FreeCalypso > hg > themwi-system-sw
view mncc/call_setup.c @ 25:fd43f179ff1d
themwi-mncc: need to initialize sa_len before accept call
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 28 Jun 2022 18:47:56 -0800 |
parents | ccc5ab6d8388 |
children | c6572f4c31d2 |
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/* * In this module we implement setup of new calls: either new MO calls * coming from GSM or new MT calls coming from a ThemWi call socket. */ #include <sys/types.h> #include <sys/socket.h> #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <syslog.h> #include "../include/mncc.h" #include "../include/gsm48_const.h" #include "struct.h" #include "gsm_call.h" preen_msc_provided_number(nums) struct gsm_mncc_number *nums; { int len; len = grok_number_string(nums->number, 0); switch (len) { case 4: nums->type = GSM48_TON_NET_SPEC; nums->plan = GSM48_NPI_PRIVATE; break; case 11: if (nums->number[0] != '1') return(0); nums->type = GSM48_TON_INTERNATIONAL; nums->plan = GSM48_NPI_ISDN_E164; break; default: return(0); } nums->screen = GSM48_SCRN_NETWORK; return(1); } void reject_mo_call(callref, cause_loc, cause_val) uint32_t callref; { struct gsm_mncc msg; bzero(&msg, sizeof(struct gsm_mncc)); msg.msg_type = MNCC_REJ_REQ; msg.callref = callref; mncc_set_cause(&msg, cause_loc, cause_val); send_mncc_to_gsm(&msg, sizeof(struct gsm_mncc)); } void process_mo_call_setup(msg) struct gsm_mncc *msg; { struct gsm_call *call; char nanp[11]; int res, is_nanp, is_itn, is_local; if (preen_msc_provided_number(&msg->calling)) msg->fields |= MNCC_F_CALLING; else msg->fields &= ~MNCC_F_CALLING; if (!(msg->fields & MNCC_F_CALLED)) { reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_INVAL_MAND_INF); return; } call = create_gsm_call(msg->callref); if (!call) { reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_RESOURCE_UNAVAIL); return; } /* route based on destination address */ refresh_number_db(); is_nanp = is_itn = 0; switch (grok_number_string(msg->called.number, 0)) { case 4: if (msg->called.type != GSM48_TON_UNKNOWN && msg->called.type != GSM48_TON_NET_SPEC && msg->called.type != GSM48_TON_SHORT_CODE) break; if (msg->called.plan != GSM48_NPI_UNKNOWN && msg->called.plan != GSM48_NPI_ISDN_E164 && msg->called.plan != GSM48_NPI_PRIVATE) break; res = lookup_short_dial_number(msg->called.number, nanp); if (!res) { reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_UNASSIGNED_NR); call->gc_flag = 1; return; } if (nanp[0]) { is_nanp = 1; msg->called.type = GSM48_TON_INTERNATIONAL; msg->called.plan = GSM48_NPI_ISDN_E164; msg->called.number[0] = '1'; strcpy(msg->called.number+1, nanp); } else { is_itn = 1; msg->called.type = GSM48_TON_NET_SPEC; msg->called.plan = GSM48_NPI_PRIVATE; } break; case 10: if (msg->called.type != GSM48_TON_UNKNOWN && msg->called.type != GSM48_TON_NATIONAL) break; if (msg->called.plan != GSM48_NPI_UNKNOWN && msg->called.plan != GSM48_NPI_ISDN_E164 && msg->called.plan != GSM48_NPI_NATIONAL) break; if (!is_nanp_valid_prefix(msg->called.number)) { reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_INV_NR_FORMAT); call->gc_flag = 1; return; } is_nanp = 1; /* canonicalize to international format */ bcopy(msg->called.number, msg->called.number+1, 11); msg->called.number[0] = '1'; msg->called.type = GSM48_TON_INTERNATIONAL; msg->called.plan = GSM48_NPI_ISDN_E164; break; case 11: if (msg->called.type != GSM48_TON_UNKNOWN && msg->called.type != GSM48_TON_INTERNATIONAL) break; if (msg->called.plan != GSM48_NPI_UNKNOWN && msg->called.plan != GSM48_NPI_ISDN_E164) break; if (msg->called.number[0] != '1') break; if (!is_nanp_valid_prefix(msg->called.number+1)) { reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_INV_NR_FORMAT); call->gc_flag = 1; return; } is_nanp = 1; /* canonicalize to international format */ msg->called.type = GSM48_TON_INTERNATIONAL; msg->called.plan = GSM48_NPI_ISDN_E164; break; } is_local = is_itn; if (is_nanp && is_nanp_locally_owned(msg->called.number+1)) is_local = 1; /* weed out attempts to call yourself */ if (is_local && !strcmp(msg->calling.number, msg->called.number)) { reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_INCOMPAT_DEST); call->gc_flag = 1; return; } /* actually route the call */ if (is_local) { internal_switch_mo_setup(call, msg); return; } /* outbound calls remain to be implemented */ reject_mo_call(msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_NO_ROUTE); call->gc_flag = 1; } static void reject_mt_call(conn, callref, cause_loc, cause_val) struct socket_conn *conn; uint32_t callref; { struct gsm_mncc msg; bzero(&msg, sizeof(struct gsm_mncc)); msg.msg_type = MNCC_REJ_REQ; msg.callref = callref; mncc_set_cause(&msg, cause_loc, cause_val); mncc_signal_to_socket_nocall(conn, &msg); } void process_ext_mtcall_setup(conn, msg) struct socket_conn *conn; struct gsm_mncc *msg; { struct gsm_call *call; if (!(msg->fields & MNCC_F_CALLED) && !msg->imsi[0]) { reject_mt_call(conn, msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_INVAL_MAND_INF); return; } call = create_new_mt_call(); if (!call) { reject_mt_call(conn, msg->callref, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_RESOURCE_UNAVAIL); return; } call->socket = conn; call->socket_ref = msg->callref; /* forward to GSM MNCC interface */ msg->callref = call->callref; send_mncc_to_gsm(&msg, sizeof(struct gsm_mncc)); } preen_connected_number(msg) struct gsm_mncc *msg; { if (preen_msc_provided_number(&msg->connected)) msg->fields |= MNCC_F_CONNECTED; else msg->fields &= ~MNCC_F_CONNECTED; }