kentpeacock / rpms / openssh

Forked from rpms/openssh 2 years ago
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diff --git a/canohost.c b/canohost.c
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index a61a8c9..97ce58c 100644
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--- a/canohost.c
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+++ b/canohost.c
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@@ -165,12 +165,29 @@ check_ip_options(int sock, char *ipaddr)
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 	option_size = sizeof(options);
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 	if (getsockopt(sock, ipproto, IP_OPTIONS, options,
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 	    &option_size) >= 0 && option_size != 0) {
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-		text[0] = '\0';
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-		for (i = 0; i < option_size; i++)
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-			snprintf(text + i*3, sizeof(text) - i*3,
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-			    " %2.2x", options[i]);
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-		fatal("Connection from %.100s with IP options:%.800s",
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-		    ipaddr, text);
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+		i = 0;
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+		do {
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+			switch (options[i]) {
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+				case 0:
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+				case 1:
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+					++i;
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+					break;
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+				case 130:
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+				case 133:
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+				case 134:
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+					i += options[i + 1];
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+					break;
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+				default:
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+				/* Fail, fatally, if we detect either loose or strict
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+			 	 * source routing options. */
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+					text[0] = '\0';
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+					for (i = 0; i < option_size; i++)
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+						snprintf(text + i*3, sizeof(text) - i*3,
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+							" %2.2x", options[i]);
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+					fatal("Connection from %.100s with IP options:%.800s",
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+						ipaddr, text);
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+			}
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+		} while (i < option_size);
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 	}
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 #endif /* IP_OPTIONS */
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 }