1 #include <errno.h> 2 #include <string.h> 3 #include <sys/types.h> 4 #include <netinet/in.h> 5 #include <linux/mpls.h> 6 7 #include "utils.h" 8 9 10 static int mpls_pton1(const char *name, struct mpls_label *addr) 11 { 12 char *endp; 13 unsigned count; 14 15 for (count = 0; count < MPLS_MAX_LABELS; count++) { 16 unsigned long label; 17 18 label = strtoul(name, &endp, 0); 19 /* Fail when the label value is out or range */ 20 if (label >= (1 << 20)) 21 return 0; 22 23 if (endp == name) /* no digits */ 24 return 0; 25 26 addr->entry = htonl(label << MPLS_LS_LABEL_SHIFT); 27 if (*endp == '\0') { 28 addr->entry |= htonl(1 << MPLS_LS_S_SHIFT); 29 return 1; 30 } 31 32 /* Bad character in the address */ 33 if (*endp != '/') 34 return 0; 35 36 name = endp + 1; 37 addr += 1; 38 } 39 /* The address was too long */ 40 return 0; 41 } 42 43 int mpls_pton(int af, const char *src, void *addr) 44 { 45 int err; 46 47 switch(af) { 48 case AF_MPLS: 49 errno = 0; 50 err = mpls_pton1(src, (struct mpls_label *)addr); 51 break; 52 default: 53 errno = EAFNOSUPPORT; 54 err = -1; 55 } 56 57 return err; 58 } 59
