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[RFC PATCH v3 09/11] net: dgram: add unix socket
From: |
Laurent Vivier |
Subject: |
[RFC PATCH v3 09/11] net: dgram: add unix socket |
Date: |
Mon, 20 Jun 2022 12:18:26 +0200 |
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
---
net/dgram.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 62 insertions(+), 3 deletions(-)
diff --git a/net/dgram.c b/net/dgram.c
index c0cf0410792e..9f20bdbc163c 100644
--- a/net/dgram.c
+++ b/net/dgram.c
@@ -85,8 +85,15 @@ static ssize_t net_dgram_receive_dgram(NetClientState *nc,
do {
if (s->dgram_dst) {
- ret = sendto(s->fd, buf, size, 0, s->dgram_dst,
- sizeof(struct sockaddr_in));
+ socklen_t len;
+
+ if (s->dgram_dst->sa_family == AF_INET) {
+ len = sizeof(struct sockaddr_in);
+ } else {
+ len = sizeof(struct sockaddr_un);
+ }
+
+ ret = sendto(s->fd, buf, size, 0, s->dgram_dst, len);
} else {
ret = send(s->fd, buf, size, 0);
}
@@ -508,7 +515,7 @@ static int net_dgram_udp_init(NetClientState *peer,
}
} else {
if (local->type != SOCKET_ADDRESS_TYPE_FD) {
- error_setg(errp, "type=inet requires remote parameter");
+ error_setg(errp, "type=inet or unix require remote parameter");
return -1;
}
}
@@ -558,6 +565,58 @@ static int net_dgram_udp_init(NetClientState *peer,
break;
}
+ case SOCKET_ADDRESS_TYPE_UNIX: {
+ struct sockaddr_un laddr_un, raddr_un;
+
+ ret = unlink(local->u.q_unix.path);
+ if (ret < 0 && errno != ENOENT) {
+ error_setg_errno(errp, errno, "failed to unlink socket %s",
+ local->u.q_unix.path);
+ return -1;
+ }
+
+ laddr_un.sun_family = PF_UNIX;
+ ret = snprintf(laddr_un.sun_path, sizeof(laddr_un.sun_path), "%s",
+ local->u.q_unix.path);
+ if (ret < 0 || ret >= sizeof(laddr_un.sun_path)) {
+ error_setg(errp, "UNIX socket path '%s' is too long",
+ local->u.q_unix.path);
+ error_append_hint(errp, "Path must be less than %zu bytes\n",
+ sizeof(laddr_un.sun_path));
+ }
+
+ raddr_un.sun_family = PF_UNIX;
+ ret = snprintf(raddr_un.sun_path, sizeof(raddr_un.sun_path), "%s",
+ remote->u.q_unix.path);
+ if (ret < 0 || ret >= sizeof(raddr_un.sun_path)) {
+ error_setg(errp, "UNIX socket path '%s' is too long",
+ remote->u.q_unix.path);
+ error_append_hint(errp, "Path must be less than %zu bytes\n",
+ sizeof(raddr_un.sun_path));
+ }
+
+ fd = qemu_socket(PF_UNIX, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "can't create datagram socket");
+ return -1;
+ }
+
+ ret = bind(fd, (struct sockaddr *)&laddr_un, sizeof(laddr_un));
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "can't bind unix=%s to socket",
+ laddr_un.sun_path);
+ closesocket(fd);
+ return -1;
+ }
+ qemu_socket_set_nonblock(fd);
+
+ dgram_dst = g_malloc(sizeof(raddr_un));
+ memcpy(dgram_dst, &raddr_un, sizeof(raddr_un));
+
+ info_str = g_strdup_printf("udp=%s:%s",
+ laddr_un.sun_path, raddr_un.sun_path);
+ break;
+ }
case SOCKET_ADDRESS_TYPE_FD: {
SocketAddress *sa;
SocketAddressType sa_type;
--
2.36.1
- Re: [RFC PATCH v3 03/11] qapi: net: introduce a way to bypass qemu_opts_parse_noisily(), (continued)
- [RFC PATCH v3 08/11] net: dgram: move mcast specific code from net_socket_fd_init_dgram(), Laurent Vivier, 2022/06/20
- [RFC PATCH v3 10/11] qemu-sockets: introduce socket_uri(), Laurent Vivier, 2022/06/20
- [RFC PATCH v3 07/11] net: dgram: make dgram_dst generic, Laurent Vivier, 2022/06/20
- [RFC PATCH v3 06/11] net: stream: add unix socket, Laurent Vivier, 2022/06/20
- [RFC PATCH v3 09/11] net: dgram: add unix socket,
Laurent Vivier <=
- [RFC PATCH v3 11/11] net: stream: move to QIO, Laurent Vivier, 2022/06/20
- Re: [RFC PATCH v3 00/11] qapi: net: add unix socket type support to netdev backend, Dr. David Alan Gilbert, 2022/06/20