sgs_iface: Accept messages with unknown TLV elements
3GPP TS 29.118, chapter 7.5 states that unknown TLV elements should be ignored rather than that the whole message is discarded a STATUS message is sent. Lets turn the returncode check of the tlv_parse() call into a log message and continue normally. Change-Id: Ic6714451ad970043d4765f8420d753daf5294a44 Related: OS#4214
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@ -945,10 +945,8 @@ int sgs_iface_rx(struct sgs_connection *sgc, struct msgb *msg)
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/* Parse TLV elements */
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rc = tlv_parse(&tp, &sgsap_ie_tlvdef, msgb_l2(msg) + 1, msgb_l2len(msg) - 1, 0, 0);
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if (rc < 0) {
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TX_STATUS_AND_LOG(sgc, msg_type, SGSAP_SGS_CAUSE_SEMANT_INCORR_MSG, "SGsAP Message %s parsing error\n");
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goto error;
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}
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if (rc < 0)
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LOGSGC(sgc, LOGL_NOTICE, "SGsAP Message %s contains unknown TLV IEs\n", sgsap_msg_type_name(msg_type));
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/* Most of the messages contain an IMSI as mandatory IE, parse it right here */
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if (!TLVP_PRESENT(&tp, SGSAP_IE_IMSI) &&
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