vnc: Hoist allocation of VncBasicInfo to callers
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 <eblake@redhat.com> Message-Id: <1445898903-12082-7-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
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parent
9fb081e0b9
commit
98481bfcd6
57
ui/vnc.c
57
ui/vnc.c
@ -156,10 +156,11 @@ char *vnc_socket_remote_addr(const char *format, int fd) {
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return addr_to_string(format, &sa, salen);
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}
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static VncBasicInfo *vnc_basic_info_get(struct sockaddr_storage *sa,
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socklen_t salen)
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static void vnc_init_basic_info(struct sockaddr_storage *sa,
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socklen_t salen,
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VncBasicInfo *info,
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Error **errp)
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{
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VncBasicInfo *info;
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char host[NI_MAXHOST];
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char serv[NI_MAXSERV];
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int err;
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@ -168,42 +169,44 @@ static VncBasicInfo *vnc_basic_info_get(struct sockaddr_storage *sa,
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host, sizeof(host),
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serv, sizeof(serv),
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NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
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VNC_DEBUG("Cannot resolve address %d: %s\n",
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err, gai_strerror(err));
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return NULL;
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error_setg(errp, "Cannot resolve address: %s",
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gai_strerror(err));
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return;
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}
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info = g_malloc0(sizeof(VncBasicInfo));
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info->host = g_strdup(host);
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info->service = g_strdup(serv);
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info->family = inet_netfamily(sa->ss_family);
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return info;
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}
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static VncBasicInfo *vnc_basic_info_get_from_server_addr(int fd)
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static void vnc_init_basic_info_from_server_addr(int fd, VncBasicInfo *info,
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Error **errp)
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{
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struct sockaddr_storage sa;
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socklen_t salen;
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salen = sizeof(sa);
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if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) {
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return NULL;
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error_setg_errno(errp, errno, "getsockname failed");
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return;
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}
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return vnc_basic_info_get(&sa, salen);
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vnc_init_basic_info(&sa, salen, info, errp);
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}
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static VncBasicInfo *vnc_basic_info_get_from_remote_addr(int fd)
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static void vnc_init_basic_info_from_remote_addr(int fd, VncBasicInfo *info,
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Error **errp)
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{
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struct sockaddr_storage sa;
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socklen_t salen;
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salen = sizeof(sa);
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if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) {
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return NULL;
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error_setg_errno(errp, errno, "getpeername failed");
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return;
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}
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return vnc_basic_info_get(&sa, salen);
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vnc_init_basic_info(&sa, salen, info, errp);
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}
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static const char *vnc_auth_name(VncDisplay *vd) {
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@ -256,15 +259,18 @@ static const char *vnc_auth_name(VncDisplay *vd) {
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static VncServerInfo *vnc_server_info_get(VncDisplay *vd)
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{
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VncServerInfo *info;
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VncBasicInfo *bi = vnc_basic_info_get_from_server_addr(vd->lsock);
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if (!bi) {
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return NULL;
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}
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Error *err = NULL;
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info = g_malloc(sizeof(*info));
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info->base = bi;
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info->base = g_malloc(sizeof(*info->base));
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vnc_init_basic_info_from_server_addr(vd->lsock, info->base, &err);
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info->has_auth = true;
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info->auth = g_strdup(vnc_auth_name(vd));
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if (err) {
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qapi_free_VncServerInfo(info);
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info = NULL;
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error_free(err);
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}
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return info;
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}
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@ -291,11 +297,16 @@ static void vnc_client_cache_auth(VncState *client)
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static void vnc_client_cache_addr(VncState *client)
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{
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VncBasicInfo *bi = vnc_basic_info_get_from_remote_addr(client->csock);
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Error *err = NULL;
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if (bi) {
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client->info = g_malloc0(sizeof(*client->info));
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client->info->base = bi;
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client->info = g_malloc0(sizeof(*client->info));
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client->info->base = g_malloc0(sizeof(*client->info->base));
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vnc_init_basic_info_from_remote_addr(client->csock, client->info->base,
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&err);
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if (err) {
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qapi_free_VncClientInfo(client->info);
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client->info = NULL;
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error_free(err);
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}
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}
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