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Tools: hv: Gather ipv[4,6] gateway information 

Gather information on the default gateways - ipv4/ipv6.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2012-08-16 18:32:18 -07:00 committed by Greg Kroah-Hartman
parent 6a60a6a8ea
commit 4a52c4af48
1 changed files with 68 additions and 0 deletions
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68
tools/hv/hv_kvp_daemon.c
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@ -491,6 +491,68 @@ done:
return;
}
static void kvp_process_ipconfig_file(char *cmd,
char *config_buf, int len,
int element_size, int offset)
{
char buf[256];
char *p;
char *x;
FILE *file;
/*
* First execute the command.
*/
file = popen(cmd, "r");
if (file == NULL)
return;
if (offset == 0)
memset(config_buf, 0, len);
while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
if ((len - strlen(config_buf)) < (element_size + 1))
break;
x = strchr(p, '\n');
*x = '\0';
strcat(config_buf, p);
strcat(config_buf, ";");
}
pclose(file);
}
static void kvp_get_ipconfig_info(char *if_name,
struct hv_kvp_ipaddr_value *buffer)
{
char cmd[512];
/*
* Get the address of default gateway (ipv4).
*/
sprintf(cmd, "%s %s", "ip route show dev", if_name);
strcat(cmd, " | awk '/default/ {print $3 }'");
/*
* Execute the command to gather gateway info.
*/
kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
(MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
/*
* Get the address of default gateway (ipv6).
*/
sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name);
strcat(cmd, " | awk '/default/ {print $3 }'");
/*
* Execute the command to gather gateway info (ipv6).
*/
kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
(MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
}
static unsigned int hweight32(unsigned int *w)
{
unsigned int res = *w - ((*w >> 1) & 0x55555555);
@ -650,6 +712,12 @@ kvp_get_ip_address(int family, char *if_name, int op,
strcat((char *)ip_buffer->sub_net, ";");
sn_offset += strlen(sn_str) + 1;
}
/*
* Collect other ip related configuration info.
*/
kvp_get_ipconfig_info(if_name, ip_buffer);
}
gather_ipaddr: