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Update imsg and remove workaround.

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This commit is contained in:
Nicholas Marriott
2024-11-27 10:30:52 +00:00
parent db771ec6e3
commit 252f41818e
6 changed files with 57 additions and 70 deletions
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52
compat/imsg.c
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@@ -1,4 +1,4 @@
/* $OpenBSD: imsg.c,v 1.36 2024/11/21 13:03:21 claudio Exp $ */
/* $OpenBSD: imsg.c,v 1.37 2024/11/26 13:57:31 claudio Exp $ */
/*
* Copyright (c) 2023 Claudio Jeker <claudio@openbsd.org>
@@ -22,6 +22,7 @@
#include <sys/uio.h>
#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
@@ -30,8 +31,9 @@
#include "imsg.h"
#define IMSG_ALLOW_FDPASS 0x01
#define IMSG_FD_MARK 0x80000000U
static ssize_t imsg_parse_hdr(struct ibuf *, void *);
static struct ibuf *imsg_parse_hdr(struct ibuf *, void *, int *);
int
imsgbuf_init(struct imsgbuf *imsgbuf, int fd)
@@ -53,12 +55,15 @@ imsgbuf_allow_fdpass(struct imsgbuf *imsgbuf)
imsgbuf->flags |= IMSG_ALLOW_FDPASS;
}
void
int
imsgbuf_set_maxsize(struct imsgbuf *imsgbuf, uint32_t maxsize)
{
if (maxsize < IMSG_HEADER_SIZE)
return;
if (maxsize < IMSG_HEADER_SIZE || maxsize & IMSG_FD_MARK) {
errno = EINVAL;
return (-1);
}
imsgbuf->maxsize = maxsize;
return (0);
}
int
@@ -119,6 +124,7 @@ imsg_get(struct imsgbuf *imsgbuf, struct imsg *imsg)
else
m.data = NULL;
m.buf = buf;
m.hdr.len &= ~IMSG_FD_MARK;
*imsg = m;
return (ibuf_size(buf) + IMSG_HEADER_SIZE);
@@ -267,7 +273,7 @@ int
imsg_forward(struct imsgbuf *imsgbuf, struct imsg *msg)
{
struct ibuf *wbuf;
size_t len = 0;
size_t len;
ibuf_rewind(msg->buf);
ibuf_skip(msg->buf, sizeof(msg->hdr));
@@ -277,7 +283,7 @@ imsg_forward(struct imsgbuf *imsgbuf, struct imsg *msg)
msg->hdr.pid, len)) == NULL)
return (-1);
if (msg->buf != NULL) {
if (len != 0) {
if (ibuf_add_ibuf(wbuf, msg->buf) == -1) {
ibuf_free(wbuf);
return (-1);
@@ -329,9 +335,12 @@ void
imsg_close(struct imsgbuf *imsgbuf, struct ibuf *msg)
{
struct imsg_hdr *hdr;
uint32_t len;
hdr = (struct imsg_hdr *)msg->buf;
hdr->len = ibuf_size(msg);
len = ibuf_size(msg);
if (ibuf_fd_avail(msg))
len |= IMSG_FD_MARK;
(void)ibuf_set_h32(msg, offsetof(struct imsg_hdr, len), len);
ibuf_close(imsgbuf->w, msg);
}
@@ -341,18 +350,29 @@ imsg_free(struct imsg *imsg)
ibuf_free(imsg->buf);
}
static ssize_t
imsg_parse_hdr(struct ibuf *buf, void *arg)
static struct ibuf *
imsg_parse_hdr(struct ibuf *buf, void *arg, int *fd)
{
struct imsgbuf *imsgbuf = arg;
struct imsg_hdr hdr;
struct ibuf *b;
uint32_t len;
if (ibuf_get(buf, &hdr, sizeof(hdr)) == -1)
return -1;
if (hdr.len < IMSG_HEADER_SIZE ||
hdr.len > imsgbuf->maxsize) {
return (NULL);
len = hdr.len & ~IMSG_FD_MARK;
if (len < IMSG_HEADER_SIZE || len > imsgbuf->maxsize) {
errno = ERANGE;
return (-1);
return (NULL);
}
return hdr.len;
if ((b = ibuf_open(len)) == NULL)
return (NULL);
if (hdr.len & IMSG_FD_MARK) {
ibuf_fd_set(b, *fd);
*fd = -1;
}
return b;
}