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annotate libsip/grok_from.c @ 163:bfa9f0c0f0ac

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sip-out: handle incoming BYE as UAS
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 12 Oct 2022 14:45:31 -0800
parents 8d311fd1138b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
51
36a30349b490 sip-in: parse INVITE From header
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * Here we implement further parsing of the From header,
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3 * beyond the preliminary step of uas_get_basic_headers().
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4 */
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5
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6 #include <ctype.h>
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7 #include <string.h>
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8 #include <strings.h>
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9 #include "grok_from.h"
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10
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11 grok_from_header(from_hdr, gfr)
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12 char *from_hdr;
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13 struct grok_from *gfr;
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14 {
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15 char *cp = from_hdr, *bp;
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16 int bracketed;
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17
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18 if (*cp == '<' || !strncasecmp(cp, "sip:", 4)) {
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19 gfr->cnam = 0;
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20 gfr->cnam_len = 0;
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21 gfr->cnam_quoted = 0;
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22 } else {
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23 if (*cp == '"') {
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24 cp++;
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25 gfr->cnam = cp;
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26 for (;;) {
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27 if (!*cp)
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28 return(-1);
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29 if (*cp == '"')
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30 break;
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31 if (*cp++ == '\\') {
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32 if (!*cp)
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33 return(-1);
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34 cp++;
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35 }
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36 }
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37 gfr->cnam_len = cp - gfr->cnam;
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38 gfr->cnam_quoted = 1;
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39 cp++;
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40 while (isspace(*cp))
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41 cp++;
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42 if (*cp != '<')
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43 return(-1);
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44 } else {
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45 gfr->cnam = cp;
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46 for (;;) {
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47 if (!*cp)
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48 return(-1);
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49 if (*cp == '<')
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50 break;
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51 cp++;
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52 }
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53 for (bp = cp; bp > gfr->cnam && isspace(bp[-1]); bp--)
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54 ;
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55 gfr->cnam_len = bp - gfr->cnam;
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56 gfr->cnam_quoted = 0;
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57 }
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58 }
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59 if (*cp == '<') {
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60 cp++;
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61 bracketed = 1;
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62 } else
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63 bracketed = 0;
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64 gfr->uri = cp;
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65 if (strncasecmp(cp, "sip:", 4))
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66 return(-1);
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67 cp += 4;
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68 gfr->user = cp;
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69 for (;;) {
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70 if (!*cp || *cp == '<' || *cp == '>')
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71 return(-1);
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72 if (*cp == '@')
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73 break;
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74 cp++;
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75 }
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76 if (cp == gfr->user)
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77 return(-1);
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78 gfr->user_len = cp - gfr->user;
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79 cp++;
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80 for (;;) {
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81 switch (*cp) {
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82 case '\0':
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83 case ';':
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84 if (bracketed)
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85 return(-1);
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86 else
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87 break;
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88 case '>':
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89 if (bracketed)
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90 break;
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91 else
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92 return(-1);
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93 case '<':
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94 return(-1);
58
8d311fd1138b libsip/grok_from.c: fix bug
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95 default:
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96 cp++;
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97 continue;
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98 }
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99 break;
51
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100 }
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101 gfr->uri_len = cp - gfr->uri;
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102 return(0);
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103 }