FreeCalypso > hg > freecalypso-tools

annotate rvinterf/rvtat/interf.c @ 921:74d284add54d

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fc-fsio: guard against bogus readdir results from the target If the FFS being operated on contains SE K2x0 extended filenames, readdir will return strings that are bad for printing. We need to guard against this possibility, and also against possible other bogosity that could be sent by other alien firmwares.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 31 Dec 2022 22:55:23 +0000
parents 99471c57155a
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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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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25 int cc;
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26
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27 while (nbytes) {
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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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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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74 cmdpkt[0] = CLI2RVI_WANT_MUXPROTO;
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75 cmdpkt[1] = RVT_AT_HEADER;
0
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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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Mychaela Falconia <falcon@freecalypso.org>
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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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106 hdrbuf[2] = CLI2RVI_PKT_TO_TARGET;
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Mychaela Falconia <falcon@freecalypso.org>
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107 write(sock, hdrbuf, 3);
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Mychaela Falconia <falcon@freecalypso.org>
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108 write(sock, pkt, pktlen);
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109 }
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110
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111 collect_pkt_from_target()
0
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112 {
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113 collect_rvi_msg();
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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114 if (rvi_msg[0] != RVI2CLI_PKT_FROM_TARGET) {
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Mychaela Falconia <falcon@freecalypso.org>
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115 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
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116 "error: unexpected response type from rvinterf\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 exit(ERROR_RVINTERF);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 }
346
99471c57155a fcup-rvtat program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
119 if (rvi_msg_len < 2) {
99471c57155a fcup-rvtat program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
120 fprintf(stderr, "error: packet from target is null\n");
99471c57155a fcup-rvtat program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
121 exit(ERROR_RVINTERF);
0
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 }
346
99471c57155a fcup-rvtat program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
123 if (rvi_msg[1] != RVT_AT_HEADER) {
99471c57155a fcup-rvtat program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
124 fprintf(stderr,
99471c57155a fcup-rvtat program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
125 "error: packet from target is not on ATI channel\n");
99471c57155a fcup-rvtat program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
126 exit(ERROR_RVINTERF);
0
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 return(0);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 }