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Annotation of researchv9/ipc/src/libipc/tcp.c, revision 1.1.1.1

1.1       root        1: #include "defs.h"
                      2: #include <ctype.h>
                      3: 
                      4: /*
                      5:  *  convert a port number into a file system name
                      6:  */
                      7: char *
                      8: tcptofs(port)
                      9:        int port;
                     10: {
                     11:        static char name[PATHLEN];
                     12: 
                     13:        sprintf(name, "/cs/tcp.%d", port);
                     14:        return name;
                     15: }
                     16: 
                     17: /*
                     18:  *  convert an internal name into a port number
                     19:  */
                     20: fstotcp(name)
                     21:        char *name;
                     22: {
                     23:        int port;
                     24: 
                     25:        if (strncmp(name, CSROOT, sizeof(CSROOT)-1)==0)
                     26:                name += sizeof(CSROOT)-1;
                     27:        if (strncmp(name, "tcp.", sizeof("tcp.")-1)==0)
                     28:                name += sizeof("tcp.")-1;
                     29:        for (port=0; *name; name++) {
                     30:                if (!isdigit(*name))
                     31:                        return -1;
                     32:                port = port*10 + (*name - '0');
                     33:        }
                     34:        return port;
                     35: }
                     36: 
                     37: /*
                     38:  *  ipccreate a tcp usable port.  a bit of a crock.
                     39:  */
                     40: tcpcreat(name, param)
                     41:        char *name;
                     42:        char *param;
                     43: {
                     44:        int p;
                     45:        int offset;
                     46:        int fd= -1;
                     47: 
                     48:        if (getuid()==0)
                     49:                offset = 512;
                     50:        else
                     51:                offset = 1024;
                     52:        for (p=0; p<511 && fd<0; p++) {
                     53:                strcpy(name, tcptofs(p+offset));
                     54:                fd = ipccreat(name, param);
                     55:                if (fd<0)
                     56:                        continue;
                     57:        }
                     58:        return fd;
                     59: }

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