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[Qemu-devel] [PATCH RFC v3 02/20] vnc: hoist allocation of VncBasicInfo
From: |
Eric Blake |
Subject: |
[Qemu-devel] [PATCH RFC v3 02/20] vnc: hoist allocation of VncBasicInfo to callers |
Date: |
Tue, 18 Aug 2015 07:19:44 -0700 |
A future qapi patch will rework generated structs with a base
class to be unboxed. In preparation for that, change the code
that allocates then populates an info struct to instead merely
populate the fields of an info field passed in as a parameter.
Add rudimentary Error handling for cases where the old code
returned NULL; but as before, callers merely ignore errors for
now.
Signed-off-by: Eric Blake <address@hidden>
---
ui/vnc.c | 52 ++++++++++++++++++++++++++++------------------------
1 file changed, 28 insertions(+), 24 deletions(-)
diff --git a/ui/vnc.c b/ui/vnc.c
index e26973a..273161c 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -153,10 +153,11 @@ char *vnc_socket_remote_addr(const char *format, int fd) {
return addr_to_string(format, &sa, salen);
}
-static VncBasicInfo *vnc_basic_info_get(struct sockaddr_storage *sa,
- socklen_t salen)
+static void vnc_basic_info_get(struct sockaddr_storage *sa,
+ socklen_t salen,
+ VncBasicInfo *info,
+ Error **errp)
{
- VncBasicInfo *info;
char host[NI_MAXHOST];
char serv[NI_MAXSERV];
int err;
@@ -165,42 +166,44 @@ static VncBasicInfo *vnc_basic_info_get(struct
sockaddr_storage *sa,
host, sizeof(host),
serv, sizeof(serv),
NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
- VNC_DEBUG("Cannot resolve address %d: %s\n",
- err, gai_strerror(err));
- return NULL;
+ error_setg(errp, "Cannot resolve address %d: %s",
+ err, gai_strerror(err));
+ return;
}
- info = g_malloc0(sizeof(VncBasicInfo));
info->host = g_strdup(host);
info->service = g_strdup(serv);
info->family = inet_netfamily(sa->ss_family);
- return info;
}
-static VncBasicInfo *vnc_basic_info_get_from_server_addr(int fd)
+static void vnc_basic_info_get_from_server_addr(int fd, VncBasicInfo *info,
+ Error **errp)
{
struct sockaddr_storage sa;
socklen_t salen;
salen = sizeof(sa);
if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) {
- return NULL;
+ error_setg_errno(errp, errno, "getsockname failed");
+ return;
}
- return vnc_basic_info_get(&sa, salen);
+ vnc_basic_info_get(&sa, salen, info, errp);
}
-static VncBasicInfo *vnc_basic_info_get_from_remote_addr(int fd)
+static void vnc_basic_info_get_from_remote_addr(int fd, VncBasicInfo *info,
+ Error **errp)
{
struct sockaddr_storage sa;
socklen_t salen;
salen = sizeof(sa);
if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) {
- return NULL;
+ error_setg_errno(errp, errno, "getpeername failed");
+ return;
}
- return vnc_basic_info_get(&sa, salen);
+ vnc_basic_info_get(&sa, salen, info, errp);
}
static const char *vnc_auth_name(VncDisplay *vd) {
@@ -257,13 +260,10 @@ static const char *vnc_auth_name(VncDisplay *vd) {
static VncServerInfo *vnc_server_info_get(VncDisplay *vd)
{
VncServerInfo *info;
- VncBasicInfo *bi = vnc_basic_info_get_from_server_addr(vd->lsock);
- if (!bi) {
- return NULL;
- }
info = g_malloc(sizeof(*info));
- info->base = bi;
+ info->base = g_malloc(sizeof(*info->base));
+ vnc_basic_info_get_from_server_addr(vd->lsock, info->base, NULL);
info->has_auth = true;
info->auth = g_strdup(vnc_auth_name(vd));
return info;
@@ -293,11 +293,15 @@ static void vnc_client_cache_auth(VncState *client)
static void vnc_client_cache_addr(VncState *client)
{
- VncBasicInfo *bi = vnc_basic_info_get_from_remote_addr(client->csock);
-
- if (bi) {
- client->info = g_malloc0(sizeof(*client->info));
- client->info->base = bi;
+ Error *err = NULL;
+ client->info = g_malloc0(sizeof(*client->info));
+ client->info->base = g_malloc0(sizeof(*client->info->base));
+ vnc_basic_info_get_from_remote_addr(client->csock, client->info->base,
+ &err);
+ if (err) {
+ qapi_free_VncClientInfo(client->info);
+ client->info = NULL;
+ error_free(err);
}
}
--
2.4.3
- [Qemu-devel] [PATCH RFC v3 05/20] qapi: Test use of 'number' within alternates, (continued)
- [Qemu-devel] [PATCH RFC v3 05/20] qapi: Test use of 'number' within alternates, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 01/20] qapi: use 'type' in generated C code to match QMP union wire form, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 06/20] qapi: Simplify visiting of alternate types, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 07/20] qapi: Fix alternates that accept 'number' but not 'int', Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 09/20] qapi: Use consistent generated code patterns, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 08/20] qapi: Don't pass pre-existing error to later call, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 10/20] qapi: Add tests for empty unions, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 11/20] qapi: Rework deallocation of partial struct, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 04/20] qapi-visit: Remove redundant functions for flat union base, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 03/20] qapi: Unbox base members, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 02/20] vnc: hoist allocation of VncBasicInfo to callers,
Eric Blake <=
- [Qemu-devel] [PATCH RFC v3 15/20] qapi: Remove dead visitor code, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 20/20] qapi: Support boxed unions, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 18/20] qapi: Plumb in 'box' to qapi generator lower levels, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 16/20] qapi: Document visitor interfaces, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 13/20] qapi: Forbid empty unions and useless alternates, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 14/20] qapi: Drop useless 'data' member of unions, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 19/20] qapi: Implement boxed structs for commands/events, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 17/20] qapi: Change visit_type_XXX() to no longer return partial objects, Eric Blake, 2015/08/18
- [Qemu-devel] [PATCH RFC v3 12/20] qapi: Avoid use of 'data' member of qapi unions, Eric Blake, 2015/08/18