求助: 哪位大侠知道如何用socket获得ipv6的路由信息(vxworks),谢谢!

[xiaonanyouyou]

如下是我写的代码,但是运行到send的时候总是返回错误,用errnoGet查看,返回值是43,我用的系统是vxworks6.8.2,哪位大侠能给看看是啥错误,或者是否有获取ipv6下一跳的code,谢谢!

static void push_inet6_addr(struct rt_msghdr *rtm, int rtm_addr,
const char *in_addr_str)
{
int rtn = 0;
struct sockaddr_in6 *sin;

sin = (struct sockaddr_in6 *) ((char *) rtm + rtm->rtm_msglen);
memset(sin, 0, sizeof(struct sockaddr_in6));

sin->sin6_family = AF_INET6;
printf("\r\n sin->sin6_family = 0x%x",sin->sin6_family);
sin->sin6_len = sizeof(struct sockaddr_in6);
//memcpy(&sin->sin6_addr,in_addr_str,16);

rtn = inet_pton(AF_INET6, in_addr_str, &sin->sin6_addr);
printf("\r\n rtn = %d",rtn);
//printf("\r\n sin->sin6_addr = 0x%");

rtm->rtm_addrs |= rtm_addr;
rtm->rtm_msglen += sin->sin6_len;

return;
}
char bufndp[sizeof(struct rt_msghdr) + RTAX_MAX * sizeof(struct sockaddr)] = {0};
int lkup_nexthop_ipv6(char *dst_str_ptr, char *gw_addr_ptr)
{
int rsock;
int sendrtn = 0;
struct rt_msghdr *rtm;

pid_t pid = taskIdSelf();
int seq = rand();
int err;
struct sockaddr_in6 *addrs[RTAX_MAX];
char *gw_addr = gw_addr_ptr;

rsock = socket(AF_LINK, SOCK_RAW, 0);
printf("\r\n ndp rsock = 0x%x",rsock);
g_ndp_next0 = 1;
if (rsock < 0)
{
g_ndp_next1 =1;
goto errout;
}
/*
* Message format is:
* < rtm | dst >
* The length field of in 'rtm' is the length of all structures
* between '<' and '>'
*/

rtm = (struct rt_msghdr *) bufndp;
g_ndp_next2 = 1;
memset(rtm, 0, sizeof(*rtm));
g_ndp_next3 = 1;
rtm->rtm_msglen = sizeof(*rtm);
rtm->rtm_version = 6;
rtm->rtm_type = RTM_GET;
rtm->rtm_pid = pid;
rtm->rtm_seq = seq;
//rtm->rtm_table = IPCOM_ROUTE_TABLE_DEFAULT;
rtm->rtm_addrs = RTA_GATEWAY | RTA_DST;

g_ndp_next4 = 1;
push_inet6_addr(rtm, RTA_DST, dst_str_ptr);
g_ndp_next5 = 1;

/*
* Send the message to the kernel
*/
sendrtn = send(rsock, (void *) rtm, sizeof(bufndp), 0) ;
if(sendrtn < 0)
{
printf("\r\n send socket err, sendrtn = %d",sendrtn);
g_ndp_next6 = 1;
goto errout;
}
g_ndp_next7 = 1;
/*
* Receive message until we get a response to the message we sent.
* That response is identified by having the same "pid"
* and sequence number as our request and a type of RTM_ADD
*/
while (recv(rsock, (void *) rtm, sizeof(bufndp), 0) > 0)
{
g_ndp_next8 = 1;
if ((rtm->rtm_type == RTM_GET) && (rtm->rtm_pid == pid)
&& (rtm->rtm_seq == seq))
{
g_ndp_next9 = 1;
if (rtm->rtm_errno == 0)
{
g_ndp_next10 = 1;
/*Operation was successful*/
fill_addrs6((struct sockaddr **)addrs, rtm);
g_ndp_next11 = 1;

if (rtm->rtm_flags & RTF_GATEWAY)
{
g_ndp_next12 = 1;
/*Reachable through a gateway*/
*gw_addr = addrs[RTAX_GATEWAY]->sin6_addr.s6_addr;
}
else
{
g_ndp_next13 = 1;
/*Destination directly reachable*/
inet_pton(AF_INET6, dst_str_ptr, gw_addr);
}
}
g_ndp_next14 = 1;

close(rsock);
return rtm->rtm_errno;
}
}
errout:
err = errno;
close(rsock);
return err;
}

[xiaonanyouyou]

没有人知道吗？

[xiaonanyouyou]

没有人知道吗？