static inline void ipcs_table_refresh_wireless(struct nc_ipcs_table *tbl, int fd) { struct nc_ipcs_table_item *ipc = NULL; char iface_name[32]; uint8_t hwaddr[ETH_ALEN] = {0}; uint32_t src_ip = 0; int ret = -1; int i; if (tbl->wireless_enable == 0) { return ; } sprintf(iface_name, "%s.%d", tbl->iface_name, NC_WIRELESS_VID); ret = get_iface_addr(iface_name, hwaddr, ETH_ALEN, &src_ip); if (ret < 0) { return ; } if (tbl->wireless_enable) { for (i = 0; i < NC_WIRELESS_SZ; ++i) { ipc = &tbl->wireless_ipcs[i]; if (ipc->alive_sec < 0) { continue; } if (ipc->alive_sec == 0) { send_ipc_info(tbl, -1, ipc->mac, ipc->ip, 1); } else { if ((ipc->alive_sec & 0x1) == 0x1) { st_dbg("send to \n"); send_arp_req(fd, hwaddr, src_ip, ipc->ip, NULL, 0); } } } } }
int send_arp_reqs() { int sock, i; if ((sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ARP))) == -1) { printf("send_arp_reqs: socket: %s\n", strerror(errno)); return 1; } for (i = 0; i < nh; i++) send_arp_req(sock, hosts[i].ipaddr); close(sock); return 0; }
static int recv_onvif_probematch( struct nc_ipcs_table *tbl, int arp_fd, int port_idx, char *probematch, int pm_len, struct sockaddr_in *addr ) { char iface_name[32]; uint8_t hwaddr[ETH_ALEN] = {0}; uint32_t src_ip = 0; uint32_t tgt_ip = addr->sin_addr.s_addr; struct sockaddr_ll hw_sa; int ret = -1; if (port_idx < 0) { sprintf(iface_name, "%s.%d", tbl->iface_name, NC_WIRELESS_VID); } else { sprintf(iface_name, "%s.%d", tbl->iface_name, NC_WIRE_VID_START + port_idx); } ret = get_iface_addr(iface_name, hwaddr, ETH_ALEN, &src_ip); if (ret < 0) { return -1; } memset(&hw_sa, 0, sizeof(hw_sa)); hw_sa.sll_family = AF_PACKET; hw_sa.sll_protocol = htons(ETH_P_ARP); hw_sa.sll_ifindex = if_nametoindex(iface_name); hw_sa.sll_halen = ETH_ALEN; memcpy(hw_sa.sll_addr, hwaddr, ETH_ALEN); return send_arp_req(arp_fd, hwaddr, src_ip, tgt_ip, &hw_sa, sizeof(hw_sa)); }
static inline void ipcs_table_refresh_wire(struct nc_ipcs_table *tbl, int *fds) { struct nc_ipcs_table_item *ipc = NULL; int i; for (i = 0; i < tbl->wire_cnt; ++i) { ipc = &tbl->wire_ipcs[i]; if (ipc->alive_sec < 0) { continue; } if (ipc->alive_sec == 0) { send_ipc_info(tbl, i, ipc->mac, ipc->ip, 1); } else { char iface_name[32]; uint8_t hwaddr[ETH_ALEN] = {0}; uint32_t src_ip = 0; int ret = -1; sprintf(iface_name, "%s.%d", tbl->iface_name, NC_WIRE_VID_START + i); ret = get_iface_addr(iface_name, hwaddr, ETH_ALEN, &src_ip); if (ret < 0) { continue; } send_arp_req(fds[i], hwaddr, src_ip, ipc->ip, NULL, 0); } } }
int handle_rtm_newroute(const struct nlmsghdr *nl){ const struct rtmsg *rt = NLMSG_DATA(nl); struct rtattr *ra; void *as,*ad,*ag; int rlen,oif; route *r,**prev; size_t flen; oif = -1; if((r = create_route()) == NULL){ return -1; } switch( (r->family = rt->rtm_family) ){ case AF_INET:{ flen = sizeof(uint32_t); as = &((struct sockaddr_in *)&r->sss)->sin_addr; ad = &((struct sockaddr_in *)&r->ssd)->sin_addr; ag = &((struct sockaddr_in *)&r->ssg)->sin_addr; break;}case AF_INET6:{ flen = sizeof(uint32_t) * 4; as = &((struct sockaddr_in6 *)&r->sss)->sin6_addr; ad = &((struct sockaddr_in6 *)&r->ssd)->sin6_addr; ag = &((struct sockaddr_in6 *)&r->ssg)->sin6_addr; break;}case AF_BRIDGE:{ // FIXME wtf is a bridge route diagnostic("got a bridge route hrmmm FIXME"); return -1; // FIXME break;}default:{ flen = 0; break;} } r->maskbits = rt->rtm_dst_len; if(flen == 0 || flen > sizeof(r->sss.__ss_padding)){ diagnostic("Unknown route family %u",rt->rtm_family); return -1; } rlen = nl->nlmsg_len - NLMSG_LENGTH(sizeof(*rt)); ra = (struct rtattr *)((char *)(NLMSG_DATA(nl)) + sizeof(*rt)); memset(&r->ssg,0,sizeof(r->ssg)); memset(&r->ssd,0,sizeof(r->ssd)); memset(&r->sss,0,sizeof(r->sss)); while(RTA_OK(ra,rlen)){ switch(ra->rta_type){ case RTA_DST:{ if(RTA_PAYLOAD(ra) != flen){ diagnostic("Expected %zu dst bytes, got %zu", flen,RTA_PAYLOAD(ra)); break; } if(r->ssd.ss_family){ diagnostic("Got two destinations for route"); break; } memcpy(ad,RTA_DATA(ra),flen); r->ssd.ss_family = r->family; break;}case RTA_PREFSRC: case RTA_SRC:{ // FIXME do we not want to prefer PREFSRC? if(RTA_PAYLOAD(ra) != flen){ diagnostic("Expected %zu src bytes, got %zu", flen,RTA_PAYLOAD(ra)); break; } if(r->sss.ss_family){ diagnostic("Got two sources for route"); break; } memcpy(as,RTA_DATA(ra),flen); r->sss.ss_family = r->family; break;}case RTA_IIF:{ if(RTA_PAYLOAD(ra) != sizeof(int)){ diagnostic("Expected %zu iiface bytes, got %zu", sizeof(int),RTA_PAYLOAD(ra)); break; } // we don't use RTA_OIF: iif = *(int *)RTA_DATA(ra); break;}case RTA_OIF:{ if(RTA_PAYLOAD(ra) != sizeof(int)){ diagnostic("Expected %zu oiface bytes, got %zu", sizeof(int),RTA_PAYLOAD(ra)); break; } oif = *(int *)RTA_DATA(ra); break;}case RTA_GATEWAY:{ if(RTA_PAYLOAD(ra) != flen){ diagnostic("Expected %zu gw bytes, got %zu", flen,RTA_PAYLOAD(ra)); break; } if(r->ssg.ss_family){ diagnostic("Got two gateways for route"); break; } // We get 0.0.0.0 as the gateway when there's no 'via' if(memcmp(ag,RTA_DATA(ra),flen)){ memcpy(ag,RTA_DATA(ra),flen); r->ssg.ss_family = r->family; } break;}case RTA_PRIORITY:{ break;}case RTA_METRICS:{ break;}case RTA_MULTIPATH:{ // break;}case RTA_PROTOINFO:{ // unused break;}case RTA_FLOW:{ break;}case RTA_CACHEINFO:{ // break;}case RTA_SESSION:{ // unused // break;}case RTA_MP_ALGO:{ // unused break;}case RTA_TABLE:{ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36) break;}case RTA_MARK:{ #endif break;}case RTA_MFC_STATS:{ break;}case RTA_VIA:{ break;}case RTA_NEWDST:{ break;}case RTA_PREF:{ break;}case RTA_ENCAP_TYPE:{ break;}case RTA_ENCAP:{ break;}case RTA_EXPIRES:{ break;}case RTA_PAD:{ break;}default:{ diagnostic("Unknown rtatype %u",ra->rta_type); break;}} ra = RTA_NEXT(ra,rlen); } if(rlen){ diagnostic("%d excess bytes on newlink message",rlen); } if((r->iface = iface_by_idx(oif)) == NULL){ diagnostic("Unknown output interface %d on %s",oif,r->iface->name); goto err; } { char str[INET6_ADDRSTRLEN],via[INET6_ADDRSTRLEN]; inet_ntop(rt->rtm_family,ad,str,sizeof(str)); inet_ntop(rt->rtm_family,ag,via,sizeof(via)); diagnostic("[%s] new route to %s/%u %ls%ls%s", r->iface->name,str,r->maskbits, rt->rtm_type == RTN_LOCAL ? L"(local)" : rt->rtm_type == RTN_BROADCAST ? L"(broadcast)" : rt->rtm_type == RTN_UNREACHABLE ? L"(unreachable)" : rt->rtm_type == RTN_ANYCAST ? L"(anycast)" : rt->rtm_type == RTN_UNICAST ? L"(unicast)" : rt->rtm_type == RTN_MULTICAST ? L"(multicast)" : rt->rtm_type == RTN_BLACKHOLE ? L"(blackhole)" : rt->rtm_type == RTN_MULTICAST ? L"(multicast)" : L"", r->ssg.ss_family ? L" via " : L"", r->ssg.ss_family ? via : ""); } // We're not interest in blackholes, unreachables, prohibits, NATs yet if(rt->rtm_type != RTN_UNICAST && rt->rtm_type != RTN_LOCAL && rt->rtm_type != RTN_BROADCAST && rt->rtm_type != RTN_ANYCAST && rt->rtm_type != RTN_MULTICAST){ free_route(r); return 0; } assert(r->iface); if(!r->sss.ss_family){ struct routepath rp; if(get_router(r->sss.ss_family,ad,&rp) == 0){ if(r->sss.ss_family == AF_INET){ memcpy(as,rp.src,4); }else if(r->sss.ss_family == AF_INET6){ memcpy(as,rp.src,16); }else{ assert(0); } }else{ // FIXME vicious hackery! if(r->family == AF_INET6){ memcpy(as,r->iface->ip6defsrc,flen); r->sss.ss_family = AF_INET6; } } } if(r->family == AF_INET){ lock_interface(r->iface); if(add_route4(r->iface,ad,r->ssg.ss_family ? ag : NULL, r->sss.ss_family ? as : NULL, r->maskbits)){ unlock_interface(r->iface); diagnostic("Couldn't add route to %s",r->iface->name); goto err; } if(r->ssg.ss_family){ send_arp_req(r->iface,r->iface->bcast,ag,as); } unlock_interface(r->iface); pthread_mutex_lock(&route_lock); prev = &ip_table4; // Order most-specific (largest maskbits) to least-specific (0 maskbits) while(*prev){ if(r->maskbits > (*prev)->maskbits){ break; } prev = &(*prev)->next; } r->next = *prev; *prev = r; if(r->sss.ss_family){ while( *(prev = &(*prev)->next) ){ assert((*prev)->maskbits < r->maskbits); if(!((*prev)->sss.ss_family)){ memcpy(&(*prev)->sss,&r->sss,sizeof(r->sss)); } } } pthread_mutex_unlock(&route_lock); }else if(r->family == AF_INET6){ lock_interface(r->iface); if(add_route6(r->iface,ad,r->ssg.ss_family ? ag : NULL,r->sss.ss_family ? as : NULL,r->maskbits)){ unlock_interface(r->iface); diagnostic("Couldn't add route to %s",r->iface->name); goto err; } unlock_interface(r->iface); pthread_mutex_lock(&route_lock); prev = &ip_table6; // Order most-specific (largest maskbits) to least-specific (0 maskbits) while(*prev){ if(r->maskbits > (*prev)->maskbits){ break; } prev = &(*prev)->next; } r->next = *prev; *prev = r; // FIXME set less-specific sources pthread_mutex_unlock(&route_lock); } return 0; err: free_route(r); return -1; }