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teknoraver

host_uniq

teknoraver
Nov 14th, 2014
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  1. --- a/pppd/plugins/rp-pppoe/common.c
  2. +++ b/pppd/plugins/rp-pppoe/common.c
  3. @@ -121,13 +121,13 @@ sendPADT(PPPoEConnection *conn, char con
  4.      /* If we're using Host-Uniq, copy it over */
  5.      if (conn->useHostUniq) {
  6.     PPPoETag hostUniq;
  7. -   pid_t pid = getpid();
  8. +   int len = strlen(conn->useHostUniq);
  9.     hostUniq.type = htons(TAG_HOST_UNIQ);
  10. -   hostUniq.length = htons(sizeof(pid));
  11. -   memcpy(hostUniq.payload, &pid, sizeof(pid));
  12. -   memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
  13. -   cursor += sizeof(pid) + TAG_HDR_SIZE;
  14. -   plen += sizeof(pid) + TAG_HDR_SIZE;
  15. +   hostUniq.length = htons(len);
  16. +   memcpy(hostUniq.payload, conn->useHostUniq, len);
  17. +   memcpy(cursor, &hostUniq, len + TAG_HDR_SIZE);
  18. +   cursor += len + TAG_HDR_SIZE;
  19. +   plen += len + TAG_HDR_SIZE;
  20.      }
  21.  
  22.      /* Copy error message */
  23. --- a/pppd/plugins/rp-pppoe/discovery.c
  24. +++ b/pppd/plugins/rp-pppoe/discovery.c
  25. @@ -104,7 +104,7 @@ parseForHostUniq(UINT16_t type, UINT16_t
  26.  static int
  27.  packetIsForMe(PPPoEConnection *conn, PPPoEPacket *packet)
  28.  {
  29. -    int forMe = 0;
  30. +    char *uniq = conn->useHostUniq;
  31.  
  32.      /* If packet is not directed to our MAC address, forget it */
  33.      if (memcmp(packet->ethHdr.h_dest, conn->myEth, ETH_ALEN)) return 0;
  34. @@ -112,8 +112,8 @@ packetIsForMe(PPPoEConnection *conn, PPP
  35.      /* If we're not using the Host-Unique tag, then accept the packet */
  36.      if (!conn->useHostUniq) return 1;
  37.  
  38. -    parsePacket(packet, parseForHostUniq, &forMe);
  39. -    return forMe;
  40. +    parsePacket(packet, parseForHostUniq, &uniq);
  41. +    return uniq != 0;
  42.  }
  43.  
  44.  /**********************************************************************
  45. @@ -303,14 +303,14 @@ sendPADI(PPPoEConnection *conn)
  46.      /* If we're using Host-Uniq, copy it over */
  47.      if (conn->useHostUniq) {
  48.     PPPoETag hostUniq;
  49. -   pid_t pid = getpid();
  50. +   int len = strlen(conn->useHostUniq);
  51.     hostUniq.type = htons(TAG_HOST_UNIQ);
  52. -   hostUniq.length = htons(sizeof(pid));
  53. -   memcpy(hostUniq.payload, &pid, sizeof(pid));
  54. -   CHECK_ROOM(cursor, packet.payload, sizeof(pid) + TAG_HDR_SIZE);
  55. -   memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
  56. -   cursor += sizeof(pid) + TAG_HDR_SIZE;
  57. -   plen += sizeof(pid) + TAG_HDR_SIZE;
  58. +   hostUniq.length = htons(len);
  59. +   memcpy(hostUniq.payload, conn->useHostUniq, len);
  60. +   CHECK_ROOM(cursor, packet.payload, len + TAG_HDR_SIZE);
  61. +   memcpy(cursor, &hostUniq, len + TAG_HDR_SIZE);
  62. +   cursor += len + TAG_HDR_SIZE;
  63. +   plen += len + TAG_HDR_SIZE;
  64.      }
  65.  
  66.      /* Add our maximum MTU/MRU */
  67. @@ -480,14 +480,14 @@ sendPADR(PPPoEConnection *conn)
  68.      /* If we're using Host-Uniq, copy it over */
  69.      if (conn->useHostUniq) {
  70.     PPPoETag hostUniq;
  71. -   pid_t pid = getpid();
  72. +   int len = strlen(conn->useHostUniq);
  73.     hostUniq.type = htons(TAG_HOST_UNIQ);
  74. -   hostUniq.length = htons(sizeof(pid));
  75. -   memcpy(hostUniq.payload, &pid, sizeof(pid));
  76. -   CHECK_ROOM(cursor, packet.payload, sizeof(pid)+TAG_HDR_SIZE);
  77. -   memcpy(cursor, &hostUniq, sizeof(pid) + TAG_HDR_SIZE);
  78. -   cursor += sizeof(pid) + TAG_HDR_SIZE;
  79. -   plen += sizeof(pid) + TAG_HDR_SIZE;
  80. +   hostUniq.length = htons(len);
  81. +   memcpy(hostUniq.payload, conn->useHostUniq, len);
  82. +   CHECK_ROOM(cursor, packet.payload, len+TAG_HDR_SIZE);
  83. +   memcpy(cursor, &hostUniq, len + TAG_HDR_SIZE);
  84. +   cursor += len + TAG_HDR_SIZE;
  85. +   plen += len + TAG_HDR_SIZE;
  86.      }
  87.  
  88.      /* Add our maximum MTU/MRU */
  89. --- a/pppd/plugins/rp-pppoe/plugin.c
  90. +++ b/pppd/plugins/rp-pppoe/plugin.c
  91. @@ -65,6 +65,7 @@ static char *existingSession = NULL;
  92.  static int printACNames = 0;
  93.  static char *pppoe_reqd_mac = NULL;
  94.  unsigned char pppoe_reqd_mac_addr[6];
  95. +static char *host_uniq = NULL;
  96.  
  97.  static int PPPoEDevnameHook(char *cmd, char **argv, int doit);
  98.  static option_t Options[] = {
  99. @@ -82,6 +83,8 @@ static option_t Options[] = {
  100.        "Be verbose about discovered access concentrators"},
  101.      { "pppoe-mac", o_string, &pppoe_reqd_mac,
  102.        "Only connect to specified MAC address" },
  103. +    { "host-uniq", o_string, &host_uniq,
  104. +      "Specify custom Host-Uniq" },
  105.      { NULL }
  106.  };
  107.  int (*OldDevnameHook)(char *cmd, char **argv, int doit) = NULL;
  108. @@ -107,7 +110,7 @@ PPPOEInitDevice(void)
  109.      conn->ifName = devnam;
  110.      conn->discoverySocket = -1;
  111.      conn->sessionSocket = -1;
  112. -    conn->useHostUniq = 1;
  113. +    conn->useHostUniq = NULL;
  114.      conn->printACNames = printACNames;
  115.      conn->discoveryTimeout = PADI_TIMEOUT;
  116.      return 1;
  117. @@ -163,6 +166,9 @@ PPPOEConnectDevice(void)
  118.      if (lcp_wantoptions[0].mru > ifr.ifr_mtu - TOTAL_OVERHEAD)
  119.     lcp_wantoptions[0].mru = ifr.ifr_mtu - TOTAL_OVERHEAD;
  120.  
  121. +    if(host_uniq)
  122. +   conn->useHostUniq = host_uniq;
  123. +
  124.      conn->acName = acName;
  125.      conn->serviceName = pppd_pppoe_service;
  126.      strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam));
  127. --- a/pppd/plugins/rp-pppoe/pppoe-discovery.c
  128. +++ b/pppd/plugins/rp-pppoe/pppoe-discovery.c
  129. @@ -641,7 +641,7 @@ int main(int argc, char *argv[])
  130.  
  131.      memset(conn, 0, sizeof(PPPoEConnection));
  132.  
  133. -    while ((opt = getopt(argc, argv, "I:D:VUAS:C:h")) > 0) {
  134. +    while ((opt = getopt(argc, argv, "I:D:VUW:AS:C:h")) > 0) {
  135.     switch(opt) {
  136.     case 'S':
  137.         conn->serviceName = xstrdup(optarg);
  138. @@ -650,7 +650,19 @@ int main(int argc, char *argv[])
  139.         conn->acName = xstrdup(optarg);
  140.         break;
  141.     case 'U':
  142. -       conn->useHostUniq = 1;
  143. +       if(conn->useHostUniq) {
  144. +       fprintf(stderr, "-U and -W are mutually exclusive\n");
  145. +       exit(EXIT_FAILURE);
  146. +       }
  147. +       conn->useHostUniq = malloc(12);
  148. +       sprintf(conn->useHostUniq, "%d", getpid());
  149. +       break;
  150. +   case 'W':
  151. +       if(conn->useHostUniq) {
  152. +       fprintf(stderr, "-U and -W are mutually exclusive\n");
  153. +       exit(EXIT_FAILURE);
  154. +       }
  155. +       conn->useHostUniq = xstrdup(optarg);
  156.         break;
  157.     case 'D':
  158.         conn->debugFile = fopen(optarg, "w");
  159. --- a/pppd/plugins/rp-pppoe/pppoe.h
  160. +++ b/pppd/plugins/rp-pppoe/pppoe.h
  161. @@ -224,7 +224,7 @@ typedef struct PPPoEConnectionStruct {
  162.      char *serviceName;     /* Desired service name, if any */
  163.      char *acName;      /* Desired AC name, if any */
  164.      int synchronous;       /* Use synchronous PPP */
  165. -    int useHostUniq;       /* Use Host-Uniq tag */
  166. +    char *useHostUniq;     /* Use Host-Uniq tag */
  167.      int printACNames;      /* Just print AC names */
  168.      FILE *debugFile;       /* Debug file for dumping packets */
  169.      int numPADOs;      /* Number of PADO packets received */
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