FreeCalypso > hg > freecalypso-tools

annotate rvinterf/old/libg23/fmtdispatch.c @ 1011:6d9b10633f10 default tip

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etmsync Pirelli IMEI retrieval: fix poor use of printf() Bug reported by Vadim Yanitskiy <fixeria@osmocom.org>: the construct where a static-allocated string was passed to printf() without any format arguments causes newer compilers to report a security problem. Given that formatted output is not needed here, just fixed string output, change printf() to fputs(), and direct the error message to stderr while at it.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 23 May 2024 17:29:57 +0000
parents 4c601097d23f
children
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0
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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 * This libg23 module exports the format_g23_packet() function, which
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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3 * validates the packet, then dispatches it to format_g23_trace(),
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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4 * format_g23_sysprim() or format_g23_psprim() as appropriate, or
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * prints it in raw hex if malformed.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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6 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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7
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 #include <sys/types.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 #include <stdio.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <string.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include <strings.h>
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Mychaela Falconia <falcon@freecalypso.org>
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12
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 static int
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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14 basic_checks(rxpkt, rxpkt_len)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 u_char *rxpkt;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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16 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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17 int i, c;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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18
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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19 if (rxpkt_len < 17)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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20 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 /* check version bits in the header byte */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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22 if ((rxpkt[1] & 0xC0) != 0x80)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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23 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 /* check the length */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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25 c = rxpkt[2] | rxpkt[3] << 8;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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26 if (c + 4 != rxpkt_len)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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27 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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28 /* ensure that the "from" and "to" are printable ASCII */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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29 for (i = 8; i < 16; i++) {
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Mychaela Falconia <falcon@freecalypso.org>
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30 c = rxpkt[i];
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Mychaela Falconia <falcon@freecalypso.org>
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31 if (c < ' ' || c > '~')
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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32 return(0);
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33 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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34 /* basic checks pass */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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35 return(1);
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Mychaela Falconia <falcon@freecalypso.org>
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36 }
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37
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38 static int
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Mychaela Falconia <falcon@freecalypso.org>
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39 psprim_extra_checks(rxpkt, rxpkt_len)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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40 u_char *rxpkt;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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41 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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42 int i, c;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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43
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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44 if (rxpkt_len < 24)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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46 /* "original rcvr" field needs to be printable ASCII */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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47 for (i = 16; i < 20; i++) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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48 c = rxpkt[i];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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49 if (c < ' ' || c > '~')
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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50 return(0);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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51 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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52 /* checks pass */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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53 return(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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54 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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55
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parents:
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56 static void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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57 print_unknown_bin(rxpkt, rxpkt_len, outbuf)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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58 u_char *rxpkt;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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59 char *outbuf;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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60 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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61 int i;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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62 char *dp;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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63
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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64 dp = outbuf;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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65 strcpy(dp, "GPF UNK:");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 dp += 8;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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67 for (i = 1; i < rxpkt_len; i++) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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68 sprintf(dp, " %02X", rxpkt[i]);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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69 dp += 3;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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70 }
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parents:
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71 *dp = '\0';
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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72 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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74 static void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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75 print_old_ascii(rxpkt, rxpkt_len, outbuf)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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76 u_char *rxpkt;
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Mychaela Falconia <falcon@freecalypso.org>
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77 char *outbuf;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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78 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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79 char *dp;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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80 int txtlen = rxpkt_len - 1;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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81
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82 dp = outbuf;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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83 strcpy(dp, "GPF ASC: ");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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84 dp += 9;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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85 bcopy(rxpkt + 1, dp, txtlen);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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86 dp += txtlen;
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Mychaela Falconia <falcon@freecalypso.org>
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87 *dp = '\0';
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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88 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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89
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Mychaela Falconia <falcon@freecalypso.org>
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90 static int
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 is_old_ascii(rxpkt, rxpkt_len)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 u_char *rxpkt;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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93 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 int i, c;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 for (i = 1; i < rxpkt_len; i++) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 c = rxpkt[i];
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parents:
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98 if (c < ' ' || c > '~')
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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99 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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101 return(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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102 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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103
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Mychaela Falconia <falcon@freecalypso.org>
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104 static void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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105 print_malformed(rxpkt, rxpkt_len, outbuf)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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106 u_char *rxpkt;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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107 char *outbuf;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 if (is_old_ascii(rxpkt, rxpkt_len))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 print_old_ascii(rxpkt, rxpkt_len, outbuf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 else
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 print_unknown_bin(rxpkt, rxpkt_len, outbuf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 format_g23_packet(rxpkt, rxpkt_len, outbuf)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 u_char *rxpkt;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 char *outbuf;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 if (!basic_checks(rxpkt, rxpkt_len)) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 print_malformed(rxpkt, rxpkt_len, outbuf);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 /* dispatch by type */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 switch (rxpkt[1] & 0x30) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 case 0x10:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 /* PS primitive */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 if (psprim_extra_checks(rxpkt, rxpkt_len))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 format_g23_psprim(rxpkt, rxpkt_len, outbuf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 else
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 print_malformed(rxpkt, rxpkt_len, outbuf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 case 0x20:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 /* trace */
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 format_g23_trace(rxpkt, rxpkt_len, outbuf);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 case 0x30:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 /* system primitive */
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 format_g23_sysprim(rxpkt, rxpkt_len, outbuf);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 default:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 print_malformed(rxpkt, rxpkt_len, outbuf);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 }