define uta_init rmr_init
166 #define uta_payload_size rmr_payload_size
167 #define uta_send_msg rmr_send_msg
168 #define uta_rcv_msg rmr_rcv_msg
169 #define uta_rcv_specific rmr_rcv_specific
170 #define uta_rcv_to rmr_rcv_to
171 #define uta_rts_msg rmr_rts_msg
172 #define uta_ready rmr_ready
173 #define uta_send_to rmr_send_to
181 #endif // dup include prevention