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net/getifaddrs: Support multiple IPv6 addresses for getifaddrs

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Signed-off-by: meijian <meijian@xiaomi.com>
This commit is contained in:
meijian 2024-10-18 14:11:47 +08:00 • committed by Xiang Xiao
parent f6cfcfa39f
commit 884a6803d6
1 changed files with 78 additions and 0 deletions
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78
libs/libc/net/lib_getifaddrs.c
View file

@ -24,6 +24,7 @@
* Included Files
****************************************************************************/
#include <debug.h>
#include <errno.h>
#include <ifaddrs.h>
#include <net/if.h>
@ -57,6 +58,76 @@ struct myifaddrs
struct sockaddr hwaddr;
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: getmutil_ipv6addr
*
* Input Parameters:
* fd - socket fd of ioctl.
* req - lifreq struct for ioctl request.
* ifaddr - the ifaddrs struct to be filled.
*
* Returned Value:
* On success, getmutil_ipv6addr() returns newest pointer of the linked
* list; on error, NULL is returned.
*
****************************************************************************/
#ifdef CONFIG_NETDEV_MAX_IPv6_ADDR
static FAR struct myifaddrs *getmutil_ipv6addr(int fd, struct lifreq *req,
FAR struct myifaddrs *ifaddr)
{
FAR struct sockaddr_in6 *ipv6addr;
int index;
/* eth0:0 is the second ipaddr */
for (index = 0; index < CONFIG_NETDEV_MAX_IPv6_ADDR - 1; index++)
{
int len = snprintf(req->lifr_name, sizeof(req->lifr_name),
"%s:%d", ifaddr->name, index);
if (len < 0 || len >= sizeof(req->lifr_name))
{
nwarn("ifname %s:%2d error or too long\n", ifaddr->name, index);
return ifaddr;
}
if (ioctl(fd, SIOCGLIFADDR, (unsigned long)req) < 0)
{
continue;
}
ipv6addr = (FAR struct sockaddr_in6 *)&(req->lifr_addr);
if (IN6_IS_ADDR_UNSPECIFIED(&ipv6addr->sin6_addr))
{
continue;
}
ifaddr->addrs.ifa_next = lib_zalloc(sizeof(*ifaddr));
if (ifaddr == NULL)
{
return NULL;
}
memcpy(ifaddr->addrs.ifa_next, ifaddr, sizeof(struct myifaddrs));
ifaddr = (FAR struct myifaddrs *)ifaddr->addrs.ifa_next;
memcpy(&ifaddr->addr, &(req->lifr_addr), sizeof(req->lifr_addr));
ifaddr->addrs.ifa_addr = (FAR struct sockaddr *)&ifaddr->addr;
ifaddr->addrs.ifa_netmask = (FAR struct sockaddr *)&ifaddr->netmask;
ifaddr->addrs.ifa_dstaddr = (FAR struct sockaddr *)&ifaddr->dstaddr;
ifaddr->addrs.ifa_broadaddr =
(FAR struct sockaddr *)&ifaddr->broadaddr;
ifaddr->addrs.ifa_data = (FAR struct sockaddr *)&ifaddr->hwaddr;
}
return ifaddr;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
@ -267,6 +338,13 @@ int getifaddrs(FAR struct ifaddrs **addrs)
memcpy(&myaddrs->hwaddr,
&req.lifr_hwaddr, sizeof(req.lifr_hwaddr));
}
# ifdef CONFIG_NETDEV_MAX_IPv6_ADDR
if (getmutil_ipv6addr(sockfd, &req, myaddrs) == NULL)
{
goto err;
}
# endif
}
#endif
}