1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* Copyright 2016 Garrett D'Amore <garrett@damore.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "core/nng_impl.h"
/*
* Socket implementation.
*/
/*
* nni_socket_sendq and nni_socket_recvq are called by the protocol to obtain
* the upper read and write queues.
*/
nni_msgqueue_t
nni_socket_sendq(nni_socket_t s)
{
return (s->s_uwq);
}
nni_msgqueue_t
nni_socket_recvq(nni_socket_t s)
{
return (s->s_urq);
}
int
nni_socket_create(nni_socket_t *sockp, uint16_t proto)
{
nni_socket_t sock;
struct nni_protocol *ops;
int rv;
if ((ops = nni_protocol_find(proto)) == NULL) {
return (NNG_ENOTSUP);
}
if ((sock = nni_alloc(sizeof (*sock))) == NULL) {
return (NNG_ENOMEM);
}
sock->s_ops = *ops;
NNI_LIST_INIT(&sock->s_pipes, struct nng_pipe, p_sock_node);
//NNI_LIST_INIT(&sock->s_eps, nni_endpt_t, ep_node);
if ((rv = sock->s_ops.proto_create(&sock->s_data, sock)) != 0) {
nni_free(sock, sizeof (*sock));
return (rv);
}
*sockp = sock;
return (0);
}
int
nni_socket_close(nni_socket_t sock)
{
nni_pipe_t pipe;
nni_endpt_t ep;
nni_msgqueue_close(sock->s_urq);
/* XXX: drain this? */
nni_msgqueue_close(sock->s_uwq);
nni_mutex_enter(sock->s_mx);
NNI_LIST_FOREACH(&sock->s_eps, ep) {
#if 0
nni_ep_stop(ep);
// OR....
nni_mutex_enter(ep->ep_mx);
ep->ep_stop = 1;
nni_cond_broadcast(ep->ep_cond);
nni_mutex_exit(ep->ep_mx);
#endif
break; /* REMOVE ME */
}
nni_mutex_exit(sock->s_mx);
/* XXX: close endpoints - no new pipes made... */
/* XXX: protocol shutdown */
/*
* Paths to pipe close:
*
* - user calls nng_pipe_close()
* - protocol calls pipe_close() after underlying close
* - socket calls pipe close due to socket_close (here)
*/
/* XXX: close remaining pipes */
while ((pipe = nni_list_first(&sock->s_pipes)) != NULL) {
nni_list_remove(&sock->s_pipes, pipe);
/* XXX: nni_pipe_destroy */
}
/* XXX: wait for workers to cease activity */
while ((ep = nni_list_first(&sock->s_eps)) != NULL) {
nni_list_remove(&sock->s_eps, ep);
/* XXX: nni_ep_destroy(ep); */
}
return (0);
}
int
nni_socket_sendmsg(nni_socket_t sock, nni_msg_t msg, int tmout)
{
int rv;
int besteffort;
/*
* Senderr is typically set by protocols when the state machine
* indicates that it is no longer valid to send a message. E.g.
* a REP socket with no REQ pending.
*/
nni_mutex_enter(sock->s_mx);
if ((rv = sock->s_senderr) != 0) {
nni_mutex_exit(sock->s_mx);
return (rv);
}
besteffort = sock->s_besteffort;
nni_mutex_exit(sock->s_mx);
if (sock->s_ops.proto_send_filter != NULL) {
msg = sock->s_ops.proto_send_filter(sock->s_data, msg);
if (msg == NULL) {
return (0);
}
}
if (besteffort) {
/*
* BestEffort mode -- if we cannot handle the message due to
* backpressure, we just throw it away, and don't complain.
*/
tmout = 0;
}
rv = nni_msgqueue_put(sock->s_uwq, msg, tmout);
if (besteffort && (rv == NNG_EAGAIN)) {
/* Pretend this worked... it didn't, but pretend. */
nni_msg_free(msg);
return (0);
}
return (rv);
}
uint16_t
nni_socket_protocol(nni_socket_t sock)
{
return (sock->s_ops.proto_self);
}
void
nni_socket_remove_pipe(nni_socket_t sock, nni_pipe_t pipe)
{
nni_mutex_enter(sock->s_mx);
if (pipe->p_sock != sock) {
nni_mutex_exit(sock->s_mx);
}
/*
* Remove the pipe from the protocol. Protocols may
* keep lists of pipes for managing their topologies.
*/
sock->s_ops.proto_remove_pipe(sock->s_data, pipe);
/* Now remove it from our own list */
nni_list_remove(&sock->s_pipes, pipe);
pipe->p_sock = NULL;
// XXX: Redial
// XXX: also publish event...
//if (pipe->p_ep != NULL) {
// nn_endpt_remove_pipe(pipe->p_ep, pipe)
//}
nni_mutex_exit(sock->s_mx);
}
int
nni_socket_add_pipe(nni_socket_t sock, nni_pipe_t pipe)
{
int rv;
nni_mutex_enter(sock->s_mx);
if ((rv = sock->s_ops.proto_add_pipe(sock->s_data, pipe)) != 0) {
nni_mutex_exit(sock->s_mx);
return (rv);
}
nni_list_append(&sock->s_pipes, pipe);
pipe->p_sock = sock;
/* XXX: Publish event */
nni_mutex_exit(sock->s_mx);
return (0);
}
|
