2ec483c58e
to syslog if we run in background. - Asserts in proto.c that method we want to call is implemented and remove dummy methods from protocols implementation that are only there to abort the program with nice message. MFC after: 1 week
237 lines
5.6 KiB
C
237 lines
5.6 KiB
C
/*-
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* Copyright (c) 2009-2010 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Pawel Jakub Dawidek under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "hast.h"
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#include "pjdlog.h"
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#include "proto_impl.h"
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#define SP_CTX_MAGIC 0x50c3741
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struct sp_ctx {
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int sp_magic;
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int sp_fd[2];
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int sp_side;
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#define SP_SIDE_UNDEF 0
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#define SP_SIDE_CLIENT 1
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#define SP_SIDE_SERVER 2
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};
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static void sp_close(void *ctx);
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static int
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sp_client(const char *addr, void **ctxp)
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{
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struct sp_ctx *spctx;
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int ret;
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if (strcmp(addr, "socketpair://") != 0)
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return (-1);
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spctx = malloc(sizeof(*spctx));
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if (spctx == NULL)
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return (errno);
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if (socketpair(PF_UNIX, SOCK_STREAM, 0, spctx->sp_fd) < 0) {
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ret = errno;
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free(spctx);
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return (ret);
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}
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spctx->sp_side = SP_SIDE_UNDEF;
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spctx->sp_magic = SP_CTX_MAGIC;
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*ctxp = spctx;
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return (0);
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}
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static int
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sp_send(void *ctx, const unsigned char *data, size_t size)
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{
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struct sp_ctx *spctx = ctx;
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int fd;
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PJDLOG_ASSERT(spctx != NULL);
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PJDLOG_ASSERT(spctx->sp_magic == SP_CTX_MAGIC);
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switch (spctx->sp_side) {
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case SP_SIDE_UNDEF:
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/*
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* If the first operation done by the caller is proto_send(),
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* we assume this the client.
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*/
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/* FALLTHROUGH */
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spctx->sp_side = SP_SIDE_CLIENT;
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/* Close other end. */
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close(spctx->sp_fd[1]);
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spctx->sp_fd[1] = -1;
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case SP_SIDE_CLIENT:
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PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
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fd = spctx->sp_fd[0];
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break;
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case SP_SIDE_SERVER:
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PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
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fd = spctx->sp_fd[1];
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break;
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default:
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PJDLOG_ABORT("Invalid socket side (%d).", spctx->sp_side);
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}
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/* Someone is just trying to decide about side. */
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if (data == NULL)
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return (0);
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return (proto_common_send(fd, data, size));
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}
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static int
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sp_recv(void *ctx, unsigned char *data, size_t size)
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{
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struct sp_ctx *spctx = ctx;
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int fd;
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PJDLOG_ASSERT(spctx != NULL);
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PJDLOG_ASSERT(spctx->sp_magic == SP_CTX_MAGIC);
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switch (spctx->sp_side) {
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case SP_SIDE_UNDEF:
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/*
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* If the first operation done by the caller is proto_recv(),
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* we assume this the server.
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*/
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/* FALLTHROUGH */
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spctx->sp_side = SP_SIDE_SERVER;
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/* Close other end. */
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close(spctx->sp_fd[0]);
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spctx->sp_fd[0] = -1;
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case SP_SIDE_SERVER:
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PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
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fd = spctx->sp_fd[1];
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break;
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case SP_SIDE_CLIENT:
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PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
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fd = spctx->sp_fd[0];
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break;
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default:
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PJDLOG_ABORT("Invalid socket side (%d).", spctx->sp_side);
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}
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/* Someone is just trying to decide about side. */
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if (data == NULL)
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return (0);
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return (proto_common_recv(fd, data, size));
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}
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static int
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sp_descriptor(const void *ctx)
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{
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const struct sp_ctx *spctx = ctx;
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PJDLOG_ASSERT(spctx != NULL);
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PJDLOG_ASSERT(spctx->sp_magic == SP_CTX_MAGIC);
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PJDLOG_ASSERT(spctx->sp_side == SP_SIDE_CLIENT ||
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spctx->sp_side == SP_SIDE_SERVER);
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switch (spctx->sp_side) {
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case SP_SIDE_CLIENT:
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PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
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return (spctx->sp_fd[0]);
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case SP_SIDE_SERVER:
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PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
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return (spctx->sp_fd[1]);
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}
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PJDLOG_ABORT("Invalid socket side (%d).", spctx->sp_side);
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}
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static void
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sp_close(void *ctx)
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{
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struct sp_ctx *spctx = ctx;
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PJDLOG_ASSERT(spctx != NULL);
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PJDLOG_ASSERT(spctx->sp_magic == SP_CTX_MAGIC);
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switch (spctx->sp_side) {
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case SP_SIDE_UNDEF:
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PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
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close(spctx->sp_fd[0]);
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spctx->sp_fd[0] = -1;
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PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
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close(spctx->sp_fd[1]);
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spctx->sp_fd[1] = -1;
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break;
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case SP_SIDE_CLIENT:
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PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
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close(spctx->sp_fd[0]);
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spctx->sp_fd[0] = -1;
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PJDLOG_ASSERT(spctx->sp_fd[1] == -1);
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break;
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case SP_SIDE_SERVER:
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PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
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close(spctx->sp_fd[1]);
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spctx->sp_fd[1] = -1;
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PJDLOG_ASSERT(spctx->sp_fd[0] == -1);
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break;
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default:
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PJDLOG_ABORT("Invalid socket side (%d).", spctx->sp_side);
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}
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spctx->sp_magic = 0;
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free(spctx);
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}
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static struct hast_proto sp_proto = {
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.hp_name = "socketpair",
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.hp_client = sp_client,
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.hp_send = sp_send,
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.hp_recv = sp_recv,
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.hp_descriptor = sp_descriptor,
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.hp_close = sp_close
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};
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static __constructor void
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sp_ctor(void)
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{
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proto_register(&sp_proto, false);
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}
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