diff options
Diffstat (limited to 'toys/samsung/nslookup.c')
| -rw-r--r-- | toys/samsung/nslookup.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/toys/samsung/nslookup.c b/toys/samsung/nslookup.c deleted file mode 100644 index ac8f8ec..0000000 --- a/toys/samsung/nslookup.c +++ /dev/null @@ -1,181 +0,0 @@ -/* nslookup.c - query Internet name servers - * - * Copyright 2013 Ashwini Kumar <ak.ashwini@gmail.com> - * Copyright 2015 Rajni Kant <rajnikant12345@gmail.com> - * - -USE_NSLOOKUP(NEWTOY(nslookup, "<1?", TOYFLAG_USR|TOYFLAG_BIN)) - -config NSLOOKUP - bool "nslookup" - default y - help - usage: nslookup [HOST] [SERVER] - - Query the nameserver for the IP address of the given HOST - optionally using a specified DNS server. - - Note:- Only non-interactive mode is supported. -*/ - -#define FOR_nslookup -#include "toys.h" -#include <resolv.h> - -static char *address_to_name(struct sockaddr *sock) -{ - //man page of getnameinfo. - char hbuf[NI_MAXHOST] = {0,}, sbuf[NI_MAXSERV] = {0,}; - int status = 0; - if (sock->sa_family == AF_INET) { - socklen_t len = sizeof(struct sockaddr_in); - if ((status = getnameinfo(sock, len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), - NI_NUMERICHOST | NI_NUMERICSERV)) == 0) - return xmprintf("%s:%s", hbuf, sbuf); - else { - fprintf(stderr, "getnameinfo: %s\n", gai_strerror(status)); - return NULL; - } - } - else if (sock->sa_family == AF_INET6) { - socklen_t len = sizeof(struct sockaddr_in6); - if ((status = getnameinfo(sock, len, hbuf, sizeof(hbuf), sbuf, - sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV)) == 0) { - //verification for resolved hostname. - if (strchr(hbuf, ':')) return xmprintf("[%s]:%s", hbuf, sbuf); - else return xmprintf("%s:%s", hbuf, sbuf); - } - else { - fprintf(stderr, "getnameinfo: %s\n", gai_strerror(status)); - return NULL; - } - } - else if (sock->sa_family == AF_UNIX) { - struct sockaddr_un *sockun = (void*)sock; - return xmprintf("local:%.*s", (int) sizeof(sockun->sun_path), sockun->sun_path); - } - return NULL; -} - -static void print_addrs(char *hostname, char *msg) -{ - struct addrinfo hints, *res = NULL, *cur = NULL; - int ret_ga; - char *n = xstrdup(hostname), *p, *tmp; - tmp = n; - if ((*n == '[') && (p = strrchr(n, ']')) != NULL ) { - n++; - *p = '\0'; - } - - memset(&hints, 0, sizeof(struct addrinfo)); - hints.ai_socktype = SOCK_STREAM; - - ret_ga = getaddrinfo(n, NULL, &hints, &res); - if (ret_ga) perror_exit("Hostname %s", gai_strerror(ret_ga)); - - cur = res; - while(cur) { - char *colon = NULL; - char *name = address_to_name(cur->ai_addr); - if (name) { - colon = strrchr(name, ':'); - if (colon) *colon = '\0'; - xprintf("%-8s %s\n",msg, hostname); - xprintf("Address: %s\n", name); - free(name); - } - cur = cur->ai_next; - } - if (!res->ai_addr) error_exit("getaddrinfo failed"); - - freeaddrinfo(res); - free(tmp); -} - -static void resolve_addr(char *host, void *addr, char* port) -{ - struct addrinfo *info, hint; - int ret = atolx(port); - - if(ret <0 || ret > 65535 ) error_exit("bad port: %s", port); - if (strncmp(host, "local:", 6) == 0) { - struct sockaddr *sockun = (struct sockaddr *)addr; - sockun->sa_family = AF_UNIX; - strncpy(((struct sockaddr_un *)sockun)->sun_path, host + 6, - sizeof(((struct sockaddr_un *)sockun)->sun_path)); - return ; - } - memset(&hint, 0, sizeof(hint)); - - ret = getaddrinfo(host, port , &hint, &info); - - if (ret || !info) error_exit("bad address: %s", host); - - memcpy(addr, info->ai_addr, info->ai_addrlen); - freeaddrinfo(info); -} - -void nslookup_main(void) -{ - struct sockaddr* sock; - char *args[2] = {0,0}, *colon = NULL, *name = NULL; - - res_init(); //initialize the _res struct, for DNS name. - - for (;*toys.optargs; toys.optargs++) { - if (**toys.optargs == '-') { - if (!strncmp(&toys.optargs[0][1], "retry=", 6)) { - _res.retry = atolx(toys.optargs[0]+7); - } else if (!strncmp(&toys.optargs[0][1], "timeout=", 8)) { - _res.retrans = atolx(toys.optargs[0]+9); - } else error_msg("invalid option '%s'", *toys.optargs); - } else if (!args[0]) args[0] = *toys.optargs; - else if (!args[1]) args[1] = *toys.optargs; - else error_exit("bad arg '%s'",*toys.optargs); - } - - if ( !*args) { - toys.exithelp++; - error_exit("Needs 1 args minimum"); - } - if (args[1]) { //set the default DNS - struct sockaddr_storage addr; - char* port = NULL ; - - if (args[1][0] == '[') { - int len = strchr(args[1],']') - &args[1][0]; - if (len > 45|| len <= 0 ) error_exit("bad address: %s", args[1]); - strncpy(toybuf,&args[1][1], len-1); - args[1] += len; - } - if ((port = strchr(args[1],':'))) { - *port = '\0'; - port++; - } - else port = "53"; - - resolve_addr((toybuf[0])?toybuf:args[1], &addr, port ); - - if (addr.ss_family == AF_INET) { - _res.nscount = 1; - _res.nsaddr_list[0] = *((struct sockaddr_in*)&addr); - } - else if (addr.ss_family == AF_INET6) { - _res._u._ext.nscount = 1; - _res._u._ext.nsaddrs[0] = ((struct sockaddr_in6*)&addr); - } - } - - sock = (struct sockaddr*)_res._u._ext.nsaddrs[0]; - if (!sock) sock = (struct sockaddr*)&_res.nsaddr_list[0]; - if ((name = address_to_name(sock))) { - colon = strrchr(name, ':'); - if (colon) *colon = '\0'; - print_addrs(name, "Server:"); - free(name); - } - puts(""); - - print_addrs(args[0], "Name:"); -} |