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[Qemu-devel] [PATCH v10 06/25] vnc: Hoist allocation of VncBasicInfo to
From: |
Eric Blake |
Subject: |
[Qemu-devel] [PATCH v10 06/25] vnc: Hoist allocation of VncBasicInfo to callers |
Date: |
Thu, 22 Oct 2015 23:09:39 -0600 |
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
(renaming vnc_basic_info_get* to vnc_init_basic_info*). Add
rudimentary Error handling at the lowest levels for cases
where the old code returned NULL; but rather than plumb Error
all the way through the stack, the callers drop the error and
return NULL as before.
Signed-off-by: Eric Blake <address@hidden>
---
v10: improve commit message (including a retitle), rename
functions, tweak error message, don't change semantics of
vnc_server_info_get()
v9: (no v6-8): hoist from v5 33/46
---
ui/vnc.c | 57 ++++++++++++++++++++++++++++++++++-----------------------
1 file changed, 34 insertions(+), 23 deletions(-)
diff --git a/ui/vnc.c b/ui/vnc.c
index faff054..502a10a 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -156,10 +156,11 @@ 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_init_basic_info(struct sockaddr_storage *sa,
+ socklen_t salen,
+ VncBasicInfo *info,
+ Error **errp)
{
- VncBasicInfo *info;
char host[NI_MAXHOST];
char serv[NI_MAXSERV];
int err;
@@ -168,42 +169,44 @@ 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: %s",
+ 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_init_basic_info_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_init_basic_info(&sa, salen, info, errp);
}
-static VncBasicInfo *vnc_basic_info_get_from_remote_addr(int fd)
+static void vnc_init_basic_info_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_init_basic_info(&sa, salen, info, errp);
}
static const char *vnc_auth_name(VncDisplay *vd) {
@@ -256,15 +259,18 @@ 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;
- }
+ Error *err = NULL;
info = g_malloc(sizeof(*info));
- info->base = bi;
+ info->base = g_malloc(sizeof(*info->base));
+ vnc_init_basic_info_from_server_addr(vd->lsock, info->base, &err);
info->has_auth = true;
info->auth = g_strdup(vnc_auth_name(vd));
+ if (err) {
+ qapi_free_VncServerInfo(info);
+ info = NULL;
+ error_free(err);
+ }
return info;
}
@@ -291,11 +297,16 @@ 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);
+ Error *err = NULL;
- if (bi) {
- client->info = g_malloc0(sizeof(*client->info));
- client->info->base = bi;
+ client->info = g_malloc0(sizeof(*client->info));
+ client->info->base = g_malloc0(sizeof(*client->info->base));
+ vnc_init_basic_info_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 v10 02/25] qapi: More idiomatic string operations, Eric Blake, 2015/10/23
[Qemu-devel] [PATCH v10 03/25] qapi: More robust conditions for when labels are needed, Eric Blake, 2015/10/23
[Qemu-devel] [PATCH v10 06/25] vnc: Hoist allocation of VncBasicInfo to callers,
Eric Blake <=
[Qemu-devel] [PATCH v10 08/25] qapi-types: Refactor base fields output, Eric Blake, 2015/10/23
[Qemu-devel] [PATCH v10 01/25] tests/qapi-schema: Test for reserved names, empty struct, Eric Blake, 2015/10/23
[Qemu-devel] [PATCH v10 04/25] qapi: Reserve '*List' type names for list types, Eric Blake, 2015/10/23
[Qemu-devel] [PATCH v10 13/25] qapi-visit: Convert to new qapi union layout, Eric Blake, 2015/10/23