node/publish.c

   1 #include <avahi-client/publish.h>
   2 #include <avahi-client/lookup.h>
   3
   4 #include <avahi-common/alternative.h>
   5 #include <avahi-common/simple-watch.h>
   6 #include <avahi-common/malloc.h>
   7 #include <avahi-common/error.h>
   8 #include <avahi-common/timeval.h>
   9 #include <avahi-common/strlst.h>
  10
  11 #include <libvirt/libvirt.h>
  12
  13 #include "node.h"
  14
  15 struct list_el {
  16     unsigned int domainid;
  17     AvahiEntryGroup *group;
  18     unsigned short keep;
  19 };
  20
  21 typedef struct list_el domu;
  22
  23 domu * domus = NULL; /* list of domains */
  24 unsigned int domu_count = 0;
  25
  26
  27 static AvahiStringList * domainProperties(virDomainPtr thisDomain) {
  28     AvahiStringList *new = NULL;
  29     // avahi_string_list_new_from_array (NULL, 0);
  30     virDomainInfo info;
  31     virDomainInterfaceStatsStruct stats;
  32     virDomainGetInfo(thisDomain, &info);
  33     new = avahi_string_list_add_printf(new, "maxMem=%lu", info.maxMem);
  34     new = avahi_string_list_add_printf(new, "memory=%lu", info.memory);
  35     new = avahi_string_list_add_printf(new, "cpuTime=%llu", info.cpuTime);
  36
  37     /* TODO: multiple network interfaces :( */
  38     char vifname[16];
  39     snprintf(vifname, 14, "vif%d.0", virDomainGetID(thisDomain));
  40     vifname[15] = '\0';
  41     unsigned int no = 0;
  42
  43     virDomainInterfaceStats(thisDomain, vifname, &stats, sizeof(stats));
  44
  45     new = avahi_string_list_add_printf(new, "interfaces=eth%d", no);
  46     new = avahi_string_list_add_printf(new, "interface_eth%d_rxbytes=%lld",   no, stats.rx_bytes);
  47     new = avahi_string_list_add_printf(new, "interface_eth%d_rxpackets=%lld", no, stats.rx_packets);
  48 //    new = avahi_string_list_add_printf(new, "interface_eth%d_rxerrs=%lld",    no, stats.rx_errs);
  49 //    new = avahi_string_list_add_printf(new, "interface_eth%d_rxdrop=%lld",    no, stats.rx_drop);
  50     new = avahi_string_list_add_printf(new, "interface_eth%d_txbytes=%lld",   no, stats.tx_bytes);
  51     new = avahi_string_list_add_printf(new, "interface_eth%d_txpackets=%lld", no, stats.tx_packets);
  52 //    new = avahi_string_list_add_printf(new, "interface_eth%d_txerrs=%lld",    no, stats.tx_errs);
  53 //    new = avahi_string_list_add_printf(new, "interface_eth%d_txdrop=%lld",    no, stats.tx_drop);
  54
  55     return new;
  56 }
  57
  58
  59 void create_services(AvahiClient *c) {
  60     virConnectPtr conn = virConnectOpenReadOnly(NULL);
  61     if (conn == NULL)
  62         return;
  63     int maxid = virConnectNumOfDomains(conn);
  64     if (maxid > 1) { /* ignore dom0 */
  65         int *ids = (int *) malloc(sizeof(int) * maxid);
  66         if ((maxid = virConnectListDomains(conn, &ids[0], maxid)) < 0) {
  67             // error
  68         } else {
  69             int i;
  70             unsigned int domu_count_new = (maxid - 1);
  71             domu * domus_old = domus;
  72             domus = (domu *) malloc(sizeof(domu) * domu_count_new);
  73             const char *type = "_domu._tcp";
  74             for (i = 0; i < domu_count_new; i++) {
  75                 int j;
  76                 domus[i].group = NULL;
  77                 domus[i].domainid = ids[i+1];
  78                 domus[i].keep = 0;
  79
  80                 //fprintf(stderr, "Looking for %d\n", domus[i].domainid);
  81
  82                 for (j = 0; j < domu_count; j++) {
  83                     //fprintf(stderr, "--> %d\n", domus_old[j].domainid);
  84                     if (ids[i+1] == domus_old[j].domainid) {
  85                         //fprintf(stderr, "got it\n");
  86                         virDomainPtr thisDomain = virDomainLookupByID(conn, domus[i].domainid);
  87                         domus[i].group = domus_old[j].group;
  88                         if (thisDomain) {
  89                             const char *name = virDomainGetName(thisDomain);
  90                             if (name) {
  91                                 AvahiStringList *domainProps;
  92                                 domainProps = domainProperties(thisDomain);
  93                                 domus_old[j].keep = 1;
  94                                 avahi_entry_group_update_service_txt_strlst(domus[i].group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, type, NULL, domainProps);
  95                                 avahi_string_list_free(domainProps);
  96                             } else {
  97                                 // domus_old[j].keep = 0;
  98                             }
  99                         } else {
 100                             // domus_old[j].keep = 0;
 101                         }
 102                         virDomainFree(thisDomain);
 103                     }
 104                 }
 105                 if (i > domu_count || domus[i].group == NULL) {
 106                     const char *name;
 107                     AvahiStringList *domainProps;
 108                     virDomainPtr thisDomain = virDomainLookupByID(conn, ids[i+1]);
 109                     domus[i].group = avahi_entry_group_new(c, entry_group_callback, NULL);
 110                     domainProps = domainProperties(thisDomain);
 111                     name = virDomainGetName(thisDomain);
 112
 113                     if (name) {
 114                         avahi_entry_group_add_service_strlst(domus[i].group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, type, NULL, NULL, 651, domainProps);
 115                         avahi_entry_group_commit(domus[i].group);
 116                     } else {
 117                         domus[i].keep = 0;
 118                     }
 119
 120                     avahi_string_list_free(domainProps);
 121                     virDomainFree(thisDomain);
 122
 123                 }
 124             }
 125
 126             for (i = 0; i < domu_count; i++) {
 127                 // fprintf(stderr, "id: %d, keep: %d\n", domus_old[i].domainid, domus_old[i].keep);
 128                 if (domus_old[i].keep == 0 && domus_old[i].group != NULL) {
 129                     avahi_entry_group_free(domus_old[i].group);
 130                 }
 131             }
 132
 133             free(domus_old);
 134             domu_count = domu_count_new;
 135         }
 136         free(ids);
 137     }
 138     virConnectClose(conn);
 139     //fprintf(stderr, "exit: %s\n", __func__);
 140 }
 141