bin/misc/fce.c

   1 #ifdef HAVE_CONFIG_H
   2 #include "config.h"
   3 #endif /* HAVE_CONFIG_H */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <unistd.h>
   8 #include <errno.h>
   9 #include <string.h>
  10 #include <sys/types.h>
  11 #include <sys/socket.h>
  12 #include <netinet/in.h>
  13 #include <arpa/inet.h>
  14 #include <netdb.h>
  15 #include <inttypes.h>
  16 #include <sys/types.h>
  17 #include <sys/param.h>
  18
  19 #include <atalk/fce_api.h>
  20 #include <atalk/util.h>
  21
  22 #define MAXBUFLEN 1024
  23
  24 static char *fce_ev_names[] = {
  25     "",
  26     "FCE_FILE_MODIFY",
  27     "FCE_FILE_DELETE",
  28     "FCE_DIR_DELETE",
  29     "FCE_FILE_CREATE",
  30     "FCE_DIR_CREATE",
  31     "FCE_TM_SIZE"
  32 };
  33
  34 // get sockaddr, IPv4 or IPv6:
  35 static void *get_in_addr(struct sockaddr *sa)
  36 {
  37     if (sa->sa_family == AF_INET) {
  38         return &(((struct sockaddr_in*)sa)->sin_addr);
  39     }
  40
  41     return &(((struct sockaddr_in6*)sa)->sin6_addr);
  42 }
  43
  44 static int unpack_fce_packet(unsigned char *buf, struct fce_packet *packet)
  45 {
  46     unsigned char *p = buf;
  47
  48     memcpy(&packet->magic[0], p, sizeof(packet->magic));
  49     p += sizeof(packet->magic);
  50
  51     packet->version = *p;
  52     p++;
  53
  54     packet->mode = *p;
  55     p++;
  56
  57     memcpy(&packet->event_id, p, sizeof(packet->event_id));
  58     p += sizeof(packet->event_id);
  59     packet->event_id = ntohl(packet->event_id);
  60
  61     memcpy(&packet->datalen, p, sizeof(packet->datalen));
  62     p += sizeof(packet->datalen);
  63     packet->datalen = ntohs(packet->datalen);
  64
  65     memcpy(&packet->data[0], p, packet->datalen);
  66     p += packet->datalen;
  67
  68     return 0;
  69 }
  70
  71 int main(void)
  72 {
  73     int sockfd;
  74     struct addrinfo hints, *servinfo, *p;
  75     int rv;
  76     int numbytes;
  77     struct sockaddr_storage their_addr;
  78     char buf[MAXBUFLEN];
  79     socklen_t addr_len;
  80     char s[INET6_ADDRSTRLEN];
  81     uint64_t tmsize;
  82
  83     memset(&hints, 0, sizeof hints);
  84     hints.ai_family = AF_UNSPEC; // set to AF_INET to force IPv4
  85     hints.ai_socktype = SOCK_DGRAM;
  86
  87     if ((rv = getaddrinfo(NULL, FCE_DEFAULT_PORT_STRING, &hints, &servinfo)) != 0) {
  88         fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
  89         return 1;
  90     }
  91
  92     // loop through all the results and bind to the first we can
  93     for(p = servinfo; p != NULL; p = p->ai_next) {
  94         if ((sockfd = socket(p->ai_family, p->ai_socktype,
  95                              p->ai_protocol)) == -1) {
  96             perror("listener: socket");
  97             continue;
  98         }
  99
 100         if (bind(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
 101             close(sockfd);
 102             perror("listener: bind");
 103             continue;
 104         }
 105
 106         break;
 107     }
 108
 109     if (p == NULL) {
 110         fprintf(stderr, "listener: failed to bind socket\n");
 111         return 2;
 112     }
 113
 114     freeaddrinfo(servinfo);
 115
 116     printf("listener: waiting to recvfrom...\n");
 117
 118     addr_len = sizeof their_addr;
 119
 120     struct fce_packet packet;
 121     while (1) {
 122         if ((numbytes = recvfrom(sockfd,
 123                                  buf,
 124                                  MAXBUFLEN - 1,
 125                                  0,
 126                                  (struct sockaddr *)&their_addr,
 127                                  &addr_len)) == -1) {
 128             perror("recvfrom");
 129             exit(1);
 130         }
 131
 132         unpack_fce_packet(buf, &packet);
 133
 134         if (memcmp(packet.magic, FCE_PACKET_MAGIC, sizeof(packet.magic)) == 0) {
 135
 136             switch (packet.mode) {
 137             case FCE_TM_SIZE:
 138                 memcpy(&tmsize, packet.data, sizeof(uint64_t));
 139                 tmsize = ntoh64(tmsize);
 140                 printf("ID: %" PRIu32 ", Event: %s, Volume: %s, TM used size: %" PRIu64 " \n",
 141                        packet.event_id, fce_ev_names[packet.mode], packet.data + sizeof(uint64_t), tmsize);
 142                 break;
 143
 144             case FCE_CONN_START:
 145                 printf("FCE Start\n");
 146                 break;
 147
 148             case FCE_CONN_BROKEN:
 149                 printf("Broken FCE connection\n");
 150                 break;
 151
 152             default:
 153                 printf("ID: %" PRIu32 ", Event: %s, Path: %s\n",
 154                        packet.event_id, fce_ev_names[packet.mode], packet.data);
 155                 break;
 156             }
 157         }
 158     }
 159
 160     close(sockfd);
 161     return 0;
 162 }