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readability code clean-up (#542)

pull/554/head
Francesco Carli 4 years ago
committed by GitHub
parent
595384a355
commit
e71de330e5
No known key found for this signature in database GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 1201 additions and 1212 deletions
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  1. 2
      include/edge_utils_win32.h
  2. 167
      src/edge.c
  3. 619
      src/edge_utils.c
  4. 6
      src/edge_utils_win32.c
  5. 12
      src/example_edge_embed.c
  6. 3
      src/example_edge_embed_quick_edge_init.c

2
include/edge_utils_win32.h
View File

@ -35,7 +35,7 @@ struct tunread_arg {
int *keep_running; int *keep_running;
}; };
extern HANDLE startTunReadThread(struct tunread_arg *arg); extern HANDLE startTunReadThread (struct tunread_arg *arg);
#endif /* WIN32 */ #endif /* WIN32 */

167
src/edge.c
View File

@ -57,7 +57,7 @@ int num_cap = sizeof(cap_values)/sizeof(cap_value_t);
* *
* return 0 on success and -1 on error * return 0 on success and -1 on error
*/ */
static int scan_address(char * ip_addr, size_t addr_size, static int scan_address (char * ip_addr, size_t addr_size,
char * netmask, size_t netmask_size, char * netmask, size_t netmask_size,
char * ip_mode, size_t mode_size, char * ip_mode, size_t mode_size,
char * s) { char * s) {
@ -210,25 +210,22 @@ static void help() {
/* *************************************************** */ /* *************************************************** */
static void setPayloadCompression(n2n_edge_conf_t *conf, int compression) { static void setPayloadCompression (n2n_edge_conf_t *conf, int compression) {
/* even though 'compression' and 'conf->compression' share the same encoding scheme, /* even though 'compression' and 'conf->compression' share the same encoding scheme,
* a switch-statement under conditional compilation is used to sort out the * a switch-statement under conditional compilation is used to sort out the
* unsupported optarguments */ * unsupported optarguments */
switch (compression) { switch (compression) {
case 1: case 1: {
{
conf->compression = N2N_COMPRESSION_ID_LZO; conf->compression = N2N_COMPRESSION_ID_LZO;
break; break;
} }
#ifdef N2N_HAVE_ZSTD #ifdef N2N_HAVE_ZSTD
case 2: case 2: {
{
conf->compression = N2N_COMPRESSION_ID_ZSTD; conf->compression = N2N_COMPRESSION_ID_ZSTD;
break; break;
} }
#endif #endif
default: default: {
{
conf->compression = N2N_COMPRESSION_ID_NONE; conf->compression = N2N_COMPRESSION_ID_NONE;
// internal comrpession scheme numbering differs from cli counting by one, hence plus one // internal comrpession scheme numbering differs from cli counting by one, hence plus one
// (internal: 0 == invalid, 1 == none, 2 == lzo, 3 == zstd) // (internal: 0 == invalid, 1 == none, 2 == lzo, 3 == zstd)
@ -240,38 +237,37 @@ static void setPayloadCompression(n2n_edge_conf_t *conf, int compression) {
/* *************************************************** */ /* *************************************************** */
static void setPayloadEncryption( n2n_edge_conf_t *conf, int cipher) { static void setPayloadEncryption (n2n_edge_conf_t *conf, int cipher) {
/* even though 'cipher' and 'conf->transop_id' share the same encoding scheme, /* even though 'cipher' and 'conf->transop_id' share the same encoding scheme,
* a switch-statement under conditional compilation is used to sort out the * a switch-statement under conditional compilation is used to sort out the
* unsupported ciphers */ * unsupported ciphers */
switch (cipher) { switch (cipher) {
case 1: case 1: {
{
conf->transop_id = N2N_TRANSFORM_ID_NULL; conf->transop_id = N2N_TRANSFORM_ID_NULL;
break; break;
} }
case 2:
{ case 2: {
conf->transop_id = N2N_TRANSFORM_ID_TWOFISH; conf->transop_id = N2N_TRANSFORM_ID_TWOFISH;
break; break;
} }
case 3:
{ case 3: {
conf->transop_id = N2N_TRANSFORM_ID_AES; conf->transop_id = N2N_TRANSFORM_ID_AES;
break; break;
} }
case 4:
{ case 4: {
conf->transop_id = N2N_TRANSFORM_ID_CHACHA20; conf->transop_id = N2N_TRANSFORM_ID_CHACHA20;
break; break;
} }
case 5:
{ case 5: {
conf->transop_id = N2N_TRANSFORM_ID_SPECK; conf->transop_id = N2N_TRANSFORM_ID_SPECK;
break; break;
} }
default:
{ default: {
conf->transop_id = N2N_TRANSFORM_ID_INVAL; conf->transop_id = N2N_TRANSFORM_ID_INVAL;
traceEvent(TRACE_NORMAL, "the %s cipher given by -A_ option is not supported in this version.", transop_str(cipher)); traceEvent(TRACE_NORMAL, "the %s cipher given by -A_ option is not supported in this version.", transop_str(cipher));
exit(1); exit(1);
@ -281,12 +277,11 @@ static void setPayloadEncryption( n2n_edge_conf_t *conf, int cipher) {
/* *************************************************** */ /* *************************************************** */
static int setOption(int optkey, char *optargument, n2n_tuntap_priv_config_t *ec, n2n_edge_conf_t *conf) { static int setOption (int optkey, char *optargument, n2n_tuntap_priv_config_t *ec, n2n_edge_conf_t *conf) {
/* traceEvent(TRACE_NORMAL, "Option %c = %s", optkey, optargument ? optargument : ""); */ /* traceEvent(TRACE_NORMAL, "Option %c = %s", optkey, optargument ? optargument : ""); */
switch(optkey) { switch(optkey) {
case 'a': /* IP address and mode of TUNTAP interface */ case 'a': /* IP address and mode of TUNTAP interface */ {
{
scan_address(ec->ip_addr, N2N_NETMASK_STR_SIZE, scan_address(ec->ip_addr, N2N_NETMASK_STR_SIZE,
ec->netmask, N2N_NETMASK_STR_SIZE, ec->netmask, N2N_NETMASK_STR_SIZE,
ec->ip_mode, N2N_IF_MODE_SIZE, ec->ip_mode, N2N_IF_MODE_SIZE,
@ -294,83 +289,72 @@ static int setOption(int optkey, char *optargument, n2n_tuntap_priv_config_t *ec
break; break;
} }
case 'c': /* community as a string */ case 'c': /* community as a string */ {
{
memset(conf->community_name, 0, N2N_COMMUNITY_SIZE); memset(conf->community_name, 0, N2N_COMMUNITY_SIZE);
strncpy((char *)conf->community_name, optargument, N2N_COMMUNITY_SIZE); strncpy((char *)conf->community_name, optargument, N2N_COMMUNITY_SIZE);
conf->community_name[N2N_COMMUNITY_SIZE-1] = '\0'; conf->community_name[N2N_COMMUNITY_SIZE - 1] = '\0';
break; break;
} }
case 'E': /* multicast ethernet addresses accepted. */ case 'E': /* multicast ethernet addresses accepted. */ {
{ conf->drop_multicast = 0;
conf->drop_multicast=0;
traceEvent(TRACE_DEBUG, "Enabling ethernet multicast traffic"); traceEvent(TRACE_DEBUG, "Enabling ethernet multicast traffic");
break; break;
} }
#ifndef WIN32 #ifndef WIN32
case 'u': /* unprivileged uid */ case 'u': /* unprivileged uid */ {
{
ec->userid = atoi(optargument); ec->userid = atoi(optargument);
break; break;
} }
case 'g': /* unprivileged uid */ case 'g': /* unprivileged uid */ {
{
ec->groupid = atoi(optargument); ec->groupid = atoi(optargument);
break; break;
} }
#endif #endif
#ifndef WIN32 #ifndef WIN32
case 'f' : /* do not fork as daemon */ case 'f' : /* do not fork as daemon */ {
{ ec->daemon = 0;
ec->daemon=0;
break; break;
} }
#endif /* #ifndef WIN32 */ #endif /* #ifndef WIN32 */
case 'm' : /* TUNTAP MAC address */ case 'm' : /* TUNTAP MAC address */ {
{ strncpy(ec->device_mac, optargument, N2N_MACNAMSIZ);
strncpy(ec->device_mac,optargument,N2N_MACNAMSIZ); ec->device_mac[N2N_MACNAMSIZ - 1] = '\0';
ec->device_mac[N2N_MACNAMSIZ-1] = '\0';
break; break;
} }
case 'M' : /* TUNTAP MTU */ case 'M' : /* TUNTAP MTU */ {
{
ec->mtu = atoi(optargument); ec->mtu = atoi(optargument);
break; break;
} }
#ifndef __APPLE__ #ifndef __APPLE__
case 'D' : /* enable PMTU discovery */ case 'D' : /* enable PMTU discovery */ {
{
conf->disable_pmtu_discovery = 0; conf->disable_pmtu_discovery = 0;
break; break;
} }
#endif #endif
case 'k': /* encrypt key */ case 'k': /* encrypt key */ {
{
if(conf->encrypt_key) free(conf->encrypt_key); if(conf->encrypt_key) free(conf->encrypt_key);
conf->encrypt_key = strdup(optargument); conf->encrypt_key = strdup(optargument);
traceEvent(TRACE_DEBUG, "encrypt_key = '%s'\n", conf->encrypt_key); traceEvent(TRACE_DEBUG, "encrypt_key = '%s'\n", conf->encrypt_key);
break; break;
} }
case 'r': /* enable packet routing across n2n endpoints */ case 'r': /* enable packet routing across n2n endpoints */ {
{
conf->allow_routing = 1; conf->allow_routing = 1;
break; break;
} }
case 'A': case 'A': {
{
int cipher; int cipher;
if (optargument) { if(optargument) {
cipher = atoi(optargument); cipher = atoi(optargument);
} else { } else {
traceEvent(TRACE_NORMAL, "the use of the solitary -A switch is deprecated and might not be supported in future versions. " traceEvent(TRACE_NORMAL, "the use of the solitary -A switch is deprecated and might not be supported in future versions. "
@ -383,19 +367,17 @@ static int setOption(int optkey, char *optargument, n2n_tuntap_priv_config_t *ec
break; break;
} }
case 'H': /* indicate header encryption */ case 'H': /* indicate header encryption */ {
{
/* we cannot be sure if this gets parsed before the community name is set. /* we cannot be sure if this gets parsed before the community name is set.
* so, only an indicator is set, action is taken later*/ * so, only an indicator is set, action is taken later*/
conf->header_encryption = HEADER_ENCRYPTION_ENABLED; conf->header_encryption = HEADER_ENCRYPTION_ENABLED;
break; break;
} }
case 'z': case 'z': {
{
int compression; int compression;
if (optargument) { if(optargument) {
compression = atoi(optargument); compression = atoi(optargument);
} else } else
compression = 1; // default, if '-z' only, equals -z1 compression = 1; // default, if '-z' only, equals -z1
@ -422,27 +404,24 @@ static int setOption(int optkey, char *optargument, n2n_tuntap_priv_config_t *ec
break; break;
#if defined(N2N_CAN_NAME_IFACE) #if defined(N2N_CAN_NAME_IFACE)
case 'd': /* TUNTAP name */ case 'd': /* TUNTAP name */ {
{
strncpy(ec->tuntap_dev_name, optargument, N2N_IFNAMSIZ); strncpy(ec->tuntap_dev_name, optargument, N2N_IFNAMSIZ);
ec->tuntap_dev_name[N2N_IFNAMSIZ-1] = '\0'; ec->tuntap_dev_name[N2N_IFNAMSIZ - 1] = '\0';
break; break;
} }
#endif #endif
case 'I': /* Device Description (hint) */ case 'I': /* Device Description (hint) */ {
{
memset(conf->dev_desc, 0, N2N_DESC_SIZE); memset(conf->dev_desc, 0, N2N_DESC_SIZE);
/* reserve possible last char as null terminator. */ /* reserve possible last char as null terminator. */
strncpy((char *)conf->dev_desc, optargument, N2N_DESC_SIZE-1); strncpy((char *)conf->dev_desc, optargument, N2N_DESC_SIZE-1);
break; break;
} }
case 'p': case 'p': {
{
conf->local_port = atoi(optargument); conf->local_port = atoi(optargument);
if(conf->local_port == 0){ if(conf->local_port == 0) {
traceEvent(TRACE_WARNING, "Bad local port format"); traceEvent(TRACE_WARNING, "Bad local port format");
break; break;
} }
@ -450,15 +429,13 @@ static int setOption(int optkey, char *optargument, n2n_tuntap_priv_config_t *ec
break; break;
} }
case 't': case 't': {
{
conf->mgmt_port = atoi(optargument); conf->mgmt_port = atoi(optargument);
break; break;
} }
#ifdef __linux__ #ifdef __linux__
case 'T': case 'T': {
{
if((optargument[0] == '0') && (optargument[1] == 'x')) if((optargument[0] == '0') && (optargument[1] == 'x'))
conf->tos = strtol(&optargument[2], NULL, 16); conf->tos = strtol(&optargument[2], NULL, 16);
else else
@ -468,8 +445,7 @@ static int setOption(int optkey, char *optargument, n2n_tuntap_priv_config_t *ec
} }
#endif #endif
case 'n': case 'n': {
{
char cidr_net[64], gateway[64]; char cidr_net[64], gateway[64];
n2n_route_t route; n2n_route_t route;
@ -505,14 +481,12 @@ static int setOption(int optkey, char *optargument, n2n_tuntap_priv_config_t *ec
break; break;
} }
case 'S': case 'S': {
{
conf->allow_p2p = 0; conf->allow_p2p = 0;
break; break;
} }
case 'h': /* help */ case 'h': /* help */ {
{
help(); help();
break; break;
} }
@ -521,22 +495,21 @@ static int setOption(int optkey, char *optargument, n2n_tuntap_priv_config_t *ec
setTraceLevel(getTraceLevel() + 1); setTraceLevel(getTraceLevel() + 1);
break; break;
case 'R': /* network traffic filter */ case 'R': /* network traffic filter */ {
{
filter_rule_t *new_rule = malloc(sizeof(filter_rule_t)); filter_rule_t *new_rule = malloc(sizeof(filter_rule_t));
memset(new_rule, 0, sizeof(filter_rule_t)); memset(new_rule, 0, sizeof(filter_rule_t));
if(process_traffic_filter_rule_str(optargument, new_rule) )
{ if(process_traffic_filter_rule_str(optargument, new_rule)) {
HASH_ADD(hh, conf->network_traffic_filter_rules, key, sizeof(filter_rule_key_t), new_rule); HASH_ADD(hh, conf->network_traffic_filter_rules, key, sizeof(filter_rule_key_t), new_rule);
}else{ } else {
free(new_rule); free(new_rule);
traceEvent(TRACE_WARNING, "Invalid filter rule: %s", optargument); traceEvent(TRACE_WARNING, "Invalid filter rule: %s", optargument);
return(-1); return(-1);
} }
break; break;
} }
default:
{ default: {
traceEvent(TRACE_WARNING, "Unknown option -%c: Ignored", (char)optkey); traceEvent(TRACE_WARNING, "Unknown option -%c: Ignored", (char)optkey);
return(-1); return(-1);
} }
@ -562,7 +535,7 @@ static const struct option long_options[] =
/* *************************************************** */ /* *************************************************** */
/* read command line options */ /* read command line options */
static int loadFromCLI(int argc, char *argv[], n2n_edge_conf_t *conf, n2n_tuntap_priv_config_t *ec) { static int loadFromCLI (int argc, char *argv[], n2n_edge_conf_t *conf, n2n_tuntap_priv_config_t *ec) {
u_char c; u_char c;
while ((c = getopt_long(argc, argv, while ((c = getopt_long(argc, argv,
@ -581,7 +554,7 @@ static int loadFromCLI(int argc, char *argv[], n2n_edge_conf_t *conf, n2n_tuntap
/* *************************************************** */ /* *************************************************** */
static char *trim(char *s) { static char *trim (char *s) {
char *end; char *end;
while(isspace(s[0]) || (s[0] == '"') || (s[0] == '\'')) s++; while(isspace(s[0]) || (s[0] == '"') || (s[0] == '\'')) s++;
@ -599,7 +572,7 @@ static char *trim(char *s) {
/* *************************************************** */ /* *************************************************** */
/* parse the configuration file */ /* parse the configuration file */
static int loadFromFile(const char *path, n2n_edge_conf_t *conf, n2n_tuntap_priv_config_t *ec) { static int loadFromFile (const char *path, n2n_edge_conf_t *conf, n2n_tuntap_priv_config_t *ec) {
char buffer[4096], *line, *key, *value; char buffer[4096], *line, *key, *value;
u_int line_len, opt_name_len; u_int line_len, opt_name_len;
FILE *fd; FILE *fd;
@ -660,11 +633,11 @@ static int loadFromFile(const char *path, n2n_edge_conf_t *conf, n2n_tuntap_priv
/* Adding an exception for -A_ -z_ which can come /* Adding an exception for -A_ -z_ which can come
without '=' and even without any further data */ without '=' and even without any further data */
if (key[0] == 'z') { if(key[0] == 'z') {
if (key[1]) value = &key[1]; if(key[1]) value = &key[1];
key = "z"; key = "z";
} else if (key[0] == 'A') { } else if(key[0] == 'A') {
if (key[1]) value = &key[1]; if(key[1]) value = &key[1];
key = "A"; key = "A";
} }
} }
@ -683,7 +656,7 @@ static int loadFromFile(const char *path, n2n_edge_conf_t *conf, n2n_tuntap_priv
/* ************************************** */ /* ************************************** */
static void daemonize() { static void daemonize () {
#ifndef WIN32 #ifndef WIN32
int childpid; int childpid;
@ -759,7 +732,7 @@ BOOL WINAPI term_handler(DWORD sig)
/* *************************************************** */ /* *************************************************** */
/** Entry point to program from kernel. */ /** Entry point to program from kernel. */
int main(int argc, char* argv[]) { int main (int argc, char* argv[]) {
int rc; int rc;
tuntap_dev tuntap; /* a tuntap device */ tuntap_dev tuntap; /* a tuntap device */
n2n_edge_t *eee; /* single instance for this program */ n2n_edge_t *eee; /* single instance for this program */
@ -852,11 +825,11 @@ int main(int argc, char* argv[]) {
} }
memcpy(&(eee->tuntap_priv_conf), &ec, sizeof(ec)); memcpy(&(eee->tuntap_priv_conf), &ec, sizeof(ec));
if ((0 == strcmp("static", eee->tuntap_priv_conf.ip_mode)) || if((0 == strcmp("static", eee->tuntap_priv_conf.ip_mode)) ||
((eee->tuntap_priv_conf.ip_mode[0] == '\0') && (eee->tuntap_priv_conf.ip_addr[0] != '\0'))) { ((eee->tuntap_priv_conf.ip_mode[0] == '\0') && (eee->tuntap_priv_conf.ip_addr[0] != '\0'))) {
traceEvent(TRACE_NORMAL, "Use manually set IP address."); traceEvent(TRACE_NORMAL, "Use manually set IP address.");
eee->conf.tuntap_ip_mode = TUNTAP_IP_MODE_STATIC; eee->conf.tuntap_ip_mode = TUNTAP_IP_MODE_STATIC;
} else if (0 == strcmp("dhcp", eee->tuntap_priv_conf.ip_mode)) { } else if(0 == strcmp("dhcp", eee->tuntap_priv_conf.ip_mode)) {
traceEvent(TRACE_NORMAL, "Obtain IP from other edge DHCP services."); traceEvent(TRACE_NORMAL, "Obtain IP from other edge DHCP services.");
eee->conf.tuntap_ip_mode = TUNTAP_IP_MODE_DHCP; eee->conf.tuntap_ip_mode = TUNTAP_IP_MODE_DHCP;
} else { } else {
@ -872,16 +845,16 @@ int main(int argc, char* argv[]) {
wait_time.tv_sec = SOCKET_TIMEOUT_INTERVAL_SECS; wait_time.tv_sec = SOCKET_TIMEOUT_INTERVAL_SECS;
wait_time.tv_usec = 0; wait_time.tv_usec = 0;
if (select(eee->udp_sock + 1, &socket_mask, NULL, NULL, &wait_time) > 0) { if(select(eee->udp_sock + 1, &socket_mask, NULL, NULL, &wait_time) > 0) {
if (FD_ISSET(eee->udp_sock, &socket_mask)) { if(FD_ISSET(eee->udp_sock, &socket_mask)) {
readFromIPSocket(eee, eee->udp_sock); readFromIPSocket(eee, eee->udp_sock);
} }
} }
} while (eee->sn_wait); } while(eee->sn_wait);
eee->last_register_req = 0; eee->last_register_req = 0;
} }
if (tuntap_open(&tuntap, eee->tuntap_priv_conf.tuntap_dev_name, eee->tuntap_priv_conf.ip_mode, if(tuntap_open(&tuntap, eee->tuntap_priv_conf.tuntap_dev_name, eee->tuntap_priv_conf.ip_mode,
eee->tuntap_priv_conf.ip_addr, eee->tuntap_priv_conf.netmask, eee->tuntap_priv_conf.ip_addr, eee->tuntap_priv_conf.netmask,
eee->tuntap_priv_conf.device_mac, eee->tuntap_priv_conf.mtu) < 0) exit(1); eee->tuntap_priv_conf.device_mac, eee->tuntap_priv_conf.mtu) < 0) exit(1);
traceEvent(TRACE_NORMAL, "Local tap IP: %s, Mask: %s", traceEvent(TRACE_NORMAL, "Local tap IP: %s, Mask: %s",

619
src/edge_utils.c
View File

File diff suppressed because it is too large

6
src/edge_utils_win32.c
View File

@ -22,7 +22,8 @@
/* ************************************** */ /* ************************************** */
static DWORD* tunReadThread(LPVOID lpArg) { static DWORD* tunReadThread (LPVOID lpArg) {
struct tunread_arg *arg = (struct tunread_arg*)lpArg; struct tunread_arg *arg = (struct tunread_arg*)lpArg;
while(*arg->keep_running) while(*arg->keep_running)
@ -35,7 +36,8 @@ static DWORD* tunReadThread(LPVOID lpArg) {
/** Start a second thread in Windows because TUNTAP interfaces do not expose /** Start a second thread in Windows because TUNTAP interfaces do not expose
* file descriptors. */ * file descriptors. */
HANDLE startTunReadThread(struct tunread_arg *arg) { HANDLE startTunReadThread (struct tunread_arg *arg) {
DWORD dwThreadId; DWORD dwThreadId;
return(CreateThread(NULL, /* security attributes */ return(CreateThread(NULL, /* security attributes */

12
src/example_edge_embed.c
View File

@ -20,8 +20,8 @@
static int keep_running; static int keep_running;
int main() int main() {
{
n2n_edge_conf_t conf; n2n_edge_conf_t conf;
tuntap_dev tuntap; tuntap_dev tuntap;
n2n_edge_t *eee; n2n_edge_t *eee;
@ -43,12 +43,11 @@ int main()
conf.tos = 16; // Type of service for sent packets conf.tos = 16; // Type of service for sent packets
conf.transop_id = N2N_TRANSFORM_ID_TWOFISH; // Use the twofish encryption conf.transop_id = N2N_TRANSFORM_ID_TWOFISH; // Use the twofish encryption
if (edge_verify_conf(&conf) != 0) if(edge_verify_conf(&conf) != 0) {
{
return -1; return -1;
} }
if (tuntap_open(&tuntap, if(tuntap_open(&tuntap,
"edge0", // Name of the device to create "edge0", // Name of the device to create
"static", // IP mode; static|dhcp "static", // IP mode; static|dhcp
"10.0.0.1", // Set ip address "10.0.0.1", // Set ip address
@ -60,8 +59,7 @@ int main()
} }
eee = edge_init(&conf, &rc); eee = edge_init(&conf, &rc);
if (eee == NULL) if(eee == NULL) {
{
exit(1); exit(1);
} }

3
src/example_edge_embed_quick_edge_init.c
View File

@ -23,7 +23,8 @@
n2n on an existing application n2n on an existing application
*/ */
int main(int argc, char* argv[]) { int main (int argc, char* argv[]) {
char *device_name = (char*)"n2n0"; char *device_name = (char*)"n2n0";
char *network_name = (char*)"mynetwork"; char *network_name = (char*)"mynetwork";
char *secret_key = (char*)"mysecret"; char *secret_key = (char*)"mysecret";

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