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annotate libsip/uas_basic.c @ 69:8cf85edca543

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sip-in: implement SIP ACK handling
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 19 Sep 2022 14:55:57 -0800
parents 5427b26525cd
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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46
5427b26525cd libsip: beginning to flesh out
Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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2 * Here we implement some essential UAS functions.
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Mychaela Falconia <falcon@freecalypso.org>
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3 */
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Mychaela Falconia <falcon@freecalypso.org>
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4
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Mychaela Falconia <falcon@freecalypso.org>
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5 #include <ctype.h>
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Mychaela Falconia <falcon@freecalypso.org>
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6 #include <string.h>
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Mychaela Falconia <falcon@freecalypso.org>
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7 #include <strings.h>
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Mychaela Falconia <falcon@freecalypso.org>
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8 #include <stdio.h>
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Mychaela Falconia <falcon@freecalypso.org>
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9 #include <stdlib.h>
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Mychaela Falconia <falcon@freecalypso.org>
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10 #include "parse.h"
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Mychaela Falconia <falcon@freecalypso.org>
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11 #include "uas_basic.h"
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Mychaela Falconia <falcon@freecalypso.org>
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12 #include "out_msg.h"
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Mychaela Falconia <falcon@freecalypso.org>
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13
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Mychaela Falconia <falcon@freecalypso.org>
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14 extern char *get_single_header();
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Mychaela Falconia <falcon@freecalypso.org>
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15
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Mychaela Falconia <falcon@freecalypso.org>
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16 uas_get_basic_headers(msg, ess)
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Mychaela Falconia <falcon@freecalypso.org>
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17 struct sip_pkt_rx *msg;
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Mychaela Falconia <falcon@freecalypso.org>
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18 struct uas_parse_hdrs *ess;
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Mychaela Falconia <falcon@freecalypso.org>
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19 {
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Mychaela Falconia <falcon@freecalypso.org>
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20 char *hval, *cp;
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Mychaela Falconia <falcon@freecalypso.org>
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21 int dup_flag = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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22
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Mychaela Falconia <falcon@freecalypso.org>
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23 hval = get_single_header(msg, "Call-ID", "i", &dup_flag);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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24 if (!hval || dup_flag) {
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Mychaela Falconia <falcon@freecalypso.org>
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25 ess->error_field = "Call-ID";
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Mychaela Falconia <falcon@freecalypso.org>
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26 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
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27 }
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Mychaela Falconia <falcon@freecalypso.org>
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28 ess->call_id = hval;
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Mychaela Falconia <falcon@freecalypso.org>
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29 hval = get_single_header(msg, "CSeq", (char *) 0, &dup_flag);
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Mychaela Falconia <falcon@freecalypso.org>
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30 if (!hval || dup_flag) {
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Mychaela Falconia <falcon@freecalypso.org>
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31 bad_cseq: ess->error_field = "CSeq";
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Mychaela Falconia <falcon@freecalypso.org>
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32 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
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33 }
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Mychaela Falconia <falcon@freecalypso.org>
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34 if (!isdigit(*hval))
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Mychaela Falconia <falcon@freecalypso.org>
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35 goto bad_cseq;
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Mychaela Falconia <falcon@freecalypso.org>
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36 ess->cseq_num = strtoul(hval, &cp, 10);
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Mychaela Falconia <falcon@freecalypso.org>
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37 if (*cp) {
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Mychaela Falconia <falcon@freecalypso.org>
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38 if (!isspace(*cp))
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Mychaela Falconia <falcon@freecalypso.org>
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39 goto bad_cseq;
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Mychaela Falconia <falcon@freecalypso.org>
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40 while (isspace(*cp))
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Mychaela Falconia <falcon@freecalypso.org>
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41 cp++;
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Mychaela Falconia <falcon@freecalypso.org>
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42 if (strcmp(cp, msg->req_method))
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Mychaela Falconia <falcon@freecalypso.org>
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43 goto bad_cseq;
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Mychaela Falconia <falcon@freecalypso.org>
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44 }
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Mychaela Falconia <falcon@freecalypso.org>
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45 hval = get_single_header(msg, "From", "f", &dup_flag);
5427b26525cd libsip: beginning to flesh out
Mychaela Falconia <falcon@freecalypso.org>
parents:
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46 if (!hval || dup_flag) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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47 ess->error_field = "From";
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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48 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
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49 }
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Mychaela Falconia <falcon@freecalypso.org>
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50 ess->from = hval;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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51 hval = get_single_header(msg, "To", "t", &dup_flag);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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52 if (!hval || dup_flag) {
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Mychaela Falconia <falcon@freecalypso.org>
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53 ess->error_field = "To";
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Mychaela Falconia <falcon@freecalypso.org>
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54 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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55 }
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Mychaela Falconia <falcon@freecalypso.org>
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56 ess->to = hval;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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57 hval = get_single_header(msg, "Via", "v", &dup_flag);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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58 if (!hval || dup_flag) {
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Mychaela Falconia <falcon@freecalypso.org>
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59 ess->error_field = "Via";
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Mychaela Falconia <falcon@freecalypso.org>
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60 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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61 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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62 ess->via = hval;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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63 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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64 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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65
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 add_resp_basic_headers(msg, ess, req_method)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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67 struct sip_msg_out *msg;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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68 struct uas_parse_hdrs *ess;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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69 char *req_method;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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70 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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71 char cseq_str[80];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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72 int rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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73
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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74 rc = out_msg_add_header(msg, "From", ess->from);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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75 if (rc < 0)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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76 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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77 rc = out_msg_add_header(msg, "To", ess->to);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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78 if (rc < 0)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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79 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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80 rc = out_msg_add_header(msg, "Call-ID", ess->call_id);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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81 if (rc < 0)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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82 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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83 sprintf(cseq_str, "%u %.64s", ess->cseq_num, req_method);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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84 rc = out_msg_add_header(msg, "CSeq", cseq_str);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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85 if (rc < 0)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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86 return rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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87 return out_msg_add_header(msg, "Via", ess->via);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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88 }