9e35dd86bb
- Added `socket_create`. - Added `socket_configure`. - Added socket error utilities - Added unit tests.
48 lines
881 B
C
48 lines
881 B
C
#include "internal/icmp_internal.h"
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#include "internal/icmp_socket.h"
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include <string.h>
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/* Forward declarations */
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static void handle_socket_error(struct icmp_handle *h, int err);
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/* -------------------- */
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int
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socket_create(struct icmp_handle *h)
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{
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int fd;
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/* Create raw ICMP socket */
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fd = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
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if (fd < 0)
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{
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handle_socket_error(h, errno);
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return -1;
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}
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/* Store file descriptor in handle */
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h->fd = fd;
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/* Clear error state on success */
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socket_clear_error(h);
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return 0;
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}
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static void
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handle_socket_error(struct icmp_handle *h, int err)
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{
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if (EPERM == err)
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{
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socket_set_error(h, ICMP_ERR_PERMISSION,
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"Raw socket requires CAP_NET_RAW or root");
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}
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else
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{
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socket_set_error(h, ICMP_ERR_SOCKET,
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"socket() failed: %s", strerror(err));
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}
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}
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