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354
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10
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11
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12 #if (NGX_HAVE_KQUEUE)
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13
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14 ssize_t
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15 ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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16 {
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17 ssize_t n;
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18 ngx_err_t err;
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19 ngx_event_t *rev;
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20
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21 rev = c->read;
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22
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23 do {
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24 n = recv(c->fd, buf, size, 0);
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25
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26 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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27 "recv: fd:%d %d of %d", c->fd, n, size);
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28
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29 if (n >= 0) {
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30 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
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31 rev->available -= n;
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32
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33 /*
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34 * rev->available may be negative here because some additional
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35 * bytes may be received between kevent() and recv()
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36 */
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37
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38 if (rev->available <= 0) {
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39 rev->ready = 0;
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40 rev->available = 0;
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41 }
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42 }
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43
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44 return n;
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45 }
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46
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47 err = ngx_socket_errno;
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48
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49 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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50 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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51 "recv() not ready");
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52 n = NGX_AGAIN;
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53
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54 } else {
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55 n = ngx_connection_error(c, err, "recv() failed");
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56 break;
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57 }
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58
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59 } while (err == NGX_EINTR);
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60
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61 rev->ready = 0;
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62
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63 if (n == NGX_ERROR){
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64 rev->error = 1;
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65 }
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66
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67 return n;
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68 }
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69
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70 #else /* ! NGX_HAVE_KQUEUE */
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71
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72 ssize_t
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73 ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
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74 {
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75 ssize_t n;
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76 ngx_err_t err;
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77 ngx_event_t *rev;
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78
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79 rev = c->read;
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80
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81 do {
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82 n = recv(c->fd, buf, size, 0);
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83
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84 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
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85 "recv: fd:%d %d of %d", c->fd, n, size);
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86
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87 if (n >= 0) {
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88 return n;
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89 }
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90
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91 err = ngx_socket_errno;
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92
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93 if (err == NGX_EAGAIN || err == NGX_EINTR) {
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94 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
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95 "recv() not ready");
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96 n = NGX_AGAIN;
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97
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98 } else {
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99 n = ngx_connection_error(c, err, "recv() failed");
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100 break;
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101 }
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102
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103 } while (err == NGX_EINTR);
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104
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105 rev->ready = 0;
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106
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107 if (n == NGX_ERROR){
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108 rev->error = 1;
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109 }
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110
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111 return n;
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112 }
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113
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114 #endif /* NGX_HAVE_KQUEUE */
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