ref: 8560a458d2b4ade92ff8354e2a16db3256bead43
dir: /sys/src/libauthsrv/_asrdresp.c/
#include <u.h> #include <libc.h> #include <authsrv.h> static char *pbmsg = "AS protocol botch"; int _asrdresp(int fd, char *buf, int len) { int n; char error[64]; if(read(fd, buf, 1) != 1){ werrstr(pbmsg); return -1; } n = len; switch(buf[0]){ case AuthOK: if(readn(fd, buf, len) != len){ werrstr(pbmsg); return -1; } break; case AuthErr: if(readn(fd, error, sizeof error) != sizeof error){ werrstr(pbmsg); return -1; } error[sizeof error-1] = '\0'; werrstr("remote: %s", error); return -1; case AuthOKvar: if(readn(fd, error, 5) != 5){ werrstr(pbmsg); return -1; } error[5] = 0; n = atoi(error); if(n <= 0 || n > len){ werrstr(pbmsg); return -1; } memset(buf, 0, len); if(readn(fd, buf, n) != n){ werrstr(pbmsg); return -1; } break; default: werrstr(pbmsg); return -1; } return n; }