FreeCalypso > hg > freecalypso-tools

annotate rvinterf/etmsync/interf.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 e7502631a0f9
children
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0
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1 /*
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2 * In this module we implement our synchronous interface to the target
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3 * via rvinterf.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <unistd.h>
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10 #include "limits.h"
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11 #include "localsock.h"
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12 #include "pktmux.h"
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13 #include "exitcodes.h"
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14
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15 extern int sock;
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16
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17 int rx_enable_state;
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Mychaela Falconia <falcon@freecalypso.org>
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18 u_char rvi_msg[LOCALSOCK_MAX_MSG];
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19 int rvi_msg_len;
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20
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21 static void
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22 collect_bytes_from_rvi(buf, nbytes)
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23 u_char *buf;
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24 {
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Mychaela Falconia <falcon@freecalypso.org>
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25 int cc;
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Mychaela Falconia <falcon@freecalypso.org>
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26
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27 while (nbytes) {
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Mychaela Falconia <falcon@freecalypso.org>
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28 cc = read(sock, buf, nbytes);
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29 if (cc <= 0) {
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Mychaela Falconia <falcon@freecalypso.org>
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30 perror("read from rvinterf socket");
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31 exit(ERROR_RVINTERF);
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32 }
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33 buf += cc;
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34 nbytes -= cc;
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35 }
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36 }
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37
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38 collect_rvi_msg()
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39 {
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40 u_char lenbuf[2];
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41
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42 collect_bytes_from_rvi(lenbuf, 2);
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43 rvi_msg_len = lenbuf[0] << 8 | lenbuf[1];
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44 if (rvi_msg_len < 1 || rvi_msg_len > LOCALSOCK_MAX_MSG) {
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45 fprintf(stderr, "Invalid length from rvinterf: %02X%02X\n",
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parents:
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46 lenbuf[0], lenbuf[1]);
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47 exit(ERROR_RVINTERF);
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48 }
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49 collect_bytes_from_rvi(rvi_msg, rvi_msg_len);
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50 return(0);
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51 }
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52
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53 send_rvimisc_command(cmdpkt, cmdlen)
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54 u_char *cmdpkt;
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55 {
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56 u_char lenbuf[2];
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57
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58 lenbuf[0] = 0;
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59 lenbuf[1] = cmdlen;
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60 write(sock, lenbuf, 2);
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61 write(sock, cmdpkt, cmdlen);
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62 }
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63
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64 rx_control(enable)
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65 {
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66 u_char cmdpkt[2];
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67 int cmdlen;
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68
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69 /* are we already in the desired state? */
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70 if (rx_enable_state == enable)
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71 return(0);
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72 /* no, do the work */
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73 if (enable) {
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Mychaela Falconia <falcon@freecalypso.org>
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74 cmdpkt[0] = CLI2RVI_WANT_MUXPROTO;
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75 cmdpkt[1] = RVT_TM_HEADER;
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76 cmdlen = 2;
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77 } else {
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78 cmdpkt[0] = CLI2RVI_RESET_PACKET_RX;
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79 cmdlen = 1;
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80 }
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81 send_rvimisc_command(cmdpkt, cmdlen);
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82 collect_rvi_msg();
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83 if (rvi_msg[0] != RVI2CLI_LOCAL_CMD_RESP || rvi_msg_len < 2) {
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84 fprintf(stderr,
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85 "error: unexpected response to rvinterf local command\n");
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86 exit(ERROR_RVINTERF);
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87 }
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88 if (rvi_msg[1] != '+') {
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89 fprintf(stderr, "Error from rvinterf: %.*s\n", rvi_msg_len - 1,
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90 rvi_msg + 1);
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91 exit(ERROR_RVINTERF);
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92 }
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93 rx_enable_state = enable;
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94 return(0);
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95 }
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96
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97 send_pkt_to_target(pkt, pktlen)
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98 u_char *pkt;
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99 {
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100 u_char hdrbuf[3];
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101 int len1;
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102
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103 len1 = pktlen + 1;
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104 hdrbuf[0] = len1 >> 8;
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105 hdrbuf[1] = len1 & 0xFF;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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106 hdrbuf[2] = CLI2RVI_PKT_TO_TARGET;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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107 write(sock, hdrbuf, 3);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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108 write(sock, pkt, pktlen);
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109 }
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110
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Mychaela Falconia <falcon@freecalypso.org>
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111 target_pkt_exch(outpkt, outpktlen)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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112 u_char *outpkt;
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Mychaela Falconia <falcon@freecalypso.org>
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113 {
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Mychaela Falconia <falcon@freecalypso.org>
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114 rx_control(1);
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Mychaela Falconia <falcon@freecalypso.org>
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115 send_pkt_to_target(outpkt, outpktlen);
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Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
116 collect_rvi_msg();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 if (rvi_msg[0] != RVI2CLI_PKT_FROM_TARGET) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 "error: unexpected response type from rvinterf\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 exit(ERROR_RVINTERF);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 return(0);
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
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 etm_pkt_exch(outbuf, outlen)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 u_char *outbuf;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 int i, c;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 outbuf[0] = RVT_TM_HEADER;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 c = 0;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 for (i = 1; i <= outlen; i++)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 c ^= outbuf[i];
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 outbuf[i] = c;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 target_pkt_exch(outbuf, outlen + 2);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 if (rvi_msg[1] != RVT_TM_HEADER) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 printf("error: packet from target is not ETM!\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 return(ERROR_TARGET);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 if (rvi_msg_len < 5) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 printf("error: ETM response packet is too short\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 return(ERROR_TARGET);
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 c = 0;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 for (i = 2; i < rvi_msg_len; i++)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 c ^= rvi_msg[i];
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 if (c) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 printf("ETM response checksum error!\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 return(ERROR_TARGET);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 if (rvi_msg[2] != outbuf[1]) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 printf("error: target response is from wrong ETM component\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 return(ERROR_TARGET);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 return(0);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 }