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Annotation of researchv10no/ipc/libin/tcp.c, revision 1.1.1.1

1.1       root        1: #include "defs.h"
                      2: #include <ctype.h>
                      3: #include <sys/inet/in.h>
                      4: 
                      5: /*
                      6:  *  convert a port number into a file system name
                      7:  */
                      8: char *
                      9: tcptofs(port)
                     10:        int port;
                     11: {
                     12:        static char name[PATHLEN];
                     13:        struct in_service *s;
                     14: 
                     15:        s = in_service((char *)0, "tcp", (unsigned long)port);
                     16:        if(s)
                     17:                sprintf(name, "/cs/%s", s->name);
                     18:        else
                     19:                sprintf(name, "/cs/tcp.%d", port);
                     20:        return name;
                     21: }
                     22: 
                     23: /*
                     24:  *  convert an internal name into a port number
                     25:  */
                     26: fstotcp(name)
                     27:        char *name;
                     28: {
                     29:        int port;
                     30:        struct in_service *s;
                     31: 
                     32:        /*
                     33:         *  the format could be
                     34:         *      [/cs/][tcp.]nnn
                     35:         *  where the []'s indicate optional peices and
                     36:         *  nnn is the port number
                     37:         */
                     38:        if (strncmp(name, CSROOT, sizeof(CSROOT)-1)==0)
                     39:                name += sizeof(CSROOT)-1;
                     40:        if (strncmp(name, "tcp.", sizeof("tcp.")-1)==0)
                     41:                name += sizeof("tcp.")-1;
                     42:        for (port=0; *name; name++) {
                     43:                if (!isdigit(*name)){
                     44:                        port=0;
                     45:                        break;
                     46:                }
                     47:                port = port*10 + (*name - '0');
                     48:        }
                     49:        /*
                     50:         *  or this may be a name in /etc/inservices
                     51:         */
                     52:        if(port == 0) {
                     53:                s = in_service(name, "tcp", (unsigned long)0);
                     54:                if(s)
                     55:                        port = s->port;
                     56:        }
                     57:        return port;
                     58: }

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