FreeCalypso > hg > freecalypso-tools
annotate rvinterf/lowlevel/pktfwd.c @ 965:2969032bdfac
fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing
The only 100% safe way to pass a NULL pointer as a function argument
in K&R C is to cast 0 to a pointer type; failing to do so may cause
mysterious bugs (invalid stack frames or garbage in argument registers)
on 64-bit machines. This issue has already been fixed in most of
FC host tools, but I just found some missed spots: passing of NULL UDH
to PDU encoding functions in fcup-smsend[mult] in the case of single
(not concatenated) SMS.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 01 Sep 2023 07:33:51 +0000 |
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1 /* |
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2 * This rvinterf module handles the forwarding of target->host packets |
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3 * to clients connected via the local socket interface. |
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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 <string.h> |
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9 #include <strings.h> |
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10 #include <stdlib.h> |
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11 #include <unistd.h> |
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12 #include "../include/pktmux.h" |
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13 #include "../include/localsock.h" |
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14 #include "client.h" |
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15 |
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16 extern u_char rxpkt[]; |
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17 extern size_t rxpkt_len; |
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18 |
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19 extern struct client *client_head; |
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20 |
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21 forward_pkt_to_client(cli) |
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22 struct client *cli; |
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23 { |
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24 int len1; |
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25 u_char hdr[3]; |
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26 |
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27 len1 = rxpkt_len + 1; |
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28 hdr[0] = len1 >> 8; |
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29 hdr[1] = len1 & 0xFF; |
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30 hdr[2] = RVI2CLI_PKT_FROM_TARGET; |
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31 write(cli->fd, hdr, 3); |
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32 write(cli->fd, rxpkt, rxpkt_len); |
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33 } |
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34 |
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35 forward_rv_trace() |
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36 { |
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37 u32 useid; |
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38 struct client *cli; |
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39 int i, match; |
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40 |
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41 useid = rxpkt[1] << 24 | rxpkt[2] << 16 | rxpkt[3] << 8 | rxpkt[4]; |
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42 for (cli = client_head; cli; cli = cli->next) { |
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43 match = 0; |
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44 for (i = 0; i < cli->int_rvt_count; i++) |
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45 if ((useid & cli->int_rvt_mask[i]) == |
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46 cli->int_rvt_match[i]) { |
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47 match = 1; |
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48 break; |
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49 } |
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50 if (match) |
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51 forward_pkt_to_client(cli); |
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52 } |
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53 } |
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54 |
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55 forward_nonrvt_pkt() |
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56 { |
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57 struct client *cli; |
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58 |
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59 for (cli = client_head; cli; cli = cli->next) |
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60 if (cli->int_proto[rxpkt[0] - 0x12]) |
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61 forward_pkt_to_client(cli); |
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62 } |