/* * Guillaume Cottenceau (gc@mandrakesoft.com) * * Copyright 2000 MandrakeSoft * * This software may be freely redistributed under the terms of the GNU * public license. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ /* * Portions from Erik Troan (ewt@redhat.com) * * Copyright 1996 Red Hat Software * */ #include #include #include #include #include #include #include #include #include #include #include #include "stage1.h" #include "frontend.h" #include "modules.h" #include "probing.h" #include "log.h" #include "dns.h" #include "mount.h" #include "automatic.h" #include "dhcp.h" #include "url.h" #include "network.h" static void error_message_net(void) /* reduce code size */ { error_message("Could not configure network."); } int configure_net_device(struct interface_info * intf) { struct ifreq req; struct rtentry route; int s; struct sockaddr_in addr; struct in_addr ia; char ip[20], nm[20], nw[20], bc[20]; addr.sin_family = AF_INET; addr.sin_port = 0; memcpy(&ia, &intf->ip, sizeof(intf->ip)); strcpy(ip, inet_ntoa(ia)); memcpy(&ia, &intf->netmask, sizeof(intf->netmask)); strcpy(nm, inet_ntoa(ia)); memcpy(&ia, &intf->broadcast, sizeof(intf->broadcast)); strcpy(bc, inet_ntoa(ia)); memcpy(&ia, &intf->network, sizeof(intf->network)); strcpy(nw, inet_ntoa(ia)); log_message("configuring device %s ip: %s nm: %s nw: %s bc: %s", intf->device, ip, nm, nw, bc); if (IS_TESTING) return 0; s = socket(AF_INET, SOCK_DGRAM, 0); if (s < 0) { log_perror("socket"); error_message_net(); return 1; } strcpy(req.ifr_name, intf->device); if (intf->is_up == 1) { log_message("interface already up, downing before reconfigure"); req.ifr_flags = 0; if (ioctl(s, SIOCSIFFLAGS, &req)) { close(s); log_perror("SIOCSIFFLAGS (downing)"); error_message_net(); return 1; } } /* sets IP address */ addr.sin_port = 0; memcpy(&addr.sin_addr, &intf->ip, sizeof(intf->ip)); memcpy(&req.ifr_addr, &addr, sizeof(addr)); if (ioctl(s, SIOCSIFADDR, &req)) { close(s); log_perror("SIOCSIFADDR"); error_message_net(); return 1; } /* sets broadcast */ memcpy(&addr.sin_addr, &intf->broadcast, sizeof(intf->broadcast)); memcpy(&req.ifr_broadaddr, &addr, sizeof(addr)); if (ioctl(s, SIOCSIFBRDADDR, &req)) { close(s); log_perror("SIOCSIFBRDADDR"); error_message_net(); return 1; } /* sets netmask */ memcpy(&addr.sin_addr, &intf->netmask, sizeof(intf->netmask)); memcpy(&req.ifr_netmask, &addr, sizeof(addr)); if (ioctl(s, SIOCSIFNETMASK, &req)) { close(s); log_perror("SIOCSIFNETMASK"); error_message_net(); return 1; } if (intf->is_ptp) req.ifr_flags = IFF_UP | IFF_RUNNING | IFF_POINTOPOINT | IFF_NOARP; else req.ifr_flags = IFF_UP | IFF_RUNNING | IFF_BROADCAST; /* brings up networking! */ if (ioctl(s, SIOCSIFFLAGS, &req)) { close(s); log_perror("SIOCSIFFLAGS (upping)"); error_message_net(); return 1; } memset(&route, 0, sizeof(route)); route.rt_dev = intf->device; route.rt_flags = RTF_UP; memcpy(&addr.sin_addr, &intf->network, sizeof(intf->network)); memcpy(&route.rt_dst, &addr, sizeof(addr)); memcpy(&addr.sin_addr, &intf->netmask, sizeof(intf->netmask)); memcpy(&route.rt_genmask, &addr, sizeof(addr)); /* adds route */ if (ioctl(s, SIOCADDRT, &route)) { close(s); log_perror("SIOCADDRT"); error_message_net(); return 1; } close(s); intf->is_up = 1; return 0; } /* host network informations */ char * hostname = NULL; char * domain = NULL; struct in_addr gateway = { 0 }; struct in_addr dns_server = { 0 }; struct in_addr dns_server2 = { 0 }; static int add_default_route(void) { int s; struct rtentry route; struct sockaddr_in addr; if (IS_TESTING) return 0; if (gateway.s_addr == 0) { log_message("no gateway provided, can't add default route"); return 0; } s = socket(AF_INET, SOCK_DGRAM, 0); if (s < 0) { close(s); log_perror("socket"); error_message_net(); return 1; } memset(&route, 0, sizeof(route)); addr.sin_family = AF_INET; addr.sin_port = 0; addr.sin_addr = gateway; memcpy(&route.rt_gateway, &addr, sizeof(addr)); addr.sin_addr.s_addr = INADDR_ANY; memcpy(&route.rt_dst, &addr, sizeof(addr)); memcpy(&route.rt_genmask, &addr, sizeof(addr)); route.rt_flags = RTF_UP | RTF_GATEWAY; route.rt_metric = 0; if (ioctl(s, SIOCADDRT, &route)) { close(s); log_perror("SIOCADDRT"); error_message_net(); return 1; } close(s); return 0; } static int write_resolvconf(void) { char * filename = "/etc/resolv.conf"; FILE * f; if (dns_server.s_addr == 0) { log_message("resolvconf needs a dns server"); return -1; } f = fopen(filename, "w"); if (!f) { log_perror(filename); return -1; } if (domain) fprintf(f, "search %s\n", domain); /* we can live without the domain search (user will have to enter fully-qualified names) */ fprintf(f, "nameserver %s\n", inet_ntoa(dns_server)); if (dns_server2.s_addr != 0) fprintf(f, "nameserver %s\n", inet_ntoa(dns_server2)); fclose(f); res_init(); /* reinit the resolver so DNS changes take affect */ return 0; } static int save_netinfo(struct interface_info * intf) { char * file_network = "/tmp/network"; char file_intf[500]; FILE * f; if (dns_server.s_addr == 0) { log_message("resolvconf needs a dns server"); return -1; } f = fopen(file_network, "w"); if (!f) { log_perror(file_network); return -1; } fprintf(f, "NETWORKING=yes\n"); fprintf(f, "FORWARD_IPV4=false\n"); if (hostname) fprintf(f, "HOSTNAME=%s\n", hostname); if (domain) fprintf(f, "DOMAINNAME=%s\n", domain); if (gateway.s_addr != 0) fprintf(f, "GATEWAY=%s\n", inet_ntoa(gateway)); fclose(f); strcpy(file_intf, "/tmp/ifcfg-"); strcat(file_intf, intf->device); f = fopen(file_intf, "w"); if (!f) { log_perror(file_intf); return -1; } fprintf(f, "DEVICE=%s\n", intf->device); if (intf->boot_proto == BOOTPROTO_DHCP) fprintf(f, "BOOTPROTO=dhcp\n"); else { fprintf(f, "BOOTPROTO=static\n"); fprintf(f, "IPADDR=%s\n", inet_ntoa(intf->ip)); fprintf(f, "NETMASK=%s\n", inet_ntoa(intf->netmask)); fprintf(f, "NETWORK=%s\n", inet_ntoa(intf->network)); fprintf(f, "BROADCAST=%s\n", inet_ntoa(intf->broadcast)); } fclose(f); return 0; } char * guess_netmask(char * ip_addr) { struct in_addr addr; unsigned long int tmp; if (!inet_aton(ip_addr, &addr)) return ""; tmp = ntohl(addr.s_addr); if (((tmp & 0xFF000000) >> 24) <= 127) return "255.0.0.0"; else if (((tmp & 0xFF000000) >> 24) <= 191) return "255.255.0.0"; else return "255.255.255.0"; } static void static_ip_callback(char ** strings) { struct in_addr addr; if (!inet_aton(strings[0], &addr)) return; if (!strcmp(strings[1], "")) { char * ptr; strings[1] = strdup(strings[0]); ptr = strrchr(strings[1], '.'); if (ptr) *(ptr+1) = '\0'; } if (!strcmp(strings[2], "")) strings[2] = strdup(strings[1]); if (!strcmp(strings[3], "")) strings[3] = strdup(guess_netmask(strings[0])); } static enum return_type setup_network_interface(struct interface_info * intf) { enum return_type results; char * bootprotos[] = { "Static", "DHCP", NULL }; char * bootprotos_auto[] = { "static", "dhcp" }; char * choice; results = ask_from_list_auto("Please choose the desired IP attribution.", bootprotos, &choice, "network", bootprotos_auto); if (results != RETURN_OK) return results; if (!strcmp(choice, "Static")) { char * questions[] = { "IP of this machine", "IP of DNS", "IP of default gateway", "Netmask", NULL }; char * questions_auto[] = { "ip", "dns", "gateway", "netmask" }; static char ** answers = NULL; struct in_addr addr; results = ask_from_entries_auto("Please enter the network information. (leave netmask void for Internet standard)", questions, &answers, 16, questions_auto, static_ip_callback); if (results != RETURN_OK) return setup_network_interface(intf); if (!inet_aton(answers[0], &addr)) { error_message("Invalid IP address."); return setup_network_interface(intf); } memcpy(&intf->ip, &addr, sizeof(addr)); if (!inet_aton(answers[1], &dns_server)) { log_message("invalid DNS"); dns_server.s_addr = 0; /* keep an understandable state */ } if (!inet_aton(answers[2], &gateway)) { log_message("invalid gateway"); gateway.s_addr = 0; /* keep an understandable state */ } if (!inet_aton(answers[3], &addr)) { log_message("invalid netmask -- back to the guess"); inet_aton(guess_netmask(answers[0]), &addr); } else memcpy(&intf->netmask, &addr, sizeof(addr)); *((uint32_t *) &intf->broadcast) = (*((uint32_t *) &intf->ip) & *((uint32_t *) &intf->netmask)) | ~(*((uint32_t *) &intf->netmask)); inet_aton("255.255.255.255", &addr); if (!memcmp(&addr, &intf->netmask, sizeof(addr))) { log_message("netmask is 255.255.255.255 -> point to point device"); intf->network = gateway; intf->is_ptp = 1; } else { *((uint32_t *) &intf->network) = *((uint32_t *) &intf->ip) & *((uint32_t *) &intf->netmask); intf->is_ptp = 0; } intf->boot_proto = BOOTPROTO_STATIC; } else { results = perform_dhcp(intf); if (results == RETURN_BACK) return setup_network_interface(intf); if (results == RETURN_ERROR) return results; intf->boot_proto = BOOTPROTO_DHCP; } if (configure_net_device(intf)) return RETURN_ERROR; return add_default_route(); } static enum return_type configure_network(struct interface_info * intf) { char ips[50]; char * name; if (hostname && domain) return RETURN_OK; wait_message("Trying to resolve hostname..."); strcpy(ips, inet_ntoa(intf->ip)); name = mygethostbyaddr(ips); remove_wait_message(); if (name) { hostname = strdup(name); domain = strchr(strdup(name), '.') + 1; log_message("got hostname and domain from dns entry, %s and %s", hostname, domain); return RETURN_OK; } log_message("reverse name lookup on self failed"); if (domain) return RETURN_OK; if (dns_server.s_addr != 0) { wait_message("Trying to resolve dns..."); strcpy(ips, inet_ntoa(dns_server)); name = mygethostbyaddr(ips); remove_wait_message(); } if (name) { domain = strchr(strdup(name), '.') + 1; log_message("got domain from DNS fullname, %s", domain); } else { enum return_type results; char * questions[] = { "Host name", "Domain name", NULL }; char * questions_auto[] = { "hostname", "domain" }; static char ** answers = NULL; char * boulet; log_message("reverse name lookup on DNS failed"); results = ask_from_entries_auto("I could not guess hostname and domain name; please fill in this information. " "Valid answers are for example: `mybox' for hostname and `mynetwork.com' for " "domain name, for a machine called `mybox.mynetwork.com' on the Internet.", questions, &answers, 32, questions_auto, NULL); if (results != RETURN_OK) return results; hostname = answers[0]; if ((boulet = strchr(hostname, '.')) != NULL) boulet[0] = '\0'; domain = answers[1]; } return RETURN_OK; } static enum return_type bringup_networking(struct interface_info * intf) { static struct interface_info loopback; enum return_type results = RETURN_ERROR; my_insmod("af_packet", ANY_DRIVER_TYPE, NULL); while (results != RETURN_OK) { results = setup_network_interface(intf); if (results != RETURN_OK) return results; write_resolvconf(); results = configure_network(intf); } write_resolvconf(); /* maybe we have now domain to write also */ if (loopback.is_up == 0) { int rc; strcpy(loopback.device, "lo"); loopback.is_ptp = 0; loopback.is_up = 0; loopback.ip.s_addr = htonl(0x7f000001); loopback.netmask.s_addr = htonl(0xff000000); loopback.broadcast.s_addr = htonl(0x7fffffff); loopback.network.s_addr = htonl(0x7f000000); rc = configure_net_device(&loopback); if (rc) return RETURN_ERROR; } return RETURN_OK; } static char * interface_select(void) { char ** interfaces, ** ptr; char * descriptions[50]; char * choice; int i, count = 0; enum return_type results; interfaces = get_net_devices(); ptr = interfaces; while (ptr && *ptr) { count++; ptr++; } if (count == 0) { error_message("No NET device found."); i = ask_insmod(NETWORK_DEVICES); if (i == RETURN_BACK) return NULL; return interface_select(); } if (count == 1) return *interfaces; i = 0; while (interfaces[i]) { descriptions[i] = get_net_intf_description(interfaces[i]); i++; } results = ask_from_list_comments_auto("Please choose the NET device to use for the installation.", interfaces, descriptions, &choice, "interface", interfaces); if (results != RETURN_OK) return NULL; return choice; } /* -=-=-- */ static enum return_type intf_select_and_up(void) { static struct interface_info intf[20]; static int num_interfaces = 0; struct interface_info * sel_intf = NULL; int i; enum return_type results; char * iface = interface_select(); if (iface == NULL) return RETURN_BACK; for (i = 0; i < num_interfaces ; i++) if (!strcmp(intf[i].device, iface)) sel_intf = &(intf[i]); if (sel_intf == NULL) { sel_intf = &(intf[num_interfaces]); strcpy(sel_intf->device, iface); sel_intf->is_up = 0; num_interfaces++; } results = bringup_networking(sel_intf); if (results == RETURN_OK) save_netinfo(sel_intf); return results; } enum return_type nfs_prepare(void) { char * questions[] = { "NFS server name", DISTRIB_NAME " directory", NULL }; char * questions_auto[] = { "server", "directory", NULL }; static char ** answers = NULL; char * nfsmount_location; enum return_type results = intf_select_and_up(); if (results != RETURN_OK) return results; do { results = ask_from_entries_auto("Please enter the name or IP address of your NFS server, " "and the directory containing the " DISTRIB_NAME " Distribution.", questions, &answers, 40, questions_auto, NULL); if (results != RETURN_OK) return nfs_prepare(); nfsmount_location = malloc(strlen(answers[0]) + strlen(answers[1]) + 2); strcpy(nfsmount_location, answers[0]); strcat(nfsmount_location, ":"); strcat(nfsmount_location, answers[1]); if (my_mount(nfsmount_location, IMAGE_LOCATION, "nfs") == -1) { error_message("I can't mount the directory from the NFS server."); results = RETURN_BACK; continue; } if (access(IMAGE_LOCATION LIVE_LOCATION, R_OK)) { error_message("That NFS volume does not seem to contain the " DISTRIB_NAME " Distribution."); umount(IMAGE_LOCATION); results = RETURN_BACK; } } while (results == RETURN_BACK); log_message("found the " DISTRIB_NAME " Installation, good news!"); if (IS_SPECIAL_STAGE2) { if (load_ramdisk() != RETURN_OK) { error_message("Could not load program into memory."); return nfs_prepare(); } } if (IS_RESCUE) umount(IMAGE_LOCATION); method_name = strdup("nfs"); return RETURN_OK; } enum return_type ftp_prepare(void) { char * questions[] = { "FTP server", DISTRIB_NAME " directory", "Login", "Password", NULL }; char * questions_auto[] = { "server", "directory", "user", "pass", NULL }; static char ** answers = NULL; enum return_type results; if (!ramdisk_possible()) { error_message("FTP install needs more than %d Mbytes of memory (detected %d Mbytes).", MEM_LIMIT_RAMDISK, total_memory()); return RETURN_ERROR; } results = intf_select_and_up(); if (results != RETURN_OK) return results; do { char location_full[500]; int ftp_serv_response; int fd, size; results = ask_from_entries_auto("Please enter the name or IP address of the FTP server, " "the directory containing the " DISTRIB_NAME " Distribution, " "and the login/pass if necessary (leave login blank for anonymous).", questions, &answers, 40, questions_auto, NULL); if (results != RETURN_OK) return ftp_prepare(); log_message("FTP: trying to connect to %s", answers[0]); ftp_serv_response = ftp_open_connection(answers[0], answers[2], answers[3], ""); if (ftp_serv_response < 0) { log_message("FTP: error connect %d", ftp_serv_response); if (ftp_serv_response == FTPERR_BAD_HOSTNAME) error_message("Error: bad hostname."); else if (ftp_serv_response == FTPERR_FAILED_CONNECT) error_message("Error: failed to connect to remote host."); else error_message("Error: couldn't connect."); results = RETURN_BACK; continue; } strcpy(location_full, answers[1]); strcat(location_full, get_ramdisk_realname()); log_message("FTP: trying to retrieve %s", location_full); fd = ftp_start_download(ftp_serv_response, location_full, &size); if (fd < 0) { log_message("FTP: error get %d", fd); if (fd == FTPERR_PASSIVE_ERROR) error_message("Error: error with passive connection."); else if (fd == FTPERR_FILE_NOT_FOUND) error_message("Error: file not found (%s).", location_full); else if (fd == FTPERR_BAD_SERVER_RESPONSE) error_message("Error: bad server response (server too busy?)."); else error_message("Error: couldn't retrieve Installation program."); results = RETURN_BACK; continue; } log_message("FTP: size of download %d bytes", size); results = load_ramdisk_fd(fd, size); if (results == RETURN_OK) ftp_end_data_command(fd); method_name = strdup("ftp"); add_to_env("HOST", answers[0]); add_to_env("PREFIX", answers[1]); if (strcmp(answers[2], "")) { add_to_env("LOGIN", answers[2]); add_to_env("PASSWORD", answers[3]); } } while (results == RETURN_BACK); return RETURN_OK; } enum return_type http_prepare(void) { char * questions[] = { "HTTP server", DISTRIB_NAME " directory", NULL }; char * questions_auto[] = { "server", "directory", NULL }; static char ** answers = NULL; enum return_type results; if (!ramdisk_possible()) { error_message("HTTP install needs more than %d Mbytes of memory (detected %d Mbytes).", MEM_LIMIT_RAMDISK, total_memory()); return RETURN_ERROR; } results = intf_select_and_up(); if (results != RETURN_OK) return results; do { char location_full[500]; int fd; results = ask_from_entries_auto("Please enter the name or IP address of the HTTP server, " "and the directory containing the " DISTRIB_NAME " Distribution.", questions, &answers, 40, questions_auto, NULL); if (results != RETURN_OK) return http_prepare(); strcpy(location_full, answers[1]); strcat(location_full, get_ramdisk_realname()); log_message("HTTP: trying to retrieve %s", location_full); fd = http_download_file(answers[0], location_full); if (fd < 0) { log_message("HTTP: error %d", fd); if (fd == FTPERR_FAILED_CONNECT) error_message("Error: couldn't connect to server."); else error_message("Error: couldn't get file (%s).", location_full); results = RETURN_BACK; continue; } results = load_ramdisk_fd(fd, 0); method_name = strdup("http"); sprintf(location_full, "http://%s/%s", answers[0], answers[1]); add_to_env("URLPREFIX", location_full); } while (results == RETURN_BACK); return RETURN_OK; }