gprs: Send GSUP error reply for requests without IMSI
Currently gprs_subscr_rx_gsup_message returns immediately after it detects that an IMSI has not been given in the received GSUP message. While this is ok for responses (result or error), a request should always be answered. This commit adds code to reply with a corresponding error message ("Invalid mandatory information") when it receives a request without an IMSI. Note that the generated error message will not contain an IMSI either. Sponsored-by: On-Waves ehf
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@ -505,8 +505,14 @@ int gprs_subscr_rx_gsup_message(struct msgb *msg)
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return rc;
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}
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if (!gsup_msg.imsi[0])
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if (!gsup_msg.imsi[0]) {
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LOGP(DGPRS, LOGL_ERROR, "Missing IMSI in GSUP message\n");
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if (GPRS_GSUP_IS_MSGT_REQUEST(gsup_msg.message_type))
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gprs_subscr_tx_gsup_error_reply(NULL, &gsup_msg,
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GMM_CAUSE_INV_MAND_INFO);
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return -GMM_CAUSE_INV_MAND_INFO;
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}
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subscr = gprs_subscr_get_by_imsi(gsup_msg.imsi);
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