X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fnetutl.c;h=6654f977a783a1349282e7ce862afb3eac404a6b;hb=28be4baae016a5a771d0d9ec6e97ef38a4fc9e46;hp=73719232bb4cce6c05b605c837e3d00e9f0323bb;hpb=f6e87ab476a0faf8b124ecaaa27f967d825e6457;p=tinc

diff --git a/src/netutl.c b/src/netutl.c
index 73719232..6654f977 100644
--- a/src/netutl.c
+++ b/src/netutl.c
@@ -23,11 +23,34 @@
 #include "net.h"
 #include "netutl.h"
 #include "logger.h"
-#include "utils.h"
 #include "xalloc.h"
 
 bool hostnames = false;
 
+uint16_t service_to_port(const char *service) {
+	struct addrinfo *ai = str2addrinfo("localhost", service, SOCK_STREAM);
+
+	if(!ai || !ai->ai_addr) {
+		return 0;
+	}
+
+	sockaddr_t sa;
+	memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
+	freeaddrinfo(ai);
+
+	switch(sa.sa.sa_family) {
+	case AF_INET:
+		return ntohs(sa.in.sin_port);
+
+	case AF_INET6:
+		return ntohs(sa.in6.sin6_port);
+
+	default:
+		logger(DEBUG_ALWAYS, LOG_WARNING, "Unknown address family %d for service %s.", sa.sa.sa_family, service);
+		return 0;
+	}
+}
+
 /*
   Turn a string into a struct addrinfo.
   Return NULL on failure.
@@ -54,7 +77,7 @@ struct addrinfo *str2addrinfo(const char *address, const char *service, int sock
 
 sockaddr_t str2sockaddr(const char *address, const char *port) {
 	struct addrinfo *ai, hint = {0};
-	sockaddr_t result = {{0}};
+	sockaddr_t result = {0};
 	int err;
 
 	hint.ai_family = AF_UNSPEC;
@@ -105,7 +128,7 @@ void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
 		return;
 	}
 
-	err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof port, NI_NUMERICHOST | NI_NUMERICSERV);
+	err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
 
 	if(err) {
 		logger(DEBUG_ALWAYS, LOG_ERR, "Error while translating addresses: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
@@ -141,7 +164,7 @@ char *sockaddr2hostname(const sockaddr_t *sa) {
 		return str;
 	}
 
-	err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof port,
+	err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port),
 	                  hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
 
 	if(err) {
@@ -277,3 +300,37 @@ void sockaddr_setport(sockaddr_t *sa, const char *port) {
 		return;
 	}
 }
+
+bool is_local_connection(const sockaddr_t *sa) {
+	switch(sa->sa.sa_family) {
+	case AF_INET:
+		// 127.0.0.0/8
+		return ntohl(sa->in.sin_addr.s_addr) >> 24 == 127;
+
+	case AF_INET6:
+		return IN6_IS_ADDR_LOOPBACK(&sa->in6.sin6_addr);
+
+	case AF_UNIX:
+		return true;
+
+	default:
+		return false;
+	}
+}
+
+uint16_t get_bound_port(int sockfd) {
+	sockaddr_t sa;
+	socklen_t salen = sizeof(sa);
+
+	if(getsockname(sockfd, (struct sockaddr *) &sa, &salen)) {
+		return 0;
+	}
+
+	if(sa.sa.sa_family == AF_INET) {
+		return ntohs(sa.in.sin_port);
+	} else  if(sa.sa.sa_family == AF_INET6) {
+		return ntohs(sa.in6.sin6_port);
+	} else {
+		return 0;
+	}
+}