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Tools: hv: Further refactor kvp_get_ip_address() 

In preparation for making kvp_get_ip_address() more generic, factor out
the code for handling IP addresses.

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 18:32:14 -07:00 committed by Greg Kroah-Hartman
parent 0ecaa1985e
commit af733015c9
1 changed files with 42 additions and 52 deletions
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94
tools/hv/hv_kvp_daemon.c
View File

@ -491,17 +491,50 @@ done:
return; return;
} }
static int kvp_process_ip_address(void *addrp,
int family, char *buffer,
int length, int *offset)
{
struct sockaddr_in *addr;
struct sockaddr_in6 *addr6;
int addr_length;
char tmp[50];
const char *str;
if (family == AF_INET) {
addr = (struct sockaddr_in *)addrp;
str = inet_ntop(family, &addr->sin_addr, tmp, 50);
addr_length = INET_ADDRSTRLEN;
} else {
addr6 = (struct sockaddr_in6 *)addrp;
str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
addr_length = INET6_ADDRSTRLEN;
}
if ((length - *offset) < addr_length + 1)
return 1;
if (str == NULL) {
strcpy(buffer, "inet_ntop failed\n");
return 1;
}
if (*offset == 0)
strcpy(buffer, tmp);
else
strcat(buffer, tmp);
strcat(buffer, ";");
*offset += strlen(str) + 1;
return 0;
}
static int static int
kvp_get_ip_address(int family, char *if_name, int op, kvp_get_ip_address(int family, char *if_name, int op,
void *out_buffer, int length) void *out_buffer, int length)
{ {
struct ifaddrs *ifap; struct ifaddrs *ifap;
struct ifaddrs *curp; struct ifaddrs *curp;
int ipv4_len = strlen("255.255.255.255") + 1;
int ipv6_len = strlen("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")+1;
int offset = 0; int offset = 0;
const char *str; const char *str;
char tmp[50];
int error = 0; int error = 0;
char *buffer; char *buffer;
struct hv_kvp_ipaddr_value *ip_buffer; struct hv_kvp_ipaddr_value *ip_buffer;
@ -556,55 +589,12 @@ kvp_get_ip_address(int family, char *if_name, int op,
continue; continue;
} }
if ((curp->ifa_addr->sa_family == AF_INET) && error = kvp_process_ip_address(curp->ifa_addr,
((family == AF_INET) || (family == 0))) { curp->ifa_addr->sa_family,
struct sockaddr_in *addr = buffer,
(struct sockaddr_in *) curp->ifa_addr; length, &offset);
if (error)
str = inet_ntop(AF_INET, &addr->sin_addr, tmp, 50); goto getaddr_done;
if (str == NULL) {
strcpy(buffer, "inet_ntop failed\n");
error = 1;
goto getaddr_done;
}
if (offset == 0)
strcpy(buffer, tmp);
else
strcat(buffer, tmp);
strcat(buffer, ";");
offset += strlen(str) + 1;
if ((length - offset) < (ipv4_len + 1))
goto getaddr_done;
} else if ((family == AF_INET6) || (family == 0)) {
/*
* We only support AF_INET and AF_INET6
* and the list of addresses is separated by a ";".
*/
struct sockaddr_in6 *addr =
(struct sockaddr_in6 *) curp->ifa_addr;
str = inet_ntop(AF_INET6,
&addr->sin6_addr.s6_addr,
tmp, 50);
if (str == NULL) {
strcpy(buffer, "inet_ntop failed\n");
error = 1;
goto getaddr_done;
}
if (offset == 0)
strcpy(buffer, tmp);
else
strcat(buffer, tmp);
strcat(buffer, ";");
offset += strlen(str) + 1;
if ((length - offset) < (ipv6_len + 1))
goto getaddr_done;
}
curp = curp->ifa_next; curp = curp->ifa_next;
} }