dl tbf: initialize punct values and verify
Solves a sanitizer issue where punct2 is unset when passed to gprs_rlc_mcs_cps() and thus takes a value not defined in the enum. Change-Id: I004cbbab15e6ffa2749f4b7f1df651517c2ae693
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49b83ec3a3
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src/rlc.cpp
30
src/rlc.cpp
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@ -378,6 +378,36 @@ unsigned int gprs_rlc_mcs_cps(GprsCodingScheme cs,
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enum egprs_puncturing_values punct,
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enum egprs_puncturing_values punct2, int with_padding)
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{
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/* validate that punct and punct2 are as expected */
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switch (GprsCodingScheme::Scheme(cs)) {
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case GprsCodingScheme::MCS9:
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case GprsCodingScheme::MCS8:
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case GprsCodingScheme::MCS7:
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if (punct2 == EGPRS_PS_INVALID) {
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LOGP(DRLCMACDL, LOGL_ERROR,
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"Invalid punct2 value for coding scheme %d: %d\n",
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GprsCodingScheme::Scheme(cs), punct2);
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return -1;
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}
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/* fall through */
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case GprsCodingScheme::MCS6:
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case GprsCodingScheme::MCS5:
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case GprsCodingScheme::MCS4:
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case GprsCodingScheme::MCS3:
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case GprsCodingScheme::MCS2:
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case GprsCodingScheme::MCS1:
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if (punct == EGPRS_PS_INVALID) {
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LOGP(DRLCMACDL, LOGL_ERROR,
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"Invalid punct value for coding scheme %d: %d\n",
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GprsCodingScheme::Scheme(cs), punct);
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return -1;
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}
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break;
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default:
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return -1;
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}
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/* See 3GPP TS 44.060 10.4.8a.3.1, 10.4.8a.2.1, 10.4.8a.1.1 */
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switch (GprsCodingScheme::Scheme(cs)) {
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case GprsCodingScheme::MCS1: return 0b1011 +
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punct % EGPRS_MAX_PS_NUM_2;
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@ -627,10 +627,16 @@ struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block(
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GprsCodingScheme cs;
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int bsns[ARRAY_SIZE(rlc.block_info)];
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unsigned num_bsns;
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enum egprs_puncturing_values punct[ARRAY_SIZE(rlc.block_info)];
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bool need_padding = false;
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enum egprs_rlcmac_dl_spb spb = EGPRS_RLCMAC_DL_NO_RETX;
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unsigned int spb_status = get_egprs_dl_spb_status(index);
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enum egprs_puncturing_values punct[2] = {
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EGPRS_PS_INVALID, EGPRS_PS_INVALID
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};
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osmo_static_assert(ARRAY_SIZE(rlc.block_info) == 2,
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rlc_block_info_size_is_two);
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/*
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* TODO: This is an experimental work-around to put 2 BSN into
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* MSC-7 to MCS-9 encoded messages. It just sends the same BSN
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@ -763,10 +769,8 @@ struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block(
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}
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/* Calculate CPS only for EGPRS case */
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if (cs.isEgprs()) {
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OSMO_ASSERT(ARRAY_SIZE(punct) >= 2);
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if (cs.isEgprs())
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rlc.cps = gprs_rlc_mcs_cps(cs, punct[0], punct[1], need_padding);
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}
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/* If the TBF has just started, relate frames_since_last_poll to the
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* current fn */
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