On Wed, Jun 12, 2024 at 7:36 AM Dehan Meng <dem...@redhat.com> wrote:
> The Route information of the Linux VM needs to be used
> by administrators and users when debugging network problems
> and troubleshooting.
>
> Signed-off-by: Dehan Meng <dem...@redhat.com>
> ---
> qga/commands-posix.c | 73 ++++++++++++++++++++++++++++++++++++++++++++
> qga/commands-win32.c | 6 ++++
> qga/qapi-schema.json | 68 +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 147 insertions(+)
>
> diff --git a/qga/commands-posix.c b/qga/commands-posix.c
> index 6169bbf7a0..ffae88ca69 100644
> --- a/qga/commands-posix.c
> +++ b/qga/commands-posix.c
> @@ -2747,6 +2747,73 @@ GuestCpuStatsList *qmp_guest_get_cpustats(Error
> **errp)
> return head;
> }
>
> +char *hexToIPAddress(unsigned int hexValue, char ipAddress[16]);
> +char *hexToIPAddress(unsigned int hexValue, char ipAddress[16])
> +{
> + unsigned int byte1 = (hexValue >> 24) & 0xFF;
> + unsigned int byte2 = (hexValue >> 16) & 0xFF;
> + unsigned int byte3 = (hexValue >> 8) & 0xFF;
> + unsigned int byte4 = hexValue & 0xFF;
> +
> + snprintf(ipAddress, 16, "%u.%u.%u.%u", byte4, byte3, byte2, byte1);
> +
> + return ipAddress;
> +}
> +
> +GuestNetworkRouteStatList *qmp_guest_network_get_route(Error **errp)
> +{
> + GuestNetworkRouteStatList *head = NULL, **tail = &head;
> + const char *routeFile = "/proc/net/route";
> + FILE *fp;
> + size_t n;
> + char *line = NULL;
> +
> + fp = fopen(routeFile, "r");
> + if (fp == NULL) {
> + error_setg_errno(errp, errno, "open(\"%s\")", routeFile);
> + return NULL;
> + }
> +
> + while (getline(&line, &n, fp) != -1) {
> + GuestNetworkRouteStat *networkroute;
> + int i;
> + char Iface[16];
> + unsigned int Destination, Gateway, Mask, Flags;
> + int RefCnt, Use, Metric, MTU, Window, IRTT;
> +
> + i = (sscanf(line, "%s %X %X %x %d %d %d %X %d %d %d",
> + Iface, &Destination, &Gateway, &Flags, &RefCnt,
> + &Use, &Metric, &Mask, &MTU, &Window, &IRTT) == 11);
> + if (i == EOF) {
> + continue;
> + }
> +
> + networkroute = g_new0(GuestNetworkRouteStat, 1);
> +
> + char DestAddress[16];
> + char GateAddress[16];
> + char MaskAddress[16];
> +
> + networkroute->iface = g_strdup(Iface);
> + networkroute->destination = g_strdup(hexToIPAddress(Destination,
> DestAddress));
> + networkroute->gateway = g_strdup(hexToIPAddress(Gateway,
> GateAddress));
> + networkroute->mask = g_strdup(hexToIPAddress(Mask, MaskAddress));
> + networkroute->metric = Metric;
> + networkroute->flags = Flags;
> + networkroute->refcnt = RefCnt;
> + networkroute->use = Use;
> + networkroute->mtu = MTU;
> + networkroute->window = Window;
> + networkroute->irtt = IRTT;
> +
> + QAPI_LIST_APPEND(tail, networkroute);
> + }
> +
> + free(line);
> + fclose(fp);
> + return head;
> +}
> +
> #else /* defined(__linux__) */
>
> void qmp_guest_suspend_disk(Error **errp)
> @@ -3118,6 +3185,12 @@ GuestCpuStatsList *qmp_guest_get_cpustats(Error
> **errp)
> return NULL;
> }
>
> +GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp)
> +{
> + error_setg(errp, QERR_UNSUPPORTED);
> + return NULL;
> +}
> +
> #endif /* CONFIG_FSFREEZE */
>
> #if !defined(CONFIG_FSTRIM)
> diff --git a/qga/commands-win32.c b/qga/commands-win32.c
> index 697c65507c..e62c04800a 100644
> --- a/qga/commands-win32.c
> +++ b/qga/commands-win32.c
> @@ -2522,3 +2522,9 @@ GuestCpuStatsList *qmp_guest_get_cpustats(Error
> **errp)
> error_setg(errp, QERR_UNSUPPORTED);
> return NULL;
> }
> +
> +GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp)
> +{
> + error_setg(errp, QERR_UNSUPPORTED);
> + return NULL;
> +}
> diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
> index 876e2a8ea8..195f6cd4e7 100644
> --- a/qga/qapi-schema.json
> +++ b/qga/qapi-schema.json
> @@ -1789,3 +1789,71 @@
> { 'command': 'guest-get-cpustats',
> 'returns': ['GuestCpuStats']
> }
> +
> +##
> +# @GuestNetworkRouteStat:
> +#
> +# Route information, currently, only linux supported.
> +#
> +# @iface: The destination network or host's egress network interface in
> the routing table
> +#
> +# @destination: The IP address of the target network or host, The final
> destination of the packet
> +#
> +# @gateway: The IP address of the next hop router
> +#
> +# @mask: Subnet Mask
> +#
> +# @metric: Route metricls
> +#
> +# @flags: Route flags (not for windows)
> +#
> +# @irtt: Initial round-trip delay (not for windows)
> +#
> +# @refcnt: The route's reference count (not for windows)
> +#
> +# @use: Route usage count (not for windows)
> +#
> +# @window: TCP window size, used for flow control (not for windows)
> +#
> +# @mtu: Data link layer maximum packet size (not for windows)
> +#
> +# Since: 9.1
> +
> +##
> +{ 'struct': 'GuestNetworkRouteStat',
> + 'data': {'iface': 'str',
> + 'destination': 'str',
> + 'gateway': 'str',
> + 'metric': 'int',
> + 'mask': 'str',
> + '*irtt': 'int',
> + '*flags': 'uint64',
> + '*refcnt': 'int',
> + '*use': 'int',
> + '*window': 'int',
> + '*mtu': 'int'
> + }}
> +
> +##
> +# @GuestNetworkRoute:
> +#
> +# Get route information of system.
> +#
> +# @routes: A list of network route information.
> +#
> +# Since: 9.1
> +##
> +{ 'struct': 'GuestNetworkRoute',
> + 'data': { 'routes': ['GuestNetworkRouteStat'] } }
>
This struct is unused anymore, so remove it and
rename GuestNetworkRouteStat to GuestNetworkRoute.
> +
> +##
> +# @guest-network-get-route:
> +#
> +# Retrieve information about route of network.
> +# Returns: List of route info of guest.
> +#
> +# Since: 9.1
> +##
> +{ 'command': 'guest-network-get-route',
> + 'returns': ['GuestNetworkRouteStat']
> +}
> --
> 2.40.1
>
>
