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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:06:34 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:06:34 +0000 |
commit | 5e61585d76ae77fd5e9e96ebabb57afa4d74880d (patch) | |
tree | 2b467823aaeebc7ef8bc9e3cabe8074eaef1666d /src/util/pass_accept.c | |
parent | Initial commit. (diff) | |
download | postfix-upstream/3.5.24.tar.xz postfix-upstream/3.5.24.zip |
Adding upstream version 3.5.24.upstream/3.5.24upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/util/pass_accept.c')
-rw-r--r-- | src/util/pass_accept.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/util/pass_accept.c b/src/util/pass_accept.c new file mode 100644 index 0000000..d06926f --- /dev/null +++ b/src/util/pass_accept.c @@ -0,0 +1,106 @@ +/*++ +/* NAME +/* pass_accept 3 +/* SUMMARY +/* start UNIX-domain file descriptor listener +/* SYNOPSIS +/* #include <listen.h> +/* +/* int pass_accept(listen_fd) +/* int listen_fd; +/* +/* int pass_accept_attr(listen_fd, attr) +/* int listen_fd; +/* HTABLE **attr; +/* DESCRIPTION +/* This module implements a listener that receives one attribute list +/* and file descriptor over each a local connection that is made to it. +/* +/* Arguments: +/* .IP attr +/* Pointer to attribute list pointer. In case of error, or +/* no attributes, the attribute list pointer is set to null. +/* .IP listen_fd +/* File descriptor returned by LOCAL_LISTEN(). +/* DIAGNOSTICS +/* Warnings: I/O errors, timeout. +/* LICENSE +/* .ad +/* .fi +/* The Secure Mailer license must be distributed with this software. +/* AUTHOR(S) +/* Wietse Venema +/* IBM T.J. Watson Research +/* P.O. Box 704 +/* Yorktown Heights, NY 10598, USA +/*--*/ + +/* System library. */ + +#include <sys_defs.h> +#include <errno.h> +#include <unistd.h> + +/* Utility library. */ + +#include <msg.h> +#include <listen.h> +#include <attr.h> + +#define PASS_ACCEPT_TMOUT 100 + +/* pass_accept - accept descriptor */ + +int pass_accept(int listen_fd) +{ + const char *myname = "pass_accept"; + int accept_fd; + int recv_fd = -1; + + accept_fd = LOCAL_ACCEPT(listen_fd); + if (accept_fd < 0) { + if (errno != EAGAIN) + msg_warn("%s: cannot accept connection: %m", myname); + return (-1); + } else { + if (read_wait(accept_fd, PASS_ACCEPT_TMOUT) < 0) + msg_warn("%s: timeout receiving file descriptor: %m", myname); + else if ((recv_fd = LOCAL_RECV_FD(accept_fd)) < 0) + msg_warn("%s: cannot receive file descriptor: %m", myname); + if (close(accept_fd) < 0) + msg_warn("%s: close: %m", myname); + return (recv_fd); + } +} + +/* pass_accept_attr - accept descriptor and attribute list */ + +int pass_accept_attr(int listen_fd, HTABLE **attr) +{ + const char *myname = "pass_accept_attr"; + int accept_fd; + int recv_fd = -1; + + *attr = 0; + accept_fd = LOCAL_ACCEPT(listen_fd); + if (accept_fd < 0) { + if (errno != EAGAIN) + msg_warn("%s: cannot accept connection: %m", myname); + return (-1); + } else { + if (read_wait(accept_fd, PASS_ACCEPT_TMOUT) < 0) + msg_warn("%s: timeout receiving file descriptor: %m", myname); + else if ((recv_fd = LOCAL_RECV_FD(accept_fd)) < 0) + msg_warn("%s: cannot receive file descriptor: %m", myname); + else if (read_wait(accept_fd, PASS_ACCEPT_TMOUT) < 0 + || recv_pass_attr(accept_fd, attr, PASS_ACCEPT_TMOUT, 0) < 0) { + msg_warn("%s: cannot receive connection attributes: %m", myname); + if (close(recv_fd) < 0) + msg_warn("%s: close: %m", myname); + recv_fd = -1; + } + if (close(accept_fd) < 0) + msg_warn("%s: close: %m", myname); + return (recv_fd); + } +} |