mirror of
https://github.com/fluencelabs/musl
synced 2025-06-26 21:22:11 +00:00
eb375ef795
this was unlikely to lead to any crash or dangerous behavior, but caused adjacent string constants to be treated as part of the protocols table, possibly returning nonsensical results for unknown protocol names/numbers or when getprotoent was called in a loop to enumerate all protocols.
58 lines
900 B
C
58 lines
900 B
C
#include <netdb.h>
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#include <string.h>
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/* do we really need all these?? */
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static int idx;
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static const unsigned char protos[][6] = {
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"\000ip",
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"\001icmp",
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"\002igmp",
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"\003ggp",
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"\006tcp",
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"\014pup",
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"\021udp",
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"\026idp",
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"\377raw",
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"\0\0"
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};
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void endprotoent(void)
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{
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idx = 0;
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}
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void setprotoent(int stayopen)
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{
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idx = 0;
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}
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struct protoent *getprotoent(void)
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{
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static struct protoent p;
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static const char *aliases;
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if (!protos[idx][1]) return NULL;
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p.p_proto = protos[idx][0];
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p.p_name = (char *)protos[idx++]+1;
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p.p_aliases = (char **)&aliases;
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return &p;
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}
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struct protoent *getprotobyname(const char *name)
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{
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struct protoent *p;
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endprotoent();
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do p = getprotoent();
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while (p && strcmp(name, p->p_name));
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return p;
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}
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struct protoent *getprotobynumber(int num)
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{
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struct protoent *p;
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endprotoent();
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do p = getprotoent();
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while (p && p->p_proto != num);
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return p;
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}
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