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Re: [PATCH v12 10/17] net: dgram: make dgram_dst generic
- To: Laurent Vivier <lvivier@xxxxxxxxxx>, qemu-devel@xxxxxxxxxx
- From: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
- Date: Thu, 20 Oct 2022 13:17:49 +0200
- Cc: Daniel P. Berrangé <berrange@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Eric Blake <eblake@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Greg Kurz <groug@xxxxxxxx>, Jason Wang <jasowang@xxxxxxxxxx>, Anthony Perard <anthony.perard@xxxxxxxxxx>, Thomas Huth <thuth@xxxxxxxxxx>, David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>, "Dr. David Alan Gilbert" <dgilbert@xxxxxxxxxx>, Paul Durrant <paul@xxxxxxx>, Stefan Weil <sw@xxxxxxxxxxx>, Markus Armbruster <armbru@xxxxxxxxxx>, Stefano Brivio <sbrivio@xxxxxxxxxx>
- Delivery-date: Thu, 20 Oct 2022 11:18:00 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 20/10/22 11:16, Laurent Vivier wrote:
dgram_dst is a sockaddr_in structure. To be able to use it with
unix socket, use a pointer to a generic sockaddr structure.
Rename it dest_addr, and store socket length in dest_len.
Signed-off-by: Laurent Vivier <lvivier@xxxxxxxxxx>
Reviewed-by: Stefano Brivio <sbrivio@xxxxxxxxxx>
Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
---
net/dgram.c | 82 ++++++++++++++++++++++++++++++++++-------------------
1 file changed, 53 insertions(+), 29 deletions(-)
static NetClientInfo net_dgram_socket_info = {
@@ -260,7 +263,7 @@ static NetDgramState *net_dgram_fd_init(NetClientState
*peer,
SocketAddress *mcast,
Error **errp)
{
- struct sockaddr_in saddr;
+ struct sockaddr_in *saddr = NULL;
Preferrably g_autofree.
int newfd;
NetClientState *nc;
NetDgramState *s;
@@ -275,31 +278,32 @@ static NetDgramState *net_dgram_fd_init(NetClientState
*peer,
qapi_free_SocketAddress(sa);
/*
- * fd passed: multicast: "learn" dgram_dst address from bound address and
+ * fd passed: multicast: "learn" dest_addr address from bound address and
* save it. Because this may be "shared" socket from a "master" process,
* datagrams would be recv() by ONLY ONE process: we must "clone" this
* dgram socket --jjo
*/
if (is_fd && mcast != NULL) {
- if (convert_host_port(&saddr, mcast->u.inet.host,
- mcast->u.inet.port, errp) < 0) {
+ saddr = g_new(struct sockaddr_in, 1);
+
+ if (convert_host_port(saddr, mcast->u.inet.host,
mcast->u.inet.port,
+ errp) < 0) {
goto err;
}
/* must be bound */
- if (saddr.sin_addr.s_addr == 0) {
+ if (saddr->sin_addr.s_addr == 0) {
error_setg(errp, "can't setup multicast destination address");
goto err;
}
/* clone dgram socket */
- newfd = net_dgram_mcast_create(&saddr, NULL, errp);
+ newfd = net_dgram_mcast_create(saddr, NULL, errp);
if (newfd < 0) {
goto err;
}
/* clone newfd to fd, close newfd */
dup2(newfd, fd);
close(newfd);
-
}
nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name);
@@ -311,21 +315,20 @@ static NetDgramState *net_dgram_fd_init(NetClientState
*peer,
net_dgram_read_poll(s, true);
/* mcast: save bound address as dst */
- if (is_fd && mcast != NULL) {
- s->dgram_dst = saddr;
+ if (saddr) {
+ g_assert(s->dest_addr == NULL);
+ s->dest_addr = (struct sockaddr *)saddr;
+ s->dest_len = sizeof(*saddr);
qemu_set_info_str(nc, "fd=%d (cloned mcast=%s:%d)", fd,
- inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
+ inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port));
} else {
- if (sa_type == SOCKET_ADDRESS_TYPE_UNIX) {
- s->dgram_dst.sin_family = AF_UNIX;
- }
-
qemu_set_info_str(nc, "fd=%d %s", fd, SocketAddressType_str(sa_type));
}
return s;
err:
+ g_free(saddr);
closesocket(fd);
return NULL;
}
@@ -339,21 +342,24 @@ static int net_dgram_mcast_init(NetClientState *peer,
{
NetDgramState *s;
int fd, ret;
- struct sockaddr_in saddr;
+ struct sockaddr_in *saddr;
Preferrably:
g_autofree struct sockaddr_in *saddr = NULL.
if (remote->type != SOCKET_ADDRESS_TYPE_INET) {
error_setg(errp, "multicast only support inet type");
return -1;
}
- if (convert_host_port(&saddr, remote->u.inet.host, remote->u.inet.port,
+ saddr = g_new(struct sockaddr_in, 1);
+ if (convert_host_port(saddr, remote->u.inet.host, remote->u.inet.port,
errp) < 0) {
+ g_free(saddr);
return -1;
}
if (!local) {
- fd = net_dgram_mcast_create(&saddr, NULL, errp);
+ fd = net_dgram_mcast_create(saddr, NULL, errp);
if (fd < 0) {
+ g_free(saddr);
return -1;
}
} else {
@@ -362,13 +368,15 @@ static int net_dgram_mcast_init(NetClientState *peer,
struct in_addr localaddr;
if (inet_aton(local->u.inet.host, &localaddr) == 0) {
+ g_free(saddr);
error_setg(errp, "localaddr '%s' is not a valid IPv4 address",
local->u.inet.host);
return -1;
}
- fd = net_dgram_mcast_create(&saddr, &localaddr, errp);
+ fd = net_dgram_mcast_create(saddr, &localaddr, errp);
if (fd < 0) {
+ g_free(saddr);
return -1;
}
break;
@@ -376,16 +384,19 @@ static int net_dgram_mcast_init(NetClientState *peer,
case SOCKET_ADDRESS_TYPE_FD:
fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp);
if (fd == -1) {
+ g_free(saddr);
return -1;
}
ret = qemu_socket_try_set_nonblock(fd);
if (ret < 0) {
+ g_free(saddr);
error_setg_errno(errp, -ret, "%s: Can't use file descriptor
%d",
name, fd);
return -1;
}
break;
default:
+ g_free(saddr);
error_setg(errp, "only support inet or fd type for local");
return -1;
}
@@ -395,13 +406,17 @@ static int net_dgram_mcast_init(NetClientState *peer,
local->type == SOCKET_ADDRESS_TYPE_FD,
remote, errp);
if (!s) {
+ g_free(saddr);
return -1;
}
- s->dgram_dst = saddr;
+ g_assert(s->dest_addr == NULL);
+ s->dest_addr = (struct sockaddr *)saddr;
+ s->dest_len = sizeof(*saddr);
+
+ qemu_set_info_str(&s->nc, "mcast=%s:%d", inet_ntoa(saddr->sin_addr),
+ ntohs(saddr->sin_port));
- qemu_set_info_str(&s->nc, "mcast=%s:%d", inet_ntoa(saddr.sin_addr),
- ntohs(saddr.sin_port));
return 0;
}
Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
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