diff options
Diffstat (limited to 'app/nginx/src/os/unix/ngx_channel.c')
| -rw-r--r-- | app/nginx/src/os/unix/ngx_channel.c | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/app/nginx/src/os/unix/ngx_channel.c b/app/nginx/src/os/unix/ngx_channel.c deleted file mode 100644 index 1efa066..0000000 --- a/app/nginx/src/os/unix/ngx_channel.c +++ /dev/null @@ -1,253 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_channel.h> - - -ngx_int_t -ngx_write_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size, - ngx_log_t *log) -{ - ssize_t n; - ngx_err_t err; - struct iovec iov[1]; - struct msghdr msg; - -#if (NGX_HAVE_MSGHDR_MSG_CONTROL) - - union { - struct cmsghdr cm; - char space[CMSG_SPACE(sizeof(int))]; - } cmsg; - - if (ch->fd == -1) { - msg.msg_control = NULL; - msg.msg_controllen = 0; - - } else { - msg.msg_control = (caddr_t) &cmsg; - msg.msg_controllen = sizeof(cmsg); - - ngx_memzero(&cmsg, sizeof(cmsg)); - - cmsg.cm.cmsg_len = CMSG_LEN(sizeof(int)); - cmsg.cm.cmsg_level = SOL_SOCKET; - cmsg.cm.cmsg_type = SCM_RIGHTS; - - /* - * We have to use ngx_memcpy() instead of simple - * *(int *) CMSG_DATA(&cmsg.cm) = ch->fd; - * because some gcc 4.4 with -O2/3/s optimization issues the warning: - * dereferencing type-punned pointer will break strict-aliasing rules - * - * Fortunately, gcc with -O1 compiles this ngx_memcpy() - * in the same simple assignment as in the code above - */ - - ngx_memcpy(CMSG_DATA(&cmsg.cm), &ch->fd, sizeof(int)); - } - - msg.msg_flags = 0; - -#else - - if (ch->fd == -1) { - msg.msg_accrights = NULL; - msg.msg_accrightslen = 0; - - } else { - msg.msg_accrights = (caddr_t) &ch->fd; - msg.msg_accrightslen = sizeof(int); - } - -#endif - - iov[0].iov_base = (char *) ch; - iov[0].iov_len = size; - - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_iov = iov; - msg.msg_iovlen = 1; - - n = sendmsg(s, &msg, 0); - - if (n == -1) { - err = ngx_errno; - if (err == NGX_EAGAIN) { - return NGX_AGAIN; - } - - ngx_log_error(NGX_LOG_ALERT, log, err, "sendmsg() failed"); - return NGX_ERROR; - } - - return NGX_OK; -} - - -ngx_int_t -ngx_read_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size, ngx_log_t *log) -{ - ssize_t n; - ngx_err_t err; - struct iovec iov[1]; - struct msghdr msg; - -#if (NGX_HAVE_MSGHDR_MSG_CONTROL) - union { - struct cmsghdr cm; - char space[CMSG_SPACE(sizeof(int))]; - } cmsg; -#else - int fd; -#endif - - iov[0].iov_base = (char *) ch; - iov[0].iov_len = size; - - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_iov = iov; - msg.msg_iovlen = 1; - -#if (NGX_HAVE_MSGHDR_MSG_CONTROL) - msg.msg_control = (caddr_t) &cmsg; - msg.msg_controllen = sizeof(cmsg); -#else - msg.msg_accrights = (caddr_t) &fd; - msg.msg_accrightslen = sizeof(int); -#endif - - n = recvmsg(s, &msg, 0); - - if (n == -1) { - err = ngx_errno; - if (err == NGX_EAGAIN) { - return NGX_AGAIN; - } - - ngx_log_error(NGX_LOG_ALERT, log, err, "recvmsg() failed"); - return NGX_ERROR; - } - - if (n == 0) { - ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "recvmsg() returned zero"); - return NGX_ERROR; - } - - if ((size_t) n < sizeof(ngx_channel_t)) { - ngx_log_error(NGX_LOG_ALERT, log, 0, - "recvmsg() returned not enough data: %z", n); - return NGX_ERROR; - } - -#if (NGX_HAVE_MSGHDR_MSG_CONTROL) - - if (ch->command == NGX_CMD_OPEN_CHANNEL) { - - if (cmsg.cm.cmsg_len < (socklen_t) CMSG_LEN(sizeof(int))) { - ngx_log_error(NGX_LOG_ALERT, log, 0, - "recvmsg() returned too small ancillary data"); - return NGX_ERROR; - } - - if (cmsg.cm.cmsg_level != SOL_SOCKET || cmsg.cm.cmsg_type != SCM_RIGHTS) - { - ngx_log_error(NGX_LOG_ALERT, log, 0, - "recvmsg() returned invalid ancillary data " - "level %d or type %d", - cmsg.cm.cmsg_level, cmsg.cm.cmsg_type); - return NGX_ERROR; - } - - /* ch->fd = *(int *) CMSG_DATA(&cmsg.cm); */ - - ngx_memcpy(&ch->fd, CMSG_DATA(&cmsg.cm), sizeof(int)); - } - - if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) { - ngx_log_error(NGX_LOG_ALERT, log, 0, - "recvmsg() truncated data"); - } - -#else - - if (ch->command == NGX_CMD_OPEN_CHANNEL) { - if (msg.msg_accrightslen != sizeof(int)) { - ngx_log_error(NGX_LOG_ALERT, log, 0, - "recvmsg() returned no ancillary data"); - return NGX_ERROR; - } - - ch->fd = fd; - } - -#endif - - return n; -} - - -ngx_int_t -ngx_add_channel_event(ngx_cycle_t *cycle, ngx_fd_t fd, ngx_int_t event, - ngx_event_handler_pt handler) -{ - ngx_event_t *ev, *rev, *wev; - ngx_connection_t *c; - - c = ngx_get_connection(fd, cycle->log); - - if (c == NULL) { - return NGX_ERROR; - } - - c->pool = cycle->pool; - - rev = c->read; - wev = c->write; - - rev->log = cycle->log; - wev->log = cycle->log; - - rev->channel = 1; - wev->channel = 1; - - ev = (event == NGX_READ_EVENT) ? rev : wev; - - ev->handler = handler; - - if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0) { - if (ngx_add_conn(c) == NGX_ERROR) { - ngx_free_connection(c); - return NGX_ERROR; - } - - } else { - if (ngx_add_event(ev, event, 0) == NGX_ERROR) { - ngx_free_connection(c); - return NGX_ERROR; - } - } - - return NGX_OK; -} - - -void -ngx_close_channel(ngx_fd_t *fd, ngx_log_t *log) -{ - if (close(fd[0]) == -1) { - ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() channel failed"); - } - - if (close(fd[1]) == -1) { - ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() channel failed"); - } -} |