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add function to check server/hostname - gopher-validator - Gopher validator and… |
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git clone git://git.codemadness.org/gopher-validator |
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--- |
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commit e4a622665300d0c8c5ce1a4fa6608f6733f3c191 |
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parent 5ca656215b1e77b7fef4dcf37cd6e429146b9426 |
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Author: Hiltjo Posthuma <[email protected]> |
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Date: Sat, 10 Aug 2019 20:27:37 +0200 |
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add function to check server/hostname |
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this check is incomplete, but should cover some cases |
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Diffstat: |
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M gopher-validator.c | 38 +++++++++++++++++++++++++++++… |
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1 file changed, 38 insertions(+), 0 deletions(-) |
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--- |
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diff --git a/gopher-validator.c b/gopher-validator.c |
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@@ -130,6 +130,41 @@ warning(const char *fmt, ...) |
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} |
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int |
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+isvalidserver(const char *s) |
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+{ |
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+ int colons; |
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+ |
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+ /* IPv6 */ |
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+ if (*s == '[') { |
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+ colons = 0; |
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+ s++; |
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+ for (; *s; s++) { |
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+ if (*s == ':') |
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+ colons++; |
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+ else if (*s == ']') |
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+ break; |
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+ else if (isxdigit((unsigned char)*s)) |
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+ ; |
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+ else |
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+ return 0; |
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+ } |
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+ if (colons < 2 || *s != ']') |
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+ return 0; |
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+ } else { |
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+ if (!*s) |
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+ return 0; |
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+ for (; *s; s++) { |
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+ if (!isalpha((unsigned char)*s) && |
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+ !isdigit((unsigned char)*s) && |
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+ *s != '-' && *s != '.') |
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+ return 0; |
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+ } |
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+ } |
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+ |
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+ return 1; |
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+} |
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+ |
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+int |
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edial(const char *host, const char *port) |
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{ |
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struct addrinfo hints, *res, *res0; |
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@@ -312,6 +347,9 @@ checkdir(FILE *fp) |
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} |
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} |
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+ if (!isvalidserver(v.server)) |
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+ error("%zu: invalid server: %s\n", linenr, v.server); |
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+ |
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/* check port, must be numeric and in range, port 0 is allowed: |
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"Appendix: |
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Note: Port corresponds the the TCP Port Number, its value shou… |
