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Prevent allocation duplicate IP.
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@ -997,6 +997,7 @@ static int process_udp(n2n_sn_t * sss,
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memcpy(ack.edgeMac, reg.edgeMac, sizeof(n2n_mac_t));
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memcpy(ack.edgeMac, reg.edgeMac, sizeof(n2n_mac_t));
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if ((reg.dev_addr.net_addr == 0) || (reg.dev_addr.net_addr == 0xFFFFFFFF) || (reg.dev_addr.net_bitlen == 0) ||
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if ((reg.dev_addr.net_addr == 0) || (reg.dev_addr.net_addr == 0xFFFFFFFF) || (reg.dev_addr.net_bitlen == 0) ||
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((reg.dev_addr.net_addr & 0xFFFF0000) == 0xA9FE0000 /* 169.254.0.0 */)) {
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((reg.dev_addr.net_addr & 0xFFFF0000) == 0xA9FE0000 /* 169.254.0.0 */)) {
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memset(&ipaddr, 0, sizeof(n2n_ip_subnet_t));
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assign_one_ip_addr(comm, &ipaddr);
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assign_one_ip_addr(comm, &ipaddr);
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ack.dev_addr.net_addr = ipaddr.net_addr;
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ack.dev_addr.net_addr = ipaddr.net_addr;
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ack.dev_addr.net_bitlen = ipaddr.net_bitlen;
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ack.dev_addr.net_bitlen = ipaddr.net_bitlen;
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