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Diffstat (limited to 'usr.sbin/ripd/imsg.c')
-rw-r--r--usr.sbin/ripd/imsg.c148
1 files changed, 112 insertions, 36 deletions
diff --git a/usr.sbin/ripd/imsg.c b/usr.sbin/ripd/imsg.c
index 28a9cb17ba7..1488ac4796b 100644
--- a/usr.sbin/ripd/imsg.c
+++ b/usr.sbin/ripd/imsg.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: imsg.c,v 1.2 2007/03/19 10:10:29 henning Exp $ */
+/* $OpenBSD: imsg.c,v 1.3 2009/06/06 08:20:55 eric Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -16,7 +16,9 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/socket.h>
#include <sys/uio.h>
#include <errno.h>
@@ -24,30 +26,44 @@
#include <string.h>
#include <unistd.h>
-#include "ripd.h"
-#include "log.h"
+#include "imsg.h"
void
-imsg_init(struct imsgbuf *ibuf, int fd, void (*handler)(int, short, void *))
+imsg_init(struct imsgbuf *ibuf, int fd)
{
msgbuf_init(&ibuf->w);
bzero(&ibuf->r, sizeof(ibuf->r));
ibuf->fd = fd;
ibuf->w.fd = fd;
ibuf->pid = getpid();
- ibuf->handler = handler;
TAILQ_INIT(&ibuf->fds);
}
ssize_t
imsg_read(struct imsgbuf *ibuf)
{
+ struct msghdr msg;
+ struct cmsghdr *cmsg;
+ union {
+ struct cmsghdr hdr;
+ char buf[CMSG_SPACE(sizeof(int) * 16)];
+ } cmsgbuf;
+ struct iovec iov;
ssize_t n;
+ int fd;
+ struct imsg_fd *ifd;
- if ((n = recv(ibuf->fd, ibuf->r.buf + ibuf->r.wpos,
- sizeof(ibuf->r.buf) - ibuf->r.wpos, 0)) == -1) {
+ bzero(&msg, sizeof(msg));
+
+ iov.iov_base = ibuf->r.buf + ibuf->r.wpos;
+ iov.iov_len = sizeof(ibuf->r.buf) - ibuf->r.wpos;
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = &cmsgbuf.buf;
+ msg.msg_controllen = sizeof(cmsgbuf.buf);
+
+ if ((n = recvmsg(ibuf->fd, &msg, 0)) == -1) {
if (errno != EINTR && errno != EAGAIN) {
- log_warn("imsg_read: pipe read error");
return (-1);
}
return (-2);
@@ -55,6 +71,21 @@ imsg_read(struct imsgbuf *ibuf)
ibuf->r.wpos += n;
+ for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
+ cmsg = CMSG_NXTHDR(&msg, cmsg)) {
+ if (cmsg->cmsg_level == SOL_SOCKET &&
+ cmsg->cmsg_type == SCM_RIGHTS) {
+ fd = (*(int *)CMSG_DATA(cmsg));
+ if ((ifd = calloc(1, sizeof(struct imsg_fd))) == NULL) {
+ /* XXX: this return can leak */
+ return (-1);
+ }
+ ifd->fd = fd;
+ TAILQ_INSERT_TAIL(&ibuf->fds, ifd, entry);
+ }
+ /* we do not handle other ctl data level */
+ }
+
return (n);
}
@@ -71,8 +102,7 @@ imsg_get(struct imsgbuf *ibuf, struct imsg *imsg)
memcpy(&imsg->hdr, ibuf->r.buf, sizeof(imsg->hdr));
if (imsg->hdr.len < IMSG_HEADER_SIZE ||
imsg->hdr.len > MAX_IMSGSIZE) {
- log_warnx("imsg_get: imsg hdr len %u out of bounds, type=%u",
- imsg->hdr.len, imsg->hdr.type);
+ errno = ERANGE;
return (-1);
}
if (imsg->hdr.len > av)
@@ -80,7 +110,6 @@ imsg_get(struct imsgbuf *ibuf, struct imsg *imsg)
datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
ibuf->r.rptr = ibuf->r.buf + IMSG_HEADER_SIZE;
if ((imsg->data = malloc(datalen)) == NULL) {
- log_warn("imsg_get");
return (-1);
}
memcpy(imsg->data, ibuf->r.rptr, datalen);
@@ -96,11 +125,10 @@ imsg_get(struct imsgbuf *ibuf, struct imsg *imsg)
}
int
-imsg_compose(struct imsgbuf *ibuf, enum imsg_type type, u_int32_t peerid,
- pid_t pid, void *data, u_int16_t datalen)
+imsg_compose(struct imsgbuf *ibuf, u_int16_t type, u_int32_t peerid,
+ pid_t pid, int fd, void *data, u_int16_t datalen)
{
struct buf *wbuf;
- int n;
if ((wbuf = imsg_create(ibuf, type, peerid, pid, datalen)) == NULL)
return (-1);
@@ -108,34 +136,56 @@ imsg_compose(struct imsgbuf *ibuf, enum imsg_type type, u_int32_t peerid,
if (imsg_add(wbuf, data, datalen) == -1)
return (-1);
- if ((n = imsg_close(ibuf, wbuf)) < 0)
+ wbuf->fd = fd;
+
+ imsg_close(ibuf, wbuf);
+
+ return (1);
+}
+
+int
+imsg_composev(struct imsgbuf *ibuf, u_int16_t type, u_int32_t peerid,
+ pid_t pid, int fd, const struct iovec *iov, int iovcnt)
+{
+ struct buf *wbuf;
+ int i, datalen = 0;
+
+ for (i = 0; i < iovcnt; i++)
+ datalen += iov[i].iov_len;
+
+ if ((wbuf = imsg_create(ibuf, type, peerid, pid, datalen)) == NULL)
return (-1);
- return (n);
+ for (i = 0; i < iovcnt; i++)
+ if (imsg_add(wbuf, iov[i].iov_base, iov[i].iov_len) == -1)
+ return (-1);
+
+ wbuf->fd = fd;
+
+ imsg_close(ibuf, wbuf);
+
+ return (1);
}
/* ARGSUSED */
struct buf *
-imsg_create(struct imsgbuf *ibuf, enum imsg_type type, u_int32_t peerid,
+imsg_create(struct imsgbuf *ibuf, u_int16_t type, u_int32_t peerid,
pid_t pid, u_int16_t datalen)
{
struct buf *wbuf;
struct imsg_hdr hdr;
- if (datalen > MAX_IMSGSIZE - IMSG_HEADER_SIZE) {
- log_warnx("imsg_create: len %u > MAX_IMSGSIZE; "
- "type %u peerid %lu", datalen + IMSG_HEADER_SIZE,
- type, peerid);
+ datalen += IMSG_HEADER_SIZE;
+ if (datalen > MAX_IMSGSIZE) {
+ errno = ERANGE;
return (NULL);
}
- hdr.len = (u_int16_t)(datalen + IMSG_HEADER_SIZE);
hdr.type = type;
hdr.peerid = peerid;
if ((hdr.pid = pid) == 0)
hdr.pid = ibuf->pid;
- if ((wbuf = buf_open(hdr.len)) == NULL) {
- log_warn("imsg_create: buf_open");
+ if ((wbuf = buf_dynamic(datalen, MAX_IMSGSIZE)) == NULL) {
return (NULL);
}
if (imsg_add(wbuf, &hdr, sizeof(hdr)) == -1)
@@ -149,26 +199,20 @@ imsg_add(struct buf *msg, void *data, u_int16_t datalen)
{
if (datalen)
if (buf_add(msg, data, datalen) == -1) {
- log_warnx("imsg_add: buf_add error");
buf_free(msg);
return (-1);
}
return (datalen);
}
-int
+void
imsg_close(struct imsgbuf *ibuf, struct buf *msg)
{
- int n;
+ struct imsg_hdr *hdr;
- if ((n = buf_close(&ibuf->w, msg)) < 0) {
- log_warnx("imsg_close: buf_close error");
- buf_free(msg);
- return (-1);
- }
- imsg_event_add(ibuf);
-
- return (n);
+ hdr = (struct imsg_hdr *)msg->buf;
+ hdr->len = (u_int16_t)msg->wpos;
+ buf_close(&ibuf->w, msg);
}
void
@@ -176,3 +220,35 @@ imsg_free(struct imsg *imsg)
{
free(imsg->data);
}
+
+int
+imsg_get_fd(struct imsgbuf *ibuf)
+{
+ int fd;
+ struct imsg_fd *ifd;
+
+ if ((ifd = TAILQ_FIRST(&ibuf->fds)) == NULL)
+ return (-1);
+
+ fd = ifd->fd;
+ TAILQ_REMOVE(&ibuf->fds, ifd, entry);
+ free(ifd);
+
+ return (fd);
+}
+
+int
+imsg_flush(struct imsgbuf *ibuf)
+{
+ while (ibuf->w.queued)
+ if (msgbuf_write(&ibuf->w) < 0)
+ return (-1);
+ return (0);
+}
+
+void
+imsg_clear(struct imsgbuf *ibuf)
+{
+ while (ibuf->w.queued)
+ msgbuf_clear(&ibuf->w);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 05:19:49 +0000