static struct pdu *
text_receive(struct connection *conn)
{
struct pdu *response;
struct iscsi_bhs_text_response *bhstr;
response = pdu_new(conn);
pdu_receive(response);
if (response->pdu_bhs->bhs_opcode != ISCSI_BHS_OPCODE_TEXT_RESPONSE)
log_errx(1, "protocol error: received invalid opcode 0x%x",
response->pdu_bhs->bhs_opcode);
bhstr = (struct iscsi_bhs_text_response *)response->pdu_bhs;
#if 0
if ((bhstr->bhstr_flags & BHSTR_FLAGS_FINAL) == 0)
log_errx(1, "received Text PDU without the \"F\" flag");
#endif
/*
* XXX: Implement the C flag some day.
*/
if ((bhstr->bhstr_flags & BHSTR_FLAGS_CONTINUE) != 0)
log_errx(1, "received Text PDU with unsupported \"C\" flag");
if (ntohl(bhstr->bhstr_statsn) != conn->conn_statsn + 1) {
log_errx(1, "received Text PDU with wrong StatSN: "
"is %u, should be %u", ntohl(bhstr->bhstr_statsn),
conn->conn_statsn + 1);
}
conn->conn_statsn = ntohl(bhstr->bhstr_statsn);
return (response);
}
static struct pdu *
login_receive(struct connection *conn, bool initial)
{
struct pdu *request;
struct iscsi_bhs_login_request *bhslr;
request = pdu_new(conn);
pdu_receive(request);
if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
ISCSI_BHS_OPCODE_LOGIN_REQUEST) {
/*
* The first PDU in session is special - if we receive any PDU
* different than login request, we have to drop the connection
* without sending response ("A target receiving any PDU
* except a Login request before the Login Phase is started MUST
* immediately terminate the connection on which the PDU
* was received.")
*/
if (initial == false)
login_send_error(request, 0x02, 0x0b);
log_errx(1, "protocol error: received invalid opcode 0x%x",
request->pdu_bhs->bhs_opcode);
}
bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
/*
* XXX: Implement the C flag some day.
*/
if ((bhslr->bhslr_flags & BHSLR_FLAGS_CONTINUE) != 0) {
login_send_error(request, 0x03, 0x00);
log_errx(1, "received Login PDU with unsupported \"C\" flag");
}
if (bhslr->bhslr_version_max != 0x00) {
login_send_error(request, 0x02, 0x05);
log_errx(1, "received Login PDU with unsupported "
"Version-max 0x%x", bhslr->bhslr_version_max);
}
if (bhslr->bhslr_version_min != 0x00) {
login_send_error(request, 0x02, 0x05);
log_errx(1, "received Login PDU with unsupported "
"Version-min 0x%x", bhslr->bhslr_version_min);
}
if (initial == false &&
ISCSI_SNLT(ntohl(bhslr->bhslr_cmdsn), conn->conn_cmdsn)) {
login_send_error(request, 0x02, 0x00);
log_errx(1, "received Login PDU with decreasing CmdSN: "
"was %u, is %u", conn->conn_cmdsn,
ntohl(bhslr->bhslr_cmdsn));
}
if (initial == false &&
ntohl(bhslr->bhslr_expstatsn) != conn->conn_statsn) {
login_send_error(request, 0x02, 0x00);
log_errx(1, "received Login PDU with wrong ExpStatSN: "
"is %u, should be %u", ntohl(bhslr->bhslr_expstatsn),
conn->conn_statsn);
}
conn->conn_cmdsn = ntohl(bhslr->bhslr_cmdsn);
return (request);
}
static struct pdu *
logout_receive(struct connection *conn)
{
struct pdu *response;
struct iscsi_bhs_logout_response *bhslr;
response = pdu_new(conn);
pdu_receive(response);
if (response->pdu_bhs->bhs_opcode != ISCSI_BHS_OPCODE_LOGOUT_RESPONSE)
log_errx(1, "protocol error: received invalid opcode 0x%x",
response->pdu_bhs->bhs_opcode);
bhslr = (struct iscsi_bhs_logout_response *)response->pdu_bhs;
if (ntohs(bhslr->bhslr_response) != BHSLR_RESPONSE_CLOSED_SUCCESSFULLY)
log_warnx("received Logout Response with reason %d",
ntohs(bhslr->bhslr_response));
if (ntohl(bhslr->bhslr_statsn) != conn->conn_statsn + 1) {
log_errx(1, "received Logout PDU with wrong StatSN: "
"is %u, should be %u", ntohl(bhslr->bhslr_statsn),
conn->conn_statsn + 1);
}
conn->conn_statsn = ntohl(bhslr->bhslr_statsn);
return (response);
}
