Mnemonic: tools_static.c
Abstract: A small set of very simple tools to support Uta == RMR.
uta_tokenise -- simple string tokeniser
+ uta_rmip_tokenise -- tokenise and remove ip addresses from the list
uta_h2ip -- look up host name and return an ip address
uta_lookup_rtg -- looks in env for rtg host:port
uta_has_str -- searches buffer of tokens for a string
uta_link2 -- establish a nanomsg connection to a host
+ uta_dump_env -- dump the environment variables to stdout that are
+ of importance to RMR.
+
Author: E. Scott Daniels
Date: 30 November 2018
*/
#include <sys/socket.h>
#include <netdb.h>
+// --- some protos needed for better organisation --------
+int is_this_myip( if_addrs_t* l, char* addr );
+
+
+// ----------------------------------------------------------------------------------
/*
Simple tokeniser. Split a null terminated string into tokens recording the
return n;
}
+/*
+ Tokenise and remove matches.
+ Given a buffer of 'sep' separated tokens, and a list of things,
+ return up to max tokens with any tokens that matched things in
+ the list. Toks is the user supplied array of char* which we will
+ fill in (up to max) with pointers to tokens from buf. This
+ damages buf, so the caller must dup the string if it must be
+ preserved for later, original, use. The pointers returned in
+ toks will reference portions of bufs.
+
+ Returns the number of tokens referenced by toks.
+*/
+static int uta_rmip_tokenise( char* buf, if_addrs_t* iplist, char** toks, int max, char sep ) {
+ int ntoks = 0; // total toks in the original buffer
+ int pcount = 0; // count after prune
+ char** all_toks;
+ int i;
+ int j;
+
+
+ all_toks = malloc( sizeof( char * ) * max ); // refernce to all tokens; we'll prune
+ pcount = ntoks = uta_tokenise( buf, all_toks, max, sep ); // split them up
+ j = 0;
+ if( ntoks > 0 ) {
+ for( i = 0; i < ntoks; i++ ) {
+ if( is_this_myip( iplist, all_toks[i] ) ) {
+ pcount--; // ours, prune
+ } else {
+ toks[j++] = all_toks[i]; // not one of ours, keep it
+ }
+ }
+ }
+
+ free( all_toks );
+ return pcount;
+}
+
/*
Xlate hostname (expected to be name:port) to an IP address that nano will tolerate.
We'll use the first address from the list to keep it simple. If the first character
hent = gethostbyname( dname );
if( hent == NULL || hent->h_addr_list == NULL ) {
- //fprintf( stderr, "[WARN] h2ip: dns lookup failed for: %s\n", dname );
+ //rmr_vlog( RMR_VL_WARN, "h2ip: dns lookup failed for: %s\n", dname );
free( dname );
return NULL;
}
to the list so that we don't pick up entries from the rtable that are for other
processes listening on different interfaces.
- The ENV_BIN_IF environment variable may be either an IP address (v6 must be in
+ The ENV_BIN_IF environment variable may be either an IP address (v6 must be in
square braces), or an interface name (e.g. eth0).
*/
if_addrs_t* mk_ip_list( char* port ) {
snprintf( wbuf, sizeof( wbuf ), "%s:%s", envp, port ); // smash port onto the addr as is
l->addrs[l->naddrs] = strdup( wbuf );
l->naddrs++;
- if( DEBUG ) fprintf( stderr, "[INFO] rmr: using only specific bind interface when searching specific RT entries: %s\n", wbuf );
+ if( DEBUG ) rmr_vlog( RMR_VL_INFO, "rmr: using only specific bind interface when searching specific RT entries: %s\n", wbuf );
return l;
}
if( ele && strcmp( ele->ifa_name, "lo" ) && // do NOT capture the loopback interface address
(target_if == NULL || strcmp( ele->ifa_name, target_if ) == 0 ) ) { // no target, or matches ENV_BIND_IF target
- if( ele->ifa_addr->sa_family == AF_INET ) {
- getnameinfo( ele->ifa_addr, sizeof( struct sockaddr_in ), octs, NI_MAXHOST, NULL, 0, NI_NUMERICHOST );
- fmt = "%s:%s";
- } else {
- if( ele->ifa_addr->sa_family == AF_INET6 ) {
- getnameinfo( ele->ifa_addr, sizeof( struct sockaddr_in6 ), octs, NI_MAXHOST, NULL, 0, NI_NUMERICHOST );
- fmt = "[%s]:%s";
+ if( ele->ifa_addr != NULL ) { // possible for some interfaces to not have an address
+ if( ele->ifa_addr->sa_family == AF_INET ) {
+ getnameinfo( ele->ifa_addr, sizeof( struct sockaddr_in ), octs, NI_MAXHOST, NULL, 0, NI_NUMERICHOST );
+ fmt = "%s:%s";
+ } else {
+ if( ele->ifa_addr->sa_family == AF_INET6 ) {
+ getnameinfo( ele->ifa_addr, sizeof( struct sockaddr_in6 ), octs, NI_MAXHOST, NULL, 0, NI_NUMERICHOST );
+ fmt = "[%s]:%s";
+ }
}
}
*tok = 0;
}
if( l->naddrs < 128 ) {
- if( DEBUG ) fprintf( stderr, "[DBUG] capture address: %s: %s\n", ele->ifa_name, octs );
+ if( DEBUG ) rmr_vlog( RMR_VL_DEBUG, "capture address: %s: %s\n", ele->ifa_name, octs );
snprintf( wbuf, sizeof( wbuf ), fmt, octs, port ); // smash port onto the addr
l->addrs[l->naddrs] = strdup( wbuf );
return 0;
}
+ if( addr == NULL ) {
+ return 0;
+ }
+
for( i = 0; i < l->naddrs; i++ ) {
- if( strcmp( addr, l->addrs[i] ) == 0 ) {
+ if( l->addrs[i] != NULL && strcmp( addr, l->addrs[i] ) == 0 ) {
return 1;
}
}
return NULL;
}
+/*
+ Write all environment variables that we consider to be important to stderr.
+*/
+static void uta_dump_env( ) {
+ char* token;
+ char* elist[] = {
+ ENV_BIND_IF,
+ ENV_RTG_PORT,
+ ENV_RTG_ADDR,
+ ENV_SEED_RT,
+ ENV_SEED_MEMAP,
+ ENV_RTG_RAW,
+ ENV_VERBOSE_FILE,
+ ENV_NAME_ONLY,
+ ENV_WARNINGS,
+ ENV_SRC_ID,
+ ENV_LOG_HR,
+ ENV_LOG_VLEVEL,
+ ENV_CTL_PORT,
+ ENV_RTREQ_FREA
+ };
+ int i;
+
+ for( i = 0; i < sizeof( elist ) / sizeof( char *); i ++ ) {
+ token = getenv( elist[i] );
+ if( token != NULL ) {
+ rmr_vlog( RMR_VL_INFO, "dump_env: %s = '%s'\n", elist[i], token );
+ } else {
+ rmr_vlog( RMR_VL_INFO, "dump_env: %s = <unset>\n", elist[i] );
+ }
+ }
+}
+
#endif
Code Review / ric-plt / lib / rmr.git / blobdiff