/*
netutl.c -- some supporting network utility code
- Copyright (C) 1998,1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>
+ Copyright (C) 2014-2017 Guus Sliepen <guus@meshlink.io>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- 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.
+ 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.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "system.h"
+
+#include "net.h"
+#include "netutl.h"
+#include "logger.h"
+#include "utils.h"
+#include "xalloc.h"
- $Id: netutl.c,v 1.12.4.16 2000/11/22 18:54:08 guus Exp $
+/*
+ Turn a string into a struct addrinfo.
+ Return NULL on failure.
*/
+struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) {
+ struct addrinfo *ai;
+ int err;
-#include "config.h"
+ struct addrinfo hint = {
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = socktype,
+ };
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <syslog.h>
+ err = getaddrinfo(address, service, &hint, &ai);
-#include <utils.h>
-#include <xalloc.h>
+ if(err) {
+ logger(NULL, MESHLINK_WARNING, "Error looking up %s port %s: %s", address, service, err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
+ return NULL;
+ }
-#include "errno.h"
-#include "conf.h"
-#include "net.h"
-#include "netutl.h"
+ return ai;
+}
-#include "system.h"
+sockaddr_t str2sockaddr(const char *address, const char *port) {
+ struct addrinfo *ai;
+ sockaddr_t result;
+ int err;
+ memset(&result, 0, sizeof(result));
-/*
- free a queue and all of its elements
-*/
-void destroy_queue(packet_queue_t *pq)
-{
- queue_element_t *p, *q;
-cp
- for(p = pq->head; p != NULL; p = q)
- {
- q = p->next;
- if(p->packet)
- free(p->packet);
- free(p);
- }
-
- free(pq);
-cp
+ struct addrinfo hint = {
+ .ai_family = AF_UNSPEC,
+ .ai_flags = AI_NUMERICHOST,
+ .ai_socktype = SOCK_STREAM,
+ };
+
+ err = getaddrinfo(address, port, &hint, &ai);
+
+ if(err || !ai) {
+ logger(NULL, MESHLINK_DEBUG, "Unknown type address %s port %s", address, port);
+ result.sa.sa_family = AF_UNKNOWN;
+ result.unknown.address = xstrdup(address);
+ result.unknown.port = xstrdup(port);
+ return result;
+ }
+
+ memcpy(&result, ai->ai_addr, ai->ai_addrlen);
+ freeaddrinfo(ai);
+
+ return result;
}
+void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
+ char address[NI_MAXHOST];
+ char port[NI_MAXSERV];
+ char *scopeid;
+ int err;
+
+ if(sa->sa.sa_family == AF_UNKNOWN) {
+ if(addrstr) {
+ *addrstr = xstrdup(sa->unknown.address);
+ }
+
+ if(portstr) {
+ *portstr = xstrdup(sa->unknown.port);
+ }
+
+ return;
+ }
-char *hostlookup(unsigned long addr)
-{
- char *name;
- struct hostent *host = NULL;
- struct in_addr in;
- config_t const *cfg;
- int lookup_hostname;
-cp
- in.s_addr = addr;
-
- lookup_hostname = 0;
- if((cfg = get_config_val(config, config_hostnames)) != NULL)
- if(cfg->data.val == stupid_true)
- lookup_hostname = 1;
-
- if(lookup_hostname)
- host = gethostbyaddr((char *)&in, sizeof(in), AF_INET);
-
- if(!lookup_hostname || !host)
- {
- asprintf(&name, "%s", inet_ntoa(in));
- }
- else
- {
- asprintf(&name, "%s", host->h_name);
- }
-cp
- return name;
+ err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
+
+ if(err) {
+ logger(NULL, MESHLINK_ERROR, "Error while translating addresses: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
+ abort();
+ }
+
+ scopeid = strchr(address, '%');
+
+ if(scopeid) {
+ *scopeid = '\0'; /* Descope. */
+ }
+
+ if(addrstr) {
+ *addrstr = xstrdup(address);
+ }
+
+ if(portstr) {
+ *portstr = xstrdup(port);
+ }
}
-/*
- Turn a string into an IP addy with netmask
- return NULL on failure
-*/
-ip_mask_t *strtoip(char *str)
-{
- ip_mask_t *ip;
- int masker;
- char *q, *p;
- struct hostent *h;
-cp
- p = str;
- if((q = strchr(p, '/')))
- {
- *q = '\0';
- q++; /* q now points to netmask part, or NULL if no mask */
- }
-
- if(!(h = gethostbyname(p)))
- {
- if(debug_lvl >= DEBUG_ERROR)
- syslog(LOG_WARNING, _("Error looking up `%s': %s\n"), p, strerror(errno));
-
- return NULL;
- }
-
- masker = 0;
- if(q)
- {
- masker = strtol(q, &p, 10);
- if(q == p || (*p))
- return NULL;
- }
-
- ip = xmalloc(sizeof(*ip));
- ip->address = ntohl(*((ip_t*)(h->h_addr_list[0])));
-
- ip->mask = masker ? ~((1 << (32 - masker)) - 1) : 0;
-cp
- return ip;
+char *sockaddr2hostname(const sockaddr_t *sa) {
+ char *str;
+ char address[NI_MAXHOST] = "unknown";
+ char port[NI_MAXSERV] = "unknown";
+ int err;
+
+ if(sa->sa.sa_family == AF_UNKNOWN) {
+ xasprintf(&str, "%s port %s", sa->unknown.address, sa->unknown.port);
+ return str;
+ }
+
+ err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
+
+ if(err) {
+ logger(NULL, MESHLINK_ERROR, "Error while looking up hostname: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
+ abort();
+ }
+
+ xasprintf(&str, "%s port %s", address, port);
+
+ return str;
}
+int sockaddrcmp_noport(const sockaddr_t *a, const sockaddr_t *b) {
+ int result;
+
+ result = a->sa.sa_family - b->sa.sa_family;
+
+ if(result) {
+ return result;
+ }
+
+ switch(a->sa.sa_family) {
+ case AF_UNSPEC:
+ return 0;
+
+ case AF_UNKNOWN:
+ return strcmp(a->unknown.address, b->unknown.address);
+
+ case AF_INET:
+ return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
+
+ case AF_INET6:
+ return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
+
+ default:
+ logger(NULL, MESHLINK_ERROR, "sockaddrcmp() was called with unknown address family %d, exitting!",
+ a->sa.sa_family);
+ abort();
+ }
+}
+
+int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b) {
+ int result;
+
+ result = a->sa.sa_family - b->sa.sa_family;
+
+ if(result) {
+ return result;
+ }
+
+ switch(a->sa.sa_family) {
+ case AF_UNSPEC:
+ return 0;
+
+ case AF_UNKNOWN:
+ result = strcmp(a->unknown.address, b->unknown.address);
+
+ if(result) {
+ return result;
+ }
+
+ return strcmp(a->unknown.port, b->unknown.port);
+
+ case AF_INET:
+ result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a)->in.sin_addr);
+
+ if(result) {
+ return result;
+ }
+
+ return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a)->in.sin_port);
+
+ case AF_INET6:
+ result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a)->in6.sin6_addr);
+
+ if(result) {
+ return result;
+ }
+
+ return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a)->in6.sin6_port);
+
+ default:
+ logger(NULL, MESHLINK_ERROR, "sockaddrcmp() was called with unknown address family %d, exitting!",
+ a->sa.sa_family);
+ abort();
+ }
+}
+
+void sockaddrcpy(sockaddr_t *a, const sockaddr_t *b) {
+ if(b->sa.sa_family != AF_UNKNOWN) {
+ *a = *b;
+ } else {
+ a->unknown.family = AF_UNKNOWN;
+ a->unknown.address = xstrdup(b->unknown.address);
+ a->unknown.port = xstrdup(b->unknown.port);
+ }
+}
+
+void sockaddrcpy_setport(sockaddr_t *a, const sockaddr_t *b, uint16_t port) {
+ sockaddrcpy(a, b);
+
+ switch(b->sa.sa_family) {
+ case AF_INET:
+ a->in.sin_port = htons(port);
+ break;
+
+ case AF_INET6:
+ a->in6.sin6_port = htons(port);
+ break;
+
+ default:
+ break;
+ }
+}
+
+void sockaddrfree(sockaddr_t *a) {
+ if(a->sa.sa_family == AF_UNKNOWN) {
+ free(a->unknown.address);
+ free(a->unknown.port);
+ }
+}
+
+void sockaddrunmap(sockaddr_t *sa) {
+ if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
+ sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
+ sa->in.sin_family = AF_INET;
+ }
+}
+
+void packmsg_add_sockaddr(packmsg_output_t *out, const sockaddr_t *sa) {
+ switch(sa->sa.sa_family) {
+ case AF_INET: {
+ uint8_t buf[6];
+ memcpy(buf + 0, &sa->in.sin_port, 2);
+ memcpy(buf + 2, &sa->in.sin_addr, 4);
+ packmsg_add_ext(out, 4, buf, sizeof(buf));
+ break;
+ }
+
+ case AF_INET6: {
+ uint8_t buf[18];
+ memcpy(buf + 0, &sa->in6.sin6_port, 2);
+ memcpy(buf + 2, &sa->in6.sin6_addr, 16);
+ packmsg_add_ext(out, 6, buf, sizeof(buf));
+ break;
+ }
+
+ default:
+ packmsg_output_invalidate(out);
+ break;
+ }
+}
+
+sockaddr_t packmsg_get_sockaddr(packmsg_input_t *in) {
+ sockaddr_t sa = {0};
+
+ int8_t type;
+ const void *data;
+ uint32_t len = packmsg_get_ext_raw(in, &type, &data);
+
+ switch(type) {
+ case 4:
+ if(len != 6) {
+ packmsg_input_invalidate(in);
+ return sa;
+ }
+
+ sa.sa.sa_family = AF_INET;
+ memcpy(&sa.in.sin_port, (uint8_t *)data + 0, 2);
+ memcpy(&sa.in.sin_addr, (uint8_t *)data + 2, 4);
+ break;
+
+ case 6:
+ if(len != 18) {
+ packmsg_input_invalidate(in);
+ return sa;
+ }
+
+ sa.sa.sa_family = AF_INET6;
+ memcpy(&sa.in6.sin6_port, (uint8_t *)data + 0, 2);
+ memcpy(&sa.in6.sin6_addr, (uint8_t *)data + 2, 16);
+ break;
+
+ default:
+ packmsg_input_invalidate(in);
+ return sa;
+ }
+
+ return sa;
+}
projects / meshlink / blobdiff