FreeCalypso > hg > themwi-system-sw
view sip-in/invite.c @ 48:8117d8ee44a5
sip-in: beginning of INVITE handling
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 06 Sep 2022 22:07:51 -0800 |
parents | |
children | dec31b1a8b96 |
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/* * Here we implement our handling of SIP INVITE method. */ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <syslog.h> #include <unistd.h> #include "../libsip/parse.h" #include "../libsip/uas_basic.h" #include "../libsip/out_msg.h" void handle_sip_invite(req, ess, sin) struct sip_pkt_rx *req; struct uas_parse_hdrs *ess; struct sockaddr_in *sin; { char uri_user[13], *called_nanp; struct sip_msg_out resp; int rc; /* check for existing Call-ID will go here */ /* extract called number from Request-URI */ rc = user_from_sip_uri(req->req_uri, uri_user, 12); if (rc < 0) { not_nanp: start_response_out_msg(&resp, "416 Request-URI is not a NANP number"); error_resp: rc = add_resp_basic_headers(&resp, ess, req->req_method); if (rc < 0) { syslog(LOG_ERR, "INVITE error response length exceeded"); return; } out_msg_finish(&resp); sip_tx_packet(&resp, sin); return; } if (uri_user[0] == '+') { if (grok_number_string(uri_user+1, 0) != 11 || uri_user[1] != '1') goto not_nanp; called_nanp = uri_user + 2; } else switch (grok_number_string(uri_user)) { case 10: called_nanp = uri_user; break; case 11: if (uri_user[0] != '1') goto not_nanp; called_nanp = uri_user + 1; break; default: goto not_nanp; } if (!is_nanp_valid_prefix(called_nanp)) goto not_nanp; /* it is valid NANP - but is it one of ours? */ refresh_number_db(); if (!is_nanp_locally_owned(called_nanp)) { start_response_out_msg(&resp, "404 Called number does not belong here"); goto error_resp; } /* * Remaining checks to be implemented: * Require and Supported headers * SDP message body */ }