/**
* Create a non-blocking socket and connect it to an address.
* Calls the callback function with fd in case of success or -1 in case of
* error.
*
* @str: address string
* @callback: callback function that is called when connect completes,
* cannot be NULL.
* @opaque: opaque for callback function
* @errp: set in case of an error
*
* Returns: -1 on immediate error, file descriptor on success.
**/
int inet_nonblocking_connect(const char *str,
NonBlockingConnectHandler *callback,
void *opaque, Error **errp)
{
QemuOpts *opts;
int sock = -1;
InetSocketAddress *addr;
g_assert(callback != NULL);
addr = inet_parse(str, errp);
if (addr != NULL) {
opts = qemu_opts_create_nofail(&dummy_opts);
inet_addr_to_opts(opts, addr);
qapi_free_InetSocketAddress(addr);
sock = inet_connect_opts(opts, errp, callback, opaque);
qemu_opts_del(opts);
}
return sock;
}
/* compatibility wrapper */
InetSocketAddress *inet_parse(const char *str, Error **errp)
{
InetSocketAddress *addr;
const char *optstr, *h;
char host[65];
char port[33];
int to;
int pos;
addr = g_new0(InetSocketAddress, 1);
/* parse address */
if (str[0] == ':') {
/* no host given */
host[0] = '\0';
if (sscanf(str, ":%32[^,]%n", port, &pos) != 1) {
error_setg(errp, "error parsing port in address '%s'", str);
goto fail;
}
} else if (str[0] == '[') {
/* IPv6 addr */
if (sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos) != 2) {
error_setg(errp, "error parsing IPv6 address '%s'", str);
goto fail;
}
addr->ipv6 = addr->has_ipv6 = true;
} else {
/* hostname or IPv4 addr */
if (sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos) != 2) {
error_setg(errp, "error parsing address '%s'", str);
goto fail;
}
if (host[strspn(host, "0123456789.")] == '\0') {
addr->ipv4 = addr->has_ipv4 = true;
}
}
addr->host = g_strdup(host);
addr->port = g_strdup(port);
/* parse options */
optstr = str + pos;
h = strstr(optstr, ",to=");
if (h) {
h += 4;
if (sscanf(h, "%d%n", &to, &pos) != 1 ||
(h[pos] != '\0' && h[pos] != ',')) {
error_setg(errp, "error parsing to= argument");
goto fail;
}
addr->has_to = true;
addr->to = to;
}
if (strstr(optstr, ",ipv4")) {
addr->ipv4 = addr->has_ipv4 = true;
}
if (strstr(optstr, ",ipv6")) {
addr->ipv6 = addr->has_ipv6 = true;
}
return addr;
fail:
qapi_free_InetSocketAddress(addr);
return NULL;
}
static void nbd_parse_filename(const char *filename, QDict *options,
Error **errp)
{
char *file;
char *export_name;
const char *host_spec;
const char *unixpath;
if (qdict_haskey(options, "host")
|| qdict_haskey(options, "port")
|| qdict_haskey(options, "path"))
{
error_setg(errp, "host/port/path and a file name may not be specified "
"at the same time");
return;
}
if (strstr(filename, "://")) {
int ret = nbd_parse_uri(filename, options);
if (ret < 0) {
error_setg(errp, "No valid URL specified");
}
return;
}
file = g_strdup(filename);
export_name = strstr(file, EN_OPTSTR);
if (export_name) {
if (export_name[strlen(EN_OPTSTR)] == 0) {
goto out;
}
export_name[0] = 0; /* truncate 'file' */
export_name += strlen(EN_OPTSTR);
qdict_put(options, "export", qstring_from_str(export_name));
}
/* extract the host_spec - fail if it's not nbd:... */
if (!strstart(file, "nbd:", &host_spec)) {
error_setg(errp, "File name string for NBD must start with 'nbd:'");
goto out;
}
if (!*host_spec) {
goto out;
}
/* are we a UNIX or TCP socket? */
if (strstart(host_spec, "unix:", &unixpath)) {
qdict_put(options, "path", qstring_from_str(unixpath));
} else {
InetSocketAddress *addr = NULL;
addr = inet_parse(host_spec, errp);
if (!addr) {
goto out;
}
qdict_put(options, "host", qstring_from_str(addr->host));
qdict_put(options, "port", qstring_from_str(addr->port));
qapi_free_InetSocketAddress(addr);
}
out:
g_free(file);
}
