1 
2 /*
3  * Copyright (C) Igor Sysoev
4  * Copyright (C) Nginx, Inc.
5  */
6 
7 
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10 #include <ngx_event.h>
11 
12 
13 ssize_t
ngx_udp_unix_send(ngx_connection_t * c,u_char * buf,size_t size)14 ngx_udp_unix_send(ngx_connection_t *c, u_char *buf, size_t size)
15 {
16     ssize_t       n;
17     ngx_err_t     err;
18     ngx_event_t  *wev;
19 
20     wev = c->write;
21 
22     for ( ;; ) {
23         n = sendto(c->fd, buf, size, 0, c->sockaddr, c->socklen);
24 
25         ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
26                        "sendto: fd:%d %z of %uz to \"%V\"",
27                        c->fd, n, size, &c->addr_text);
28 
29         if (n >= 0) {
30             if ((size_t) n != size) {
31                 wev->error = 1;
32                 (void) ngx_connection_error(c, 0, "sendto() incomplete");
33                 return NGX_ERROR;
34             }
35 
36             c->sent += n;
37 
38             return n;
39         }
40 
41         err = ngx_socket_errno;
42 
43         if (err == NGX_EAGAIN) {
44             wev->ready = 0;
45             ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, NGX_EAGAIN,
46                            "sendto() not ready");
47             return NGX_AGAIN;
48         }
49 
50         if (err != NGX_EINTR) {
51             wev->error = 1;
52             (void) ngx_connection_error(c, err, "sendto() failed");
53             return NGX_ERROR;
54         }
55     }
56 }
57