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Make summarize_protover_flags() handle NULL and empty string the same
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changes/ticket34232
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5
changes/ticket34232
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@ -0,0 +1,5 @@
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o Minor bugfixes (string handling):
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- In summarize_protover_flags(), treat empty strings the same as NULL.
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This prevents protocols_known from being set. Previously, we treated
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empty strings as normal strings, which led to protocols_known being
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set. Fixes bug 34232; bugfix on 0.3.3.2-alpha. Patch by Neel Chauhan.
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@ -490,8 +490,8 @@ memoize_protover_summary(protover_summary_flags_t *out,
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/** Summarize the protocols listed in <b>protocols</b> into <b>out</b>,
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* falling back or correcting them based on <b>version</b> as appropriate.
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*
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* If protocols and version are both NULL, returns a summary with no flags
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* set.
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* If protocols and version are both NULL or "", returns a summary with no
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* flags set.
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*
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* If the protover string does not contain any recognised protocols, and the
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* version is not recognised, sets protocols_known, but does not set any other
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@ -504,10 +504,10 @@ summarize_protover_flags(protover_summary_flags_t *out,
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{
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tor_assert(out);
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memset(out, 0, sizeof(*out));
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if (protocols) {
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if (protocols && strcmp(protocols, "")) {
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memoize_protover_summary(out, protocols);
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}
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if (version && !strcmpstart(version, "Tor ")) {
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if (version && strcmp(version, "") && !strcmpstart(version, "Tor ")) {
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if (!out->protocols_known) {
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/* The version is a "Tor" version, and where there is no
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* list of protocol versions that we should be looking at instead. */
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@ -789,13 +789,9 @@ test_protover_summarize_flags(void *args)
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DEBUG_PROTOVER(flags);
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tt_mem_op(&flags, OP_EQ, &zero_flags, sizeof(flags));
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/* "" sets the protocols_known flag */
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memset(&flags, 0, sizeof(flags));
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summarize_protover_flags(&flags, "", "");
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DEBUG_PROTOVER(flags);
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tt_int_op(flags.protocols_known, OP_EQ, 1);
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/* Now clear that flag, and check the rest are zero */
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flags.protocols_known = 0;
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tt_mem_op(&flags, OP_EQ, &zero_flags, sizeof(flags));
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/* Now check version exceptions */
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