terom@26: #include <stdio.h>
terom@26: #include <ctype.h>
terom@26: 
terom@26: #include "config.h"
terom@26: #include "common.h"
terom@26: 
terom@26: void endpoint_init (struct config_endpoint *endpoint, unsigned short default_port) {
terom@26:     // snprintf the default port as a string
terom@26:     snprintf(endpoint->_data.default_port, PORT_TEXT_LEN, "%hu", default_port);
terom@26: 
terom@26:     // set up defaults
terom@26:     endpoint->family = PF_INET;
terom@26:     endpoint->af.inet.addr = NULL;
terom@26:     endpoint->af.inet.port = endpoint->_data.default_port;
terom@26: }
terom@26: 
terom@26: /*
terom@26:  * Parse an endpoint address in human-readable format into the given endpoint. You can then use the socket_*
terom@26:  * functions to work with endpoints and sockets.
terom@26:  *
terom@26:  * Formats supported:
terom@26:  *  =foo.sock, =/quux/bar.sock
terom@26:  *  hostname, 12.34.56.78, [::1]
terom@26:  *  hostname:port, 12.34.56.78:port, [::1]:port
terom@26:  */
terom@26: int endpoint_parse (struct config_endpoint *endpoint, const char *addr_spec) {
terom@26:     // for empty addr specs, just return
terom@26:     if (!addr_spec || *addr_spec == '\0')
terom@26:         return 1;
terom@26: 
terom@26:     if (sscanf(addr_spec, "=%" PATH_TEXT_LEN_STR "s", endpoint->_data.path) == 1) {
terom@26:         // local unix socket
terom@26:         endpoint->family = PF_LOCAL;
terom@26:         endpoint->af.local.path =  endpoint->_data.path;
terom@26: 
terom@26:     } else if (
terom@26:             sscanf(addr_spec, "[%" ADDR_TEXT_LEN_STR "[^]] ]:%" PORT_TEXT_LEN_STR "s", endpoint->_data.addr, endpoint->_data.port) == 2
terom@26:         ||  sscanf(addr_spec, "%" ADDR_TEXT_LEN_STR "[^:] :%" PORT_TEXT_LEN_STR "s", endpoint->_data.addr, endpoint->_data.port) == 2
terom@26:     ) {
terom@26:         endpoint->family = PF_INET;
terom@26:         endpoint->af.inet.addr = endpoint->_data.addr;
terom@26:         endpoint->af.inet.port = endpoint->_data.port;
terom@26: 
terom@26:     } else if (
terom@26:             sscanf(addr_spec, "[%" ADDR_TEXT_LEN_STR "[^]] ]", endpoint->_data.addr) == 1
terom@26:         ||  sscanf(addr_spec, "%" ADDR_TEXT_LEN_STR "[^:]", endpoint->_data.addr) == 1
terom@26:     ) {
terom@26:         endpoint->family = PF_INET;
terom@26:         endpoint->af.inet.addr = endpoint->_data.addr;
terom@26: 
terom@26:     } else {
terom@26:         // unknown foramt
terom@26:         ERROR("unkown address format: %s", addr_spec);
terom@26:     }
terom@26: 
terom@26:     return 0;
terom@26: 
terom@26: error:
terom@26:     return -1;
terom@26: }
terom@26: 
terom@26: int parse_hostport (char *hostport, char **host, char **port) {
terom@26:     char *c;
terom@26: 
terom@26:     int brace = 0, colon = 0;
terom@26:     *host = *port = NULL;
terom@26: 
terom@26:     for (c = hostport; *c != '\0'; c++) {
terom@26:         if (isspace(*c))
terom@26:             continue;
terom@26: 
terom@26:         switch (*c) {
terom@26:             case '[':
terom@26:                 if (c > hostport) {
terom@26:                     error("parse_hostport: %c must be first char, if any: %s", *c, hostport);
terom@26:                     return -1;
terom@26:                 }
terom@26:                 
terom@26:                 brace = *c;
terom@26:                 break;
terom@26: 
terom@26:             case ']':
terom@26:                 if (!brace) {
terom@26:                     error("parse_hostport: %c without matching brace: %s", *c, hostport);
terom@26:                     return -1;
terom@26:                 }
terom@26: 
terom@26:                 if (!*host) {
terom@26:                     error("parse_hostport: empty hostname: %s", hostport);
terom@26:                     return -1;
terom@26:                 }
terom@26: 
terom@26:                 brace = 0;
terom@26:                 break;
terom@26:             
terom@26:             case ':':
terom@26:                 if (brace) {
terom@26:                     // colons inside braces are left as-is
terom@26:                     continue;
terom@26:                 }
terom@26: 
terom@26:                 if (!*host) {
terom@26:                     error("parse_hostport: colon before hostname: %s", hostport);
terom@26:                     return -1;
terom@26:                 }
terom@26: 
terom@26:                 if (*port) {
terom@26:                     error("parse_hostport: colon after port: %s", hostport);
terom@26:                     return -1;
terom@26:                 }
terom@26: 
terom@26:                 if (colon) {
terom@26:                     error("parse_hostport: too many colons: %s", hostport);
terom@26:                     return -1;
terom@26:                 };
terom@26: 
terom@26:                 // finished parsing the host part, move on to the port part
terom@26:                 colon = ':';
terom@26:                 *c = '\0';
terom@26:                 break;
terom@26: 
terom@26:             default:
terom@26:                 if (!*host) {
terom@26:                     // first char of the host
terom@26:                     *host = c;
terom@26: 
terom@26:                 } else if (colon && !*port) {
terom@26:                     // first char of the port
terom@26:                     *port = c;
terom@26: 
terom@26:                 } // else a part of either, don't care about it
terom@26: 
terom@26:                 break;
terom@26:         }
terom@26:     }
terom@26: 
terom@26:     if (!*host) {
terom@26:         error("parse_hostport: missing hostname: %s", hostport);
terom@26:         return -1;
terom@26:     }
terom@26: 
terom@26:     if (brace) {
terom@26:         error("parse_hostport: missing close-brace for %c: %s", brace, hostport);
terom@26:         return -1;
terom@26:     }
terom@26: 
terom@26:     if (colon && !*port) {
terom@26:         error("parse_hostport: missing port: %s", hostport);
terom@26:         return -1;
terom@26:     }
terom@26: 
terom@26:     return 0;
terom@26: }