slirp: Prevent sending ICMP error replies to source-only addresses
This triggered the related assert in arp_table_search. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
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@ -262,6 +262,11 @@ icmp_error(struct mbuf *msrc, u_char type, u_char code, int minsize,
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#endif
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if(ip->ip_off & IP_OFFMASK) goto end_error; /* Only reply to fragment 0 */
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/* Do not reply to source-only IPs */
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if ((ip->ip_src.s_addr & htonl(~(0xf << 28))) == 0) {
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goto end_error;
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}
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shlen=ip->ip_hl << 2;
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s_ip_len=ip->ip_len;
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if(ip->ip_p == IPPROTO_ICMP) {
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