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'guess' DST address in IPv6 links

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This commit is contained in:
Nikos Mavrogiannopoulos
2014-01-30 04:53:00 +01:00
parent 83b2d75a24
commit 326bf7143a
1 changed files with 56 additions and 23 deletions
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src/worker-tun.c
+56 -23
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@@ -72,8 +72,10 @@ int get_ips(struct worker_st *ws, struct vpn_st *vinfo, char **buffer,
if (strcmp(vinfo->name, ifa->ifa_name) == 0) {
p = (char *)inet_ntop(ifa->ifa_addr->sa_family,
SA_IN_P_TYPE(ifa->ifa_addr, ifa->ifa_addr->sa_family),
*buffer, *buffer_size);
SA_IN_P_TYPE(ifa->ifa_addr,
ifa->ifa_addr->
sa_family), *buffer,
*buffer_size);
if (p == NULL) {
e = errno;
oclog(ws, LOG_ERR, "inet_ntop error: %s",
@@ -95,32 +97,62 @@ int get_ips(struct worker_st *ws, struct vpn_st *vinfo, char **buffer,
vinfo->ipv6_local = p;
}
/* DST */
if (ifa->ifa_dstaddr == NULL)
continue;
if (ifa->ifa_addr->sa_family == AF_INET6) {
/* no DST address */
struct in6_addr ip;
p = (char *)inet_ntop(ifa->ifa_dstaddr->sa_family,
SA_IN_P_TYPE(ifa->ifa_dstaddr, ifa->ifa_dstaddr->sa_family),
*buffer, *buffer_size);
if (p == NULL) {
e = errno;
oclog(ws, LOG_ERR, "inet_ntop error: %s",
strerror(e));
continue;
}
memcpy(&ip,
SA_IN_P_TYPE(ifa->ifa_addr,
ifa->ifa_addr->sa_family),
sizeof(ip));
((uint8_t *) & ip)[15]++;
ret = strlen(p) + 1;
*buffer += ret;
*buffer_size -= ret;
p = (char *)inet_ntop(AF_INET6,
&ip, *buffer,
*buffer_size);
if (p == NULL) {
e = errno;
oclog(ws, LOG_ERR,
"inet_ntop error: %s",
strerror(e));
continue;
}
ret = strlen(p) + 1;
*buffer += ret;
*buffer_size -= ret;
if (ifa->ifa_dstaddr->sa_family == AF_INET) {
if (strcmp(p, "0.0.0.0") == 0)
p = NULL;
vinfo->ipv4 = p;
} else {
if (strcmp(p, "::") == 0)
p = NULL;
vinfo->ipv6 = p;
} else {
/* DST */
if (ifa->ifa_dstaddr == NULL)
continue;
p = (char *)inet_ntop(ifa->ifa_dstaddr->
sa_family,
SA_IN_P_TYPE(ifa->
ifa_dstaddr,
ifa->
ifa_dstaddr->
sa_family),
*buffer, *buffer_size);
if (p == NULL) {
e = errno;
oclog(ws, LOG_ERR,
"inet_ntop error: %s",
strerror(e));
continue;
}
ret = strlen(p) + 1;
*buffer += ret;
*buffer_size -= ret;
if (strcmp(p, "0.0.0.0") == 0)
p = NULL;
vinfo->ipv4 = p;
}
}
}
@@ -198,7 +230,8 @@ int get_rt_vpn_info(worker_st * ws,
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", vinfo->name);
ret = ioctl(fd, SIOCGIFMTU, (caddr_t) & ifr);
if (ret < 0) {
oclog(ws, LOG_ERR, "cannot obtain MTU for %s. Assuming 1500",
oclog(ws, LOG_ERR,
"cannot obtain MTU for %s. Assuming 1500",
vinfo->name);
vinfo->mtu = 1500;
} else {