FreeCalypso > hg > themwi-system-sw
annotate libsip/grok_from.c @ 124:7e04d28fae8b
sip-in: default use-100rel to no
BulkVS servers act badly when we send a reliable 180 Ringing response
to an incoming call, even though they advertise 100rel support in
the Supported header in the INVITE packet, and we probably won't be
implementing 100rel for outbound because doing per-the-spec PRACK
as a UAC is just too burdensome. Therefore, we need to consider
100rel extension as not-really-supported in themwi-system-sw.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 01 Oct 2022 15:54:50 -0800 |
parents | 8d311fd1138b |
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rev | line source |
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sip-in: parse INVITE From header
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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); |
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95 default: |
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96 cp++; |
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97 continue; |
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98 } |
58
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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 } |