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-rw-r--r--util/qemu-sockets.c154
1 files changed, 97 insertions, 57 deletions
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index da549b6908..eda99be8be 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -114,36 +114,78 @@ NetworkAddressFamily inet_netfamily(int family)
return NETWORK_ADDRESS_FAMILY_UNKNOWN;
}
-static int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
+/*
+ * Matrix we're trying to apply
+ *
+ * ipv4 ipv6 family
+ * - - PF_UNSPEC
+ * - f PF_INET
+ * - t PF_INET6
+ * f - PF_INET6
+ * f f <error>
+ * f t PF_INET6
+ * t - PF_INET
+ * t f PF_INET
+ * t t PF_INET6
+ *
+ * NB, this matrix is only about getting the neccessary results
+ * from getaddrinfo(). Some of the cases require further work
+ * after reading results from getaddrinfo in order to fully
+ * apply the logic the end user wants. eg with the last case
+ * ipv4=t + ipv6=t + PF_INET6, getaddrinfo alone can only
+ * guarantee the ipv6=t part of the request - we need more
+ * checks to provide ipv4=t part of the guarantee. This is
+ * outside scope of this method and not currently handled by
+ * callers at all.
+ */
+static int inet_ai_family_from_address(InetSocketAddress *addr,
+ Error **errp)
+{
+ if (addr->has_ipv6 && addr->has_ipv4 &&
+ !addr->ipv6 && !addr->ipv4) {
+ error_setg(errp, "Cannot disable IPv4 and IPv6 at same time");
+ return PF_UNSPEC;
+ }
+ if ((addr->has_ipv6 && addr->ipv6) || (addr->has_ipv4 && !addr->ipv4)) {
+ return PF_INET6;
+ }
+ if ((addr->has_ipv4 && addr->ipv4) || (addr->has_ipv6 && !addr->ipv6)) {
+ return PF_INET;
+ }
+ return PF_UNSPEC;
+}
+
+static int inet_listen_saddr(InetSocketAddress *saddr,
+ int port_offset,
+ bool update_addr,
+ Error **errp)
{
struct addrinfo ai,*res,*e;
- const char *addr;
char port[33];
char uaddr[INET6_ADDRSTRLEN+1];
char uport[33];
- int slisten, rc, to, port_min, port_max, p;
+ int slisten, rc, port_min, port_max, p;
+ Error *err = NULL;
memset(&ai,0, sizeof(ai));
ai.ai_flags = AI_PASSIVE;
- ai.ai_family = PF_UNSPEC;
+ ai.ai_family = inet_ai_family_from_address(saddr, &err);
ai.ai_socktype = SOCK_STREAM;
- if ((qemu_opt_get(opts, "host") == NULL)) {
+ if (err) {
+ error_propagate(errp, err);
+ return -1;
+ }
+
+ if (saddr->host == NULL) {
error_setg(errp, "host not specified");
return -1;
}
- if (qemu_opt_get(opts, "port") != NULL) {
- pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));
+ if (saddr->port != NULL) {
+ pstrcpy(port, sizeof(port), saddr->port);
} else {
port[0] = '\0';
}
- addr = qemu_opt_get(opts, "host");
-
- to = qemu_opt_get_number(opts, "to", 0);
- if (qemu_opt_get_bool(opts, "ipv4", 0))
- ai.ai_family = PF_INET;
- if (qemu_opt_get_bool(opts, "ipv6", 0))
- ai.ai_family = PF_INET6;
/* lookup */
if (port_offset) {
@@ -163,11 +205,11 @@ static int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
}
snprintf(port, sizeof(port), "%d", (int)baseport + port_offset);
}
- rc = getaddrinfo(strlen(addr) ? addr : NULL,
+ rc = getaddrinfo(strlen(saddr->host) ? saddr->host : NULL,
strlen(port) ? port : NULL, &ai, &res);
if (rc != 0) {
- error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
- gai_strerror(rc));
+ error_setg(errp, "address resolution failed for %s:%s: %s",
+ saddr->host, port, gai_strerror(rc));
return -1;
}
@@ -195,7 +237,7 @@ static int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
#endif
port_min = inet_getport(e);
- port_max = to ? to + port_offset : port_min;
+ port_max = saddr->has_to ? saddr->to + port_offset : port_min;
for (p = port_min; p <= port_max; p++) {
inet_setport(e, p);
if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {
@@ -219,13 +261,15 @@ listen:
freeaddrinfo(res);
return -1;
}
- qemu_opt_set(opts, "host", uaddr, &error_abort);
- qemu_opt_set_number(opts, "port", inet_getport(e) - port_offset,
- &error_abort);
- qemu_opt_set_bool(opts, "ipv6", e->ai_family == PF_INET6,
- &error_abort);
- qemu_opt_set_bool(opts, "ipv4", e->ai_family != PF_INET6,
- &error_abort);
+ if (update_addr) {
+ g_free(saddr->host);
+ saddr->host = g_strdup(uaddr);
+ g_free(saddr->port);
+ saddr->port = g_strdup_printf("%d",
+ inet_getport(e) - port_offset);
+ saddr->has_ipv6 = saddr->ipv6 = e->ai_family == PF_INET6;
+ saddr->has_ipv4 = saddr->ipv4 = e->ai_family != PF_INET6;
+ }
freeaddrinfo(res);
return slisten;
}
@@ -617,32 +661,28 @@ static void inet_addr_to_opts(QemuOpts *opts, const InetSocketAddress *addr)
int inet_listen(const char *str, char *ostr, int olen,
int socktype, int port_offset, Error **errp)
{
- QemuOpts *opts;
char *optstr;
int sock = -1;
InetSocketAddress *addr;
addr = inet_parse(str, errp);
if (addr != NULL) {
- opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
- inet_addr_to_opts(opts, addr);
- qapi_free_InetSocketAddress(addr);
- sock = inet_listen_opts(opts, port_offset, errp);
+ sock = inet_listen_saddr(addr, port_offset, true, errp);
if (sock != -1 && ostr) {
optstr = strchr(str, ',');
- if (qemu_opt_get_bool(opts, "ipv6", 0)) {
+ if (addr->ipv6) {
snprintf(ostr, olen, "[%s]:%s%s",
- qemu_opt_get(opts, "host"),
- qemu_opt_get(opts, "port"),
+ addr->host,
+ addr->port,
optstr ? optstr : "");
} else {
snprintf(ostr, olen, "%s:%s%s",
- qemu_opt_get(opts, "host"),
- qemu_opt_get(opts, "port"),
+ addr->host,
+ addr->port,
optstr ? optstr : "");
}
}
- qemu_opts_del(opts);
+ qapi_free_InetSocketAddress(addr);
}
return sock;
}
@@ -708,10 +748,11 @@ int inet_nonblocking_connect(const char *str,
#ifndef _WIN32
-static int unix_listen_opts(QemuOpts *opts, Error **errp)
+static int unix_listen_saddr(UnixSocketAddress *saddr,
+ bool update_addr,
+ Error **errp)
{
struct sockaddr_un un;
- const char *path = qemu_opt_get(opts, "path");
int sock, fd;
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
@@ -722,8 +763,8 @@ static int unix_listen_opts(QemuOpts *opts, Error **errp)
memset(&un, 0, sizeof(un));
un.sun_family = AF_UNIX;
- if (path && strlen(path)) {
- snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
+ if (saddr->path && strlen(saddr->path)) {
+ snprintf(un.sun_path, sizeof(un.sun_path), "%s", saddr->path);
} else {
const char *tmpdir = getenv("TMPDIR");
tmpdir = tmpdir ? tmpdir : "/tmp";
@@ -748,7 +789,10 @@ static int unix_listen_opts(QemuOpts *opts, Error **errp)
goto err;
}
close(fd);
- qemu_opt_set(opts, "path", un.sun_path, &error_abort);
+ if (update_addr) {
+ g_free(saddr->path);
+ saddr->path = g_strdup(un.sun_path);
+ }
}
if (unlink(un.sun_path) < 0 && errno != ENOENT) {
@@ -832,7 +876,9 @@ static int unix_connect_opts(QemuOpts *opts, Error **errp,
#else
-static int unix_listen_opts(QemuOpts *opts, Error **errp)
+static int unix_listen_saddr(UnixSocketAddress *saddr,
+ bool update_addr,
+ Error **errp)
{
error_setg(errp, "unix sockets are not available on windows");
errno = ENOTSUP;
@@ -851,11 +897,11 @@ static int unix_connect_opts(QemuOpts *opts, Error **errp,
/* compatibility wrapper */
int unix_listen(const char *str, char *ostr, int olen, Error **errp)
{
- QemuOpts *opts;
char *path, *optstr;
int sock, len;
+ UnixSocketAddress *saddr;
- opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
+ saddr = g_new0(UnixSocketAddress, 1);
optstr = strchr(str, ',');
if (optstr) {
@@ -863,18 +909,17 @@ int unix_listen(const char *str, char *ostr, int olen, Error **errp)
if (len) {
path = g_malloc(len+1);
snprintf(path, len+1, "%.*s", len, str);
- qemu_opt_set(opts, "path", path, &error_abort);
- g_free(path);
+ saddr->path = path;
}
} else {
- qemu_opt_set(opts, "path", str, &error_abort);
+ saddr->path = g_strdup(str);
}
- sock = unix_listen_opts(opts, errp);
+ sock = unix_listen_saddr(saddr, true, errp);
if (sock != -1 && ostr)
- snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
- qemu_opts_del(opts);
+ snprintf(ostr, olen, "%s%s", saddr->path, optstr ? optstr : "");
+ qapi_free_UnixSocketAddress(saddr);
return sock;
}
@@ -979,19 +1024,15 @@ int socket_connect(SocketAddress *addr, Error **errp,
int socket_listen(SocketAddress *addr, Error **errp)
{
- QemuOpts *opts;
int fd;
- opts = qemu_opts_create(&socket_optslist, NULL, 0, &error_abort);
switch (addr->type) {
case SOCKET_ADDRESS_KIND_INET:
- inet_addr_to_opts(opts, addr->u.inet);
- fd = inet_listen_opts(opts, 0, errp);
+ fd = inet_listen_saddr(addr->u.inet, 0, false, errp);
break;
case SOCKET_ADDRESS_KIND_UNIX:
- qemu_opt_set(opts, "path", addr->u.q_unix->path, &error_abort);
- fd = unix_listen_opts(opts, errp);
+ fd = unix_listen_saddr(addr->u.q_unix, false, errp);
break;
case SOCKET_ADDRESS_KIND_FD:
@@ -1001,7 +1042,6 @@ int socket_listen(SocketAddress *addr, Error **errp)
default:
abort();
}
- qemu_opts_del(opts);
return fd;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 07:33:18 +0000